Flume NG 配置

ゝ一纸荒年。 2022-08-13 11:49 192阅读 0赞

这篇文章主要讲了一些配置，如果各位看官通读了官方文档，那这个就不必看了，如果懒得看英文就看看这篇转载的配置介绍，说实话flume-ng已经是很简单了！

（说明，名词对应解释 源-Source，接收器-Sink，通道-Channel）

配置

设置代理

Flume代理配置存储在本地配置文件。这是一个文本文件格式，是Java属性文件格式。在相同的配置文件，可以指定一个或多个代理的配置。配置文件包括每个源，接收器和通道，把它们连接在一起，形成数据流。

配置单个组件

流中每个组件（源，接收器或通道）都有名称，类型，和一组特定实例的属性。例如，Avro源需要一个接收数据的主机名（或IP地址）和端口号。一个内存通道可以有最大队列大小（“能力”），HDFS的Sink需要知道文件系统的URI，路径创建文件，文件的创建频率（“hdfs.rollInterval”）等，所有这些组件的属性需要设置在Flume代理的属性文件。

组合组件

代理需要知道如何加载各个组件以及它们是如何连接，以构成流。这是通过列出的源，接收器及通道的名称，然后指定每个接收器和源的连接通道。例如，流定义，Avro源avroWeb 到HDFS接收器hdfs-cluster1，通过JDBC通道jdbc-channel。该配置文件将包含这些组件，jdbc-channel通道作为avroWeb源和hdfs-cluster接收器共享存在。

flume-ng 命令行参数

Java代码   ![收藏代码][icon_star.png]

1. Usage: ./flume-ng <command> \[options\]...  
2.   
3. commands:  
4.   help                  display **this** help text  
5.   agent                 run a Flume agent  
6.   avro-client           run an avro Flume client  
7.   
8. global options:  
9.   --conf,-c <conf>      use configs in <conf> directory  
10.   --classpath,-C <cp>   append to the classpath  
11.   --dryrun,-d           **do** not actually start Flume, just print the command  
12.   -Dproperty=value      sets a JDK system property value  
13.   
14. agent options:  
15.   --conf-file,-f        specify a config file (required)  
16.   --name,-n             the name of **this** agent (required)  
17.   --help,-h             display help text  
18.   
19. avro-client options:  
20.   --host,-H <host>      hostname to which events will be sent (required)  
21.   --port,-p <port>      port of the avro source (required)  
22.   --filename,-F <file>  text file to stream to avro source \[**default**: std input\]  
23.   --headerFile,-R <file> headerFile containing headers as key/value pairs on each **new** line  
24.   --help,-h             display help text  
25.   
26. Note that **if** <conf> directory is specified, then it is always included first  
27. in the classpath.

定义流

启动代理

代理是通过使用在bin目录下的shell脚本flume-ng。你需要在命令行上指定的代理的名称和配置文件

<table style="border-collapse:collapse; color:rgb(0,0,0); font-size:15px"> 
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 <td style="font-size:1em; vertical-align:top; width:394.5pt; border:1pt solid rgb(0,0,0); padding:5pt; background-color:rgb(217,217,217)"> $ bin/flume-ng agent -n foo -f conf/flume-conf.properties.template </td> 
 </tr> 
 </tbody> 
</table>

数据摄取

Flume支持摄取外部数据源的数量的机制。

RPC

Avro客户端包含在Flume发行版本中，可以发送一个给定的文件给Flume，Avro 源使用AVRO RPC机制。

上面的命令，将要发送/usr/logs/log.10到Flume Source(监听在41414端口)

执行命令

还有一个exec执行一个给定的命令获得输出的源。一个单一的输出，即“line”。回车（'\\ R'）或换行符（'\\ N'），或两者一起的文本。Flume不支持tail做为一个源，不过可以通过exec tail。

网络流

***          ***

Flume支持以下的机制，从流行的日志流类型读取数据

1)Avro

2)Syslog

3)Netcat

Flume部署种类

1)多代理流程

2)合并

3)多路复用流

配置

Flume代理配置读取一个文件，类似于一个Java属性格式文件。

定义流

在一个单一的代理定义的流，你需要通过一个通道的来源和接收器链接。你需要列出源，接收器和通道，为给定的代理，然后指向源和接收器及通道。一个源的实例可以指定多个通道，但只能指定一个接收器实例通道。格式如下：

<table style="color:rgb(0,0,0); font-family:Helvetica,Tahoma,Arial,sans-serif; line-height:25.2000007629395px; border-collapse:collapse; font-size:15px"> 
 <tbody> 
 <tr style="height:0pt"> 
 <td style="font-size:1em; vertical-align:top; width:468pt; border:1pt solid rgb(0,0,0); padding:5pt; background-color:rgb(217,217,217)"> #List the sources, sinks and channels for the agent &lt;agent&gt;.sources =&nbsp;&lt;Source&gt; &lt;agent&gt;.sinks =&nbsp;&lt;Sink&gt; &lt;agent&gt;.channels =&nbsp;&lt;Channel1&gt; &lt;Channel2&gt; &nbsp; #set channel for source &lt;agent&gt;.sources.&lt;Source&gt;.channels =&nbsp;&lt;Channel1&gt;&nbsp;&lt;Channel2&gt;&nbsp;... &nbsp; #set channel for sink &lt;agent&gt;.sinks.&lt;Sink&gt;.channel =&nbsp;&lt;Channel1&gt; 
 <div> 
 
 </div> </td> 
 </tr> 
 </tbody> 
</table>

例如一个代理名为weblog-agent，外部通过avro客户端，并且发送数据通过内存通道给hdfs。在配置文件weblog.config的可能看起来像这样：

这将使事件流从avro-AppSrv-source到hdfs-Cluster1-sink通过内存通道mem-channel-1。当代理开始weblog.config作为其配置文件，它会实例化流。

配置单个组件

定义流之后，你需要设置每个源，接收器和通道的属性。可以分别设定组件的属性值。

<table style="color:rgb(0,0,0); font-family:Helvetica,Tahoma,Arial,sans-serif; line-height:25.2000007629395px; border-collapse:collapse; font-size:15px"> 
 <tbody> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:468pt; border:1pt solid rgb(0,0,0); padding:5pt; background-color:rgb(217,217,217)"> #Properties for sources &lt;agent&gt;.sources.&lt;Source&gt;.&lt;someProperty&gt;&nbsp;=&nbsp;&lt;someValue&gt; .. &nbsp; #Properties for channels &lt;agent&gt;.channel.&lt;Channel&gt;.&lt;someProperty&gt;&nbsp;=&nbsp;&lt;someValue&gt; .. &nbsp; #Properties for sinks &lt;agent&gt;.sources.&lt;Sink&gt;.&lt;someProperty&gt;&nbsp;=&nbsp;&lt;someValue&gt; 
 <div> 
 
 </div> </td> 
 </tr> 
 </tbody> 
</table>

“type”属性必须为每个组件设置，以了解它需要什么样的对象。每个源，接收器和通道类型有其自己的一套，它所需的性能，以实现预期的功能。所有这些，必须根据需要设置。在前面的例子中，我们拿到从hdfs-Cluster1-sink中的流到HDFS，通过内存通道mem-channel-1的avro-AppSrv-source源。下面是一个例子，显示了这些组件的配置。

<table style="color:rgb(0,0,0); font-family:Helvetica,Tahoma,Arial,sans-serif; line-height:25.2000007629395px; border-collapse:collapse; font-size:15px"> 
 <tbody> 
 <tr style="height:0pt"> 
 <td style="font-size:1em; vertical-align:top; width:468pt; border:1pt solid rgb(0,0,0); padding:5pt; background-color:rgb(217,217,217)"> weblog-agent.sources = avro-AppSrv-source weblog-agent.sinks = hdfs-Cluster1-sink weblog-agent.channels = mem-channel-1 &nbsp; #set channel for sources, sinks .. &nbsp; #properties of avro-AppSrv-source weblog-agent.sources.avro-AppSrv-source.type =&nbsp;avro weblog-agent.sources.avro-AppSrv-source.bind = localhost weblog-agent.sources.avro-AppSrv-source.port = 10000 &nbsp; #properties of mem-channel-1 weblog-agent.channels.mem-channel-1.type = memory weblog-agent.channels.mem-channel-1.capacity = 1000 weblog-agent.channels.mem-channel-1.transactionCapacity = 100 &nbsp; #properties of hdfs-Cluster1-sink weblog-agent.sinks.hdfs-Cluster1-sink.type = hdfs weblog-agent.sinks.hdfs-Cluster1-sink.hdfs.path = hdfs://namenode/flume/webdata/ … </td> 
 </tr> 
 </tbody> 
</table>

在代理添加多个流

单个Flume代理可以包含几个独立的流。你可以在一个配置文件中列出多个源，接收器和通道。这些组件可以连接形成多个流。

那么你就可以连接源和接收器到其相应的通道，设置两个不同的流。例如，如果您需要设置一个weblog代理两个流，一个从外部Avro客户端到HDFS，另外一个是tail的输出到Avro接收器，然后在这里是做一个配置：

<table style="color:rgb(0,0,0); line-height:25.2000007629395px; font-family:Arial; border-collapse:collapse; font-size:15px"> 
 <tbody> 
 <tr style="height:0pt"> 
 <td style="font-size:1em; vertical-align:top; width:468pt; border:1pt solid rgb(0,0,0); padding:5pt; background-color:rgb(217,217,217)"> #List the sources, sinks and channels in the agent weblog-agent.sources = avro-AppSrv-source1 exec-tail-source2 weblog-agent.sinks = hdfs-Cluster1-sink1 avro-forward-sink2 weblog-agent.channels = mem-channel-1 jdbc-channel-2 &nbsp; ## Flow-1 configuration weblog-agent.sources.avro-AppSrv-source1.channels =&nbsp;mem-channel-1&nbsp; weblog-agent.sinks.hdfs-Cluster1-sink1.channel =&nbsp;mem-channel-1 &nbsp; ## Flow-2 configuration weblog-agent.sources.exec-tail-source2.channels =&nbsp;jdbc-channel-2&nbsp; weblog-agent.sinks.avro-forward-sink2.channel =&nbsp;jdbc-channel-2 </td> 
 </tr> 
 </tbody> 
</table>

配置多代理流程

设置一个多层的流，你需要有一个指向下一跳avro源的第一跳的avro 接收器。这将导致第一Flume代理转发事件到下一个Flume代理。例如，如果您定期发送的文件，每个事件（1文件）AVRO客户端使用本地Flume代理，那么这个当地的代理可以转发到另一个有存储的代理。

<table style="color:rgb(0,0,0); line-height:25.2000007629395px; border-collapse:collapse; font-family:Arial; font-size:15px"> 
 <tbody> 
 <tr style="height:0pt"> 
 <td style="font-size:1em; vertical-align:top; width:468pt; border:1pt solid rgb(0,0,0); padding:5pt; background-color:rgb(217,217,217)"> ##&nbsp;weblog agent config &nbsp; #List sources, sinks and channels in the agent weblog-agent.sources = avro-AppSrv-source weblog-agent.sinks = avro-forward-sink weblog-agent.channels&nbsp;= jdbc-channel &nbsp; #define the flow weblog-agent.sources.avro-AppSrv-source.channels = jdbc-channel weblog-agent.sinks.avro-forward-sink.channel = jdbc-channel &nbsp; #avro sink properties weblog-agent.sources.avro-forward-sink.type = avro weblog-agent.sources.avro-forward-sink.hostname =&nbsp;10.1.1.100 weblog-agent.sources.avro-forward-sink.port =&nbsp;10000 &nbsp; #configure other pieces ... </td> 
 </tr> 
 </tbody> 
</table>

<table style="color:rgb(0,0,0); line-height:25.2000007629395px; border-collapse:collapse; font-family:Arial; font-size:15px"> 
 <tbody> 
 <tr style="height:0pt"> 
 <td style="font-size:1em; vertical-align:top; width:468pt; border:1pt solid rgb(0,0,0); padding:5pt; background-color:rgb(217,217,217)"> ## hdfs-agent config &nbsp; #List sources, sinks and channels in the agent hdfs-agent.sources = avro-collection-source hdfs-agent.sinks = hdfs-sink hdfs-agent.channels = mem-channel &nbsp; #define the flow hdfs-agent.sources.avro-collection-source.channels = mem-channel hdfs-agent.sinks.hdfs-sink.channel = mem-channel &nbsp; #avro source properties hdfs-agent.sources.avro-collection-source.type = avro hdfs-agent.sources.avro-collection-source.bind =&nbsp;10.1.1.100 hdfs-agent.sources.avro-collection-source.port =&nbsp;10000 &nbsp; #configure other pieces ... </td> 
 </tr> 
 </tbody> 
</table>

这里我们连接从weblog-agent的avro-forward-sink 到hdfs-agent的avro-collection-source收集源。最终结果从外部源的appserver最终存储在HDFS的事件。

扇出流

Flume支持扇出流从一个源到多个通道。有两种模式的扇出，复制和复用。在复制流的事件被发送到所有的配置通道。在复用的情况下，事件被发送到合格的渠道只有一个子集。煽出流，需要指定源和煽出通道的规则。这是通过添加一个通道“选择”，可以复制或复。再进一步指定选择的规则，如果它是一个多路。如果你不指定一个选择，则默认情况下它复制。

<table style="color:rgb(0,0,0); line-height:25.2000007629395px; border-collapse:collapse; font-family:Arial; font-size:15px"> 
 <tbody> 
 <tr style="height:0pt"> 
 <td style="font-size:1em; vertical-align:top; width:468pt; border:1pt solid rgb(0,0,0); padding:5pt; background-color:rgb(217,217,217)"> #List the sources, sinks and channels for the agent &lt;agent&gt;.sources =&nbsp;&lt;Source1&gt; &lt;agent&gt;.sinks =&nbsp;&lt;Sink1&gt; &lt;Sink2&gt; &lt;agent&gt;.channels =&nbsp;&lt;Channel1&gt; &lt;Channel2&gt; &nbsp; #set list of channels for source (separated by space) &lt;agent&gt;.sources.&lt;Source1&gt;.channels =&nbsp;&lt;Channel1&gt; &lt;Channel2&gt; &nbsp; #set channel for sinks &lt;agent&gt;.sinks.&lt;Sink1&gt;.channel =&nbsp;&lt;Channel1&gt; &lt;agent&gt;.sinks.&lt;Sink2&gt;.channel =&nbsp;&lt;Channel2&gt; &nbsp; &lt;agent&gt;.sources.&lt;Source1&gt;.selector.type = replicating </td> 
 </tr> 
 </tbody> 
</table>

复用的选择集的属性进一步分叉。这需要指定一个事件属性映射到一组通道。选择配置属性中的每个事件头检查。如果指定的值相匹配，那么该事件被发送到所有的通道映射到该值。如果没有匹配，那么该事件被发送到设置为默认配置的通道。

映射允许每个值通道可以重叠。默认值可以包含任意数量的通道。下面的示例中有一个单一的流复用两条路径。代理有一个单一的avro源和连接道两个接收器的两个通道。

<table style="color:rgb(0,0,0); line-height:25.2000007629395px; border-collapse:collapse; font-family:Arial; font-size:15px"> 
 <tbody> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:468pt; border:1pt solid rgb(0,0,0); padding:5pt; background-color:rgb(217,217,217)"> #List the sources, sinks and channels in the agent weblog-agent.sources = avro-AppSrv-source1 weblog-agent.sinks = hdfs-Cluster1-sink1 avro-forward-sink2 weblog-agent.channels = mem-channel-1 jdbc-channel-2 # set channels for source weblog-agent.sources.avro-AppSrv-source1.channels = mem-channel-1 jdbc-channel-2 &nbsp; #set channel for sinks weblog-agent.sinks.hdfs-Cluster1-sink1.channel = mem-channel-1 weblog-agent.sinks.avro-forward-sink2.channel = jdbc-channel-2 &nbsp; # weblog-agent.sources.avro-AppSrv-source1.selector.type = multiplexing weblog-agent.sources.avro-AppSrv-source1.selector.header = State weblog-agent.sources.avro-AppSrv-source1.selector.mapping.CA = mem-channel-1 weblog-agent.sources.avro-AppSrv-source1.selector.mapping.AZ = jdbc-channel-2 weblog-agent.sources.avro-AppSrv-source1.selector.mapping.NY = mem-channel-1 jdbc-channel-2 weblog-agent.sources.avro-AppSrv-source1.selector.default = mem-channel-1 </td> 
 </tr> 
 </tbody> 
</table>

“State”作为Header的选择检查。如果值是“CA”，然后将其发送到mem-channel-1，如果它的“AZ”的，那么jdbc-channel-2，如果它的“NY”那么发到这两个。如果“State”头未设置或不匹配的任何三个，然后去默认的mem-channel-1通道。

Flume 源(Source)

Avro 源

Avro端口监听并接收来自外部的Avro客户流的事件。当内置AvroSink另一个（前跳）Flume代理，它可以创建分层集合配对拓扑。

Exec 源

此源启动运行一个给定的Unix命令，预计这一过程中不断产生标准输出（stderr被简单地丢弃，除非logStdErr= TRUE）上的数据。如果因任何原因的进程退出时，源也退出，并不会产生任何进一步的数据。

<table style="color:rgb(0,0,0); line-height:25.2000007629395px; border-collapse:collapse; font-family:Arial; font-size:15px"> 
 <tbody> 
 <tr style="height:0pt"> 
 <td style="font-size:1em; vertical-align:top; width:102pt; border:1pt solid rgb(0,0,0); padding:5pt"> Property Name </td> 
 <td style="font-size:1em; vertical-align:top; width:63.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> Default </td> 
 <td style="font-size:1em; vertical-align:top; width:302.2pt; border:1pt solid rgb(0,0,0); padding:5pt"> Description </td> 
 </tr> 
 <tr style="height:0pt"> 
 <td style="font-size:1em; vertical-align:top; width:102pt; border:1pt solid rgb(0,0,0); padding:5pt"> type </td> 
 <td style="font-size:1em; vertical-align:top; width:63.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> - </td> 
 <td style="font-size:1em; vertical-align:top; width:302.2pt; border:1pt solid rgb(0,0,0); padding:5pt"> The component type name, needs to be&nbsp;exec </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:102pt; border:1pt solid rgb(0,0,0); padding:5pt"> command </td> 
 <td style="font-size:1em; vertical-align:top; width:63.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> - </td> 
 <td style="font-size:1em; vertical-align:top; width:302.2pt; border:1pt solid rgb(0,0,0); padding:5pt"> The command to execute </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:102pt; border:1pt solid rgb(0,0,0); padding:5pt"> restartThrottle </td> 
 <td style="font-size:1em; vertical-align:top; width:63.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> 10000 </td> 
 <td style="font-size:1em; vertical-align:top; width:302.2pt; border:1pt solid rgb(0,0,0); padding:5pt"> Amount of time (in millis) to wait before attempting a restart </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:102pt; border:1pt solid rgb(0,0,0); padding:5pt"> restart </td> 
 <td style="font-size:1em; vertical-align:top; width:63.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> false </td> 
 <td style="font-size:1em; vertical-align:top; width:302.2pt; border:1pt solid rgb(0,0,0); padding:5pt"> Whether the executed cmd should be restarted if it dies </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:102pt; border:1pt solid rgb(0,0,0); padding:5pt"> logStdErr </td> 
 <td style="font-size:1em; vertical-align:top; width:63.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> false </td> 
 <td style="font-size:1em; vertical-align:top; width:302.2pt; border:1pt solid rgb(0,0,0); padding:5pt"> Whether the command’s stderr should be logged </td> 
 </tr> 
 </tbody> 
</table>

例,

NetCat 源

一个netcat在某一端口上侦听，每一行文字变成一个事件源。行为像“nc -k -l \[主机\]\[端口\]”。换句话说，它打开一个指定端口，侦听数据。意料的是，所提供的数据是换行符分隔的文本。每一行文字变成Flume事件，并通过连接通道发送。

序列发生器源

一个简单的序列发生器，不断产成与事件计数器0和1的增量开始。主要用于测试。

Syslog 源

读取syslog数据，并生成Flume事件。 UDP源将作为一个单一的事件的整个消息。 TCP源回车（\\ n）来分隔的字符串创建一个新的事件。

Syslog TCP

####  ####

例如, a syslog TCP source:

#### Syslog UDP ####

例如, a syslog UDP source:

###  ###

遗留源

遗留源，让Flume1.x的代理收到Flume0.9.4代理的事件。接受在Flume0.9.4格式的事件，并将它们转换为Flume1.0格式，并存储在连接的通道。如时间戳0.9.4事件属性，PRI，主机，毫微秒，等地转化为1.x的事件头属性。

遗留源支持的Avro和Thrift的RPC连接。使用这两个Flume版本之间的桥梁，您需要启动与avroLegacy或thriftLegacy源Flume1.x的代理。 0.9.4代理应该有指向1.x的代理主机/端口的agentSink。

Avro Legacy

####  ####

#### Thrift Legacy ####

自定义源

自定义的来源是你自己的实现Source接口。自定义源的类和它的依赖，必须包含在代理的classpath时开始运行Flume代理。自定义源的类型是其FQCN(   Fully-Qualified Class Name)。

Flume 接收器(Sink)

HDFS Sink

这Sink写入到Hadoop分布式文件系统（HDFS）的事件。目前，它支持创建文本和序列文件。它支持在这两个文件类型的压缩。对所用的时间、数据大小、事件的数量为参数，对文件进行关闭（关闭当前文件，并创建一个新的）。它还可以对事件 源的机器名及时间属性分离数据。 HDFS目录路径可能包含格式转义序列将取代由HDFS sink生成一个目录/文件名存储的事件。

以下是支持的转义序列 -

<table style="border-collapse:collapse; color:rgb(0,0,0); font-family:Arial; font-size:15px"> 
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 <td style="font-size:1em; vertical-align:top; width:63.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> %{host} </td> 
 <td style="font-size:1em; vertical-align:top; width:285.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> host name stored in event header </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:63.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> %t </td> 
 <td style="font-size:1em; vertical-align:top; width:285.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> Unix time in milliseconds &nbsp; </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:63.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> %a </td> 
 <td style="font-size:1em; vertical-align:top; width:285.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> locale’s short weekday name (Mon, Tue, …) </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:63.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> %A </td> 
 <td style="font-size:1em; vertical-align:top; width:285.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> locale’s full weekday name (Monday, Tuesday, …) </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:63.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> %b </td> 
 <td style="font-size:1em; vertical-align:top; width:285.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> locale’s short month name (Jan, Feb,…) </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:63.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> %B </td> 
 <td style="font-size:1em; vertical-align:top; width:285.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> locale’s long month name (January, February,…) </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:63.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> %c </td> 
 <td style="font-size:1em; vertical-align:top; width:285.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> locale’s date and time (Thu Mar 3 23:05:25 2005) </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:63.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> %d </td> 
 <td style="font-size:1em; vertical-align:top; width:285.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> day of month (01) </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:63.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> %D </td> 
 <td style="font-size:1em; vertical-align:top; width:285.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> date; same as %m/%d/%y </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:63.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> %H </td> 
 <td style="font-size:1em; vertical-align:top; width:285.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> hour (00..23) </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:63.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> %I </td> 
 <td style="font-size:1em; vertical-align:top; width:285.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> hour (01..12) </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:63.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> %j </td> 
 <td style="font-size:1em; vertical-align:top; width:285.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> day of year (001..366) </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:63.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> %k </td> 
 <td style="font-size:1em; vertical-align:top; width:285.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> hour ( 0..23) </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:63.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> %m </td> 
 <td style="font-size:1em; vertical-align:top; width:285.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> month (01..12) </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:63.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> %M </td> 
 <td style="font-size:1em; vertical-align:top; width:285.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> minute (00..59) </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:63.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> %P </td> 
 <td style="font-size:1em; vertical-align:top; width:285.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> locale’s equivalent of am or pm </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:63.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> %s </td> 
 <td style="font-size:1em; vertical-align:top; width:285.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> seconds since 1970-01-01 00:00:00 UTC </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:63.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> %S </td> 
 <td style="font-size:1em; vertical-align:top; width:285.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> second (00..59) </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:63.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> %y </td> 
 <td style="font-size:1em; vertical-align:top; width:285.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> last two digits of year (00..99) </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:63.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> %Y </td> 
 <td style="font-size:1em; vertical-align:top; width:285.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> year (2010) </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:63.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> %z </td> 
 <td style="font-size:1em; vertical-align:top; width:285.8pt; border:1pt solid rgb(0,0,0); padding:5pt"> +hhmm numeric timezone (for example, -0400) </td> 
 </tr> 
 </tbody> 
</table>

使用中的文件将有指定扩展名，以".tmp"结尾。一旦文件被关闭，该扩展被删除。这使得不包括部分完成的文件在该目录中。

<table style="border-collapse:collapse; color:rgb(0,0,0); font-family:Arial; font-size:15px"> 
 <tbody> 
 <tr style="height:0pt"> 
 <td style="font-size:1em; vertical-align:top; width:126pt; border:1pt solid rgb(0,0,0); padding:5pt"> Name </td> 
 <td style="font-size:1em; vertical-align:top; width:82.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> Default </td> 
 <td style="font-size:1em; vertical-align:top; width:259.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> Description </td> 
 </tr> 
 <tr style="height:0pt"> 
 <td style="font-size:1em; vertical-align:top; width:126pt; border:1pt solid rgb(0,0,0); padding:5pt"> type </td> 
 <td style="font-size:1em; vertical-align:top; width:82.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> - </td> 
 <td style="font-size:1em; vertical-align:top; width:259.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> The component type name, needs to be&nbsp;hdfs </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:126pt; border:1pt solid rgb(0,0,0); padding:5pt"> hdfs.path </td> 
 <td style="font-size:1em; vertical-align:top; width:82.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> - </td> 
 <td style="font-size:1em; vertical-align:top; width:259.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> HDFS directory path (eg hdfs://namenode/flume/webdata/) </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:126pt; border:1pt solid rgb(0,0,0); padding:5pt"> hdfs.filePrefix </td> 
 <td style="font-size:1em; vertical-align:top; width:82.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> FlumeData </td> 
 <td style="font-size:1em; vertical-align:top; width:259.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> Name prefixed to files created by Flume in hdfs directory </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:126pt; border:1pt solid rgb(0,0,0); padding:5pt"> hdfs.rollInterval </td> 
 <td style="font-size:1em; vertical-align:top; width:82.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> 30 </td> 
 <td style="font-size:1em; vertical-align:top; width:259.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> Number of seconds to wait before rolling current file </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:126pt; border:1pt solid rgb(0,0,0); padding:5pt"> hdfs.rollSize </td> 
 <td style="font-size:1em; vertical-align:top; width:82.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> 1024 </td> 
 <td style="font-size:1em; vertical-align:top; width:259.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> File size to trigger roll (in bytes) </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:126pt; border:1pt solid rgb(0,0,0); padding:5pt"> hdfs.rollCount </td> 
 <td style="font-size:1em; vertical-align:top; width:82.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> 10 </td> 
 <td style="font-size:1em; vertical-align:top; width:259.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> Number of events written to file before it rolled </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:126pt; border:1pt solid rgb(0,0,0); padding:5pt"> hdfs.batchSize </td> 
 <td style="font-size:1em; vertical-align:top; width:82.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> 1 </td> 
 <td style="font-size:1em; vertical-align:top; width:259.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> number of events written to file before it flushed to HDFS </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:126pt; border:1pt solid rgb(0,0,0); padding:5pt"> hdfs.txnEventMax </td> 
 <td style="font-size:1em; vertical-align:top; width:82.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> 100 </td> 
 <td style="font-size:1em; vertical-align:top; width:259.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> &nbsp; </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:126pt; border:1pt solid rgb(0,0,0); padding:5pt"> hdfs.codeC </td> 
 <td style="font-size:1em; vertical-align:top; width:82.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> - </td> 
 <td style="font-size:1em; vertical-align:top; width:259.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> Compression codec. one of following : &nbsp;gzip, bzip2, lzo, snappy </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:126pt; border:1pt solid rgb(0,0,0); padding:5pt"> hdfs.fileType </td> 
 <td style="font-size:1em; vertical-align:top; width:82.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> SequenceFile </td> 
 <td style="font-size:1em; vertical-align:top; width:259.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> File format - currently SequenceFile or DataStream </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:126pt; border:1pt solid rgb(0,0,0); padding:5pt"> hdfs.maxOpenFiles </td> 
 <td style="font-size:1em; vertical-align:top; width:82.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> 5000 </td> 
 <td style="font-size:1em; vertical-align:top; width:259.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> &nbsp; </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:126pt; border:1pt solid rgb(0,0,0); padding:5pt"> hdfs.writeFormat </td> 
 <td style="font-size:1em; vertical-align:top; width:82.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> - </td> 
 <td style="font-size:1em; vertical-align:top; width:259.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> “Text” or “Writable” </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:126pt; border:1pt solid rgb(0,0,0); padding:5pt"> hdfs.appendTimeout </td> 
 <td style="font-size:1em; vertical-align:top; width:82.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> 1000 </td> 
 <td style="font-size:1em; vertical-align:top; width:259.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> &nbsp; </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:126pt; border:1pt solid rgb(0,0,0); padding:5pt"> hdfs.callTimeout </td> 
 <td style="font-size:1em; vertical-align:top; width:82.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> 5000 </td> 
 <td style="font-size:1em; vertical-align:top; width:259.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> &nbsp; </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:126pt; border:1pt solid rgb(0,0,0); padding:5pt"> hdfs.threadsPoolSize </td> 
 <td style="font-size:1em; vertical-align:top; width:82.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> 10 </td> 
 <td style="font-size:1em; vertical-align:top; width:259.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> &nbsp; </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:126pt; border:1pt solid rgb(0,0,0); padding:5pt"> hdfs.kerberosPrincipal </td> 
 <td style="font-size:1em; vertical-align:top; width:82.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> “” </td> 
 <td style="font-size:1em; vertical-align:top; width:259.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> Kerberos user principal for accessing secure HDFS </td> 
 </tr> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:126pt; border:1pt solid rgb(0,0,0); padding:5pt"> hdfs.kerberosKeytab </td> 
 <td style="font-size:1em; vertical-align:top; width:82.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> “” </td> 
 <td style="font-size:1em; vertical-align:top; width:259.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> Kerberos keytab for accessing secure HDFS </td> 
 </tr> 
 </tbody> 
</table>

Logger sink

INFO级别的日志事件。通常有用的测试/调试目的。

<table style="border-collapse:collapse; color:rgb(0,0,0); font-size:15px"> 
 <tbody> 
 <tr> 
 <td style="font-size:1em; vertical-align:top; width:124.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> type </td> 
 <td style="font-size:1em; vertical-align:top; width:85.5pt; border:1pt solid rgb(0,0,0); padding:5pt"> - </td> 
 <td style="font-size:1em; vertical-align:top; width:258pt; border:1pt solid rgb(0,0,0); padding:5pt"> The component type name, needs to be&nbsp;logger </td> 
 </tr> 
 </tbody> 
</table>

Avro

avro支持Flume分层。Flume事件发送到sink通过avro事件发送到配置的主机名/端口对。这些事件可以批量传输到通道。

IRC Sink

IRC Sink 从通道中取得信息到IRC Server。

The IRC sink takes messages from attached channel and relays those to configured IRC destinations.

<table style="margin:0px 0px 18px; padding:0px; border:1px solid rgb(221,221,221); font-size:13px; line-height:1; border-spacing:0px; width:1381px; color:rgb(64,64,64)"> 
 <tbody> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border:0px; line-height:18px; vertical-align:top"> Property Name </td> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:0px 0px 0px 1px; border-left-style:solid; border-left-color:rgb(221,221,221); line-height:18px; vertical-align:top"> Default </td> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:0px 0px 0px 1px; border-left-style:solid; border-left-color:rgb(221,221,221); line-height:18px; vertical-align:top"> Description </td> 
 </tr> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px; border-top-style:solid; border-top-color:rgb(221,221,221); line-height:18px; vertical-align:top"> type </td> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; vertical-align:top"> - </td> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; vertical-align:top"> The component type name, needs to be&nbsp;irc </td> 
 </tr> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px; border-top-style:solid; border-top-color:rgb(221,221,221); line-height:18px; vertical-align:top"> hostname </td> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; vertical-align:top"> - </td> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; vertical-align:top"> The hostname or IP address to connect to </td> 
 </tr> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px; border-top-style:solid; border-top-color:rgb(221,221,221); line-height:18px; vertical-align:top"> port </td> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; vertical-align:top"> 6667 </td> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; vertical-align:top"> The port number of remote host to connect </td> 
 </tr> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px; border-top-style:solid; border-top-color:rgb(221,221,221); line-height:18px; vertical-align:top"> nick </td> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; vertical-align:top"> - </td> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; vertical-align:top"> Nick name </td> 
 </tr> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px; border-top-style:solid; border-top-color:rgb(221,221,221); line-height:18px; vertical-align:top"> user </td> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; vertical-align:top"> - </td> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; vertical-align:top"> User name </td> 
 </tr> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px; border-top-style:solid; border-top-color:rgb(221,221,221); line-height:18px; vertical-align:top"> password </td> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; vertical-align:top"> - </td> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; vertical-align:top"> User password </td> 
 </tr> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px; border-top-style:solid; border-top-color:rgb(221,221,221); line-height:18px; vertical-align:top"> chan </td> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; vertical-align:top"> - </td> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; vertical-align:top"> channel </td> 
 </tr> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px; border-top-style:solid; border-top-color:rgb(221,221,221); line-height:18px; vertical-align:top"> name </td> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; vertical-align:top"> &nbsp; </td> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; vertical-align:top"> &nbsp; </td> 
 </tr> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px; border-top-style:solid; border-top-color:rgb(221,221,221); line-height:18px; vertical-align:top"> splitlines </td> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; vertical-align:top"> - </td> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; vertical-align:top"> (boolean) </td> 
 </tr> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px; border-top-style:solid; border-top-color:rgb(221,221,221); line-height:18px; vertical-align:top"> splitchars </td> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; vertical-align:top"> \n </td> 
 <td style="font-size:13px; font-family:inherit; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; vertical-align:top"> line separator (if you were to enter the default value into the config file, the you would need to escape the backslash, like this: \\n) 
 <div> 
 
 </div> </td> 
 </tr> 
 </tbody> 
</table>

File Role

Null

自定义Sink

自定义接收器是你自己的Sink接口实现。自定义Sink和它的依赖必须包含在代理中的classpath。自定义Sink的类型是其FQCN。

Flume通道

通道是一个仓库，事件存储在上面。源通过通道添加事件，接收器通过通道取事件。

内存通道

事件存储在一个可配置的最大尺寸在内存中的队列。适用场景：需要更高的吞吐量，代理出现故障后数据丢失的情况。

JDBC通道

事件存储在数据库。目前的JDBC通道支持嵌入式Derby。这是一个持久的理想的地方，可恢复是很主要的特性。

<table style="color:rgb(64,64,64); margin:0px 0px 18px; padding:0px; border:1px solid rgb(221,221,221); font-size:13px; line-height:1; font-family:inherit; border-spacing:0px; width:1381px"> 
 <tbody> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border:0px; line-height:18px; font-family:inherit; vertical-align:top"> Property Name </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:0px 0px 0px 1px; border-left-style:solid; border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> Default </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:0px 0px 0px 1px; border-left-style:solid; border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> Description </td> 
 </tr> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px; border-top-style:solid; border-top-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> type </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> - </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> The component type name, needs to be&nbsp;jdbc </td> 
 </tr> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px; border-top-style:solid; border-top-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> db.type </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> DERBY </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> Database vendor, needs to be DERBY. </td> 
 </tr> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px; border-top-style:solid; border-top-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> driver.class </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> org.apache.derby.jdbc.EmbeddedDriver </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> Class for vendors JDBC driver </td> 
 </tr> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px; border-top-style:solid; border-top-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> driver.url </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> (constructed from other properties) </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> JDBC connection URL </td> 
 </tr> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px; border-top-style:solid; border-top-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> db.username </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> sa </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> User id for db connection </td> 
 </tr> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px; border-top-style:solid; border-top-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> db.password </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> password for db connection </td> 
 </tr> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px; border-top-style:solid; border-top-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> connection.properties.file </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> - </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> JDBC Connection property file path </td> 
 </tr> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px; border-top-style:solid; border-top-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> create.schema </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> true </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> If true, then creates db schema if not there </td> 
 </tr> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px; border-top-style:solid; border-top-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> create.index </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> true </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> Create indexes to speed up lookups </td> 
 </tr> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px; border-top-style:solid; border-top-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> create.foreignkey </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> true </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> </td> 
 </tr> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px; border-top-style:solid; border-top-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> transaction.isolation </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> READ_COMMITTED </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> Isolation level for db session READ_UNCOMMITTED, &nbsp;READ_COMMITTED, SERIALIZABLE, REPEATABLE_READ </td> 
 </tr> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px; border-top-style:solid; border-top-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> maximum.connections </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> 10 </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> Max connections allowed to db </td> 
 </tr> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px; border-top-style:solid; border-top-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> maximum.capacity </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> 0 (unlimited) </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> Max number of events in the channel </td> 
 </tr> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px; border-top-style:solid; border-top-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> sysprop.* </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> DB Vendor specific properties </td> 
 </tr> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px; border-top-style:solid; border-top-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> sysprop.user.home </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> Home path to store embedded Derby database </td> 
 </tr> 
 </tbody> 
</table>

可恢复内存通道

<table style="margin:0px 0px 18px; padding:0px; border:1px solid rgb(221,221,221); font-size:13px; line-height:1; font-family:inherit; border-spacing:0px; width:1381px"> 
 <tbody> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border:0px; line-height:18px; font-family:inherit; vertical-align:top"> Property Name </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:0px 0px 0px 1px; border-left-style:solid; border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> Default </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:0px 0px 0px 1px; border-left-style:solid; border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> Description </td> 
 </tr> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px; border-top-style:solid; border-top-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> type </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> - </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> The component type name, needs to be&nbsp;org.apache.flume.channel.recoverable.memory.RecoverableMemoryChannel </td> 
 </tr> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px; border-top-style:solid; border-top-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> wal.dataDir </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> (${user.home}/.flume/recoverable-memory-channel </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> &nbsp; </td> 
 </tr> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px; border-top-style:solid; border-top-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> wal.rollSize </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> (0x04000000) </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> Max size (in bytes) of a single file before we roll </td> 
 </tr> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px; border-top-style:solid; border-top-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> wal.minRetentionPeriod </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> 300000 </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> Min amount of time (in millis) to keep a log </td> 
 </tr> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px; border-top-style:solid; border-top-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> wal.workerInterval </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> 60000 </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> How often (in millis) the background worker checks for old logs </td> 
 </tr> 
 <tr style="margin:0px; padding:0px; border:0px; line-height:1; font-family:inherit"> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px; border-top-style:solid; border-top-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> wal.maxLogsSize </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> (0x20000000) </td> 
 <td style="font-size:13px; margin:0px; padding:10px 10px 9px; border-width:1px 0px 0px 1px; border-top-style:solid; border-left-style:solid; border-top-color:rgb(221,221,221); border-left-color:rgb(221,221,221); line-height:18px; font-family:inherit; vertical-align:top"> Total amt (in bytes) of logs to keep, excluding the current log </td> 
 </tr> 
 </tbody> 
</table>

文件通道

NOTE: 目前还不可用

伪事务通道

备注: 仅仅用来测试目的，不是在生产环境中使用。

[icon_star.png]: /images/20220810/50c735f3a7c749fda32408771b7ffe8f.png