flume知识点总结

1.flume作用：从各种各样的数据源采集数据（读数据，缓存数据，写数据）到各种各样的文件系统中，如kafka

2.flume的采集程序:agent(包括source组件，channel组件，sink组件）

3.flume基本配置：（dir）

#定义三大组件的名称
ag1.sources = source1
ag1.sinks = sink1
ag1.channels = channel1

# 配置source组件
ag1.sources.source1.type = spooldir
ag1.sources.source1.spoolDir = /root/log/
ag1.sources.source1.fileSuffix=.FINISHED
ag1.sources.source1.deserializer.maxLineLength=5120

# 配置sink组件
ag1.sinks.sink1.type = hdfs
ag1.sinks.sink1.hdfs.path =hdfs://hdp-01:9000/access_log/%y-%m-%d/%H-%M
ag1.sinks.sink1.hdfs.filePrefix = app_log
ag1.sinks.sink1.hdfs.fileSuffix = .log
ag1.sinks.sink1.hdfs.batchSize= 100
ag1.sinks.sink1.hdfs.fileType = DataStream
ag1.sinks.sink1.hdfs.writeFormat =Text

## roll：滚动切换：控制写文件的切换规则
ag1.sinks.sink1.hdfs.rollSize = 512000 ## 按文件体积（字节）来切 
ag1.sinks.sink1.hdfs.rollCount = 1000000 ## 按event条数切
ag1.sinks.sink1.hdfs.rollInterval = 60 ## 按时间间隔切换文件

## 控制生成目录的规则
ag1.sinks.sink1.hdfs.round = true
ag1.sinks.sink1.hdfs.roundValue = 10
ag1.sinks.sink1.hdfs.roundUnit = minute

ag1.sinks.sink1.hdfs.useLocalTimeStamp = true

# channel组件配置
ag1.channels.channel1.type = memory
ag1.channels.channel1.capacity = 500000 ## event条数
ag1.channels.channel1.transactionCapacity = 600 ##flume事务控制所需要的缓存容量600条event

# 绑定source、channel和sink之间的连接
ag1.sources.source1.channels = channel1
ag1.sinks.sink1.channel = channel1