I have a toy setup sending log4j messages to hdfs using flume. I'm not able to configure the hdfs sink to avoid many small files. I thought I could configure the hdfs sink to create a new file every-time the file size reaches 10mb, but it is still creating files around 1.5KB.
Here is my current flume config:
a1.sources=o1
a1.sinks=i1
a1.channels=c1
#source configuration
a1.sources.o1.type=avro
a1.sources.o1.bind=0.0.0.0
a1.sources.o1.port=41414
#sink config
a1.sinks.i1.type=hdfs
a1.sinks.i1.hdfs.path=hdfs://localhost:8020/user/myName/flume/events
#never roll-based on time
a1.sinks.i1.hdfs.rollInterval=0
#10MB=10485760
a1.sinks.il.hdfs.rollSize=10485760
#never roll base on number of events
a1.sinks.il.hdfs.rollCount=0
#channle config
a1.channels.c1.type=memory
a1.channels.c1.capacity=1000
a1.channels.c1.transactionCapacity=100
a1.sources.o1.channels=c1
a1.sinks.i1.channel=c1
It is your typo in conf.
#sink config
a1.sinks.i1.type=hdfs
a1.sinks.i1.hdfs.path=hdfs://localhost:8020/user/myName/flume/events
#never roll-based on time
a1.sinks.i1.hdfs.rollInterval=0
#10MB=10485760
a1.sinks.il.hdfs.rollSize=10485760
#never roll base on number of events
a1.sinks.il.hdfs.rollCount=0
where in the line 'rollSize' and 'rollCount', you put il as i1. Please try to use DEBUG, then you will find like:
[SinkRunner-PollingRunner-DefaultSinkProcessor] (org.apache.flume.sink.hdfs.BucketWriter.shouldRotate:465) - rolling: rollSize: 1024, bytes: 1024
Due to il, default value of rollSize 1024 is being used .