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From Alexander Alten-Lorenz <wget.n...@gmail.com>
Subject Re: flume tail source problem and performance
Date Tue, 29 Jan 2013 07:29:52 GMT
Hi,

you could use tail -F, but this depends on the external source. Flume hasn't control about.
You can write your own script and include this.

What's the content of:
/tmp/flume/agent/agent*.*/ - directories? Are sent and sending clean?

- Alex

On Jan 29, 2013, at 8:24 AM, 周梦想 <ablozhou@gmail.com> wrote:

> hello,
> 1. I want to tail a log source and write it to hdfs. below is configure:
> config [ag1, tail("/home/zhouhh/game.log",startFromEnd=true),
> agentDFOSink("hadoop48",35853) ;]
> config [ag2, tail("/home/zhouhh/game.log",startFromEnd=true),
> agentDFOSink("hadoop48",35853) ;]
> config [co1, collectorSource( 35853 ),  [collectorSink(
> "hdfs://hadoop48:54310/user/flume/%y%m/%d","%{host}-",5000,raw),collectorSink(
> "hdfs://hadoop48:54310/user/flume/%y%m","%{host}-",10000,raw)]]
> 
> 
> I found if I restart the agent node, it will resend the content of game.log
> to collector. There are some solutions to send logs from where I haven't
> sent before? Or I have to make a mark myself or remove the logs manually
> when restart the agent node?
> 
> 2. I tested performance of flume, and found it's a bit slow.
> if I using configure as above, there are only 50MB/minute.
> I changed the configure to below:
> ag1:tail("/home/zhouhh/game.log",startFromEnd=true)|batch(1000) gzip
> agentDFOSink("hadoop48",35853);
> 
> config [co1, collectorSource( 35853 ), [collectorSink(
> "hdfs://hadoop48:54310/user/flume/%y%m/%d","%{host}-",5000,raw),collectorSink(
> "hdfs://hadoop48:54310/user/flume/%y%m","%{host}-",10000,raw)]]
> 
> I sent 300MB log, it will spent about 3 minutes, so it's about 100MB/minute.
> 
> while I send the log from ag1 to co1 via scp, It's about 30MB/second.
> 
> someone give me any ideas?
> 
> thanks!
> 
> Andy

--
Alexander Alten-Lorenz
http://mapredit.blogspot.com
German Hadoop LinkedIn Group: http://goo.gl/N8pCF


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