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Flume >> mail # user >> Question about gzip compression when using Flume Ng


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Re: Question about gzip compression when using Flume Ng
Sagar,
You're better of downloading and unzipping CDH3u5 or CDH4 some where, and
pointing the HADOOP_HOME env. variable to the base directory.
That way you won't have to worry about which jar files are needed and which
not.
Flume will auto add all JARs from the Hadoop Installation that it needs.

regards
Bhaskar

On Mon, Jan 14, 2013 at 7:43 PM, Sagar Mehta <[EMAIL PROTECTED]> wrote:

> ok so I dropped in the new hadoop-core jar in /opt/flume/lib [I got some
> errors about the guava dependencies so put in that jar too]
>
> smehta@collector102:/opt/flume/lib$ ls -ltrh | grep -e "hadoop-core" -e
> "guava"
> -rw-r--r-- 1 hadoop hadoop 1.5M 2012-11-14 21:49 guava-10.0.1.jar
> -rw-r--r-- 1 hadoop hadoop 3.7M 2013-01-14 23:50
> hadoop-core-0.20.2-cdh3u5.jar
>
> Now I don't event see the file being created in hdfs and the flume log is
> happily talking about housekeeping for some file channel checkpoints,
> updating pointers et al
>
> Below is tail of flume log
>
> *hadoop@collector102:/data/flume_log$ tail -10 flume.log*
> 2013-01-15 00:42:10,814 [Log-BackgroundWorker-channel2] INFO
>  org.apache.flume.channel.file.Log - Updated checkpoint for file:
> /data/flume_data/channel2/data/log-36 position: 129415524 logWriteOrderID:
> 1358209947324
> 2013-01-15 00:42:10,814 [Log-BackgroundWorker-channel2] INFO
>  org.apache.flume.channel.file.LogFile - Closing RandomReader
> /data/flume_data/channel2/data/log-34
> 2013-01-15 00:42:10,814 [Log-BackgroundWorker-channel1] INFO
>  org.apache.flume.channel.file.Log - Updated checkpoint for file:
> /data/flume_data/channel1/data/log-36 position: 129415524 logWriteOrderID:
> 1358209947323
> 2013-01-15 00:42:10,814 [Log-BackgroundWorker-channel1] INFO
>  org.apache.flume.channel.file.LogFile - Closing RandomReader
> /data/flume_data/channel1/data/log-34
> 2013-01-15 00:42:10,819 [Log-BackgroundWorker-channel2] INFO
>  org.apache.flume.channel.file.LogFileV3 - Updating log-34.meta
> currentPosition = 18577138, logWriteOrderID = 1358209947324
> 2013-01-15 00:42:10,819 [Log-BackgroundWorker-channel1] INFO
>  org.apache.flume.channel.file.LogFileV3 - Updating log-34.meta
> currentPosition = 18577138, logWriteOrderID = 1358209947323
> 2013-01-15 00:42:10,820 [Log-BackgroundWorker-channel1] INFO
>  org.apache.flume.channel.file.LogFile - Closing RandomReader
> /data/flume_data/channel1/data/log-35
> 2013-01-15 00:42:10,821 [Log-BackgroundWorker-channel2] INFO
>  org.apache.flume.channel.file.LogFile - Closing RandomReader
> /data/flume_data/channel2/data/log-35
> 2013-01-15 00:42:10,826 [Log-BackgroundWorker-channel1] INFO
>  org.apache.flume.channel.file.LogFileV3 - Updating log-35.meta
> currentPosition = 217919486, logWriteOrderID = 1358209947323
> 2013-01-15 00:42:10,826 [Log-BackgroundWorker-channel2] INFO
>  org.apache.flume.channel.file.LogFileV3 - Updating log-35.meta
> currentPosition = 217919486, logWriteOrderID = 1358209947324
>
> Sagar
>
>
> On Mon, Jan 14, 2013 at 3:38 PM, Brock Noland <[EMAIL PROTECTED]> wrote:
>
>> Hmm, could you try and updated version of Hadoop? CDH3u2 is quite old,
>> I would upgrade to CDH3u5 or CDH 4.1.2.
>>
>> On Mon, Jan 14, 2013 at 3:27 PM, Sagar Mehta <[EMAIL PROTECTED]>
>> wrote:
>> > About the bz2 suggestion, we have a ton of downstream jobs that assume
>> gzip
>> > compressed files - so it is better to stick to gzip.
>> >
>> > The plan B for us is to have a Oozie step to gzip compress the logs
>> before
>> > proceeding with downstream Hadoop jobs - but that looks like a hack to
>> me!!
>> >
>> > Sagar
>> >
>> >
>> > On Mon, Jan 14, 2013 at 3:24 PM, Sagar Mehta <[EMAIL PROTECTED]>
>> wrote:
>> >>
>> >> hadoop@jobtracker301:/home/hadoop/sagar/debug$ zcat
>> >> collector102.ngpipes.sac.ngmoco.com.1358204406896.gz | wc -l
>> >>
>> >> gzip: collector102.ngpipes.sac.ngmoco.com.1358204406896.gz:
>> decompression
>> >> OK, trailing garbage ignored
>> >> 100
>> >>
>> >> This should be about 50,000 events for the 5 min window!!
>> >>
>> >> Sagar
>> >>
>> >> On Mon, Jan 14, 2013 at 3:16 PM, Brock Noland <[EMAIL PROTECTED]>