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Re: Extra 4 bytes at beginning of serialized file - Hadoop - [mail # user]
...Rather than calling key.write(out), use out.write(key.getBytes(), 0,   key.getLength()) in your OutputFormat. You'll need to specify that the   keytype is BytesWritable or BinaryCo...
   Author: Chris Douglas, 2009-08-12, 18:00
Re: Contributing a New FileSystem Implementation - Questions About Process - Hadoop - [mail # dev]
...n  This will not be committed to the 0.18 branch, even if there is an 0.18.4 release. If you wanted to post an 0.18 compatible patch on the same JIRA for reference, that's fine, but onl...
   Author: Chris Douglas, 2009-08-10, 23:37
Re: [VOTE] Back-port TFile to Hadoop 0.20 - Hadoop - [mail # dev]
...+1...
   Author: Chris Douglas, 2009-07-08, 01:06
Re: Mailing lists are broken? - Hadoop - [mail # general]
...It's mapreduce-dev@ -C  On Jul 2, 2009, at 10:21 AM, Jim Kellerman (POWERSET) wrote:  ...
   Author: Chris Douglas, 2009-07-02, 20:45
[expand - 1 more] - Re: Apache git mirrors, post project split - Hadoop - [mail # dev]
...If the repository has been cloned, are there any operations that require the remote? We could leave the old mirror there to be polled for updates- which it will never have- but I was under t...
   Author: Chris Douglas, 2009-06-29, 19:01
Re: How can I go ahead.... (RAgzip, HADOOP-4652). - Hadoop - [mail # dev]
...Hello-  Sorry for the delay in committing this patch. There was a longstanding    dependency on HADOOP-3020, an issue resolved only recently (explicitly    in suppor...
   Author: Chris Douglas, 2009-03-31, 21:19
[expand - 1 more] - Re: intermediate results not getting compressed - Hadoop - [mail # user]
...It should still be compressed, unless there's some bizarre regression.   More segments will be around simultaneously (since the segments not   yet merged are still on disk), which ...
   Author: Chris Douglas, 2009-03-17, 08:24
Re: Profiling Map/Reduce Tasks - Hadoop - [mail # user]
...I use YourKit (http://yourkit.com/).  You'll also want to look at the following parameters:     mapred.task.profile.params (e.g. -  agentlib:yjpagent=sampling=onexit=snap...
   Author: Chris Douglas, 2009-03-09, 18:14
[expand - 1 more] - Re: Reduce doesn't start until map finishes - Hadoop - [mail # user]
...The output of each map is sorted by partition and by key within that   partition. The reduce merges sorted map output assigned to its   partition into the reduce. The following may...
   Author: Chris Douglas, 2009-03-04, 04:27
Re: Limit number of records or total size in combiner input using  jobconf? - Hadoop - [mail # user]
...Approximately and indirectly, yes. You can limit the amount of memory   allocated to storing serialized records in memory (io.sort.mb) and the   percentage of that space reserved f...
   Author: Chris Douglas, 2009-02-20, 22:34
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB