Created
June 7, 2012 20:31
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| http://www.cloudera.com/blog/2009/03/configuration-parameters-what-can-you-just-ignore/ | |
| - block size | |
| - open files limit | |
| - epoll limit | |
| - io.sort.mb (io.sort.factor?) | |
| - io.file.buffer.size (65536?) | |
| - dfs.namenode.handler, mapred.job.tracker.handler.count | |
| - dfs.datanode.handler.count | |
| - mapred.child.ulimit, mapred.child.java.opts | |
| http://www.cloudera.com/blog/2009/12/7-tips-for-improving-mapreduce-performance/ | |
| - mapred.compress.map.output | |
| - LZO compression: http://www.cloudera.com/blog/2009/11/hadoop-at-twitter-part-1-splittable-lzo-compression/ | |
| This will only work if the input is already LZO compressed - annoying for benchmarking | |
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