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Tsz Wo (Nicholas), SZE commented on HADOOP-6467: ------------------------------------------------ It is better: ~35mins. - WordCount on har files with the patch {noformat} -bash-3.1$ date; time $H ${WC_CMD} ${HAR_FULL}/${DIR} ${TT_WC}2 Sun Feb 14 00:18:08 UTC 2010 10/02/14 00:18:22 INFO input.FileInputFormat: Total input paths to process : 100000 ... 10/02/14 00:46:52 INFO mapred.JobClient: Running job: job_201002042035_33691 10/02/14 00:46:53 INFO mapred.JobClient: map 0% reduce 0% ... 10/02/14 00:53:22 INFO mapred.JobClient: map 100% reduce 100% 10/02/14 00:53:28 INFO mapred.JobClient: Job complete: job_201002042035_33691 ... 10/02/14 00:53:29 INFO mapred.JobClient: Reduce input records=16665 real 35m21.704s user 11m46.324s sys 2m34.337s {noformat} > Performance improvement for liststatus on directories in hadoop archives. > ------------------------------------------------------------------------- > > Key: HADOOP-6467 > URL: https://issues.apache.org/jira/browse/HADOOP-6467 > Project: Hadoop Common > Issue Type: Improvement > Reporter: Mahadev konar > Assignee: Mahadev konar > Fix For: 0.22.0 > > Attachments: Archives_performance.docx, Archives_performance.docx, > HADOOP-6467.patch > > > A liststatus call on a directory in hadoop archives leads to ( 2* number of > files in directory) open calls to the namenode. This is very sub optimal and > needs to be fixed to make it performant enough to be used on a daily basis. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.