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Posted to mapreduce-issues@hadoop.apache.org by "Vinod Kumar Vavilapalli (Updated) (JIRA)" <ji...@apache.org> on 2011/12/16 00:13:31 UTC
[jira] [Updated] (MAPREDUCE-3524) Scan benchmark is more than 1.5x
slower in 0.23
[ https://issues.apache.org/jira/browse/MAPREDUCE-3524?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Vinod Kumar Vavilapalli updated MAPREDUCE-3524:
-----------------------------------------------
Component/s: performance
mr-am
benchmarks
Description:
Scan benchmark is more than 1.5X slower(almost 92% increased) in 0.23 than Hadoop-0.20.204 on 350 nodes size cluster.
was:
Scan runtime is more than 1.5X slower(almost 92% increased) in 0.23 than Hadoop-0.20.204 on 350 nodes size cluster.
Summary: Scan benchmark is more than 1.5x slower in 0.23 (was: Scan runtime is more than 1.5x slower in 0.23)
I should've edited the title before itself. Scan is one of the mapreduce benchmarks. It is same as the main loaden benchmark with specific settings. (See GenericMRLoadGenerator.java). Scan is to measure the job runtime for simply generating random data and reading+emitting the key-values (only maps, no reduces).
> Scan benchmark is more than 1.5x slower in 0.23
> -----------------------------------------------
>
> Key: MAPREDUCE-3524
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-3524
> Project: Hadoop Map/Reduce
> Issue Type: Sub-task
> Components: benchmarks, mr-am, mrv2, performance
> Affects Versions: 0.23.1
> Reporter: Karam Singh
> Assignee: Vinod Kumar Vavilapalli
> Priority: Blocker
>
> Scan benchmark is more than 1.5X slower(almost 92% increased) in 0.23 than Hadoop-0.20.204 on 350 nodes size cluster.
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