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Type:
Improvement
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Status: Closed
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Priority:
Major
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Resolution: Fixed
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Affects Version/s: None
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Fix Version/s: 2.1.0-beta
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Component/s: None
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Labels:None
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Hadoop Flags:Reviewed
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Release Note:The default blocks size prior to this change was 64MB. This jira changes the default block size to 128MB. To go back to previous behavior, please configure the in hdfs-site.xml, the configuration parameter "dfs.blocksize" to 67108864.
The default HDFS block size (dfs.blocksize) has been 64mb forever. 128mb works well in practice on today's hardware configurations, most clusters I work with use it or higher (eg 256mb). Let's bump to 128mb in trunk for v3.