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Posted to hdfs-issues@hadoop.apache.org by "SammiChen (JIRA)" <ji...@apache.org> on 2017/09/05 09:19:00 UTC
[jira] [Assigned] (HDFS-12394) Erasure coding policy cell size
should not be greater than file block size
[ https://issues.apache.org/jira/browse/HDFS-12394?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
SammiChen reassigned HDFS-12394:
--------------------------------
Assignee: Wei Zhou
> Erasure coding policy cell size should not be greater than file block size
> --------------------------------------------------------------------------
>
> Key: HDFS-12394
> URL: https://issues.apache.org/jira/browse/HDFS-12394
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: erasure-coding
> Affects Versions: 3.0.0-alpha4
> Reporter: SammiChen
> Assignee: Wei Zhou
> Labels: hdfs-ec-3.0-nice-to-have
>
> Current the minimum block size is defined by "dfs.namenode.fs-limits.min-block-size" with default value 1MB. Default block size is defined by "dfs.blocksize" with default value 128MB. Maximum erasure coding policy cell size is defined by "dfs.namenode.ec.policies.max.cellsize" with default value 4MB. We need to make sure the erasure coding policy cell size should not be greater than file block size. Otherwise file read/write will fail.
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