You are viewing a plain text version of this content. The canonical link for it is here.
Posted to hdfs-dev@hadoop.apache.org by "Tsz Wo (Nicholas), SZE (JIRA)" <ji...@apache.org> on 2014/01/31 04:22:11 UTC
[jira] [Resolved] (HDFS-5754) Split LayoutVerion into
NamenodeLayoutVersion and DatanodeLayoutVersion
[ https://issues.apache.org/jira/browse/HDFS-5754?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Tsz Wo (Nicholas), SZE resolved HDFS-5754.
------------------------------------------
Resolution: Fixed
Fix Version/s: HDFS-5535 (Rolling upgrades)
I have committed this. Thanks, Brandon!
> Split LayoutVerion into NamenodeLayoutVersion and DatanodeLayoutVersion
> ------------------------------------------------------------------------
>
> Key: HDFS-5754
> URL: https://issues.apache.org/jira/browse/HDFS-5754
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode, namenode
> Reporter: Tsz Wo (Nicholas), SZE
> Assignee: Brandon Li
> Fix For: HDFS-5535 (Rolling upgrades)
>
> Attachments: FeatureInfo.patch, HDFS-5754.001.patch, HDFS-5754.002.patch, HDFS-5754.003.patch, HDFS-5754.004.patch, HDFS-5754.006.patch, HDFS-5754.007.patch, HDFS-5754.008.patch, HDFS-5754.009.patch, HDFS-5754.010.patch, HDFS-5754.012.patch, HDFS-5754.013.patch
>
>
> Currently, LayoutVersion defines the on-disk data format and supported features of the entire cluster including NN and DNs. LayoutVersion is persisted in both NN and DNs. When a NN/DN starts up, it checks its supported LayoutVersion against the on-disk LayoutVersion. Also, a DN with a different LayoutVersion than NN cannot register with the NN.
> We propose to split LayoutVersion into two independent values that are local to the nodes:
> - NamenodeLayoutVersion - defines the on-disk data format in NN, including the format of FSImage, editlog and the directory structure.
> - DatanodeLayoutVersion - defines the on-disk data format in DN, including the format of block data file, metadata file, block pool layout, and the directory structure.
> The LayoutVersion check will be removed in DN registration. If NamenodeLayoutVersion or DatanodeLayoutVersion is changed in a rolling upgrade, then only rollback is supported and downgrade is not.
--
This message was sent by Atlassian JIRA
(v6.1.5#6160)