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https://issues.apache.org/jira/browse/HDFS-1826?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13025953#comment-13025953
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Hairong Kuang commented on HDFS-1826:
-------------------------------------
+1. The patch looks good. I would prefer to have less try-catch blocks for
handling exceptions. But this is minor.
> NameNode should save image to name directories in parallel during upgrade
> -------------------------------------------------------------------------
>
> Key: HDFS-1826
> URL: https://issues.apache.org/jira/browse/HDFS-1826
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Affects Versions: 0.23.0
> Reporter: Hairong Kuang
> Assignee: Matt Foley
> Fix For: 0.23.0
>
> Attachments: 1826_FSImageWrite_concur_upgrade_v1.patch
>
>
> Currently namenode saves a new image to all its name directories in sequence
> during upgrade. We should make it to do in parallel to speedup namenode
> upgrade. Also it should not save its image to edits directories.
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