[
https://issues.apache.org/jira/browse/HDFS-1910?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13180991#comment-13180991
]
Jakob Homan commented on HDFS-1910:
-----------------------------------
bq. The error clearly isn't all that obvious, given that this bug existed for
quite a while without being noticed/fixed.
Not really. Something being done twice is easier to overlook than something
not being done. Assuming the second time overwrites the first, you end up with
what you expect: one copy of the fsimage.
> when dfs.name.dir and dfs.name.edits.dir are same fsimage will be saved twice
> every time
> ----------------------------------------------------------------------------------------
>
> Key: HDFS-1910
> URL: https://issues.apache.org/jira/browse/HDFS-1910
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: name-node
> Affects Versions: 0.21.0
> Reporter: Gokul
> Priority: Minor
> Labels: critical-0.22.0
> Fix For: 0.22.1
>
> Attachments: saveImageOnce-v0.22.patch
>
>
> when image and edits dir are configured same, the fsimage flushing from
> memory to disk will be done twice whenever saveNamespace is done. this may
> impact the performance of backupnode/snn where it does a saveNamespace during
> every checkpointing time.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
