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https://issues.apache.org/jira/browse/HDFS-2731?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eli Collins updated HDFS-2731:
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Description: To setup a SBN we currently format the primary then manually
copy the name dirs to the SBN. The SBN should do this automatically.
Specifically, on NN startup, if HA with a shared edits dir is configured and
populated, if the SBN has empty name dirs it should downloads the image and log
from the primary (as an optimization it could copy the logs from the shared
dir). If the other NN is still in standby then it should fail to start as it
does currently. (was: To setup a SBN we currently format the primary then
manually copy the name dirs to the SBN. The SBN should do this automatically.
Specifically, on NN startup, if HA with a shared edits dir is configured and
populated, if the SBN has empty name dirs it should downloads the image and log
from the primary (as an optimization it could copy the logs from the shared
dir). If the other NN is still in standby then it should fails to start as it
does currently.)
> Autopopulate standby name dirs if they're empty
> -----------------------------------------------
>
> Key: HDFS-2731
> URL: https://issues.apache.org/jira/browse/HDFS-2731
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: ha
> Affects Versions: HA branch (HDFS-1623)
> Reporter: Eli Collins
> Assignee: Eli Collins
>
> To setup a SBN we currently format the primary then manually copy the name
> dirs to the SBN. The SBN should do this automatically. Specifically, on NN
> startup, if HA with a shared edits dir is configured and populated, if the
> SBN has empty name dirs it should downloads the image and log from the
> primary (as an optimization it could copy the logs from the shared dir). If
> the other NN is still in standby then it should fail to start as it does
> currently.
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