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https://issues.apache.org/jira/browse/HBASE-16841?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jingcheng Du updated HBASE-16841:
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Description:
When taking a snapshot on a enabled mob table, each region flushes itself and
takes a snapshot, and the mob snapshot is taken only if the current region is
first region of the table. At that time, the flushing of some regions might not
be finished, and some mob files are not flushed to disk yet. Eventually some
mob files are not recorded in the snapshot manifest.
To solve this, we need to generate a mob manifest for each region server after
the snapshot of all online regions in that server are finished, and merge them
in master when all the snapshots of regions are finished at last.
was:
When taking a snapshot on a enabled mob table, a region flushes itself and
takes a snapshot, and the mob snapshot is taken if it is first region of the
table. At that time, the flushing of some regions might not be finished, and
some mob files are not flushed to disk yet. Eventually some mob files are not
existent in the snapshot manifest.
We need to have a mob manifest for each region server after the snapshot of all
online regions in that server are finished, and merge them in master when all
the snapshots of regions are finished at last.
> Data loss in MOB files after cloning a snapshot and deleting that snapshot
> --------------------------------------------------------------------------
>
> Key: HBASE-16841
> URL: https://issues.apache.org/jira/browse/HBASE-16841
> Project: HBase
> Issue Type: Bug
> Components: mob, snapshots
> Reporter: Jingcheng Du
> Assignee: Jingcheng Du
>
> When taking a snapshot on a enabled mob table, each region flushes itself and
> takes a snapshot, and the mob snapshot is taken only if the current region is
> first region of the table. At that time, the flushing of some regions might
> not be finished, and some mob files are not flushed to disk yet. Eventually
> some mob files are not recorded in the snapshot manifest.
> To solve this, we need to generate a mob manifest for each region server
> after the snapshot of all online regions in that server are finished, and
> merge them in master when all the snapshots of regions are finished at last.
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