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https://issues.apache.org/jira/browse/HBASE-14135?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15510810#comment-15510810
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Vladimir Rodionov commented on HBASE-14135:
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Two issues with incremental backup implementation:
# Storage usage. WAL files are significantly larger than hfiles, especially
when compression is enabled in hfiles
# Restore operation time.
The most significant is the first one. We can that storage reduction factor
will be something between 3-5 once convert (merge) is implemented.
Running conversion (merge) on a remote destination (cluster) is not feasible in
many cases, so merge will require reading/writing data back and forth between
source and destination.
I will postpone this feature until filtering at the source during incremental
backup is done.
> HBase Backup/Restore Phase 3: Merge backup images
> -------------------------------------------------
>
> Key: HBASE-14135
> URL: https://issues.apache.org/jira/browse/HBASE-14135
> Project: HBase
> Issue Type: New Feature
> Affects Versions: 2.0.0
> Reporter: Vladimir Rodionov
> Assignee: Vladimir Rodionov
> Labels: backup
> Fix For: 2.0.0
>
>
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