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https://issues.apache.org/jira/browse/HBASE-14417?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15453160#comment-15453160
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Ted Yu commented on HBASE-14417:
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HFile references would stay, assisted by BackupHFileCleaner.
Please read the earlier comments.
Suppose there're two backup sets involving common table(s). The bulk loaded
hfiles for the common table should be shared by the two backups.
> Incremental backup and bulk loading
> -----------------------------------
>
> Key: HBASE-14417
> URL: https://issues.apache.org/jira/browse/HBASE-14417
> Project: HBase
> Issue Type: New Feature
> Affects Versions: 2.0.0
> Reporter: Vladimir Rodionov
> Assignee: Vladimir Rodionov
> Priority: Critical
> Labels: backup
> Fix For: 2.0.0
>
>
> Currently, incremental backup is based on WAL files. Bulk data loading
> bypasses WALs for obvious reasons, breaking incremental backups. The only way
> to continue backups after bulk loading is to create new full backup of a
> table. This may not be feasible for customers who do bulk loading regularly
> (say, every day).
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