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https://issues.apache.org/jira/browse/PHOENIX-5928?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kadir OZDEMIR updated PHOENIX-5928:
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Attachment: PHOENIX-5928.4.x.002.patch
> Index rebuilds without replaying data table mutations
> -----------------------------------------------------
>
> Key: PHOENIX-5928
> URL: https://issues.apache.org/jira/browse/PHOENIX-5928
> Project: Phoenix
> Issue Type: Improvement
> Affects Versions: 5.0.0, 4.14.3
> Reporter: Kadir OZDEMIR
> Assignee: Kadir OZDEMIR
> Priority: Major
> Attachments: PHOENIX-5928.4.x.001.patch, PHOENIX-5928.4.x.002.patch
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Index rebuilds are done currently by reading data table mutations (in
> UngroupedAggregateRegionObserver) and then replaying them on the data table
> (in IndexRegionObser) -- without actually applying mutations on the data
> table -- in order to generate the corresponding index mutations and apply
> them on index tables. IndexRegionObserver sets the operation status for these
> data table mutations to NOWRITE so that they are ignored by HBase after
> generating index table mutations from these data table mutations. Since we do
> not apply these mutations on the data table, there is no need to send these
> mutations to the data table regions if index mutations are generated and sent
> to index tables by UngroupedAggregateRegionObserver. By doing so, we
> eliminate going through data table update path and its overhead (its
> interaction with flushes, row locking etc).
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