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Posted to issues@hbase.apache.org by "Andrew Purtell (JIRA)" <ji...@apache.org> on 2012/11/06 00:28:13 UTC
[jira] [Resolved] (HBASE-7099) create compaction hooks
[ https://issues.apache.org/jira/browse/HBASE-7099?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Andrew Purtell resolved HBASE-7099.
-----------------------------------
Resolution: Invalid
The existing preCompact hook allows skipping KVs and modifying the values of KVs.
Do this:
{code}
public preCompact(final ObserverContext<RegionCoprocessorEnvironment> c,
final Store store,
final InternalScanner scanner)
{
return new MyCustomInternalScanner(scanner);
}
{code}
Your custom InternalScanner therefore gets to inspect, drop, or change KVs from the wrapped scanner. It is your custom scanner that will be used during compaction.
> create compaction hooks
> ------------------------
>
> Key: HBASE-7099
> URL: https://issues.apache.org/jira/browse/HBASE-7099
> Project: HBase
> Issue Type: New Feature
> Reporter: Adela Maznikar
> Assignee: Adela Maznikar
>
> Create compaction hooks which should be used to modify the value of the KV during compaction. The possible modifications would include: skipping the KV, modifying the value of the KV in the desired format, leaving the value as it was.
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