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Lars Hofhansl commented on HBASE-6428: -------------------------------------- Just looked at the current compaction code. At the very least the Store.completeCompaction and Store.createWriterInTmp need to be made public. In addition Store.completeCompaction has accept Collection<StoreFile.Writer> instead of just a single StoreFile.Writer. Need to dig a bit deeper, but these changes should allow a coprocessor to take over compactions, write a new set of store files (maybe leveled, or time based) and hook these new HFiles up with HBase. > Pluggable Compaction policies > ----------------------------- > > Key: HBASE-6428 > URL: https://issues.apache.org/jira/browse/HBASE-6428 > Project: HBase > Issue Type: New Feature > Reporter: Lars Hofhansl > > For some usecases is useful to allow more control over how KVs get compacted. > For example one could envision storing old versions of a KV separate HFiles, > which then rarely have to be touched/cached by queries querying for new data. > In addition these date ranged HFile can be easily used for backups while > maintaining historical data. > This would be a major change, allowing compactions to provide multiple > targets (not just a filter). -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira