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Lars Hofhansl commented on HBASE-6427: -------------------------------------- Re: Ted's last comment. So you want to enforce that only a single coprocessor can implement these hooks? I would disagree with that. The chaining is fine (if complicated), no need to mandate what an implementer can and cannot do (see my previous comment). > Pluggable compaction policies via coprocessors > ---------------------------------------------- > > Key: HBASE-6427 > URL: https://issues.apache.org/jira/browse/HBASE-6427 > Project: HBase > Issue Type: New Feature > Reporter: Lars Hofhansl > Assignee: Lars Hofhansl > Priority: Minor > Attachments: 6427-notReady.txt, 6427-v1.txt, 6427-v2.txt, > 6427-v3.txt, 6427-v4.txt, 6427-v5.txt, 6427-v7.txt > > > When implementing higher level stores on top of HBase it is necessary to > allow dynamic control over how long KVs must be kept around. > Semi-static config options for ColumnFamilies (# of version or TTL) is not > sufficient. > This can be done with a few additional coprocessor hooks, or by makeing > Store.ScanInfo pluggable. > Was: > The simplest way to achieve this is to have a pluggable class to determine > the smallestReadpoint for Region. That way outside code can control what KVs > to retain. -- 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