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https://issues.apache.org/jira/browse/HBASE-15181?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15127610#comment-15127610
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Enis Soztutar commented on HBASE-15181:
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bq. Ok keep the sequenceid around always Enis Soztutar.. .then we could do
non-contiguous compactions and respect order in which edits were added.
Yes. I think the mvcc unification made this 2 weeks, then Lars made it to be 1
day or so because of extra overhead. Bad thing is that we do not want to keep 2
8-byte objects (ts and seqId) per cell. Time to unify seqId with ts.
Is this needed? We already do the CompoundConfig in HStore from
{{family.getConfiguration()}}.
{code}
+ this.conf = new CompoundConfiguration().add(conf)
+ .addBytesMap(storeConfigInfo.getHColumnDescriptor().getValues());
{code}
Can you also put up the patch at RB. it would be easier that way.
> A simple implementation of date based tiered compaction
> -------------------------------------------------------
>
> Key: HBASE-15181
> URL: https://issues.apache.org/jira/browse/HBASE-15181
> Project: HBase
> Issue Type: New Feature
> Components: Compaction
> Reporter: Clara Xiong
> Assignee: Clara Xiong
> Fix For: 2.0.0
>
> Attachments: HBASE-15181-v1.patch, HBASE-15181-v2.patch
>
>
> This is a simple implementation of date-based tiered compaction similar to
> Cassandra's for the following benefits:
> 1. Improve date-range-based scan by structuring store files in date-based
> tiered layout.
> 2. Reduce compaction overhead.
> 3. Improve TTL efficiency.
> Perfect fit for the use cases that:
> 1. has mostly date-based date write and scan and a focus on the most recent
> data.
> 2. never or rarely deletes data.
> Out-of-order writes are handled gracefully so the data will still get to the
> right store file for time-range-scan and re-compacton with existing store
> file in the same time window is handled by ExploringCompactionPolicy.
> Time range overlapping among store files is tolerated and the performance
> impact is minimized.
> Configuration can be set at hbase-site or overriden at per-table or
> per-column-famly level by hbase shell.
> Design spec is at
> https://docs.google.com/document/d/1_AmlNb2N8Us1xICsTeGDLKIqL6T-oHoRLZ323MG_uy8/edit?usp=sharing
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