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https://issues.apache.org/jira/browse/HBASE-15181?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15122082#comment-15122082
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Ted Yu commented on HBASE-15181:
--------------------------------
Is this in production ?
If so, can you share performance numbers ?
75 public static final String MAX_AGE = CONFIG_PREFIX +
"tiered.max.storefile.age";
76 public static final String TIME_UNIT = CONFIG_PREFIX +
"tiered.time.unit";
77 public static final String TIER_BASE = CONFIG_PREFIX +
"tiered.tier.base";
78 public static final String MIN_THRESHOLD = CONFIG_PREFIX +
"tiered.min.threshold";
Please add javadoc for the parameters above.
Normally such constants end with '_KEY'
TieredCompactionPolicy.java needs Apache license. Please add annotation for
audience and class javadoc.
Putting the next patch on review board would facilitate reviewing.
> 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
>
>
> 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.
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