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https://issues.apache.org/jira/browse/HBASE-15181?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15160244#comment-15160244
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Anoop Sam John commented on HBASE-15181:
----------------------------------------
Exclusion of large files wont exclude in btw files. We see a large file we
break there.
{code}
private ArrayList<StoreFile> skipLargeFiles(ArrayList<StoreFile> candidates,
boolean mayUseOffpeak) {
int pos = 0;
while (pos < candidates.size() && !candidates.get(pos).isReference()
&& (candidates.get(pos).getReader().length() >
comConf.getMaxCompactSize(mayUseOffpeak))) {
++pos;
}
if (pos > 0) {
LOG.debug("Some files are too large. Excluding " + pos
+ " files from compaction candidates");
candidates.subList(0, pos).clear();
}
return candidates;
}
{code}
Bulk load exclude excludes in btw bulk loaded files.
> 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, 1.3.0, 0.98.19
>
> 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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