Alexey Lef created LUCENE-4323:
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Summary: Add max cfs segment size to LogMergePolicy and
TieredMergePolicy
Key: LUCENE-4323
URL: https://issues.apache.org/jira/browse/LUCENE-4323
Project: Lucene - Core
Issue Type: Improvement
Components: core/index
Affects Versions: 4.0-BETA
Reporter: Alexey Lef
Priority: Minor
Our application is managing thousands of indexes ranging from a few KB to a few
GB in size. To keep the number of files under control and at the same time
avoid the overhead of compound file format for large segments, we would like to
keep only small segments as CFS. The meaning of "small" here is in absolute
byte size terms, not as a percentage of the overall index. It is ok and in fact
desirable to have the entire index as CFS as long as it is below the threshold.
The attached patch adds a new configuration option maxCFSSegmentSize which sets
the absolute limit on the compound file segment size, in addition to the
existing noCFSRatio, i.e. the lesser of the two will be used. The default is to
allow any size (Long.MAX_VALUE) so that the default behavior is exactly as it
was before.
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