2013-08-28 19:24:34 -04:00
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[[index-modules]]
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= Index Modules
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[partintro]
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--
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Index Modules are modules created per index and control all aspects
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related to an index. Since those modules lifecycle are tied to an index,
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all the relevant modules settings can be provided when creating an index
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(and it is actually the recommended way to configure an index).
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[float]
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2013-09-30 17:32:00 -04:00
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[[index-modules-settings]]
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2013-08-28 19:24:34 -04:00
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== Index Settings
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There are specific index level settings that are not associated with any
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specific module. These include:
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2013-10-15 07:30:56 -04:00
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[[index-compound-format]]`index.compound_format`::
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2013-10-15 07:30:56 -04:00
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Should the compound file format be used (boolean setting).
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The compound format was created to reduce the number of open
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file handles when using file based storage. However, by default it is set
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to `false` as the non-compound format gives better performance. It is important
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that OS is configured to give Elasticsearch ``enough'' file handles.
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See <<file-descriptors>>.
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+
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Alternatively, `compound_format` can be set to a number between `0` and
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`1`, where `0` means `false`, `1` means `true` and a number inbetween
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represents a percentage: if the merged segment is less than this
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percentage of the total index, then it is written in compound format,
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otherwise it is written in non-compound format. added[0.90.2]
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2013-10-15 07:30:56 -04:00
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[[index-compound-on-flush]]`index.compound_on_flush`::
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Should a new segment (create by indexing, not by merging) be written
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in compound format or non-compound format? Defaults to `true`.
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This is a dynamic setting.
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2013-08-28 19:24:34 -04:00
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`index.refresh_interval`::
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A time setting controlling how often the
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refresh operation will be executed. Defaults to `1s`. Can be set to `-1`
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in order to disable it.
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--
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include::index-modules/analysis.asciidoc[]
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include::index-modules/allocation.asciidoc[]
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include::index-modules/slowlog.asciidoc[]
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include::index-modules/merge.asciidoc[]
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include::index-modules/store.asciidoc[]
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include::index-modules/mapper.asciidoc[]
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include::index-modules/translog.asciidoc[]
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include::index-modules/cache.asciidoc[]
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include::index-modules/fielddata.asciidoc[]
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include::index-modules/codec.asciidoc[]
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include::index-modules/similarity.asciidoc[]
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