150 lines
4.1 KiB
Plaintext
150 lines
4.1 KiB
Plaintext
[[indices-warmers]]
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== Warmers
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Index warming allows to run registered search requests to warm up the
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index before it is available for search. With the near real time aspect
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of search, cold data (segments) will be warmed up before they become
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available for search.
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Warmup searches typically include requests that require heavy loading of
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data, such as faceting or sorting on specific fields. The warmup APIs
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allows to register warmup (search) under specific names, remove them,
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and get them.
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Index warmup can be disabled by setting `index.warmer.enabled` to
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`false`. It is supported as a realtime setting using update settings
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API. This can be handy when doing initial bulk indexing, disabling pre
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registered warmers to make indexing faster and less expensive and then
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enable it.
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[float]
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=== Index Creation / Templates
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Warmers can be registered when an index gets created, for example:
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[source,js]
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--------------------------------------------------
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curl -XPUT localhost:9200/test -d '{
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"warmers" : {
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"warmer_1" : {
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"types" : [],
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"source" : {
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"query" : {
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...
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},
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"facets" : {
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...
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}
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}
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}
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}
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}'
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--------------------------------------------------
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Or, in an index template:
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[source,js]
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--------------------------------------------------
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curl -XPUT localhost:9200/_template/template_1 -d '
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{
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"template" : "te*",
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"warmers" : {
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"warmer_1" : {
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"types" : [],
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"source" : {
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"query" : {
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...
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},
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"facets" : {
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...
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}
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}
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}
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}
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}'
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--------------------------------------------------
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[float]
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=== Put Warmer
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Allows to put a warmup search request on a specific index (or indices),
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with the body composing of a regular search request. Types can be
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provided as part of the URI if the search request is designed to be run
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only against the specific types.
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Here is an example that registers a warmup called `warmer_1` against
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index `test` (can be alias or several indices), for a search request
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that runs against all types:
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[source,js]
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--------------------------------------------------
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curl -XPUT localhost:9200/test/_warmer/warmer_1 -d '{
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"query" : {
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"match_all" : {}
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},
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"facets" : {
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"facet_1" : {
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"terms" : {
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"field" : "field"
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}
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}
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}
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}'
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--------------------------------------------------
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And an example that registers a warmup against specific types:
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[source,js]
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--------------------------------------------------
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curl -XPUT localhost:9200/test/type1/_warmer/warmer_1 -d '{
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"query" : {
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"match_all" : {}
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},
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"facets" : {
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"facet_1" : {
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"terms" : {
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"field" : "field"
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}
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}
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}
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}'
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--------------------------------------------------
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[float]
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=== Delete Warmer
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Removing a warmer can be done against an index (or alias / indices)
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based on its name. The provided name can be a simple wildcard expression
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or omitted to remove all warmers. Some samples:
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[source,js]
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--------------------------------------------------
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# delete warmer named warmer_1 on test index
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curl -XDELETE localhost:9200/test/_warmer/warmer_1
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# delete all warmers that start with warm on test index
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curl -XDELETE localhost:9200/test/_warmer/warm*
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# delete all warmers for test index
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curl -XDELETE localhost:9200/test/_warmer/
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--------------------------------------------------
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[float]
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=== GETting Warmer
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Getting a warmer for specific index (or alias, or several indices) based
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on its name. The provided name can be a simple wildcard expression or
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omitted to get all warmers. Some examples:
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[source,js]
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--------------------------------------------------
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# get warmer named warmer_1 on test index
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curl -XGET localhost:9200/test/_warmer/warmer_1
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# get all warmers that start with warm on test index
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curl -XGET localhost:9200/test/_warmer/warm*
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# get all warmers for test index
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curl -XGET localhost:9200/test/_warmer/
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--------------------------------------------------
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