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141 lines
4.3 KiB
Text
141 lines
4.3 KiB
Text
[[cat-allocation]]
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=== cat allocation API
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++++
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<titleabbrev>cat allocation</titleabbrev>
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++++
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..New API reference
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[sidebar]
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--
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For the most up-to-date API details, refer to {api-es}/group/endpoint-cat[Compact and aligned text (CAT) APIs]..
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--
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[IMPORTANT]
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====
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cat APIs are only intended for human consumption using the command line or {kib}
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console. They are _not_ intended for use by applications. For application
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consumption, use the <<cluster-nodes-stats,node stats API>>.
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====
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Provides a snapshot of the number of shards <<shard-allocation-relocation-recovery,allocated>> to each data node
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and their disk space.
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[[cat-allocation-api-request]]
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==== {api-request-title}
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`GET /_cat/allocation/<node_id>`
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`GET /_cat/allocation`
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[[cat-allocation-api-prereqs]]
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==== {api-prereq-title}
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* If the {es} {security-features} are enabled, you must have the `monitor` or
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`manage` <<privileges-list-cluster,cluster privilege>> to use this API.
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[[cat-allocation-api-path-params]]
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==== {api-path-parms-title}
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include::{es-ref-dir}/rest-api/common-parms.asciidoc[tag=node-id]
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[[cat-allocation-api-query-params]]
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==== {api-query-parms-title}
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include::{es-ref-dir}/rest-api/common-parms.asciidoc[tag=bytes]
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include::{es-ref-dir}/rest-api/common-parms.asciidoc[tag=http-format]
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include::{es-ref-dir}/rest-api/common-parms.asciidoc[tag=local]
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include::{es-ref-dir}/rest-api/common-parms.asciidoc[tag=master-timeout]
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include::{es-ref-dir}/rest-api/common-parms.asciidoc[tag=cat-h]
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include::{es-ref-dir}/rest-api/common-parms.asciidoc[tag=help]
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include::{es-ref-dir}/rest-api/common-parms.asciidoc[tag=cat-s]
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include::{es-ref-dir}/rest-api/common-parms.asciidoc[tag=cat-v]
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[[cat-allocation-api-response-body]]
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==== {api-response-body-title}
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`shards`::
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Number of primary and replica shards assigned to the node.
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`shards.undesired`::
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Amount of shards that are scheduled to be moved elsewhere in the cluster
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or -1 other than desired balance allocator is used
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`write_load.forecast`::
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Sum of index write load forecasts
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`disk.indices.forecast`::
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Sum of shard size forecasts
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`disk.indices`::
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Disk space used by the node's shards. Does not include disk space for the
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<<index-modules-translog,translog>> or unassigned shards.
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+
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IMPORTANT: This metric double-counts disk space for hard-linked files, such as
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those created when <<indices-shrink-index,shrinking>>,
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<<indices-split-index,splitting>>, or <<indices-clone-index,cloning>> an index.
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`disk.used`::
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+
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--
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Total disk space in use. {es} retrieves this metric from the node's operating
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system (OS). The metric includes disk space for:
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- {es}, including the <<index-modules-translog,translog>> and unassigned shards
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- The node's OS
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- Any other applications or files on the node
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Unlike `disk.indices`, this metric does not double-count disk space for
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hard-linked files.
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--
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`disk.avail`::
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Free disk space available to {es}. {es} retrieves this metric from the node's
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OS. <<disk-based-shard-allocation,Disk-based shard allocation>> uses this metric to assign
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shards to nodes based on available disk space.
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`disk.total`::
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Total disk space for the node, including in-use and available space.
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`disk.percent`::
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Total percentage of disk space in use. Calculated as `disk.used` / `disk.total`.
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`host`::
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Network host for the node. Set using <<network.host,`network.host`>>.
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`ip`::
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IP address and port for the node.
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`node`::
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Name for the node. Set using <<node-name,`node.name`>>.
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`node.role`, `r`, `role`, `nodeRole`::
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Node roles
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[[cat-allocation-api-example]]
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==== {api-examples-title}
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[source,console,id=cat-allocation-example]
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--------------------------------------------------
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GET /_cat/allocation?v=true
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--------------------------------------------------
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// TEST[s/^/PUT test\n{"settings": {"number_of_replicas": 0}}\n/]
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The API returns the following response:
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[source,txt]
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--------------------------------------------------
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shards shards.undesired write_load.forecast disk.indices.forecast disk.indices disk.used disk.avail disk.total disk.percent host ip node node.role
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1 0 0.0 260b 260b 47.3gb 43.4gb 100.7gb 46 127.0.0.1 127.0.0.1 CSUXak2 himrst
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--------------------------------------------------
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// TESTRESPONSE[s/\d+(\.\d+)?[tgmk]?b/\\d+(\\.\\d+)?[tgmk]?b/ s/46/\\d+/]
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// TESTRESPONSE[s/CSUXak2 himrst/.+/ non_json]
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This response shows a single shard is allocated to the one node available.
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