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52 lines
1.8 KiB
Markdown
52 lines
1.8 KiB
Markdown
---
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layout: default
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title: CAT nodes operation
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parent: CAT API
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nav_order: 40
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has_children: false
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---
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# CAT nodes
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Introduced 1.0
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{: .label .label-purple }
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The CAT nodes operation lists node-level information, including node roles and load metrics.
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A few important node metrics are `pid`, `name`, `cluster_manager`, `ip`, `port`, `version`, `build`, `jdk`, along with `disk`, `heap`, `ram`, and `file_desc`.
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## Example
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```
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GET _cat/nodes?v
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```
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## Path and HTTP methods
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```
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GET _cat/nodes
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```
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## URL parameters
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All CAT nodes URL parameters are optional.
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In addition to the [common URL parameters]({{site.url}}{{site.baseurl}}/api-reference/cat/index), you can specify the following parameters:
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Parameter | Type | Description
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:--- | :--- | :---
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bytes | Byte size | Specify the units for byte size. For example, `7kb` or `6gb`. For more information, see [Supported units]({{site.url}}{{site.baseurl}}/opensearch/units/).
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full_id | Boolean | If true, return the full node ID. If false, return the shortened node ID. Defaults to false.
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local | Boolean | Whether to return information from the local node only instead of from the cluster_manager node. Default is false.
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cluster_manager_timeout | Time | The amount of time to wait for a connection to the cluster manager node. Default is 30 seconds.
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time | Time | Specify the units for time. For example, `5d` or `7h`. For more information, see [Supported units]({{site.url}}{{site.baseurl}}/opensearch/units/).
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include_unloaded_segments | Boolean | Whether to include information from segments not loaded into memory. Default is false.
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## Response
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```json
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ip | heap.percent | ram.percent | cpu load_1m | load_5m | load_15m | node.role | node.roles | master | name
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10.11.1.225 | 31 | 32 | 0 | 0.00 | 0.00 | di | data,ingest,ml | - | data-e5b89ad7
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```
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