--- layout: default title: CAT allocation parent: CAT API redirect_from: - /opensearch/rest-api/cat/cat-allocation/ nav_order: 5 has_children: false --- # CAT allocation Introduced 1.0 {: .label .label-purple } The CAT allocation operation lists the allocation of disk space for indexes and the number of shards on each node. ## Example ```json GET _cat/allocation?v ``` {% include copy-curl.html %} To limit the information to a specific node, add the node name after your query: ```json GET _cat/allocation/ ``` {% include copy-curl.html %} If you want to get information for more than one node, separate the node names with commas: ```json GET _cat/allocation/node_name_1,node_name_2,node_name_3 ``` {% include copy-curl.html %} ## Path and HTTP methods ``` GET _cat/allocation?v GET _cat/allocation/ ``` ## URL parameters All CAT allocation URL parameters are optional. In addition to the [common URL parameters]({{site.url}}{{site.baseurl}}/api-reference/cat/index), you can specify the following parameters: Parameter | Type | Description :--- | :--- | :--- 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/). local | Boolean | Whether to return information from the local node only instead of from the cluster_manager node. Default is false. cluster_manager_timeout | Time | The amount of time to wait for a connection to the cluster_manager node. Default is 30 seconds. ## Response The following response shows that eight shards are allocated to each of the two nodes available: ```json shards | disk.indices | disk.used | disk.avail | disk.total | disk.percent host | ip | node 8 | 989.4kb | 25.9gb | 32.4gb | 58.4gb | 44 172.18.0.4 | 172.18.0.4 | odfe-node1 8 | 962.4kb | 25.9gb | 32.4gb | 58.4gb | 44 172.18.0.3 | 172.18.0.3 | odfe-node2 ```