You're viewing version 2.7 of the OpenSearch documentation. This version is no longer maintained. For the latest version, see the current documentation. For information about OpenSearch version maintenance, see Release Schedule and Maintenance Policy.
CAT allocation
Introduced 1.0
The CAT allocation operation lists the allocation of disk space for indexes and the number of shards on each node.
Example
GET _cat/allocation?v
To limit the information to a specific node, add the node name after your query:
GET _cat/allocation/<node_name>
If you want to get information for more than one node, separate the node names with commas:
GET _cat/allocation/node_name_1,node_name_2,node_name_3
Path and HTTP methods
GET _cat/allocation?v
GET _cat/allocation/<node_name>
URL parameters
All CAT allocation URL parameters are optional.
In addition to the common URL parameters, 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. |
| 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:
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