[[cat-allocation]]
== cat allocation

`allocation` provides a snapshot of how many shards are allocated to each data node
and how much disk space they are using.

[source,js]
--------------------------------------------------
GET /_cat/allocation?v
--------------------------------------------------
// CONSOLE
// TEST[s/^/PUT test\n{"settings": {"number_of_replicas": 0}}\n/]

Might respond with:

[source,js]
--------------------------------------------------
shards disk.indices disk.used disk.avail disk.total disk.percent host      ip        node
     5         260b    47.3gb     43.4gb    100.7gb           46 127.0.0.1 127.0.0.1 CSUXak2
--------------------------------------------------
// TESTRESPONSE[s/260b/\\d+b/ s/\d+(\.\d+)?[tgmk]?b/\\d+(\\.\\d+)?[tgmk]?b/ s/46/\\d+/]
// TESTRESPONSE[s/CSUXak2/.+/ _cat]

Here we can see that each node has been allocated a single shard and
that they're all using about the same amount of space.