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Elasticsearch Guide [7.7] » REST APIs » cat APIs » cat recovery API
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cat recovery APIedit

Returns information about ongoing and completed shard recoveries, similar to the index recovery API.

Requestedit

GET /_cat/recovery/<index>

GET /_cat/recovery

Descriptionedit

The cat recovery API returns information about shard recoveries, both ongoing and completed. It is a more compact view of the JSON index recovery API.

Shard recovery is the process of syncing a replica shard from a primary shard. Upon completion, the replica shard is available for search.

Recovery automatically occurs during the following processes:

Path parametersedit

<index>
(Optional, string) Comma-separated list or wildcard expression of index names used to limit the request.

Query parametersedit

active_only
(Optional, boolean) If true, the response only includes ongoing shard recoveries. Defaults to false.
bytes
(Optional, byte size units) Unit used to display byte values.
detailed
(Optional, boolean) If true, the response includes detailed information about shard recoveries. Defaults to false.
format
(Optional, string) Short version of the HTTP accept header. Valid values include JSON, YAML, etc.
h
(Optional, string) Comma-separated list of column names to display.
help
(Optional, boolean) If true, the response includes help information. Defaults to false.
index
(Optional, string) Comma-separated list or wildcard expression of index names used to limit the request.
s
(Optional, string) Comma-separated list of column names or column aliases used to sort the response.
time
(Optional, time units) Unit used to display time values.
v
(Optional, boolean) If true, the response includes column headings. Defaults to false.

Examplesedit

Example with no ongoing recoveriesedit 

GET _cat/recovery?v

The API returns the following response:

index   shard time type  stage source_host source_node target_host target_node repository snapshot files files_recovered files_percent files_total bytes bytes_recovered bytes_percent bytes_total translog_ops translog_ops_recovered translog_ops_percent
twitter 0     13ms store done  n/a         n/a         127.0.0.1   node-0      n/a        n/a      0     0               100%          13          0     0               100%          9928        0            0                      100.0%

In this example response, the source and target nodes are the same because the recovery type is store, meaning they were read from local storage on node start.

Example with a live shard recoveryedit

By increasing the replica count of an index and bringing another node online to host the replicas, you can retrieve information about an ongoing recovery.

GET _cat/recovery?v&h=i,s,t,ty,st,shost,thost,f,fp,b,bp

The API returns the following response:

i       s t      ty   st    shost       thost       f     fp      b bp
twitter 0 1252ms peer done  192.168.1.1 192.168.1.2 0     100.0%  0 100.0%

In this example response, the recovery type is peer, meaning the shard recovered from another node. The returned files and bytes are real-time measurements.

Example with a snapshot recoveryedit

You can restore backups of an index using the snapshot and restore API. You can use the cat recovery API retrieve information about a snapshot recovery.

GET _cat/recovery?v&h=i,s,t,ty,st,rep,snap,f,fp,b,bp

The API returns the following response with a recovery type of snapshot:

i       s t      ty       st    rep     snap   f  fp   b     bp
twitter 0 1978ms snapshot done  twitter snap_1 79 8.0% 12086 9.0%
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