OpenSearch/docs/reference/ccr/apis/get-ccr-stats.asciidoc

[role="xpack"]
[testenv="platinum"]
[[ccr-get-stats]]
=== Get Cross-Cluster Replication Stats API
++++
<titleabbrev>Get Follower Stats</titleabbrev>
++++

beta[]

Get {ccr} stats.

==== Description

This API gets {ccr} stats. This API will return all stats related to {ccr}. In
particular, this API returns stats about auto-following, and returns the same
shard-level stats as in the <<ccr-get-follow-stats,get follower stats API>>.

==== Request

//////////////////////////

[source,js]
--------------------------------------------------
PUT /follower_index/_ccr/follow
{
  "remote_cluster" : "remote_cluster",
  "leader_index" : "leader_index"
}
--------------------------------------------------
// CONSOLE
// TESTSETUP
// TEST[setup:remote_cluster_and_leader_index]

[source,js]
--------------------------------------------------
POST /follower_index/_ccr/pause_follow
--------------------------------------------------
// CONSOLE
// TEARDOWN

//////////////////////////

[source,js]
--------------------------------------------------
GET /_ccr/stats
--------------------------------------------------
// CONSOLE

==== Results

This API returns the following information:

`auto_follow_stats`::
  (object) an object representing stats for the auto-follow coordinator

This object consists of the following fields:

`auto_follow_stats.number_of_failed_follow_indices`::
  (long) the number of indices that the auto-follow coordinator failed to
  automatically follow; the causes of recent failures are captured in the logs
  of the elected master node, and in the
  `auto_follow_stats.recent_auto_follow_errors` field

`auto_follow_stats.number_of_failed_remote_cluster_state_requests`::
  (long) the number of times that the auto-follow coordinator failed to retrieve
  the cluster state from a remote cluster registered in a collection of
  auto-follow patterns

`auto_follow_stats.number_of_successful_follow_indices`::
  (long) the number of indices that the auto-follow coordinator successfully
  followed

`auto_follow_stats.recent_auto_follow_errors`::
  (array) an array of objects representing failures by the auto-follow
  coordinator

`follow_stats`::
  (object) an object representing shard-level stats for follower indices; refer
  to the details of the response in the
  <<ccr-get-follow-stats,get follower stats API>>

==== Example

This example retrieves {ccr} stats:

[source,js]
--------------------------------------------------
GET /_ccr/stats
--------------------------------------------------
// CONSOLE

The API returns the following results:

[source,js]
--------------------------------------------------
{
  "auto_follow_stats" : {
    "number_of_failed_follow_indices" : 0,
    "number_of_failed_remote_cluster_state_requests" : 0,
    "number_of_successful_follow_indices" : 1,
    "recent_auto_follow_errors" : [ ]
  },
  "follow_stats" : {
    "indices" : [
      {
        "index" : "follower_index",
        "shards" : [
          {
            "remote_cluster" : "remote_cluster",
            "leader_index" : "leader_index",
            "follower_index" : "follower_index",
            "shard_id" : 0,
            "leader_global_checkpoint" : 1024,
            "leader_max_seq_no" : 1536,
            "follower_global_checkpoint" : 768,
            "follower_max_seq_no" : 896,
            "last_requested_seq_no" : 897,
            "outstanding_read_requests" : 8,
            "outstanding_write_requests" : 2,
            "write_buffer_operation_count" : 64,
            "follower_mapping_version" : 4,
            "follower_settings_version" : 2,
            "total_read_time_millis" : 32768,
            "total_read_remote_exec_time_millis" : 16384,
            "successful_read_requests" : 32,
            "failed_read_requests" : 0,
            "operations_read" : 896,
            "bytes_read" : 32768,
            "total_write_time_millis" : 16384,
            "write_buffer_size_in_bytes" : 1536,
            "successful_write_requests" : 16,
            "failed_write_requests" : 0,
            "operations_written" : 832,
            "read_exceptions" : [ ],
            "time_since_last_read_millis" : 8
          }
        ]
      }
    ]
  }
}
--------------------------------------------------
// TESTRESPONSE[s/"number_of_failed_follow_indices" : 0/"number_of_failed_follow_indices" : $body.auto_follow_stats.number_of_failed_follow_indices/]
// TESTRESPONSE[s/"number_of_failed_remote_cluster_state_requests" : 0/"number_of_failed_remote_cluster_state_requests" : $body.auto_follow_stats.number_of_failed_remote_cluster_state_requests/]
// TESTRESPONSE[s/"number_of_successful_follow_indices" : 1/"number_of_successful_follow_indices" : $body.auto_follow_stats.number_of_successful_follow_indices/]
// TESTRESPONSE[s/"recent_auto_follow_errors" : [ ]/"recent_auto_follow_errors" : $body.auto_follow_stats.recent_auto_follow_errors/]
// TESTRESPONSE[s/"leader_global_checkpoint" : 1024/"leader_global_checkpoint" : $body.follow_stats.indices.0.shards.0.leader_global_checkpoint/]
// TESTRESPONSE[s/"leader_max_seq_no" : 1536/"leader_max_seq_no" : $body.follow_stats.indices.0.shards.0.leader_max_seq_no/]
// TESTRESPONSE[s/"follower_global_checkpoint" : 768/"follower_global_checkpoint" : $body.follow_stats.indices.0.shards.0.follower_global_checkpoint/]
// TESTRESPONSE[s/"follower_max_seq_no" : 896/"follower_max_seq_no" : $body.follow_stats.indices.0.shards.0.follower_max_seq_no/]
// TESTRESPONSE[s/"last_requested_seq_no" : 897/"last_requested_seq_no" : $body.follow_stats.indices.0.shards.0.last_requested_seq_no/]
// TESTRESPONSE[s/"outstanding_read_requests" : 8/"outstanding_read_requests" : $body.follow_stats.indices.0.shards.0.outstanding_read_requests/]
// TESTRESPONSE[s/"outstanding_write_requests" : 2/"outstanding_write_requests" : $body.follow_stats.indices.0.shards.0.outstanding_write_requests/]
// TESTRESPONSE[s/"write_buffer_operation_count" : 64/"write_buffer_operation_count" : $body.follow_stats.indices.0.shards.0.write_buffer_operation_count/]
// TESTRESPONSE[s/"follower_mapping_version" : 4/"follower_mapping_version" : $body.follow_stats.indices.0.shards.0.follower_mapping_version/]
// TESTRESPONSE[s/"follower_settings_version" : 2/"follower_settings_version" : $body.follow_stats.indices.0.shards.0.follower_settings_version/]
// TESTRESPONSE[s/"total_read_time_millis" : 32768/"total_read_time_millis" : $body.follow_stats.indices.0.shards.0.total_read_time_millis/]
// TESTRESPONSE[s/"total_read_remote_exec_time_millis" : 16384/"total_read_remote_exec_time_millis" : $body.follow_stats.indices.0.shards.0.total_read_remote_exec_time_millis/]
// TESTRESPONSE[s/"successful_read_requests" : 32/"successful_read_requests" : $body.follow_stats.indices.0.shards.0.successful_read_requests/]
// TESTRESPONSE[s/"failed_read_requests" : 0/"failed_read_requests" : $body.follow_stats.indices.0.shards.0.failed_read_requests/]
// TESTRESPONSE[s/"operations_read" : 896/"operations_read" : $body.follow_stats.indices.0.shards.0.operations_read/]
// TESTRESPONSE[s/"bytes_read" : 32768/"bytes_read" : $body.follow_stats.indices.0.shards.0.bytes_read/]
// TESTRESPONSE[s/"total_write_time_millis" : 16384/"total_write_time_millis" : $body.follow_stats.indices.0.shards.0.total_write_time_millis/]
// TESTRESPONSE[s/"write_buffer_size_in_bytes" : 1536/"write_buffer_size_in_bytes" : $body.follow_stats.indices.0.shards.0.write_buffer_size_in_bytes/]
// TESTRESPONSE[s/"successful_write_requests" : 16/"successful_write_requests" : $body.follow_stats.indices.0.shards.0.successful_write_requests/]
// TESTRESPONSE[s/"failed_write_requests" : 0/"failed_write_requests" : $body.follow_stats.indices.0.shards.0.failed_write_requests/]
// TESTRESPONSE[s/"operations_written" : 832/"operations_written" : $body.follow_stats.indices.0.shards.0.operations_written/]
// TESTRESPONSE[s/"time_since_last_read_millis" : 8/"time_since_last_read_millis" : $body.follow_stats.indices.0.shards.0.time_since_last_read_millis/]