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Calc follower vs leader indexing lag based on shard global checkpoints (#104015)

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* Calc follower vs leader indexing lag baed on shard global checkpoints

* code simplify

* follow PR comments

* spotless

* Update docs/reference/ccr/apis/follow/get-follow-stats.asciidoc

Co-authored-by: Iraklis Psaroudakis <kingherc@gmail.com>

---------

Co-authored-by: Iraklis Psaroudakis <kingherc@gmail.com>
This commit is contained in:
Volodymyr Krasnikov 2024-01-10 11:03:52 -08:00 • committed by GitHub
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5
docs/reference/ccr/apis/follow/get-follow-stats.asciidoc
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@ -75,6 +75,9 @@ task. In this situation, the following task must be resumed manually with the
`index`::
(string) The name of the follower index.
`total_global_checkpoint_lag`::
(long) Indication of how much the follower is lagging the leader. This is the sum of the difference between the `leader_global_checkpoint` and the `follower_global_checkpoint` for all shards.
//Begin shards
`shards`::
(array) An array of shard-level following task statistics.
@ -219,6 +222,7 @@ The API returns the following results:
"indices" : [
{
"index" : "follower_index",
"total_global_checkpoint_lag" : 256,
"shards" : [
{
"remote_cluster" : "remote_cluster",
@ -255,6 +259,7 @@ The API returns the following results:
]
}
--------------------------------------------------
// TESTRESPONSE[s/"total_global_checkpoint_lag" : 256/"total_global_checkpoint_lag" : 0/]
// TESTRESPONSE[s/"leader_global_checkpoint" : 1024/"leader_global_checkpoint" : $body.indices.0.shards.0.leader_global_checkpoint/]
// TESTRESPONSE[s/"leader_max_seq_no" : 1536/"leader_max_seq_no" : $body.indices.0.shards.0.leader_max_seq_no/]
// TESTRESPONSE[s/"follower_global_checkpoint" : 768/"follower_global_checkpoint" : $body.indices.0.shards.0.follower_global_checkpoint/]

2
docs/reference/ccr/apis/get-ccr-stats.asciidoc
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@ -112,6 +112,7 @@ The API returns the following results:
"indices" : [
{
"index" : "follower_index",
"total_global_checkpoint_lag" : 256,
"shards" : [
{
"remote_cluster" : "remote_cluster",
@ -149,6 +150,7 @@ The API returns the following results:
}
}
--------------------------------------------------
// TESTRESPONSE[s/"total_global_checkpoint_lag" : 256/"total_global_checkpoint_lag" : 0/]
// 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/]