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Posted to issues@lucene.apache.org by "David Smiley (Jira)" <ji...@apache.org> on 2021/01/19 21:46:00 UTC
[jira] [Updated] (SOLR-15081) Metrics per core: report leader
true/false and replica state
[ https://issues.apache.org/jira/browse/SOLR-15081?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
David Smiley updated SOLR-15081:
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Description:
The core level metrics hold some interesting information, but I don't see information pertaining to the SolrCloud status of the core. In particular, I'd like to see the leader status here, and also the replica state. The use-case I have in mind is enabling the Prometheus Exporter to get the doc count (and maybe other basics) of only the leader replicas, thereby counting unique documents instead of a fully replicated figure. This is an approximation to doing a match-all-docs query on all collections, but is a more sound approach when one has orders of magnitude more collections than nodes.
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Final change: add "isLeader" and "replicaState" metrics per core.
was:The core level metrics hold some interesting information, but I don't see information pertaining to the SolrCloud status of the core. In particular, I'd like to see the leader status here, and also the replica state. The use-case I have in mind is enabling the Prometheus Exporter to get the doc count (and maybe other basics) of only the leader replicas, thereby counting unique documents instead of a fully replicated figure. This is an approximation to doing a match-all-docs query on all collections, but is a more sound approach when one has orders of magnitude more collections than nodes.
> Metrics per core: report leader true/false and replica state
> ------------------------------------------------------------
>
> Key: SOLR-15081
> URL: https://issues.apache.org/jira/browse/SOLR-15081
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: metrics
> Reporter: David Smiley
> Priority: Major
> Time Spent: 1h 40m
> Remaining Estimate: 0h
>
> The core level metrics hold some interesting information, but I don't see information pertaining to the SolrCloud status of the core. In particular, I'd like to see the leader status here, and also the replica state. The use-case I have in mind is enabling the Prometheus Exporter to get the doc count (and maybe other basics) of only the leader replicas, thereby counting unique documents instead of a fully replicated figure. This is an approximation to doing a match-all-docs query on all collections, but is a more sound approach when one has orders of magnitude more collections than nodes.
> ----
> Final change: add "isLeader" and "replicaState" metrics per core.
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