Jerry Bao created SOLR-12088:
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Summary: Shards with dead replicas cause increased write latency
Key: SOLR-12088
URL: https://issues.apache.org/jira/browse/SOLR-12088
Project: Solr
Issue Type: Bug
Security Level: Public (Default Security Level. Issues are Public)
Components: SolrCloud
Affects Versions: 7.2
Reporter: Jerry Bao
If a collection's shard contains dead replicas, write latency to the collection
is increased. For example, if a collection has 10 shards with a replication
factor of 3, and one of those shards contains 3 replicas and 3 downed replicas,
write latency is increased in comparison to a shard that contains only 3
replicas.
My feeling here is that downed replicas should be completely ignored and not
cause issues to other alive replicas in terms of write latency.
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