Christine Poerschke created SOLR-10479:
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Summary: support
HttpShardHandlerFactory.loadBalancerRequests(MinimumAbsolute|MaximumFraction)
options
Key: SOLR-10479
URL: https://issues.apache.org/jira/browse/SOLR-10479
Project: Solr
Issue Type: New Feature
Reporter: Christine Poerschke
Assignee: Christine Poerschke
Priority: Minor
If a request sends no {{timeAllowed}} threshold (or if it sends a very generous
threshold) then that request can potentially be retried on 'very many' servers
in the cloud.
Via the
{{HttpShardHandlerFactory.loadBalancerRequests(MinimumAbsolute|MaximumFraction)}}
options the number of servers tried can be restricted via configuration e.g.
{code}
<shardHandlerFactory name="shardHandlerFactory"
class="solr.HttpShardHandlerFactory">
<int name="loadBalancerRequestsMinimumAbsolute">2</int>
<float name="loadBalancerRequestsMaximumFraction">0.50</float>
</shardHandlerFactory>
{code}
would on a six-replica-and-all-replicas-active collection/shard restrict
sending to three replicas i.e. max(2, 0.50 x 6) and if the collection/shard
temporarily becomes three-replicas-active-and-three-replicas-recovering-or-down
then sending is restricted to two replicas i.e. max(2, 0.50 x 3) temporarily.
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