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https://issues.apache.org/jira/browse/SOLR-7117?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Varun Thacker updated SOLR-7117:
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Attachment: SOLR-7117.patch
Thanks Mark for reviewing the patch.
bq. There is some class that makes it easy to quickly test what nodes are
chosen for failover.
Yeah I saw {{SharedFSAutoReplicaFailoverUtilsTest}} . It's super cool!
New patch which adds a test for this property.
Couple of other changes I made -
- Modified a live node in {{testGetBestCreateUrlMultipleCollections()}}. I
believe it was intended to be node2 and node1 in the first place.
- In this should the check be only for node3 since node2 is already hosting the
replica. Unless "r2-4" meant node2 or node4
{code}
result = buildClusterState("csr1R*r2-4sr3r4r5", NODE1, NODE2, NODE3);
createUrl =
OverseerAutoReplicaFailoverThread.getBestCreateUrl(result.reader,
result.badReplica, null);
assertTrue(createUrl.equals(NODE2_URL) || createUrl.equals(NODE3_URL));
{code}
Should we keep the property name "maxCoresPerNode" or something else?
> AutoAddReplicas should have a cluster wide property for controlling number of
> cores hosted on each node
> -------------------------------------------------------------------------------------------------------
>
> Key: SOLR-7117
> URL: https://issues.apache.org/jira/browse/SOLR-7117
> Project: Solr
> Issue Type: Improvement
> Reporter: Varun Thacker
> Priority: Minor
> Fix For: Trunk, 5.1
>
> Attachments: SOLR-7117.patch, SOLR-7117.patch
>
>
> Currently when finding the best node to host the failed replicas, we respect
> the maxShardsPerNode property. This is not an ideal solution as it's a per
> collection property and we need a cluster wide property. Also using
> maxShardsPerNode can lead to unequal distribution of replicas across nodes.
> We should just let users use the CLUSTERPROP API to set the max number of
> cores to be hosted on each node and use that value while picking the node the
> replica will be hosted on.
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