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From "Ramkumar Aiyengar (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-5748) Introduce autoManageReplicas collection property
Date Sun, 02 Mar 2014 11:04:21 GMT

    [ https://issues.apache.org/jira/browse/SOLR-5748?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13917358#comment-13917358
] 

Ramkumar Aiyengar commented on SOLR-5748:
-----------------------------------------

How do you plan to locate the replicas? It would be good to have some kind of control over
where the additional replicas will be so that the installation could decide that based on
the disk space, memory availability etc.

> Introduce autoManageReplicas collection property
> ------------------------------------------------
>
>                 Key: SOLR-5748
>                 URL: https://issues.apache.org/jira/browse/SOLR-5748
>             Project: Solr
>          Issue Type: Sub-task
>          Components: SolrCloud
>            Reporter: Shalin Shekhar Mangar
>             Fix For: 5.0
>
>
> I propose to introduce a collection property called autoManageReplicas. This will be
used only with the ZK as truth mode.
> If set to true, then whenever the number of replicas for a shard fall below the replicationFactor
and the down nodes do not come back up for a configurable amount of time, additional replicas
will be started up automatically. Similarly, if the actual number of replicas is equal to
or greater than replicationFactor then if old (previously down) nodes come back up then they
will not be allowed to join the shard and will be unloaded instead.
> I think we should not unload running shards if number of replicas are more for now. We
can change that later if needed.



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