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Posted to dev@lucene.apache.org by "Noble Paul (JIRA)" <ji...@apache.org> on 2013/06/21 14:14:20 UTC
[jira] [Commented] (SOLR-4808) Persist and use replication factor
at Collection and Shard level
[ https://issues.apache.org/jira/browse/SOLR-4808?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13690216#comment-13690216 ]
Noble Paul commented on SOLR-4808:
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We need to redefine replicationFactor as the minimum no:of replicas for a given shard. The cluster will have atleast those many no:of replicas for that given shard. If the number falls below , that the overseer should attempt to bring the number upto that.
What if a node is asked to join a shard which has enough replicas according to the replicationFactor? It should be allowed to do so but the replicationFactor should remain same till it is changed through the cluster admin command.
replicationFactor value must be persisted per shard . We should be able to manipulate the value
* per shard : relevant for custom sharding
* entire cluster : for hash based setup the user would just update it cluster wide
* shard.keys values : for composite id collections it make sense to change the value by providing just the keys and the command can identify the appropriate shards
> Persist and use replication factor at Collection and Shard level
> ----------------------------------------------------------------
>
> Key: SOLR-4808
> URL: https://issues.apache.org/jira/browse/SOLR-4808
> Project: Solr
> Issue Type: New Feature
> Components: SolrCloud
> Reporter: Anshum Gupta
> Assignee: Shalin Shekhar Mangar
> Labels: solrcloud
>
> The replication factor for a collection as of now is not persisted and used while adding replicas.
> We should save the replication factor at collection factor as well as shard level.
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