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Sami Siren updated SOLR-2880: ----------------------------- Attachment: SOLR-2880.patch This patch implements a simple overseer (cluster leader). Currently it does not do more than assign shard ids to cores so there is no added functionality. I wanted to post what I currently have here to get some feedback and improvement ideas. Two new top level zkNodes are created: /node_assignments /node_states Basically the integration point is the ZKController: When a core is registered its state is registered locally and nodes current state is published under /node_states When overseer assigns a shard id the state is stored locally (to overseer) and the assignments for the node are published under /node_assignments. Overseer gets the number of shards required for a collection from the collections properties in ZK. So if you wanted to add a new collection you'd create a new collection node and record the required number of shards (among other things like the used configuration) into its properties. Even if a node hosts multiple cores it only creates single node (/node_states/<id>) and reads a single node (/node_assignments/<id>). It might be simpler to have multiple subnodes (one for each core) > Investigate adding an overseer that can assign shards, later do re-balancing, > etc > --------------------------------------------------------------------------------- > > Key: SOLR-2880 > URL: https://issues.apache.org/jira/browse/SOLR-2880 > Project: Solr > Issue Type: Sub-task > Components: SolrCloud > Reporter: Mark Miller > Assignee: Mark Miller > Fix For: 4.0 > > Attachments: SOLR-2880.patch > > -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@lucene.apache.org For additional commands, e-mail: dev-h...@lucene.apache.org