[jira] [Updated] (SOLR-2821) Improve how cluster state is managed in ZooKeeper.

["Sami Siren (Updated) (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-2821?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sami Siren updated SOLR-2821:
-----------------------------

    Attachment: SOLR-2821.patch

Here's a patch that changes the serialization format to json for all the data types currently stored in ZK.

The cloudstate serialization code is awfully verbose but so is the current xml code too. If all the objects were maps or lists the ser/deser would be super simple as Yonik said.
                
> Improve how cluster state is managed in ZooKeeper.
> --------------------------------------------------
>
>                 Key: SOLR-2821
>                 URL: https://issues.apache.org/jira/browse/SOLR-2821
>             Project: Solr
>          Issue Type: Improvement
>          Components: SolrCloud
>            Reporter: Mark Miller
>             Fix For: 4.0
>
>         Attachments: SOLR-2821.patch
>
>
> Currently, we have issues supporting both incremental cluster state updates (needed because reading the state with many ZK requests does not scale) and allowing shard/node properties to change on the fly. We be nice to have a solution that allows faster cluster state reads and easy on the fly shard/node prop changes.

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