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From "Yonik Seeley (Commented) (JIRA)" <>
Subject [jira] [Commented] (SOLR-2821) Improve how cluster state is managed in ZooKeeper.
Date Fri, 02 Dec 2011 10:03:40 GMT


Yonik Seeley commented on SOLR-2821:

bq. Sami said he noticed that 150ms of the 200ms it takes to update the cluster state looks
like its in parsing the XML. I wonder if json would be faster to parse...

It was significantly faster when I tested a few years ago.

ObjectBuilder.fromJSON(String) is a one-step easy way to get a whole object graph (Map, List,
Streaming (not materializing the object graph) is the fastest of course.
> Improve how cluster state is managed in ZooKeeper.
> --------------------------------------------------
>                 Key: SOLR-2821
>                 URL:
>             Project: Solr
>          Issue Type: Improvement
>          Components: SolrCloud
>            Reporter: Mark Miller
>             Fix For: 4.0
> 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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