All Solr(Cloud) information in ZK in a dedicated Znode
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Key: SOLR-3004
URL: https://issues.apache.org/jira/browse/SOLR-3004
Project: Solr
Issue Type: Improvement
Components: SolrCloud
Affects Versions: 4.0
Reporter: Per Steffensen
Fix For: 4.0
SolrCloud is using ZK for shared information. At the moment is distributes its
information over more than one root-Znode (e.g. "collections", "configs" and
"live-nodes"). It is not good style to act this way in ZK - pretending that you
are the only one using ZK. Suggest we put it all inside one single root-Znode
called "solr" or "solrcloud", so that we will have /solr/collections,
/solr/configs and /solr/live-nodes in ZK instead. Believe it is important to do
this change before the first "real" release including SolrCloud, because it is
much easier to do before than after. If we do it after we will probably have to
think about upgrade-code to move stuff from the old place to the new place in
order to have systems build on the first release without this improvement go
nicely to the next release with this improvement.
E.g. I am using Lily and HBase and they nicely put all their information in ZK
in designated root-Znodes ("hbase" and "lily").
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