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From "Hari Sekhon (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SOLR-7095) Disaster Recovery native online cross-site replication for NRT SolrCloud
Date Tue, 10 Feb 2015 16:09:11 GMT
Hari Sekhon created SOLR-7095:
---------------------------------

             Summary: Disaster Recovery native online cross-site replication for NRT SolrCloud
                 Key: SOLR-7095
                 URL: https://issues.apache.org/jira/browse/SOLR-7095
             Project: Solr
          Issue Type: New Feature
    Affects Versions: 4.10
            Reporter: Hari Sekhon


Feature request to add native online cross-site DR support for NRT SolrCloud.

Currently NRT DR recovery requires taking down the recovering cluster including halting any
new indexing, changing zookeeper emsembles to the other datacenter for one node per shard
to replicate, then taking down again to switch back to local DC zookeeper ensemble after shard
has caught up. This is a relatively difficult/tedious manual operation to perform and seems
impossible to get completely up to date in scenarios with constant new update requests arriving
during downtime of switching back to local DC's zookeeper ensemble, therefore preventing 100%
accurate catch up.

There will be trade-offs such as making cross-site replication async to avoid update latency
penalty, and may require a last-write-wins type scenario like Cassandra.

Regards,

Hari Sekhon
http://www.linkedin.com/in/harisekhon



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