Hari Sekhon created SOLR-7095:
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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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