Hi, Check http://search-lucene.com/?q=%22Cross+Data+Center+Replicaton%22 -> http://issues.apache.org/jira/browse/SOLR-6273
Otis -- Monitoring * Alerting * Anomaly Detection * Centralized Log Management Solr & Elasticsearch Support * http://sematext.com/ On Fri, Jan 2, 2015 at 4:52 PM, jaime spicciati <jaime.spicci...@gmail.com> wrote: > All, > > At my current customer we have developed a custom federator that will > federate queries between Endeca and Solr to ease the transition from an > extremely large (TBs of data) Endeca index to Solr. (Endeca is similar to > Solr in terms of search/faceted navigation/etc). > > > > During this transition plan we need to support multi datacenter failover > which we have historically handled via load balancers with the appropriate > failover configurations (think F5). We are currently playing our dataloads > into multiple datacenters to ensure data consistency. (Each datacenter has > a stand-alone instance of solrcloud with its own redundancy/failover) > > > > I am curious to see how the community handles multi datacenter failureover > at the presentation layer (datacenter A goes down and we want to failover > to B). Solrcloud within a datacenter will handle single datacenter failure > within the instance, but in order to support multi datacenter failover I > haven't seen a definitive ‘answer’ as to how to handle this situation. > > > > At this point the only two options I can come up with are > > 1) Fail the entire datacenter if Solrcloud goes offline (GUI/index/etc go > offline) > > - This is problematic because some portion of user activity will fail, > queries that are in transit will not complete > > 2) Implement failover at the custom federator level. In doing so we would > need to detect a failure at datacenter A within our federator, then query > datacenter B to fulfill the user request, then potentially fail the entire > datacenter A once all transactions have been fulfilled against A > > > > Since we are looking up the active solr instance via zookeeper (solrcloud) > per datacenter I don’t see any reasonable means of failing over to another > datacenter if a given solrcloud instance goes down? > > > Any thoughts are welcome at this point? > > Thanks > > Jaime >
