But note that I misspoke, which I realized after re-reading the thread I pointed you to. Mark explains it nicely there: * the index call returns only when (and IF!) indexing to all replicas succeeds
BUT, that should not be mixed with what search clients see! Just because the indexing client sees the all or nothing situation depending on whether indexing was successful on all replicas does NOT mean that search clients will always see a 100% consistent picture. Client A could hit the leader and see a newly indexed document, while client B could query the replica and not see that same document simply because the doc hasn't gotten there yet, or because soft commit hasn't happened just yet. Otis -- Solr & ElasticSearch Support http://sematext.com/ On Thu, Apr 11, 2013 at 4:39 PM, Zhang, Lisheng <lisheng.zh...@broadvision.com> wrote: > Thanks very much for your helps! > > -----Original Message----- > From: Otis Gospodnetic [mailto:otis.gospodne...@gmail.com] > Sent: Thursday, April 11, 2013 1:23 PM > To: solr-user@lucene.apache.org > Subject: Re: SolrCloud leader to replica > > > Yes, I *think* that is the case. Some distributed systems have the > option to return success to caller only after data has been > added/indexed to N other nodes, but I think Solr doesn't have this > yet. Somebody please correct me if I'm wrong. > > See: http://search-lucene.com/?q=eventually+consistent&fc_project=Solr > > Otis > -- > Solr & ElasticSearch Support > http://sematext.com/ > > > > > > On Thu, Apr 11, 2013 at 12:51 PM, Zhang, Lisheng > <lisheng.zh...@broadvision.com> wrote: >> Hi Otis, >> >> Thanks very much for the quick help! We are considering to upgrade >> from solr 3.6 to 4x and use solrCloud, but we are concerned about >> performance related to replica? In this scenario it seems that the >> replica would be a few seconds beyond leader because replica would >> start indexing only afer leader finishes his? >> >> Thanks and best regards, Lisheng >> >> -----Original Message----- >> From: Otis Gospodnetic [mailto:otis.gospodne...@gmail.com] >> Sent: Thursday, April 11, 2013 8:11 AM >> To: solr-user@lucene.apache.org >> Subject: Re: SolrCloud leader to replica >> >> >> I believe it indexes locally on leader first. Otherwise one could end >> up with a situation where indexing to replica(s) succeeds and indexing >> to leader fails, which I suspect might create a mess. >> >> Otis >> -- >> Solr & ElasticSearch Support >> http://sematext.com/ >> >> >> >> >> >> On Thu, Apr 11, 2013 at 2:53 AM, Zhang, Lisheng >> <lisheng.zh...@broadvision.com> wrote: >>> Hi, >>> >>> In solr 4x solrCloud, suppose we have only one shard and >>> two replica, when leader receives the indexing request, >>> does it immediately forward request to two replicas or >>> it first indexes request itself, then sends request to its >>> two replica? >>> >>> Thanks very much for helps, Lisheng >>> >>>
