Hello! Robert, from my experience with Solr (since 1.2 and running few 1.4 deployments) Solr does not need any kind of mechanism to ensure it will auto start on crash, because I didn`t see it crash on it`s own fault. Just ensure, You have not one instance of Solr, and run it behind a proxy or load balancer of some kind.
-- Regards, Rafał Kuć > So then would the 'right' thing to do be to run it under something like > Daemontools so it bounces back up on a crash? Do any other people use > this approach or is there something better to make it come back up? > Speaking of overly large caches, if I have solr running on a machine > with 8GB main memory is it going to hurt to make some huge cache sizes? > Are these settings reasonable? With a small index I have been getting > some great hit-rates. > <ramBufferSizeMB>1024</ramBufferSizeMB> > <filterCache class="solr.FastLRUCache" size="350000" > initialSize="512" autowarmCount="80"/> > <queryResultCache class="solr.LRUCache" size="512000000" > initialSize="512" autowarmCount="80"/> > <documentCache class="solr.FastLRUCache" size="512000" > initialSize="512" autowarmCount="0"/> > Thanks > Robi > -----Original Message----- > From: Otis Gospodnetic [mailto:otis_gospodne...@yahoo.com] > Sent: Friday, July 31, 2009 11:37 PM > To: solr-user@lucene.apache.org > Subject: Re: 99.9% uptime requirement > Robi, > Solr is indeed very stable. However, it can crash and I've seen it > crash. Or rather, I should say I've seen the JVM that runs Solr crash. > For instance, if you have a servlet container with a number of webapps, > one of which is Solr, and one of which has a memory leak, I believe all > webapps will suffer and "crash". And even if you have just Solr in your > servlet container, it can OOM, say if you specify overly large caches or > too frequent commits, etc. > Otis > -- > Sematext is hiring -- http://sematext.com/about/jobs.html?mls > Lucene, Solr, Nutch, Katta, Hadoop, HBase, UIMA, NLP, NER, IR > ----- Original Message ---- >> From: Robert Petersen <rober...@buy.com> >> To: solr-user@lucene.apache.org >> Sent: Friday, July 31, 2009 12:18:55 PM >> Subject: 99.9% uptime requirement >> Hi all, >> My solr project powers almost all the pages in our site and so needs > to >> be up period. My question is what can I do to ensure that happens? >> Does solr ever crash, assuming reasonable load conditions and no > extreme >> index sizes? >> I saw some comments about running solr under daemontools in order to > get >> an auto-restart on crashes. From what I have seen so far in my > limited >> experience, solr is very stable and never crashes (so far). Does > anyone >> else have this requirement and if so how do they deal with it? Is >> anyone else running solr under daemontools in a production site? >> Thanks for any input you might have, >> Robi
