What you say makes perfect sense. However i can offset the risk of disk i/o and latency by having good amount of RAM say 64 GB and 64 bit OS.
2 caveats being that 1. I have no clue if J2EE servers can use this much RAM (64 bit OS and JVM). 2. I have no idea on how can cache be auto-warmed. so that the users don't pay the penalty of loading the cache. Erick Erickson wrote: > > Sure, you can do that. But you're making a change that kind of defeats > the purpose. The underlying Lucene engine can be very disk intensive, > and any network latency will adversely affect the search speed. Which > is the point of replicating the indexes, to get them local to the SOLR/ > Lucene instance that's using them so disk access is as fast as > possible. > > If you're willing to trade the search speed for saving disk space, you > can set things up like you want. But I'd sure run some performance > tests against a local as opposed to remote instance of my index > before making a decision... > > HTH > Erick > > On Mon, Feb 15, 2010 at 2:50 AM, abhishes <abhis...@gmail.com> wrote: > >> >> Hello All, >> >> Upon reading the article >> >> >> http://www.lucidimagination.com/Community/Hear-from-the-Experts/Articles/Scaling-Lucene-and-Solr >> >> I have a question around index replication. >> >> If the query load is very high and I want multiple severs to be able to >> search the index. Can multiple servers share one read-only copy of the >> index? >> >> so one server (Master) builds the index and it is stored on a SAN. Then >> multiple Slave servers point to the same copy of the data and answer user >> queries. >> >> In the replication diagram, I see that the index is being copied on each >> of >> the Slave servers. >> >> This is not desirable because index is read-only (for the slave servers, >> because only master updates the index) and copying of indexes can take >> very >> long (depending on index size) and can unnecessarily waste disk space. >> -- >> View this message in context: >> http://old.nabble.com/Question-on-Index-Replication-tp27590418p27590418.html >> Sent from the Solr - User mailing list archive at Nabble.com. >> >> > > -- View this message in context: http://old.nabble.com/Question-on-Index-Replication-tp27590418p27596034.html Sent from the Solr - User mailing list archive at Nabble.com.
