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From Otis Gospodnetic <>
Subject Re: multi core vs multi app
Date Mon, 03 Mar 2008 19:22:42 GMT
Quick answers.  2 webapps one core/index each vs. 1 webapp with 2 cores (but there is also
1 webapp with 2 virtual webapps, one core/index each).  If RAM is an issue, I'd think 1 webapp
would be slightly gentler on your RAM.

Don't think you can search against multiple cores "automatically" - i.e. got to make multiple
queries, one for each core and combine results yourself.  Yes, this will slow things down.

Sematext -- -- Lucene - Solr - Nutch

----- Original Message ----
> From: David Pratt <>
> To:
> Sent: Monday, March 3, 2008 8:20:30 AM
> Subject: multi core vs multi app
> I am trying to decide whether it is best to work with multiple apps in a 
>   tomcat instance or run a single app with multiple cores. How do these 
> options compare in terms of impact on RAM requirements.
> Is anyone using the multicore in production to suggest whether it is 
> stable enough to use with replication scripts etc. Is there any sort of 
> a write up anywhere of how one could perform a search across multiple 
> cores within the single app? Not sure about efficiency of something like 
> though compared to merging indexes periodically to search across the 
> merged index instead. It would seem that a search across multiple cores 
> would add slowness even if this is doable. Any advice appreciated. Many 
> thanks.
> Regards,
> David

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