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From Per Steffensen <>
Subject Re: Max number of core in Solr multi-core
Date Wed, 02 Jan 2013 15:35:51 GMT
Furthermore, if you plan to index "a lot" of data per application, and 
you are using Solr 4.0.0+ (including Solr Cloud), you probably want to 
consider creating a collection per application instead of a core per 

On 1/2/13 2:38 PM, Erick Erickson wrote:
> This is a common approach to this problem, having separate
> cores keeps the apps from influencing each other when it comes
> to term frequencies & etc. It also keeps the chances of returning
> the wrong data do a minimum.
> As to how many cores can fit, "it depends" (tm). There's lots of
> work going on right now, see:
> But having all those cores does allow you to expand your system
> pretty easily if you do run over the limit your hardware can handle, just
> move the entire core to a new machine. Only testing will tell
> you where that limit is.
> Best
> Erick
> On Wed, Jan 2, 2013 at 7:18 AM, Parvin Gasimzade <
>> wrote:
>> Hi all,
>> We have a system that enables users to create applications and store data
>> on their application. We want to separate the index of each application. We
>> create a core for each application and search on the given application when
>> user make query. Since there isn't any relation between the applications,
>> this solution could perform better than the storing all index together.
>> I have two questions related to this.
>> 1. Is this a good solution? If not could you please suggest any better
>> solution?
>> 2. Is there a limit on the number of core that I can create on Solr? There
>> will be thousands maybe more application on the system.
>> P.S. This question is also asked in the
>> stackoverflow<
>> .
>> Thanks,
>> Parvin

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