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From Shawn Heisey <>
Subject Re: Scalability Limit of SolrCloud
Date Thu, 27 Feb 2014 20:09:03 GMT
On 2/27/2014 4:46 AM, Vineet Mishra wrote:
> What is the Scalability Limit of CloudSolr, can it reach to index Billions
> of Documents and each document containing 400-500 Number Field(probably
> Float or Double).
> Is it possible and feasible to go with current CloudSolr Architecture or
> are there some other alternative or replacement.

In practice, you're going to run into problems resulting from 
insufficient system resources, not actual limitations in the software.  
This is likely to be the case with *any* search product.  Buying the 
hardware for very large scaling is expensive, especially if you want it 
on something like Amazon EC2 rather than on your own physical 
machines.Solr wants there to be lots of RAM, especially when the indexes 
get huge.

The only hard limitation that Solr has is the same as the only hard 
limitation that Lucene has -- a single Lucene index is limited to a 
little over two billion documents.  That's 2^31, the max value a Java 
integer will hold.  SolrCloud overcomes that easily with a sharding, 
because you aren't dealing with a single Lucene index.


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