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From "Noble Paul (JIRA)" <>
Subject [jira] Created: (SOLR-1293) Support for large no:of cores and faster loading/unloading of cores
Date Fri, 17 Jul 2009 10:27:14 GMT
Support for large no:of cores and faster loading/unloading of cores

                 Key: SOLR-1293
             Project: Solr
          Issue Type: New Feature
            Reporter: Noble Paul
             Fix For: 1.5

Solr , currently ,is not very suitable for a large no:of homogeneous cores where you require
fast/frequent loading/unloading of cores . usually a core is required to be loaded just to
fire a search query or to just index one document
The requirements of such a system are.

* Very efficient loading of cores . Solr cannot afford to read and parse and create Schema,
SolrConfig Objects for each core each time the core has to be loaded ( SOLR-919 , SOLR-920)
* START STOP core . Currently it is only possible to unload a core (SOLR-880)
* Automatic loading of cores . If a core is present and it is not loaded and a request comes
for that load it automatically before serving up a request
* As there are a large no:of cores , all the cores cannot be kept loaded always. There has
to be an upper limit beyond which we need to unload a few cores (probably the least recently
used ones)
* Automatic allotment of dataDir for cores. If the no:of cores is too high al the cores' dataDirs
cannot live in the same dir. There is an upper limit on the no:of dirs you can create in a
unix dir w/o affecting performance

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