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The "LotsOfCores" page has been changed by ErickErickson: http://wiki.apache.org/solr/LotsOfCores?action=diff&rev1=20&rev2=21 Comment: Claiming that "automatic allotment of dataDir for cores" is unnecessary 1. Lazy load cores - Provide a way to START/STOP core. 1. Automatic loading of cores - Start a core automatically if a request comes in for a "stopped" core. 1. LRU Core Loading/Unloading - As there are a large number 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. - 1. Automatic allotment of dataDir for cores - If the number of cores is too high, all the cores' dataDirs cannot live in the same directory. There is an upper limit on the number of directories you can create in a directory w/o affecting performance. + 1. Automatic allotment of dataDir for cores - If the number of cores is too high, all the cores' dataDirs cannot live in the same directory. There is an upper limit on the number of directories you can create in a directory w/o affecting performance. Erick Erickson claims that this is taken care of by file walking, the resulting tree structure can be as deep as required to limit the number of files in any particular directory, so all cores live under <solr_home>. = Issues = * [[https://issues.apache.org/jira/browse/SOLR-1293|SOLR-1293]] - Support for large number of cores and faster loading/unloading of cores. This issue has many child issues focusing on individual changes:
