Murray Hunter wrote:
We tested search for a 20 Million page index on a dual core 64 bit machine with 8 GB of ram using storage of the nutch data on another server through linux nfs, and it's performance was terrible. It looks like the bottleneck was nfs, so I was wondering how you had your storage set up. Are you using NDFS, or is it split up over multiple servers?
For good search performance, indexes and segments should always reside on local volumes, not in NDFS and not in NFS. Ideally these can be spread across the available local volumes, to permit more parallel disk i/o. As a rule of thumb, searching starts to get slow with more than around 20M pages per node. Systems larger than that should benefit from distributed search.
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