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Since this is not a production machine and we're not yet running our own fault tolerance, RAID is better. Once we have our own replication and fault tolerance handling, we should consider JBOD. I thought at one point we were considering having one MySQL server instance (worker node) per spindle, rather than having to manage the data distribution internal to a MySQL instance. -- Kian-Tat Lim, LSST Data Management, [log in to unmask] ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the QSERV-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=QSERV-L&A=1