On Apr 11, 2008, at 9:18 AM, Luca Berra wrote: this is not entirely correct.For the record, this is called a "write-intent bitmap". It's very handy, although to make it really perform you need to put it on a separate spindle from the data (which is supported). Otherwise the extra seeks cause quite an impact on disk performance. -- Jayson Vantuyl Systems Architect 1 866 518 9275 ext 204 |
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