Speak for yourself! With 12 local disks on a dual backplane, it is possible to sustain >1GB/s read or write. This is with fairly straightforward hardware.
That is pretty difficult to do with commodity networking (generally limited to dual 1Gb NIC's for an aggregate of 200MB/s (if you are lucky)). Moreover, bandwidth to locally cached data is vastly better than bandwidth to remotely cached data. I agree that network latency isn't a big factor next to disk latency, but local bandwidth still wins. On Tue, Feb 1, 2011 at 12:26 AM, tsuna <[email protected]> wrote: > If you have a well designed network infrastructure, using local disks > is not noticeably faster than using a remote disk. The performance > penalty of network hops is negligible compared to the performance > penalty of going to disk. >
