On Mon, 2003-11-24 at 19:16, Greg Stark wrote: > William Yu <[EMAIL PROTECTED]> writes: > > > > You're right, though, mirroring a solid state drive is pretty pointless; if > > > power fails, both mirrors are dead. > > > > Actually no. Solid state memory is non-volatile. They retain data even without > > power. > > Note that flash ram only has a finite number of write cycles before it fails. > > On the other hand that might not be so bad for WAL which writes sequentially, > you can easily calculate how close you are to the maximum. For things like > heap storage or swap it's awful as you can get hot spots that get written to > thousands of times before the rest of the space is used.
I could be wrong, but I was under the impression that most of the newer flash disks tended to spread writes out over the drive so that hotspots are minimized. -- Suchandra Thapa <[EMAIL PROTECTED]>
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