Re: [PERFORM] Hardware/OS recommendations for large databases (

2005-11-16 Thread Welty, Richard
David Boreham wrote: > I guess I've never bought into the vendor story that there are > two reliability grades. Why would they bother making two > different kinds of bearing, motor etc ? Seems like it's more > likely an excuse to justify higher prices. then how to account for the fact that bleedin

Re: [PERFORM] RAID Stripe size

2005-09-20 Thread Welty, Richard
Alex Turner wrote: > I would also recommend looking at file system. For us JFS worked > signifcantly > faster than resier for large read loads and large write loads, so we chose > JFS > over ext3 and reiser. has jfs been reliable for you? there seems to be a lot of conjecture about inst

Re: [PERFORM] Battery Backed Cache for RAID

2005-09-14 Thread Welty, Richard
John A Meinel wrote: >The recent *cheap* version of a ramdisk had battery backup for 16 hours. >(Very expensive ramdisks actually have enough battery power to power a >small hard-drive to dump the contents into). >I'm guessing for a RAID controller, the time would be in the max 1 day >range. i t