Re: asm on san
Date: Fri, 12 Dec 2008 16:54:57 -0800 (PST)
On Dec 12, 3:07 pm, DA Morgan <damor..._at_psoug.org> wrote:
> It is more than just when it is in degraded mode. RAID5 has substantial
> negative impacts on performance all of the time the system is not idle.
> James Morle, at UKOUG, pointed out that a similar issue exists with the
> new Solid State drives too making them problematic for small writes.
> If you shackle a system with RAID5 today, and later need the horsepower,
> you will find it almost impossible, from a practical standpoint, to get
> off RAID5. Better to say NO! now than later.
> If they can't afford the disk ... the data isn't that important.
> This is not to say backups couldn't be sitting on RAID5. But operational
> datafiles? redo log files? No way.
Lots of posturing here ... wonder if anyone has ever posted that RAID 5 is fine and running on Apple storage hardware is what everyone is going to ...
Doesn't smell good from certain contributors to this thread ... Received on Fri Dec 12 2008 - 18:54:57 CST