Re: [Exadata] How do you use FlashDisk ?
From: Jared Still <jkstill_at_gmail.com>
Date: Sat, 19 Mar 2011 10:53:12 -0700
Message-ID: <AANLkTimv8PFA7GsQ6JPj9nbL9Fp6Rs2PjpJgFoBtMjs3_at_mail.gmail.com>
On Sat, Mar 19, 2011 at 6:58 AM, Robert Freeman <robertgfreeman_at_yahoo.com>wrote:
Date: Sat, 19 Mar 2011 10:53:12 -0700
Message-ID: <AANLkTimv8PFA7GsQ6JPj9nbL9Fp6Rs2PjpJgFoBtMjs3_at_mail.gmail.com>
On Sat, Mar 19, 2011 at 6:58 AM, Robert Freeman <robertgfreeman_at_yahoo.com>wrote:
> Flash disks for WRITE operations are actually not that fast. I don't have
> the performance numbers here, but you really don't buy anything in terms of
> write performance with flash disks. So I would not recommend them for a disk
> group that will contain, say, online redo logs.
>
Interesting observation Robert.
From the two guys at LSI that test flash memory with Oracle:
"Online redo logs are best handled by Hard Disk Drives because of the sequential writes"
Jared Still
Certifiable Oracle DBA and Part Time Perl Evangelist
Oracle Blog: http://jkstill.blogspot.com
Home Page: http://jaredstill.com
-- http://www.freelists.org/webpage/oracle-lReceived on Sat Mar 19 2011 - 12:53:12 CDT