Oracle FAQ | Your Portal to the Oracle Knowledge Grid |
![]() |
![]() |
Home -> Community -> Mailing Lists -> Oracle-L -> RE: Configuring Oracle with RAID and OFA
I *knew* I should have explained that more. I had some verbage that I just
deleted for the sake of simplicity. And it sounded much more impressive by
leaving things hanging... :)
After talking with the contractor that I worked with in setting this up, I
was wrong about our physical layout. I was thinking it was a 6-wide
mirrored stripe for the 6GB of datafiles. That would be silly. It's
11-wide. Yes. That's 22 total disks for just the datafiles. A full Photon
(11 drives on the front, 11 on back). The redos and archives and their
respective mirrors are spread across another 10 on a D1000. 32 disks in
all. Da-roo-ul, da-roo-ul.
Our hotbacks are nothing special. We use a home-grown, partially plagarized, simple shell/SQL script combo that serially puts each tablespace into backup mode, copies the underlying datafiles *to another disk*, then ends the backup. Pretty generic stuff. The key is that our hotbacks are disk-to-disk. Why disk-to-disk instead of disk-to-tape for us?
I've been writing too long on this -- need to get back to work! Hopefully, this will explain my previous message a little better. :)
Rich
Rich Jesse System/Database Administrator rich.jesse_at_qtiworld.com Quad/Tech International, Sussex, WI USA
-----Original Message-----
Sent: Thursday, March 27, 2003 3:44 PM
To: Multiple recipients of list ORACLE-L
Rich,
How did you manage to take hot backups in 90 seconds for 6 GB db size?
If you could shed light on the technique, it would be helpful to us. We might also consider your approach, if feasible on our systems.
TIA, Rao
-----Original Message-----
Sent: Thursday, March 27, 2003 4:19 PM
To: Multiple recipients of list ORACLE-L
FWIW, we've got an 8.1.7 system set up on Solaris8. The whole whopping 6GB of datafiles are spread across a 6-wide RAID 0+1, with redos and archives on their own 0+1s.
Our hotbacks take 90 seconds.
OTOH, our 28GB ERP system on an HP AutoRAID 12H takes over 2.5 hours. I'd like to be done with that in 7 minutes, extrapolating from our other system, not to mention the performance increase for our users (system-wide waits average in the 100s during the day due to physical I/O, but that's a whole other kettle of worms).
:)
Rich
-- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Jesse, Rich INET: Rich.Jesse_at_qtiworld.com Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-LReceived on Fri Mar 28 2003 - 09:33:36 CST
(or the name of mailing list you want to be removed from). You may
also send the HELP command for other information (like subscribing).
![]() |
![]() |