We use to use journaled mirrored file systems, but found that Raw Mirrored local provides us better I/O, now we are using Raw volumes on EMC Disk for stgpools which works even better because the disk is mirrored on the back end of the EMC Symetrix.
-----Original Message----- From: William Rosette [mailto:[EMAIL PROTECTED]] Sent: Friday, February 07, 2003 8:19 AM To: [EMAIL PROTECTED] Subject: PMR 02528, 082 Does any TSM gurus have any suggestions for our AIX admin Thank You, Bill Rosette Data Center/IS/Papa Johns International WWJD ----- Forwarded by Bill Rosette/IS/Corporate/Papa Johns on 02/07/2003 09:20 AM ----- Steven Schraer To: [EMAIL PROTECTED] 02/06/2003 05:09 cc: Bill Rosette/IS/Corporate/Papa Johns PM Subject: PMR 02528, 082 We are having some problems with the first link below. The second is working. I have been looking at the Redbook. Gettting started with Tivoli Storaage Manger: Implementation Guide. It looks like for storage pools are recommend for raid 0 (mirroring), raid 0+1 (mirroring & stripping) or raid 5 (distributed parity). These are safe methods to protect the storage pool. Do you know of any companies that use just raid 1 (stripping) on their storage pools? Is there an issue of tsm loosing a storage pool and the database having issues due to the lost storage pool data? Also there is no suggested raid for the tsm database. Since we mirror the tsm database with the tsm software, can we use raid 1 (stripping) so that we can get a performance increase on accessing the database? Or should we just create the volume group with no raiding but lay the database over multiple smaller disk (i.e. use eight 18.2 Gig disk instead of 4 36.4 Gig disk). What will give us the best performance. Can I get an answer on this tomorrow morning. I have a meeting to discuss the performance issues tomorrow (Feb 7, 2002). Thanks for your assistance! Steven M. Schraer 502-261-4148 ----- Forwarded by Steven Schraer/IS/Corporate/Papa Johns on 02/06/2003 04:57 PM ----- Bill Rosette To: Steven Schraer/IS/Corporate/Papa Johns@Papa Johns 02/06/2003 03:51 cc: PM Subject: PMR 02528, 082 Could not get into the link below. Thank You, Bill Rosette Data Center/IS/Papa Johns International WWJD ----- Forwarded by Bill Rosette/IS/Corporate/Papa Johns on 02/06/2003 03:53 PM ----- Stephen Hull <[EMAIL PROTECTED] To: [EMAIL PROTECTED] > cc: Subject: PMR 02/06/2003 03:36 PM Hi Bill, Here is a link to the Performance Tuning Guide on the web: ftp://w3.ibm.com/support/ats/documents/TSM42PDG.pdf Regards, Stephen Hull IBM Tivoli Storage Manager Support More questions? Search our new TSM KnowledgeBase at: http://www-3.ibm.com/software/sysmgmt/products/support/IBMTivoliStorageManager.html
