Hi We have a site backing up 20-25TB of data every night spread across 3 different instances running in 2 clusters. We use AIXASYNCIO on all of these server and it's certainly an I/O increase. If you're gonna use it, make sure you increase the number of AIO servers. You will notice abit more memory being used due to the use of ASYNC I/O, but it's well worth the memory. If you're using SAN volumes, other things to look at is increasing the queue_depth of your hdisks (default is usually to low). If you're using RAW devices for storagepools, you should also look at lowering the filesystem cache, since there's no really point in caching the database volumes, and RAW devices arent handled by the filesystem cache. Best Regards Daniel Sparrman
Daniel Sparrman Exist i Stockholm AB Växel: 08-754 98 00 Fax: 08-754 97 30 [email protected] http://www.existgruppen.se Posthusgatan 1 761 30 NORRTÄLJE -----"ADSM: Dist Stor Manager" <[email protected]> skrev: ----- Till: [email protected] Från: "Pagnotta, Pam (CONTR)" <[email protected]> Sänt av: "ADSM: Dist Stor Manager" <[email protected]> Datum: 09/27/2011 01:27 Ärende: [ADSM-L] AIXASYNCIO Hello, Anyone with experience with using the AIXASYNCIO server parameter on a version 6.2** TSM server running on an AIX v6.1 OS? We backup approximately 5TB of data nightly and although the performance is not bad, if this would make it better, we might have more time for administrative work. Just looking for some opinions from all the wonderful experience out there. Thank you, Pam Pam Pagnotta Sr. Systems Engineer Energy Enterprise Solutions (EES), LLC Supporting IM-621.1, Enterprise Service Center East Contractor to the U.S. Department of Energy Office: 301-903-5508 Email: [email protected] Location: USA (EST/EDT)
