Elapsed DB SIZE USED TAPE DISK PROCESSOR OS/390 TSM Ver time 1 Hour 11.7G 75% 3494/3590 RVA 9672-R14 2.10 4.1.2 Hour 41 Min 9.3G 54% 3494/3590 RVA 9672-R52 2.10 4.1.2 Hour Sam Sheppard San Diego Data Processing Corp. -----------------------------------------------------------------------` ---------------------------- Top of message ---------------------------- >>--> 06-27-01 06:50 ..NETMAIL () Database backup performan Date: Wed, 27 Jun 2001 09:37:11 -0400 From: "Zoltan Forray/AC/VCU" <[EMAIL PROTECTED]> Subject: Database backup performance To: [EMAIL PROTECTED] _________________________________Top_of_Message_________________________________ Any suggestions on how to improve DB backup performance ? Doing a FULL DB backup of our 15GB ADSM (yes, not TSM YET. Hoping to convert to 4.1.3 RSN !!) server, sometimes takes 4-hours. Since I read a previous message about someone having a 52GB DB, I was wondering how long it takes to backup that much DB since my meager DB takes sooooo long ? Note, there is no "operator delay" since it goes to a 3494 ATL, using 3490E drives. I was thinking about moving it to 3590 MAGSTAR but wasn't sure if it would make much of a difference since the only real change would be reduction/elimination of tape mounts (currently uses 9-cartridges). Since it is a robot, this would save a few minutes at most. I have tried increasing the BUFPOOL value (from 32MB to 80MB) with little noticable improvement. I still haven't reached/sustained the illusive 98% Cache Utilization ! Since the ADSM address space working set size has often exceed 110MB, I was wondering what was reasonable (or expected) for thise size DB. How much further should I increase the BUFPOOL value ? =========================== Zoltan Forray Virginia Commonwealth University University Computing Center e-mail: [EMAIL PROTECTED] voice: 804-828-4807 -----------------------------------------------------------------------`
