Re: [Veritas-bu] Understanding DSSU

It sounds like you have some jobs that are not destaging properly. I saw this whith 5.1 jobs after I upgraded from 5.1 to 6.5 and had to manually expire quite a few images from disk (after verifiying we had a copy on tape, of course).

Rusty Major, MCSE, BCFP, VCS ▪ Sr. Storage Engineer ▪ SunGard Availability Services ▪ 757 N. Eldridge Suite 200, Houston TX 77079 ▪ 281-584-4693
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Nate Sanders <sandersn AT dmotorworks DOT com>
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09/02/2010 11:57 AM

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Subject	[Veritas-bu] Understanding DSSU

We finally made it to NBU 6.5.6 and I was under the impression it had a feature that 5.1MP6 did not. I thought that DSSU on 6.5.6 was supposed to have the ability to spill over from one storage unit to the next. Meaning that if a single job was larger than the smallest DSSU it could overflow into another one. Or, if the if one DSSU only had 300GB free and the job was writing there, but was 500GB in total, the last 200GB would spill over. I've been having some really weird problems in DSSU since upgrading. I saw a 20GB job fail 5 times last night. I would flush all 6 DSSUs and rerun the jobs only to watch them all fail with Error 129 (unit is full). Here's our setup: Six 700GB DSSU's dssu1 & 2 == Storage Group for Production OS backups dssu 3, 4, 5 == Oracle Disk Staging dssu 6 == Staging Server environment's Disk Staging All DSSU's are set to 15% low water mark and 90% high water mark. Some flush every 4 hours, some every 5 hours, usually depending on the storage group, one will flush 4hrs one will flush 5hrs in the group. Prior to upgrading to 6.5.6 we only had 4 DSSU's, since then we added 5 & 6. Despite having more physical space, we're seeing more errors on jobs in Production OS and Oracle. Am I just not understanding something here? -- Nate Sanders Digital Motorworks System Administrator (512) 692 - 1038 This message and any attachments are intended only for the use of the addressee and may contain information that is privileged and confidential. If the reader of the message is not the intended recipient or an authorized representative of the intended recipient, you are hereby notified that any dissemination of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail and delete the message and any attachments from your system. _______________________________________________ Veritas-bu maillist - Veritas-bu AT mailman.eng.auburn DOT edu http://mailman.eng.auburn.edu/mailman/listinfo/veritas-bu

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