Re: Seeking wisdom on dedupe..filepool file size client compression and reclaims

2009-08-30 Thread Grigori Solonovitch
Hello Stefan, I do not think you can use client compression and de-duplication together. De-duplication is skipping all data compressed by TSM Client or TSM Server. By the way, de-duplication process is trying to reduce files, compressed by operating system (for example, *.Z, *.zip, AIX system ima

Re: Seeking wisdom on dedupe..filepool file size client compression and reclaims

2009-08-30 Thread John D. Schneider
Greetings, The size of the volumes can be very relevant. Any of us who has managed a large virtual tape environment has run into this same issue. If you have 10TB in your pool, it would be a tempation to define 100 volumes of 100GB. That might not create any problem if you have a relatively s

Re: Seeking wisdom on dedupe..filepool file size client compression and reclaims

2009-08-30 Thread John D. Schneider
I don't remember seeing this in writing anywhere. I this a fact, or a supposition? Does deduplication in TSM skip all data that has been client compressed? I could see how that might affect the deduplication algorithm, but if that is true, the customer is left with an unfortunate deal with the D

Re: Daily TSM maintenance schedules

2009-08-30 Thread John D. Schneider
Roger, If you find a solution to that last problem, i.e. only 24 hours in a day, please post it to the list. :-) I am trying to understand the schedule you present. Are you saying you run expiration at the same time your backups, backup stgpools, and migration are running? Or do you run

Re: Seeking wisdom on dedupe..filepool file size client compression and reclaims

2009-08-30 Thread Roger Deschner
On Sat, 29 Aug 2009, Stefan Folkerts wrote: >TSM guru's of the world, > >Also client compression, does anybody have an figures on how this effect >the effectiveness of deduplication? >Because these are both of interest in a filepool, if deduplication works >just as good in combination with compress

Re: Seeking wisdom on dedupe..filepool file size client compression and reclaims

2009-08-30 Thread John D. Schneider
Greetings, I already responded to a similar post today that was also about client compression, and I don't want to waste listserv bandwidth beating the same drum, but... I am going to. If you are sick of this subject, don't read further. What we mean by "best" is highly subjective. Hard

Re: Seeking wisdom on dedupe..filepool file size client compression and reclaims

2009-08-30 Thread Bill Boyer
I do know from the beta program that 2 rules of files being skipped during the de-dup (identify) process are: 1. Encrypted files are skipped. 2. Small files. I think < 4k was the rule. There are some STE webcast events on De-dup that might list all the reasons. And then there's the DSMSERV.OPT

3584, VIO, TSM, and bad eject behavior...

2009-08-30 Thread Wanda Prather
Well, I"m confused again. Just set up TSM for a customer with a TS3500 (3584). Three logical partitions in the library, one for a for VTS, 1 for mainframe, 1 for TSM. ALMS installed, VIO enabled. TSM partition has 4 drives, 255 VIO slots. Have assigned the TSM tape volser range to the TSM partition