Re: Client based encryption issues

2009-11-07 Thread Wanda Prather
Step3: run a very small backup Make sure your users run a very small SELECTIVE backup (or in the GUI specify ALWAYS BACKUP). If they run an incremental backup, and the client finds nothing to back up (because it has been backed up already), you will not get the prompt for the encryption key. W

de-duplicating compressed data

2009-11-07 Thread Mehdi Salehi
Hi, What is the effect of compression on de-duplication? Does it help to reach a more de-duplication level? Thanks

Re: de-duplicating compressed data

2009-11-07 Thread Andrew Carlson
I am not an expert in this area, but I have been told by a number of Dedup vendors that compressed data cannot be deduped. YMMV, but it seems correct to me, because small changes in the file could potentially change much of a compressed file, depending on the compression method used. On Sat, Nov

de-dup on tapes

2009-11-07 Thread Mehdi Salehi
Hi, When using de-duplication, am I limited to using disk storage pools? (My answer is no, because de-duplication is done in software layer) Thanks

Re: de-dup on tapes

2009-11-07 Thread Wanda Prather
TSM dedup is actually limited to sequential type=FILE storage pools, on disk (A pool with type=DISK is a random-access pool.) AFAIK, no vendor is doing dedup on tape; when data gets moved out from disk to tape, it is "reduped" or "reinflated", or whatever you want to call it. This actually is sen

Re: de-dup on tapes

2009-11-07 Thread Mehdi Salehi
Thanks Wanda, I agree that is it sensible not to have de-dupe on tapes because pointers force to go backward and forward through the cartridge(s), so it is inefficient. What I don't understand is why type=file (which is similar to tapes in nature) supports de-dup, but disk (random access) does not?

Re: Win2008 System State

2009-11-07 Thread Wanda Prather
Hee hee! THANK YOU Andy! Wanda ;>) On Fri, Nov 6, 2009 at 1:53 PM, Andrew Raibeck wrote: > > It should be getting obvious to development that this architecture is > > doomed, and not gonna work for folks in the long term. Benefits we pick > up > > with the DB performance improvements in 6.1 (y

Re: Who is using Admin Center ?

2009-11-07 Thread Stef Coene
On Saturday 07 November 2009, Grigori Solonovitch wrote: > I never reported it, but after downooad TSM files from IBM sites for AIX > (the both are products of IBM) I often see unbelivable file extentions > like *.bin (it is not clear what to do at all with this file in terms of > AIX) or *.tar

Re: de-duplicating compressed data

2009-11-07 Thread Grigori Solonovitch
>>>What is the effect of compression on de-duplication? Does it help to reach a >>>more de-duplication level? This is my opinion (please correct, if something is wrong): 1) note we are talking about client compression (compression=yes for node or in dsm.opt). Hardware compression on drive level