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
Hi,
What is the effect of compression on de-duplication? Does it help to reach a
more de-duplication level?
Thanks
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
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
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
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?
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
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
>>>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