The TSM developers are actually considering making dedupe for tape
available some time in the future, for long term archiving purposes with
little restores it could be a very usefull.

And Wanda, diskpool dedupe doesn't make any sense because it is made for
short term storage of data (let's say 1-2 day's max), deduping and than
reduping the data when offloading to tape would be a bit silly.

Regards,
  Stefan

-----Oorspronkelijk bericht-----
Van: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] Namens Mehdi
Salehi
Verzonden: zaterdag 7 november 2009 16:35
Aan: ADSM-L AT VM.MARIST DOT EDU
Onderwerp: Re: [ADSM-L] de-dup on tapes

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?

Thanks