IBM has VTFM (which is diligent/copycross, etc). Why do we need this product
or use this product while we can directly intercept and direct
allocations to a particular storage group (such TMMGROUP) with disk volumes,
let's say a dedicated set aside pool from a storage device? With extended
datacla
W dniu 2010-11-22 17:30, techie well wisher pisze:
IBM has VTFM (which is diligent/copycross, etc). Why do we need this product
or use this product while we can directly intercept and direct
allocations to a particular storage group (such TMMGROUP) with disk volumes,
let's say a dedicated set asi
Radoslaw,
Disclaimer: I am a TMM bigot, and I agree 110% (one hundred and ten percent)
with the OP.
>
> TMM is disk cache backed with real tapes.
[Ron Hawkins]
I don't quite agree with your definition. TMM can be, and often is migrated
and stacked onto to tape but the disk caching does not need
Maybe phrasing your question differently would be what are the
advantages and disadvantages of physical tape data versus a tape-on-
disk approach?
TMM is a methodology, which temporarily stages tape data on Level 0
disk and then the TMM pool is managed by DFSMShsm or equivalent to
consolidate t
Thanks everyone. Much appreciated. With TMM, of course it goes to expensive
z/os disk, but we do have the option of tiering within the array, such as
using 1tb drives Raid6 and then hsm them to replicated vts later.
On Nov 23, 2010 4:39 AM, "Michael W. Moss" wrote:
> Maybe phrasing your question d
Techie well wisher,
>
> Thanks everyone. Much appreciated. With TMM, of course it goes to
expensive
> z/os disk, but we do have the option of tiering within the array, such as
> using 1tb drives Raid6 and then hsm them to replicated vts later.
[Ron Hawkins]
That's not actually true. Cheaper midr
Tiering within the array is the best approach with replication. Synchronous
or Asynchronous, Tiering within the array provides better consistent point
at the recovery site.
On Tue, Nov 23, 2010 at 11:49 AM, Ron Hawkins wrote:
> Techie well wisher,
>
> >
> > Thanks everyone. Much appreciated. Wit
Behalf Of
> techie well wisher
> Sent: Tuesday, November 30, 2010 10:56 AM
> To: IBM-MAIN@bama.ua.edu
> Subject: Re: [IBM-MAIN] VTFM vs TMM
>
> Tiering within the array is the best approach with replication.
Synchronous
> or Asynchronous, Tiering within the array provides bette
lized midrange arrays for a TMM pool (or
> anything else).
>
> Ron
>
>> -Original Message-
>> From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On
> Behalf Of
>> techie well wisher
>> Sent: Tuesday, November 30, 2010 10:56 AM
>> To: IBM-M
nframe Discussion List [mailto:ibm-m...@bama.ua.edu] On
Behalf Of
> techie well wisher
> Sent: Friday, December 03, 2010 7:44 PM
> To: IBM-MAIN@bama.ua.edu
> Subject: Re: [IBM-MAIN] VTFM vs TMM
>
> Ron...thanks. I think this is possib
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