W dniu 2012-02-19 17:23, Edward Jaffe pisze:
On 2/19/2012 4:40 AM, R.S. wrote:
W dniu 2012-02-19 08:30, Edward Jaffe pisze:
On 2/18/2012 4:45 PM, Paul Gilmartin wrote:
Remember that if z/OS didn't impose a factitious limit on
volume size, there'd be little need for multivolume data sets.
In that case, widespread adoption of 1TB volumes on z/OS should
significantly decrease the number of multivolume data sets in use...
1TB ??? Why so huge? It's... it's... it's almost as much as single HDD
in my PC! <vbg>
What's especially cool is that mainframe volumes can by dynamically
configured to be any size between Mod1 and 1TB. If you ever run out of
space on a volume, just turn the "magic screwdriver" on the remote DASD
HMC (SSPC) to make the volume larger and keep on going. The new size is
immediately seen by z/OS.
Well, the same feature was available 12+ years ago on "windows" dasd
arrays. What is "warm" (not cool <vbg>) is that mainframe volumes CANNOT
BE always dynamically enlarged. It is available on some controllers
under some circumstances (set up).
What is cool is that SMS storage group. Usually users do not see the
volumes, they see dasd space. In case of shortage you can simply add
some volumes to the group. You can even buy new box and simply add it to
the group. And that's really cool IMHO.
--
Radoslaw Skorupka
Lodz, Poland
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