W dniu 2014-11-10 o 22:16, Ken Smith pisze:
Anyone out there sharing tape devices outside of a Sysplex?
I'd like to share stand-alone 3590, TS3500 Automated Tape Library (SMS
managed), and/or a VTS.
CA-1 is tape product. Seems they support their tape DB's shared with
reserve/release when separated by volume properly.
Sharing ATL would require sharing VOLCAT's which seems supported. Not
clear if GRS required for serialization of VOLCAT or if reserve/release is
sufficient. Does GRS require Sysplex or will CTC work? OAM planning says
systems should be in the same SMSPlex but I haven't seen that term fully
defined (same ACDS / SCDS?)
Autoswitch seems to require sysplex. Manual varying wouldn't be horrible
if all else works.
Thanks for any advice (other than getting a CF, which I see the value of
but not the guys with the $).
Provide more details. Your configuration and your real needs. There are
several solutions, suitable for different scenarios.
Some general remarks:
* For virtual tapes you have much more tape drives, so maybe you can
make static assignment devices to LPARs/systems. It's convenient.
* For real tapes the above could be unreachable due to lack of drives.
You can think about ATAM or similar solution.
* Sharing drives does not mean sharing tapes.
* You can share your tapes or not. You can assign set of tapes to every
LPAR/system.
* VOLCAT means IBM-like tape library. It is typical for 3494 and
successors, as well as VTS and successors, but it is not typical for
STK/Sun/Oracle libraries.
* Other solutions (MDL, Luminex) may use MTL (Manual Tape Library)
definitions.
* Already mentioned ATAM relieves nightmare or VARY ON/OFF drives.
* GRS is not required for VOLCAT sharing or SMSplex CDS sharing or any
other multi-host solution in concern. It can be "nice to have".
* OAMplex (VOLCAT sharing), SMSplex, CA1plex, etc. in ideal world should
be equal, but it is not required.
* GRS does not require sysplex, but it does require CTC (or sysplex).
* GRS for non-sysplex means ring configuration which is not very fast
and require some setup to behave as it should be. Think twice before
activationg it. (my humble opinion)
HTH
--
Radoslaw Skorupka
Lodz, Poland
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