I'd say it would be dangreous to share the DRCT areas between 2 VM systems:
A DIRECTXA on one system can update the 'inactive' DRCT cylinders any way it
likes. Suppose two DIRECTXA commands are executed on one system before the
second system had a chance to refresh it's DRCT knowledge. CP in the second
system might be reading the some DRCT cylinders while the first system is
updating those cylinders. Unpredictable things will happen, similar to CMS'
famous "error 3 reading file from disk" when someone updates a minidisk that
other users read.
2007/4/11, RPN01 <[EMAIL PROTECTED]>:
Doing the DIRECTXA command changes between the pair of directories within
the DRCT area. Would the second system notice the change via the Diag? I
can
see where doing a second DIRECTXA could cause serious problems. Are you
saying that if you do it to some other random pack, that would be enough
to
cause the second system to re-read the real dierctory?
Actually, with DirMaint and its dirmsat partner, keeping the two
directories
isn't really a problem, and I don't have to log into the other system to
take care of the directory. Programmers are essentially lazy people, so I
don't want to recreate work that I can have handed to me....
--
.~. Robert P. Nix Mayo Foundation
/V\ RO-OC-1-13 200 First Street SW
/( )\ 507-284-0844 Rochester, MN 55905
^^-^^ -----
"In theory, theory and practice are the same, but
in practice, theory and practice are different."
On 4/10/07 3:36 PM, "Rob van der Heij" <[EMAIL PROTECTED]> wrote:
> On 4/10/07, RPN01 <[EMAIL PROTECTED]> wrote:
>
>> Necessity is the Mother of all...
>
> He said, while cleaning his ears with the barrel of a gun :-)
>
>> There's always another way to do it. The simple fact that we run a CSE
>> complex from a single RES volume seems to amaze and amuse the IBM'ers
to no
>> end, and if I can confound them, I know I've done something right...
:-)
>
> Indeed. Have you considered to share you object directory as well?
> That might amuse many.
> You would run DIRECTXA on one system, and when that completed you make
> the other systems issue a Diag3C (iirc) to have them drop any cached
> portions of the object directory. If you want, you could make the
> "slave" system run another DIRECTXA to write an up-to-date on your
> spare RES volume. If you also want the update-in-place directory it
> may take a bit more tweaking...
>
> Rob
--
Kris Buelens,
IBM Belgium, VM customer support
