Hi Farren ,
you can have it all. If you set the stg to group-collocation and
want a group or even a single node to be collocated then you set
up the collocation groups with the number of members as needed.
We only use group-collocation and if a single node should be collocated then
we just define one collocation-group with one member. This acts like 
node-collocation.

When you change your stg from node- to group- collocation
note that the currently Filling-Volumes possibly won't be written again. It's 
no problem
but after some time you may identify those volumes (by the filling-status and 
an old
"Approx. Date Last Written" ) and simply move those volumes with
'move data <volumename> reconstr=yes'. The output of that data will be
written to those volumes you expect (group-collocation).
It's just for saving empty slots ...

Rainer




Sam Rawlins schrieb:

Hi Farren,

As per the Admin Guide > Configuring and Managing Server Storage > Chapter
10 > Keeping a Client's Files Together > Planning for and Enabling
Collocation, located here:
http://publib.boulder.ibm.com/infocenter/tivihelp/v1r1/topic/com.ibm.itsmcw.doc/anrwgd55330.htm#colplan
you are correct; when collocation is set to 'group,' data belonging to nodes
which are not members of a collocation group is stored "on as few volumes as
possible."
This text is found in the 5.4 and 5.5 Admin Guides. The Admin Guide for 5.3
was not as specific.

On Tue, Nov 25, 2008 at 3:56 AM, Minns, Farren - Chichester <
fminns AT wiley DOT com> wrote:

Hi all

I currently have a tapepool collocated by node.

I have created my first collocation group and added three client nodes to
it.

So, if I now update the tapepool to collocate by 'group', am I right in
thinking it will still collocate all nodes NOT in the collocation group by
node?

Thanks

Farren Minns


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kiz - Abt. Infrastruktur           Tel/Fax:      ++49 731 50-22482/22471
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