You could make two stgpools, one collo and the other not.

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of 
Hans Christian Riksheim
Sent: Wednesday, November 30, 2011 12:31 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: Re: [ADSM-L] Collocaton by group

Thanks, that was counter intuitive to me and it should not be the
default setting for stgpools.

I have 1 node where I want collocation, the rest not. Then I should
make one collocgroup with that node in it. The rest of the nodes
should then be lumped together in another collocgroup. And every time
I add another node, I must remember to put it into the collocgroup
with all the others or tape usage will climb.

I think I just go for collocate=no.

Hans Chr.


On Wed, Nov 30, 2011 at 6:14 PM, Ehresman,David E.
<deehre01 AT louisville DOT edu> wrote:
> From Tsm Admin Reference:
> "GRoup
> Specifies that collocation is enabled at the group level for client nodes. The
> server attempts to put data for nodes that belong to the same collocation
> group on as few volumes as possible. If the nodes in the collocation group
> have multiple file spaces, the server does not attempt to collocate those file
> spaces.
> If you specify COLLOCATE=GROUP but do not define any collocation
> groups or if you specify COLLOCATE=GROUP but do not add nodes to a
> collocation group, data is collocated by node. Be sure to consider tape
> usage when organizing client nodes into collocation groups"
>
> The documentation is available online.
>
> -----Original Message-----
> From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf 
> Of Hans Christian Riksheim
> Sent: Wednesday, November 30, 2011 11:23 AM
> To: ADSM-L AT VM.MARIST DOT EDU
> Subject: [ADSM-L] Collocaton by group
>
> By default a stgpool has Collocaton=group.
>
> Does that mean it does no collocation if no collocaton groups are
> defined? Or does it collocate by node?
>
> We have a stgpool with collocaton=group but no collocaton groups
> defined and tape utilization is very low. Should we set
> collocation=no?
>
> Hans Chr.