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. <deehr...@louisville.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@VM.MARIST.EDU] On Behalf Of Hans > Christian Riksheim > Sent: Wednesday, November 30, 2011 11:23 AM > To: ADSM-L@VM.MARIST.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.