From: Carlos Rodriguez (crodriguez@eliop.es)
Date: Fri Jul 04 2003 - 05:44:13 EDT
Here is my original question:
> Hello Managers. I am working on a Tru64 TruCluster V5.1A Patch Kit
3
> and I have a doubt with the CAA. I have two nodes on the cluster
and
> my customer wants me to configure its own cluster services in such
a
> way that this services are always running in the same node. That
means
> if all services are running on node "node1" and, for example, node
> "node2" comes up, my customer does not want the cluster to
recalculate
> the placement policy. I do not kown how to disable this
recalculation
> even if it is possible. Thanks in advance. Goodbye.
> Hello again managers. I do not think I explained very well last
> question about CAA placement policy question. My problem is the
> following:
>
> I have seven CAA services that I want them to run always on the
> same node on the cluster, but this does not mean that I want them
to
> run on node "node1". And what's more, I need to relocate them
manually
> in an independent manner.
> For example, consider the following scenario:
>
> - Node "node1" is up and my seven CAA services are running on it. -
> Now, I boot up node "node2". Once "node2" is up, I do not want the
> cluster to recalculate placement policy. So, my seven CAA services
> will be still running on it.
> - Now, I want to relocate manually one and only one of the CAA
> services using the caa_relocate -f command.
>
> The reverse situation ("node2" was up and I booted up "node1")
have
> to be possible, too.
>
> Thanks in advance.
Here are the responses:
Peter.Wolfe@hp.com: He suggested me to use "restricted policy
placement" without auto-failback.
joe.carrico@Cummins.com: He suggested me to use "restricted policy
placement".
orendorf@hp.com: He suggested me to use "resources optionally
required" in order to relocate them manually in an independent
manner, and he told me to put ACTIVE_PLACEMENT=0 in order not to
evaluate the placement policy everytime a new node is added to the
cluster.
bob.marcan@aster.si: He suggested me to use "favored policy
placement".
Bernard.Royet@ca.com: He suggested "restricted placement policy" and
ACTIVE_PLACEMENT=0
amardeep.joshi@hp.com: He suggested "balanced placement policy".
corinne.haesaerts@hp.com: He suggested "restricted placement policy"
Alexandre.Kardanev@ihep.su: He suggested me to use "required
resources"
My final solution is the following:
Configure all my services with ACTIVE_REPLACEMENT=0
Configure all my services with "Favored placement policy",
favoring node "node1".
With this:
1. I can manually relocate every service in an independen manner.
2. When I run the services with caa_start in the beginning, all are
located in the same node "node1".
3. If I reboot one of the nodes of the cluster, my services are not
relocated anyway.
Thanks to all !!.
Regards,
Carlos Rodriguez del Castillo <crodriguez@eliop.es>
ELIOP, S.A.
Madrid-Spain
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