From: Dr. Martin Körfer (koerfer@mpch-mainz.mpg.de)
Date: Thu Jun 30 2005 - 07:05:57 EDT
Hi managers,
we run a 2-node TruCluster V5.1a, PK6:
node 1: 1 EV6.7-Processor, 1280 MB Memory
node 2: 4 EV6.7-Processor, 8 GB Memory
running "sendmail" through the "Internet Express"-Software-package (provided for
alpha-clusters) as a "multi-instance service" on both nodes, I want
to run it preferably on the "4-processor-node2" and only performing failover
to -node1-, if -node2- shuts down.
I tried to succeed by running the service through creating the cluster alias
"mailer", to whom I provided high priority on -node2- and low priority on
-node1-.
However, if -node2- is used by other applications (NFS-Service, compute-service)
only for a short time, "mailer" switchs to -node1- and also if showing bad
performance it does not switch back to -node2-.
Have I used to litlle priority-values? Which values would you advice to receive
the desired behaviour ??
Is their any possibility to restrict switching only to the case of "shut down"
of -node2-??
Is there any other possibility to restrict multi-instance services (under normal
conditions, except ailover) to a special node (perhaps through the "Distributed
Lock Manager")??
I know: "read the fucking manaual"
But the Informations therein are so overwhelming that I would like to here about
a guidance of experienced mangers on this field.
Any help would be appreciated
Thanks in advance
Martin Körfer
-- Dr.Martin Körfer Max-Planck-Institut für Chemie Elektronik J.J.Becherweg 27 55128 Mainz Tel.: -49-6131-305488 Fax: -49-6131-305318 ------------------------------------------------- This mail sent through IMP: diotima.mpch-mainz.mpg.de ---------------------------------------------------------------- This message was sent using IMP, the Internet Messaging Program.
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