I'm going to build a new database cluster using OPS 8.1.7.
I have a question about the OFA standard and rule 10.

It states:
OFA 10

If you are using Oracle Parallel Server,
select exactly one node N to act as Oracle adminis-
trative home for the cluster to house the
administrative subtree defined in rule OFA 5. Let h
be the Oracle software owner's login home directory
on node N. Create a directory named for each in-
stance accessing database d within the adump,
bdump, cdump, logbook, pfile, and udump direc-
tories of N:h/admin/d. On every node n in the
cluster except N, mount the remote directory
N:h/admin/d as the administrative directory for
database d (i.e., as n:h/admin/d).

An 2-node example of the udump directory:

These directories would exist on node1 (the admin
node):
/u01/app/oracle/admin/mydb/udump/mydb1
/u01/app/oracle/admin/mydb/udump/mydb2

On node 2 the admin dir would be mounted as
node1:/u01/app/oracle/admin/mydb /u01/app/oracle/admin/mydb

And hence, both instance directories would be
accessable to either node

This doesn't seem like a reasonable rule from
a high-availabliity standpoint.  If node1 fails,
the admin directory on node2 disappears.

Am I missing something?

I am contemplating building a separate
/u01/app/oracle/admin/mydb
on both nodes.

Then, on node1 I could mount node2 as
node2:/u01/app/oracle/admin/mydb /u01/app/oracle/admin2/mydb

and then on node2 mount node1's admin dir as
node1:/u01/app/oracle/admin/mydb /u01/app/oracle/admin1/mydb

I have separate admin trees for high-availablity, but
can still reference both conveniently like the following
command to list trace files:

ls -lrt /u01/app/oracle/admin*/mydb/udump/*.trc

What have others done?


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