Greetings! I'm returning to the OSCAR devel list now as a user
rather than a developer. :-)
We are using OSCAR for some of my MPI development clusters in Cisco.
I have noticed a few problems with OSCAR 5 on RHEL4U4 that I thought
I'd report here:
1. /etc/profile.d/ssh-oscar.[c]sh: the second thing these scripts do
is (bash version):
home=`getent passwd | egrep "^$user\:" | awk -F: '{print $6}' | tail -1`
In Cisco, our clusters are part of the corporate-wide NIS setup.
This means that "getent passwd" downloads a 7+MB file with over
100,000 containing entries. This means that a single login takes
almost 2 minutes while this download is going on as part of normal /
etc/profile.d/*.sh processing. Yikes!
Is there a reason that the following form is not used instead:
home=`getent passwd $user | awk -F: '{print $6}' | tail -1`
As far as I can tell, this just downloads the single user's record
(which is darn near instantaneous). If there's portability problems
with this approach (I don't know if "getent" on different Linux
distros takes different argv), perhaps something like this could be
used (untested -- just typed out here in my mail client):
home=`getent passwd $user`
if test "$?" != "0"; then
home=`getent passwd | egrep "^$user\:"`
fi
home=`echo $home | awk -F: '{print $6}' | tail -1`
2. If I build an oscar image and then go back, make some changes, and
then try to build it again, I get a popup box saying "Are you sure
you want to overwrite this image?" (paraphrase). If I click "yes",
it fails to build the image. I have to name my new image something
different than the original image. Is there a reason for this?
That's it so far. Thanks!
--
Jeff Squyres
Server Virtualization Business Unit
Cisco Systems
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