Hello all,
Does there has to be a 1-to-1 correspondence between pool account usernames from the CE to all WNs ? ie. Can I have let's say for example,
On my CE: dteam001...dteam050, lhcb001...lhcb050, ...
And then on the first WN: dteam051...dteam100, lhcb051...lhcb100, ...
Then on the second WN: dteam101...dteam151, lhcb101...lhcb151, ...
and so on, until all working nodes have different username ranges for pool accounts ?
Is it possible to do this from torque point of view ? Or does the pbs_server needs to have the same usernames for server & mom services (ie ce usernames & wn usernames).
I'm trying to do a shared virtual disk on a SAN fabric for using it as scratch space for the WNs. I was wondering if I could do this and if it is recommended...
Planned design:
To have all WN mount each pool account home directory over NFS from a mount point on the CE.
The CE will then be connected to the SAN Fabric via fiber channel, hosting the shared virtual disk on the SAN fabric.
The shared virtual disk will have only one volume containing all home directories for all WN pool accounts usernames.
This way, storage space won't be wasted as directory contents constantly changes over and over again.
Therefore, whenever a WN tries to execute a job it will use a unique home directory for the unique username among all WN.
This permits us not to create a volume for each WN.
This was thought of because, (maybe) not every job submitted to our site will need a 10GB scratch space on single moment (worst case scenario). Therefore, we can think of creating a hypothetical smaller virtual disk for serving all WN at the same time.
The main reason for doing this is that, we have some WNs that have laptop hard disks. This disks are not very suitable for doing some very demanding writings as they are not very reliable. With this method (maybe) we can extend the hard disk lives, therefore increasing WN availability. By doing this, each WN will use its local hard disk for storing OS configuration and handling services.
Any suggestions/critics will be very appreciated.
Best Regards,
./MS
|