[padb-users] start using padb on TORQUE

[Ashley Pittman]

On 25 Nov 2010, at 21:31, David Singleton wrote:

> On 11/26/2010 07:53 AM, Ashley Pittman wrote:
> 
>>> * We run all jobs under project groups which are not user login groups.
>>>  That causes grief for "rsh node gdb ..." type debugging because of
>>>  insufficient privileges.  Since this is a common problem for us, we
>>>  have a variant of newgrp that we can insert in remote commands to
>>>  overcome this, eg
>>>      rsh node nfnewgrp projgroup gdb ...
>>> 
>>>  Note that all variants of PBS support users nominating their jobs
>>>  execution group (the group_list/egroup job attributes) but I dont know
>>>  how commonly this is exercised.
>> 
>> In this context I'm assuming by group you mean a pbs concept and not a linux group (from /etc/groups), if it was the latter and usernames were the same this would be a non-issue.
>> 
> 
> I do mean Linux groups. ptrace appears to require matching gids.

I didn't know that!  Then I'm doubly intrigued to find out how you made it work, do you change the group of the inner padb processes or do you change the group of the spawned gdb process?

Ashley,

-- 

Ashley Pittman, Bath, UK.

Padb - A parallel job inspection tool for cluster computing
http://padb.pittman.org.uk