[GE users] global (WAN) resource tracking?

Ron Chen ron_chen_123 at yahoo.com
Wed Aug 18 07:49:04 BST 2004


Also related is the flexlm license proxy mentioned on
this mailing list several months ago. (search the
archive for more info)

 -Ron


--- Stephan Grell <stephan.grell at sun.com> wrote:

> Hi Rod,
> 
> a possible solution would be the use of a global
> consumable, which is 
> implemented as a load value. You can have a counter
> somewhere
> in your WAN. When a job is started, decrease the
> counter and increase 
> it, when the job is finished. The change is reported
> as a load
> value to all the different grids. Since the update
> might take a some 
> time, a consumable can be used to keep track of
> recent changes in
> the grid.
> 
> The setup would not be trivial, but it should be
> possible.
> 
> Does it help?
> 
> Stephan
> 
> Rod.Rebello at Microchip.com wrote:
> 
> >
> > Hi,
> >
> > We have remote site SGE grids in place and want to
> have users at those 
> > sites be able to submit jobs that use wide-area
> network (WAN) licenses 
> > for various software packages.  The WAN licenses
> are accessible to all 
> > sites, but have to be tracked so only the amount
> available are used 
> > across all sites.  The software will run at the
> local site where the 
> > job is submitted and checkout a WAN license from a
> usually remote 
> > server (can both be at same site).
> >
> > Basically all grid installations have to be aware
> when a WAN license 
> > resource is in use so they are not over allocated.
> >
> > Our current solution is to have all remote sites
> submit dummy jobs to 
> > a "master" grid that tracks WAN resource usage. 
> The job will only 
> > execute at the remote site when the dummy job is
> successfully 
> > executing on the master with the allocated license
> resource.  The 
> > master job terminates when the remote job
> completes, thereby returning 
> > the license resource.  While this mostly works, it
> is fairly 
> > cumbersome and error prone.
> >
> > Is there a better way to handle this?   Ideally, I
> would like to have 
> > a concept of local and global resources.  Local
> resources are only 
> > known by the local grid site, and global resources
> are shared and 
> > tracked across sites.
> >
> > I have looked at the TOG project (transfer-queue
> over globus) but this 
> > solves a different problem.  We don't need to
> submit jobs to remote 
> > grid sites through firewalls.  We can already do
> this through our 
> > internal WAN, which is essentially how we have
> implemented our current 
> > solution.
> >
> > Thanks for any advice.
> >
> > - Rod
> >
> > ----------------------------------------
> > Rod Rebello
> > Director of CAD
> > Microchip Technology Inc.
> > 480-792-7502 
> 
> 
> 
>
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