Re: [Condor-users] Can CONDOR emulate resources

[Tim St Clair <tstclair@xxxxxxxxxx>]

It is not advised to overload a machine to such a level b/c you can render it useless.  

Cheers,
Tim

----- Original Message -----
> From: "Brian Candler" <B.Candler@xxxxxxxxx>
> To: "Condor-Users Mail List" <condor-users@xxxxxxxxxxx>
> Sent: Tuesday, August 14, 2012 2:03:18 AM
> Subject: Re: [Condor-users] Can CONDOR emulate resources
> 
> On Tue, Aug 14, 2012 at 06:48:45AM +0000, Yuval Leader wrote:
> >    1.      I would like to use CONDOR with a single server
> >    emulating many
> >    servers, for testing purposes. Since I do not have all the
> >    execute
> >    machine yet, I would like one real server to mimic the behavior
> >    of the
> >    daemons running on the execution machines, for many machines. By
> >    “many”
> >    I target 1000-5000 servers. What is the best way to do it ?
> > 
> >    2.      The per-execute machine resource attributes (such as
> >    cpu,
> >    memory, state etc) is now stored in a file. How do I take this
> >    data and
> >    send it to the condor pool as if it came from condor_startd
> >    running on
> >    the real servers ?
> 
> Run multiple instances of condor_startd?
> 
> http://research.cs.wisc.edu/condor/manual/v7.8/3_3Configuration.html
> 
> "This syntax has been further expanded to allow for the specification
> of a
> local name on the command line using the command line option
> 
>   -local-name <local-name>
> 
> This allows multiple instances of a daemon to be run by the same
> condor_master daemon, each instance with its own local configuration
> variable."
> 
> Whether 1000-5000 separate startd instances is realistic I don't
> know.
> 
> Taking this further, you could have 1000 VMs each running Condor.
>  This
> probably doesn't scale for full virtualisation, but it might using
> something
> like LXC or OpenVZ.
> 
> >    3.      Is there a method to request a future job execution e.g.
> >    run on
> >    a required resource starting in 2 weeks for 1 day, and still get
> >    a
> >    confirmation now that the resource will be indeed claimed.
> 
> AFAIK there's no way of doing advance reservations. The job sits in
> the
> queue until some machine is ready to take it.  You can set up your
> job
> ClassAd so that it *won't* execute except in a time window that you
> choose,
> but when that time comes along, it'll have to fight with all others.
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