Re: [HTCondor-users] Dynamic slots and concurrency...

[Michael V Pelletier <Michael.V.Pelletier@xxxxxxxxxxxx>]

"HTCondor-users" <htcondor-users-bounces@xxxxxxxxxxx>
wrote on 11/05/2015 06:27:03 PM:

> From: Todd Tannenbaum <tannenba@xxxxxxxxxxx>
> To: HTCondor-Users Mail List <htcondor-users@xxxxxxxxxxx>
> Date: 11/05/2015 06:28 PM
> Subject: Re: [HTCondor-users] Dynamic slots and
concurrency...
> Sent by: "HTCondor-users" <htcondor-users-bounces@xxxxxxxxxxx>
> 
> On 11/5/2015 3:40 PM, Jody Pearson wrote:
> > Hi all,
> > 
> > I'm wondering if concurrency limits are supposed to word with
dynamic 
> > slots ?
> > 
> 
> Yes, BUT you will likely want to configure HTCondor to use "Consumption
> Policies", which are not enabled by default.  See 
>   https://htcondor-wiki.cs.wisc.edu/index.cgi/wiki?p=ConsumptionPolicies
> for more information.

This puzzles me, since as far as I can tell over the
past three years, my dynamic slots with partitionable leftover claiming
have not run into any oversubscription problems with the MATLAB license
concurrency limit. I did try switching to consumption policies when they
first came out, but ran into what must have been bug 4945 where claimed
slots hung in the Matched state, so I went back to CPL.

I suppose I should take a closer look at this. What's
the right way to determine the negotiator's current tally for a given concurrency
limit? Could my lack of noticeable problems be a result of using a single
centralized scheduler  via SCHEDD_HOST = <hostname> instead
of per-machine schedulers?

-Michael Pelletier.