Re: [HTCondor-users] drawbacks of NEGOTIATOR_INFORM_STARTD = False

[Greg Thain <gthain@xxxxxxxxxxx>]

On 01/30/2014 10:35 AM, Todd Tannenbaum wrote:
> On 1/30/2014 2:11 AM, Pek Daniel wrote:
> > Hi,
> >
> > Is there any drawback of setting NEGOTIATOR_INFORM_STARTD to False?
>
> One downside is if, for whatever reason, it takes the schedd a while 
> to get around to claiming a startd given to it by the negotiator.  
> E.g. maybe the submit machine is very busy, or maybe the schedd is 
> given a very large number of machines to claim all at once, etc.  In 
> this case, you run the risk of the negotiator matching a startd to 
> scheddA, and then matching it again to scheddB in a subsequent 
> negotiation cycle because the startd will stay in Unclaimed state.  If 
> NEGOTIATOR_INFORM_STARTD is True (the default), the startd will go to 
> Matched state and thus the negotiator will not give it away again.

Note that the first schedd to use the claim on the startd will "win", 
and the subsequent use of that same claim be rejected by the startd as 
invalid, forcing the second schedd to go to the negotiator to get new 
matches.

-Greg