Re: [HTCondor-users] condor_userprio

[Todd Tannenbaum <tannenba@xxxxxxxxxxx>]

On 8/26/2018 8:40 AM, Alessandra wrote:
> Hi,
>
> i'm trying to adjust the fair shares and priorities in condor. One of 
> the things that I don't understand is why the condor_userprio tool 
> doesn't report the configured priorities but seems to report random numbers.
>
> for example I have condor_userprio reporting
>
> group_atlas.pilot = 10000
> group_atlas.production = 10000
>
> But the priorities configured are
>
> GROUP_PRIO_FACTOR_group_atlas =Â 10.0
> GROUP_PRIO_FACTOR_group_atlas.pilot =Â 10.0
> GROUP_PRIO_FACTOR_group_atlas.production =Â 10.0
>
> it really should be 10 even if I didn't explicitely declared them 
> because the group_atlas is 10. 10k is the default and 1000 I'm not sure 
> where it comes from. 

Hi Alessandra,

Do the below groups have a group quota?  In other words, do you have in 
your config a GROUP_NAMES entry and for each group a GROUP_QUOTA_* entry ?

If so, please be aware that these hierarchical groups themselves do not 
have a priority factor. The historical fair share scheduling in HTCondor 
is only applied to users, not to groups, so all the parameters dealing 
with historical fair share scheduling (like real user priority, 
effective user priority, and priority factor) have no meaning with 
respect to groups.  All setting GROUP_PRIO_FACTOR_<groupname> does is 
set the default priority factor for a new user that submits into that 
group for the first time.  I am guessing this is not what you thought it 
did.

Instead of historical fair share, the group scheduling is controlled 
solely by GROUP_SORT_EXPR, which defaults to "starvation group order." 
That is, the group whose current usage is the smallest fraction of its 
quota goes first, then the next, and so on.

I realize I did not directly answer you question(s) below, but given the 
above information, I am guessing that you really didn't mean to apply a 
priority factor to groups in the first place.  Perhaps if you told us 
your desired scheduling policy someone could better assist...

Hope the above helps,
regards,
Todd