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Status Delivered
Workspace Spectrum LSF
Components Administration
Created by Guest
Created on Nov 8, 2021

RELATED IDEAS

Set the "+pref_level" for hosts or host_groups in lsb.hosts

Currently it's possible in lsb.queues to set the "+pref_level" for hosts or host_groups in the "HOSTS" section to prioritize some hosts for job submission.


We have various host groups defined in lsb.hosts and would like to set the +pref_level for some hostgroups already in lsb. hosts (e.g. in an own hostgroup definition to be further used in lsb.queues for some queues).



For example we have defined in lsb.hosts:


hgroup1 (server1 server2 server3)

hgroup2 (server4 server5 server6)

hgroup_all (hgroup1 hgroup2)


It would be nice to be able to configure something like:


hgroup_all (hgroup1+2 hgroup2)


To be further used in lsb.queues.



Needed By Not sure -- Just thought it was cool
  • Admin
    Bill McMillan
    Reply
    |     Jun 21, 2022

    Addressed in Service Pack 13

  • Admin
    Bill McMillan
    Reply
    |     Dec 14, 2021

    We think that this is a good idea, but at the same time we don't want to break existing behaviour.


    When +preference is specified on the command line, the values are relative to that specific clause, thus "-m grpA+2 grpB+1 grpc" is the same as "-m grpA+500000 grpB+12 grpC+3"


    If we allow +preference to be specified within the group definition, we need to preserve the existing behaviour, for example given the definitions:


    grpA (h1 h2)

    grpB (h3+10 h4)

    grpC (h5+5 h6)

    grpD(grpA+2 grpB+1 grpC)


    "-m grpA+2 grpB+1 grpc" and "-m grpD" need to evaluate the same, and need to be consistent with current behaviour, otherwise many customers will suddenly find hosts in different orders.


    More specifically, irrespective of definitions within grpB, no host within grpB will be more important than those in grpA


    To achieve this, +preference will only be evaluated at the top level, and we will not recursively evaluate individual groups.


    grpD is effectively expanded to "h1+2 h2+2 h3+1 h4+1 h5 h6"


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