Re: [HTCondor-users] Question about making some nodes dedicated to a single user

[John M Knoeller <johnkn@xxxxxxxxxxx>]

To reserve part of a single machine for a specific user, you 
can create slot 'types' and give each type of slot a different start expression.  something like this.

This config assumes that DETECTED_CPUS = 18 and that you want to reserve static slots for your special user.
Slot type 2 could also be dynamic.

NUM_SLOTS_TYPE_1 = 1
SLOT_TYPE_1_PARTITIONABLE = true
SLOT_TYPE_1 = Cpus=10, Memory=10/18, Disk = 10/18

NUM_SLOTS_TYPE_2 = 8
SLOT_TYPE_2_PARTITIONABLE = false
SLOT_TYPE_2 = Cpus=1, Memory=1/18, Disk=1/18
SLOT_TYPE_2_START = Owner=="joe"
SLOT_TYPE_2_NAME_PREFIX = reserved


-----Original Message-----
From: HTCondor-users [mailto:htcondor-users-bounces@xxxxxxxxxxx] On Behalf Of Bansal, Vikas
Sent: Tuesday, March 28, 2017 11:53 PM
To: HTCondor-Users Mail List <htcondor-users@xxxxxxxxxxx>
Subject: Re: [HTCondor-users] Question about making some nodes dedicated to a single user

Marty,

Thank you. I will give it a try.
At this point I just want to isolate 10 slots/nodes for a specific user.
Its OK if the same user submits to another node as well.

It would be great to know if slot control can be managed as well. So 10 slots for a specific user. I assume it will easy to configure 10 slots on 10 different nodes than 10 slots on 1 node.
My nodes have ~18 slots/node.

Thank you for your help.
Vikas


On 3/28/17, 7:12 PM, "HTCondor-users on behalf of Kandes, Martin" <htcondor-users-bounces@xxxxxxxxxxx on behalf of mkandes@xxxxxxxx> wrote:

    Vikas,
    
    Well, if you only want to allow those nodes to be used by that one user, you could simply place the Owner attribute in the START expression within a configuration file in /etc/condor/config.d on those specific nodes .... 
    
    START = (Owner == "mkandes")
    
    Then only that username (on the schedd) should match on those nodes. However, this will not prevent the user from running on other nodes in the cluster as well (if you need them to ONLY run on those 10 nodes). If you need per slot control, I would imagine there is a more fine-grained way to construct the START expression. But I don't know off the top of my head. 
    
    Marty Kandes
    UCSD 
    
    ________________________________________
    From: HTCondor-users [htcondor-users-bounces@xxxxxxxxxxx] on behalf of Bansal, Vikas [Vikas.Bansal@xxxxxxxx]
    Sent: Tuesday, March 28, 2017 5:53 PM
    To: htcondor-users@xxxxxxxxxxx
    Subject: [HTCondor-users] Question about making some nodes dedicated to a       single user
    
    Hi,
    
    I have a condor batch system available at my site.
    
    $ condor_version
    $CondorVersion: 8.2.10 Oct 27 2015 $
    $CondorPlatform: X86_64-CentOS_6.7 $
    
    It has 1000 slots/nodes.
    
    
    I was wondering if it is possible to pick, say, 10 slots so that those 10 slots only accept/run jobs from a specific user A?
    If so how?
    
    I understand that a user can specify a node in condor JDL by specifying
    
    Requirements = TARGET.Name== slot9@cn154
    
    So then if slot9@cn154 can be configured to only receive jobs from one user, then the problem is addressed. But I am not sure if this is configurable.
    
    
    Thanks for your help.
    Vikas
    
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