Thanks for your solution! This is exactly what I wanted. If I use a simple script like:
echo "DetectedBandwidth = 1000"
The machine classad just got correct attribute-value pairs to be advertised.
However, the only problem right now is that for the code I use to determines the ethernet link bandwidth, it requires sudo to run ( has ioctl() call inside ). If I set the callout executable to be this one, restart condor, and run condor_status, the machine slot does not show there. Do you know how to handle callout executables requires sudo permission? Thanks.
On 5/17/2013 10:23 AM, Zhe Zhang wrote:
I know that HTCondor support extensible machine resource. Links at
For example, if you want to advertise GPU as a resource, you can add the
following in your config files:
MACHINE_RESOURCE_NAMES = GPU
MACHINE_RESOURCE_GPU = 2
SLOT_TYPE_1 = cpus=100%,auto
SLOT_TYPE_1_PARTITIONABLE = TRUE
NUM_SLOTS_TYPE_1 = 1
Now I have some resource, e.g. the bandwidth, which I also want to
advertise as a machine resource in this way. However, instead of hard
coding each machine with a specific value for bandwidth, I want it to be
generalized as for different machine, I could dynamically determine the
bandwidth resource (I have a piece of code does that) and put it in the
config file. Is there a way I can do that?
Hi Zhe! Yes, there is a way to do that (a few ways actually). One way off the top of my head would be to use MACHINE_RESOURCE_INVENTORY_<xxx> knob. This specifies a script to run at startup of the startd - the stdout of this script should spit out an attribute "Dectected<xxx>=y" for the extensible resource plus any other optional characteristics of the resource to advertise in the machine classad.
So instead of doing:
# declare a local resource quantity directly in config
MACHINE_RESOURCE_railgun = 8
You could do something like this:
# specify a script to run that returns local resource inventory with
# other optional attributes to be advertised in slot ads
MACHINE_RESOURCE_INVENTORY_railgun = /bin/railgun_inventory.sh 8 0.95c
where railgun_inventory.sh look like this:
echo "DetectedRailgun = $1"
echo -e "RailgunMuzzleVelocity = \"$2\""
P.s. If you do not specify "MACHINE_RESOURCE_NAMES", the startd should be able to figure it out automatically by searching for all the MACHINE_RESOURCE_* and MACHINE_RESOURCE_INVENTORY_* knobs...
Hope the above helps,
Department of Computer Science and Engineering
University of Nebraska-Lincoln
Lincoln, NE, 68588