Re: [HTCondor-users] Requirement about network interface speed

[Michael V Pelletier <Michael.V.Pelletier@xxxxxxxxxxxx>]

Sure! I gather there's some development
work underway on network bandwidth as a resource, but in the meantime,
here's what I've done.

I have a startd_cron job that runs a
"condor_netspeed" script. I have it running hourly rather than
as a benchmark job because in some cases we use bonded interfaces, which
means that if one link goes down, the network may still be running but
at a lower speed.

It defines a NetworkMbps attribute,
included in the STARTD_ATTRS list, plus a couple of others like HasSlowNetwork
which is True if it's 2Gb/s or less, and HasTenGigabitNetwork if it's more
than 10Gb/s so submitters can use those simple Booleans if desired.

The script is quite simple - it runs
"ip route show" to find the interface name of the default route
-- since Dell machines by default use BIOS devnames under RHEL6 and the
primary interface may be em1 (embedded port 1) or what have you, rather
than the customary "eth0" -- and then looks at both /sys/class/net/$iface/slave_*/speed
(used by bonded interfaces) and /sys/class/net/$iface/speed (non-bonded
interfaces), and sums the megabits per second to arrive at the NetworkMbps
number.

So then the submitter can say "requirements
= TARGET.HasTenGigabitNetwork" and their jobs won't run on anything
less.

	Michael V. Pelletier IT Program Execution Principal Engineer 978.858.9681 (5-9681) 339.293.9149 cell michael.v.pelletier@xxxxxxxxxxxx

From:        Mathieu Peyréga <mathieu.peyrega@xxxxxxxxx>
To:        htcondor-users <htcondor-users@xxxxxxxxxxx>
Date:        02/04/2016 09:45 AM
Subject:        [HTCondor-users] Requirement about network interface speed
Sent by:        "HTCondor-users" <htcondor-users-bounces@xxxxxxxxxxx>

---

Hello,

is it possible to make requierements about the speed of the network
interface card (10MBps / 100MBps / 1Gbps / 10Gbps / ...)

Regards,

Mathieu

-- 
tel : +33 (0)6 87 30 83 59
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