I have no idea about the price of cloud computing services, but if you
can find setups that give you access to SSDs you may be able to run
through thrasher tests much faster (cheaper?). :)
Mark
On 08/19/2015 05:05 PM, Loic Dachary wrote:
Hi,
To help put things in perspective (please forgive me if it's a fact already known
to everyone), > 95% of the teuthology jobs can run on virtual machines with 8GB
RAM, 40GB disk, 2 processors and no attached disks. The cost of running such
virtual machines in the cloud currently is 0.033 euros per hour. Running 40
teuthology jobs at all times would require an average of 80 such virtual machines
(most jobs use 2 machines, some 1 or 3), that is 0.033 * 80 vms * 24 hours * 31
days == ~2000 euros per month (also note that at least one cloud provider offers
50% discount if such virtual machines are reserved full time). That's 3 to 6 times
cheaper than AWS.
I'm not sure how much it costs to run these 40 teuthology jobs on a hand made
lab but I'd be surprised if it was cheaper, all included. Whatever hardware
already exists in the sepia lab can easily handle the remaining 5% of jobs that
require actual hardware for one reason or the other.
My 3.3cts ;-)
On 19/08/2015 21:46, Mark Nelson wrote:
Hi Guys,
About a month ago we were going through the process of trying to figure out how
to replace some of the hardware in the community laboratory that runs all of
the nightly Teuthology tests. Given a limited budget to replace the existing
nodes, we wanted to understand how the current QA suites actually spend time on
the hardware. To do this, we investigated the composition of suites, the
amount of time that is spent in each suite, and then a deeper dive into how the
most resource intensive jobs spend their time. We then wrote a new benchmark
for CBT to run ceph-test-rados in a rather naive reproduction of what the ceph
task in teuthology does and tested it against several different storage device
configurations to see how much benefit SSDs in the nodes may provide.
A couple of folks at the Hackathon were interested in the paper we wrote. I
thought I would share it with the community as well in case any folks ever
wondered what Teuthology actually spends it's time doing.
http://nhm.ceph.com/community/Ceph_Community_Lab_Performance_Investigation.pdf
Thanks,
Mark
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