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<div class="moz-cite-prefix">On 06/30/2014 04:35 PM, Jesse Pretorius
wrote:<br>
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cite="mid:CAGSrQvxbYhcSWF1csb5uGFcEggaYQEbUeAZ-r=FXTD8YJrf=3Q@mail.gmail.com"
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<div class="gmail_quote">On 30 June 2014 16:05, Eric Frizziero
<span dir="ltr"><<a moz-do-not-send="true"
href="mailto:eric.frizziero@pd.infn.it" target="_blank">eric.frizziero@pd.infn.it</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">In more
detail, some features of the FairshareScheduler are:<br>
a) It assigns dynamically the proper priority to every new
user requests;<br>
b) The priority of the queued requests will be
recalculated periodically using the fairshare algorithm.
This feature guarantees the usage of the cloud resources
is distributed among users and groups by considering the
portion of the cloud resources allocated to them (i.e.
share) and the resources already consumed;<br>
c) all user requests will be inserted in a (persistent)
priority queue and then processed asynchronously by the
dedicated process (filtering + weighting phase) when
compute resources are available;<br>
d) From the client point of view the queued requests
remain in “Scheduling” state till the compute resources
are available. No new states added: this prevents any
possible interaction issue with the Openstack clients;<br>
e) User requests are dequeued by a pool of WorkerThreads
(configurable), i.e. no sequential processing of the
requests;<br>
f) The failed requests at filtering + weighting phase may
be inserted again in the queue for n-times (configurable).<br>
<br>
We have integrated the FairShareScheduler in our Openstack
installation (release "HAVANA"). We're now working to
adapt the FairShareScheduler to the new release
"IceHouse".<br>
<br>
Does anyone have experiences in those issues found in our
cloud scenario?<br>
<br>
Could the FairShareScheduler be useful for the Openstack
community?<br>
In that case, we'll be happy to share our work.<br>
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<div>Sounds like an interesting option to have available.</div>
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Thank you very much for your feedback!<br>
<br>
Cheers,<br>
Eric.<br>
<br>
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