BTW why it's called posix isolation? It confused me too at the first time.
Yifan
On 07/11/2014 11:24 AM, Asim wrote:
> Is there any reason preventing you from using the cgroups cpu and
>memory isolators?
yes -- the reason was ignorance. I was not aware cgroups are not
enabled by default. I will enable cgroups now. Thanks for your response!
Regards,
Asim
On Fri, Jul 11, 2014 at 2:12 PM, Ian Downes <ian.dow...@gmail.com
<mailto:ian.dow...@gmail.com>> wrote:
The posix/cpu isolator doesn't actually do any isolation - it only is
useful to report cpu utilization. If you want to constrain the amount
of cpu available to each container you must use the cgroups/cpu
isolator.
Ian
On Fri, Jul 11, 2014 at 10:55 AM, Asim <linka...@gmail.com
<mailto:linka...@gmail.com>> wrote:
> Hi,
>
> I am using the default (posix) isolation. Also, I do not see the
systemd
> running (not sure how that affects isolation).
>
>
> Thanks,
> Asim
>
>
>
> On Fri, Jul 11, 2014 at 12:46 PM, Tim St Clair
<tstcl...@redhat.com <mailto:tstcl...@redhat.com>> wrote:
>>
>> It will also matter if you are using systemd.
>>
>> Cheers,
>> Tim
>>
>> ----- Original Message -----
>> > From: "Dick Davies" <d...@hellooperator.net
<mailto:d...@hellooperator.net>>
>> > To: user@mesos.apache.org <mailto:user@mesos.apache.org>
>> > Sent: Friday, July 11, 2014 11:43:36 AM
>> > Subject: Re: mesos isolation
>> >
>> > Are you using cgroups, or the default (posix) isolation?
>> >
>> >
>> >
>> > On 11 July 2014 17:06, Asim <linka...@gmail.com
<mailto:linka...@gmail.com>> wrote:
>> > > Hi,
>> > >
>> > > I am running a job on few machines in my Linux cluster.
Each machine
>> > > is an
>> > > Intel 8 core (with 32 threads). I see a total of 32 CPUs in
>> > > /etc/cpuinfo
>> > > and
>> > > within mesos web interface. When I launch a job using
mesos, I see
>> > > that all
>> > > CPUs are used equally and not just the number of CPUs I
specify for
>> > > that
>> > > task.
>> > >
>> > > Furthermore, I also see that the average per task running
time within
>> > > a
>> > > single machine, with 5 tasks/machine is 1/2 as much as that
with 10
>> > > tasks/machine. Within mesos, each task has 1 CPU assigned
and it is
>> > > completely CPU bound (no dataset, no file access). As per
mesos, the 5
>> > > tasks
>> > > job uses 5 CPUs while the 10 task job uses 10 CPUs (so
average task
>> > > run
>> > > times should be same unlike what I am seeing). Also, when I
monitor
>> > > CPU
>> > > utilization, I see that all CPUs are used equally. I am really
>> > > confused.
>> > > Is
>> > > this how mesos/container isolation is supposed to work?
>> > >
>> > > Thanks,
>> > > Asim
>> > >
>> >
>>
>> --
>> Cheers,
>> Timothy St. Clair
>> Red Hat Inc.
>
>
--
Gu Yifan
