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.
Is there any reason preventing you from using the cgroups cpu and memory isolators? Ian On Fri, Jul 11, 2014 at 10:55 AM, Asim <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> wrote: >> >> It will also matter if you are using systemd. >> >> Cheers, >> Tim >> >> ----- Original Message ----- >> > From: "Dick Davies" <d...@hellooperator.net> >> > To: 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> 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. > >
