> 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 <[email protected]> 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 <[email protected]> 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 <[email protected]> > wrote: > >> > >> It will also matter if you are using systemd. > >> > >> Cheers, > >> Tim > >> > >> ----- Original Message ----- > >> > From: "Dick Davies" <[email protected]> > >> > To: [email protected] > >> > 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 <[email protected]> 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. > > > > >
