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.
