On Thu, Nov 9, 2017 at 2:27 AM, <zoltan.zv...@gmail.com> wrote: > We measured that we lose at least one order of magnitude in terms of latency, > which is our key KPI in this setup.
If you are moving from a model where your apps were guaranteed to be colocated into Kubernetes, you are going to have a rough trip. Kubernetes starts by assuming that everything speaks over the network. > Pods are not always on the same host, but we play with co-location a lot. > 1:1 mainly. Consider bundling them into the same Pod? Pods share IPC and are co-scheduled. In some sense, a pod is a replacement for a VM. Alternatively, you could consider the `hostIPC` field - it will put your pods in the machine's IPC space, wherein they can find each other. We don't have a general mechanism yet for sharing namespaces across pods. we may get there some day, but the complexity has to be justified pretty broadly. > Matthias, Tim, I will get back to you with a decent benchmark on our metals. > Thanks so far for your kind help! > > Zoltán > > On Wednesday, November 8, 2017 at 8:27:52 PM UTC+1, Tim Hockin wrote: >> Are you concerned about perf because you measured it? Or because you >> suspect it might become a thing later? >> >> Are you really sure that your pods will ALWAYS be on the same host? >> >> Are your pods 1:1 or 1:N relationships? >> >> Could these highly-connected pods just be one bigger pod? >> >> To be sure, there's some overhead in networking containers today, but >> you haven't really explained your problem. >> >> On Wed, Nov 8, 2017 at 10:08 AM, <zoltan.zv...@gmail.com> wrote: >> > Thanks Tim, >> > >> > Do you know of any technique(s) to speed up the network between pods >> > (probably co-located onto the same machine)? Shared memory communication >> > seems to be a good candidate within pods. >> > >> > On Wednesday, November 8, 2017 at 6:42:39 PM UTC+1, Tim Hockin wrote: >> >> Pods should make very few assumptions about other pods. Sharing IPC >> >> implies a high level of affinity, at which point I would question why >> >> they are two different pods in the first place. >> >> >> >> On Wed, Nov 8, 2017 at 9:22 AM, <zoltan.zv...@gmail.com> wrote: >> >> > Currently it is possible to share (shared memory) IPC namespace within >> >> > pods, but not possible to share between pods. >> >> > >> >> > Is this something that will be supported in the future? Or goes against >> >> > the very design of Kubernetes? >> >> > >> >> > What is the general opinion of the Community on this? >> >> > >> >> > Thanks, >> >> > Z >> >> > >> >> > -- >> >> > You received this message because you are subscribed to the Google >> >> > Groups "Kubernetes user discussion and Q&A" group. >> >> > To unsubscribe from this group and stop receiving emails from it, send >> >> > an email to kubernetes-users+unsubscr...@googlegroups.com. >> >> > To post to this group, send email to kubernetes-users@googlegroups.com. >> >> > Visit this group at https://groups.google.com/group/kubernetes-users. >> >> > For more options, visit https://groups.google.com/d/optout. >> > >> > -- >> > You received this message because you are subscribed to the Google Groups >> > "Kubernetes user discussion and Q&A" group. >> > To unsubscribe from this group and stop receiving emails from it, send an >> > email to kubernetes-users+unsubscr...@googlegroups.com. >> > To post to this group, send email to kubernetes-users@googlegroups.com. >> > Visit this group at https://groups.google.com/group/kubernetes-users. >> > For more options, visit https://groups.google.com/d/optout. > > -- > You received this message because you are subscribed to the Google Groups > "Kubernetes user discussion and Q&A" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to kubernetes-users+unsubscr...@googlegroups.com. > To post to this group, send email to kubernetes-users@googlegroups.com. > Visit this group at https://groups.google.com/group/kubernetes-users. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "Kubernetes user discussion and Q&A" group. To unsubscribe from this group and stop receiving emails from it, send an email to kubernetes-users+unsubscr...@googlegroups.com. To post to this group, send email to kubernetes-users@googlegroups.com. Visit this group at https://groups.google.com/group/kubernetes-users. For more options, visit https://groups.google.com/d/optout.
