I tried to run more than one task manager per node by duplicating the slave IPs. At startup it says for example,
[INFO] 1 instance(s) of taskmanager are already running on j-011. Starting taskmanager daemon on host j-011. but I only see 1 task manager process running. Is there anything else I need to do? On Sun, Jul 3, 2016 at 11:28 AM, Ufuk Celebi <u...@apache.org> wrote: > Yes, exactly. > > On Sat, Jul 2, 2016 at 6:28 PM, Saliya Ekanayake <esal...@gmail.com> > wrote: > > Thank you, yes, it can be done externally, if not supported within Flink. > > > > So the way to spawn multiple task managers would be to list the same > slave > > machines N times as necessary in the slaves file? > > > > On Sat, Jul 2, 2016 at 11:22 AM, Ufuk Celebi <u...@apache.org> wrote: > >> > >> No, not inside of Flink. That sounds like something like the OS or > >> resource manager should handle. > >> > >> On Sat, Jul 2, 2016 at 5:12 PM, Saliya Ekanayake <esal...@gmail.com> > >> wrote: > >> > That's great, so is there support to pin task managers to sockets as > >> > well? > >> > > >> > On Sat, Jul 2, 2016 at 11:08 AM, Ufuk Celebi <u...@apache.org> wrote: > >> >> > >> >> Regarding 2) if you don't manually configure something else, that > >> >> should happen always. > >> >> > >> >> Yes, you can run more than one task manager per node depending on the > >> >> process isolation you want. Within a task manager, there are multiple > >> >> threads for each slot. For example, if you have 2 task managers with > 2 > >> >> slots each and submit a job with parallelism 4, each task manager > will > >> >> execute 2 sub tasks in separate Threads. > >> >> > >> >> > >> >> On Sat, Jul 2, 2016 at 3:26 AM, Saliya Ekanayake <esal...@gmail.com> > >> >> wrote: > >> >> > Hi Ufuk, > >> >> > > >> >> > Looking at the document you sent it seems only 1 task manager per > >> >> > node > >> >> > exist > >> >> > and within that you have multiple slots. Is it possible to run more > >> >> > than > >> >> > 1 > >> >> > task manager per node? Also, within a task manager is the > parallelism > >> >> > done > >> >> > through threads or processes? > >> >> > > >> >> > Thank you, > >> >> > Saliya > >> >> > > >> >> > On Thu, Jun 30, 2016 at 5:27 PM, Saliya Ekanayake < > esal...@gmail.com> > >> >> > wrote: > >> >> >> > >> >> >> Thank you, I'll check these. > >> >> >> > >> >> >> In 2.) you said they are likely to exchange through memory. Is > there > >> >> >> a > >> >> >> case why they wouldn't? > >> >> >> > >> >> >> On Thu, Jun 30, 2016 at 5:03 AM, Ufuk Celebi <u...@apache.org> > wrote: > >> >> >>> > >> >> >>> On Thu, Jun 30, 2016 at 1:44 AM, Saliya Ekanayake > >> >> >>> <esal...@gmail.com> > >> >> >>> wrote: > >> >> >>> > 1. What parameters are available to control parallelism within > a > >> >> >>> > node? > >> >> >>> > >> >> >>> Task Manager processing slots: > >> >> >>> > >> >> >>> > >> >> >>> > >> >> >>> > https://ci.apache.org/projects/flink/flink-docs-release-1.0/setup/config.html#configuring-taskmanager-processing-slots > >> >> >>> > >> >> >>> > 2. Does Flink support shared memory-based messaging within a > node > >> >> >>> > (without > >> >> >>> > doing TCP calls)? > >> >> >>> > >> >> >>> Yes, local exchanges happen via memory and not TCP, for example > if > >> >> >>> you > >> >> >>> have a map-reduce, map subtask 1 and reduce subtask 1 are likely > to > >> >> >>> exchange data locally. > >> >> >>> > >> >> >>> > 3. Is there support for Infiniband interconnect? > >> >> >>> > >> >> >>> No, not that I'm aware of. > >> >> >>> > >> >> >>> – Ufuk > >> >> >> > >> >> >> > >> >> >> > >> >> >> > >> >> >> -- > >> >> >> Saliya Ekanayake > >> >> >> Ph.D. Candidate | Research Assistant > >> >> >> School of Informatics and Computing | Digital Science Center > >> >> >> Indiana University, Bloomington > >> >> >> > >> >> > > >> >> > > >> >> > > >> >> > -- > >> >> > Saliya Ekanayake > >> >> > Ph.D. Candidate | Research Assistant > >> >> > School of Informatics and Computing | Digital Science Center > >> >> > Indiana University, Bloomington > >> >> > > >> > > >> > > >> > > >> > > >> > -- > >> > Saliya Ekanayake > >> > Ph.D. Candidate | Research Assistant > >> > School of Informatics and Computing | Digital Science Center > >> > Indiana University, Bloomington > >> > > > > > > > > > > > -- > > Saliya Ekanayake > > Ph.D. Candidate | Research Assistant > > School of Informatics and Computing | Digital Science Center > > Indiana University, Bloomington > > > -- Saliya Ekanayake Ph.D. Candidate | Research Assistant School of Informatics and Computing | Digital Science Center Indiana University, Bloomington
