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From Saliya Ekanayake <esal...@gmail.com>
Subject Re: Parameters to Control Intra-node Parallelism
Date Sat, 02 Jul 2016 16:28:47 GMT
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 <uce@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 <esaliya@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 <uce@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 <esaliya@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 <esaliya@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 <uce@apache.org>
wrote:
> >> >>>
> >> >>> On Thu, Jun 30, 2016 at 1:44 AM, Saliya Ekanayake <
> esaliya@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

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