Hi Iwase,
I am not sure we can do that with multiprocessing module.
Might need to change Ryu event mechanism to do that (e.g. need to send
events to different process...)
Yi
2017-06-20 18:48 GMT-07:00 Iwase Yusuke <iwase.yusu...@gmail.com>:
> Hi Corry and Yi,
>
>
> On 2017年06月21日 03:14, Yi Tseng wrote:
> > Hi,
> >
> > I think we have some similar thread before:
> > https://sourceforge.net/p/ryu/mailman/ryu-devel/thread/
> CAM5MNiVPXW3xWeoHPMriXvSKkUnAHbgv6LqRZ%2BrE5rOZqDKaLQ%
> 40mail.gmail.com/#msg35801377
> >
> > Basically, I would suggest using multiple Ryu instance(process) to
> install flows to switch.
>
> Thanks Yi!
> Yes, I guess it is the best way to use multiple instances.
> The architecture might become complex though.
>
> Just an idea, I am wondering if we could use "multiprocessing" module...
>
> Thanks,
> Iwase
>
> >
> > 2017-06-19 3:44 GMT-07:00 corey ross <coreyvr...@gmail.com <mailto:
> coreyvr...@gmail.com>>:
> >
> > Yes I am referring to the first statement "multi-thread on Python is
> not effective enough"...
> >
> > Please let me give another example to make my question more clear
> > Lets say the routing algorithm wants to update the paths on switch
> S1, S2, S3. One way is to update all the switches at time 0 (in parallel),
> and the other way is to update s1 at time 0, s2 at time 1, and s3 at time 3
> (serial).
> >
> > Because of GIL in python a thread has to finish its task before
> moving to another thread; with this in mind I believe using threads will
> update the switches in serial; because the first thread has to finish
> installing the rules on s1, then it moves to the next thread to install the
> rules on s2 and so on....
> >
> > So my question is in Ryu what mechanism I can use to update s1, s2,
> s3 at time 0 (in one go)?
> > I hope my question is more clear now.
> >
> >
> > Thank you all for your time,
> > Corry
> >
> >
> >
> >
> >
> > On Mon, Jun 19, 2017 at 5:26 AM, Iwase Yusuke <
> iwase.yusu...@gmail.com <mailto:iwase.yusu...@gmail.com>> wrote:
> >
> > Hi,
> >
> >
> > On 2017年06月17日 20:47, corey ross wrote:
> > > Hey there,
> > > I was wondering if it is possible to install multiple flows in
> parallel, if yes how?
> > >
> > > for e.g if I have a topology of three switches (s1, s2, s3), I
> want to install flow-rules f1 on s1, f2 on s2 and f3 on s3. How can I
> install this three flow rules in parallel instead of doing so in serial
> fashion?
> > >
> > > I have searched around and It seems that using threads is not
> an effective way.
> >
> > Please let me make your question more clear.
> > What does "in parallel" and "in serial" exactly mean?
> >
> > You mean; you currently uses multi-thread (using "ryu.lib.hub"
> or "eventlet"),
> > but some post you read says "multi-thread on Python is not
> effective enough",
> > right?
> > If so, are you facing the performance limit, for example?
> >
> > Or, you want to get "Datapath" instance for s2 and s3, when you
> get event from
> > s1?
> >
> > Thanks,
> > Iwase
> >
> > >
> > >
> > >
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> >
> > --
> > Yi Tseng (a.k.a Takeshi)
> > Taiwan National Chiao Tung University
> > Department of Computer Science
> > W2CNLab
> >
> > https://takeshi.tw
> >
> >
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>
--
Yi Tseng (a.k.a Takeshi)
Taiwan National Chiao Tung University
Department of Computer Science
W2CNLab
https://takeshi.tw
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