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From: francios hoo on 26 Jul 2010 22:33
hello,

i know it is a bit stupid to ask such question but this problem has been bothered by me for a quite long time. i would be very appreciate who can help me to solve it.

is there any command or idea to transfer data among workers?

thanks in advance

francios
From: Walter Roberson on 26 Jul 2010 23:33
francios hoo wrote:

> i know it is a bit stupid to ask such question but this problem has been
> bothered by me for a quite long time. i would be very appreciate who can
> help me to solve it.
>
> is there any command or idea to transfer data among workers?

http://www.mathworks.com/access/helpdesk/help/toolbox/distcomp/brukbno-2.html

"The labs executing an spmd statement operate simultaneously and are
aware of each other. As with a parallel job, you are allowed to directly
control communications between the labs, transfer data between them, and
use codistributed arrays among them. For a list of toolbox functions
that facilitate these capabilities, see the Function Reference sections
Interlab Communication Within a Parallel Job and Distributed and
Codistributed Arrays."
From: francios hoo on 27 Jul 2010 01:44
Walter Roberson <roberson(a)hushmail.com> wrote in message <kss3o.41806$cO.21194(a)newsfe09.iad>...
> francios hoo wrote:
>
> > i know it is a bit stupid to ask such question but this problem has been
> > bothered by me for a quite long time. i would be very appreciate who can
> > help me to solve it.
> >
> > is there any command or idea to transfer data among workers?
>
> http://www.mathworks.com/access/helpdesk/help/toolbox/distcomp/brukbno-2.html
>
> "The labs executing an spmd statement operate simultaneously and are
> aware of each other. As with a parallel job, you are allowed to directly
> control communications between the labs, transfer data between them, and
> use codistributed arrays among them. For a list of toolbox functions
> that facilitate these capabilities, see the Function Reference sections
> Interlab Communication Within a Parallel Job and Distributed and
> Codistributed Arrays."

hello,

first of all thanks ya walter for the fast reply. however actually i am trying to do a programme that will execute 2 parts of looping.
part A: create a solution A each iteration whereby each iteration requires 30minutes.
part B: require to wait for the solution A and the simulation of part B only need around 15 seconds for all the iteration.
hence, in overall, my idea is running part B using solution A of iteration i while part A is running iteration (i+1)

however, if i combine the part A and part B, i would need one day to run it because (30x60s) x 15s = 2700s(7.5 hours) for every single iteration!!!
so my question is i don't really know how to load the data from the first core to be executed in core B.

thank you very much
francios
From: francios hoo on 27 Jul 2010 03:18
Walter Roberson <roberson(a)hushmail.com> wrote in message <kss3o.41806$cO.21194(a)newsfe09.iad>...
> francios hoo wrote:
>
> > i know it is a bit stupid to ask such question but this problem has been
> > bothered by me for a quite long time. i would be very appreciate who can
> > help me to solve it.
> >
> > is there any command or idea to transfer data among workers?
>
> http://www.mathworks.com/access/helpdesk/help/toolbox/distcomp/brukbno-2.html
>
> "The labs executing an spmd statement operate simultaneously and are
> aware of each other. As with a parallel job, you are allowed to directly
> control communications between the labs, transfer data between them, and
> use codistributed arrays among them. For a list of toolbox functions
> that facilitate these capabilities, see the Function Reference sections
> Interlab Communication Within a Parallel Job and Distributed and
> Codistributed Arrays."

hello,

first of all thanks ya walter for the fast reply. however actually i am trying to do a programme that will execute 2 parts of looping.
part A: create a solution A each iteration whereby each iteration requires 30minutes.
part B: require to wait for the solution A and the simulation of part B only need around 15 seconds for all the iteration.
hence, in overall, my idea is running part B using solution A of iteration i while part A is running iteration (i+1)

however, if i combine the part A and part B, i would need one day to run it because (30x60s) x 15s = 2700s(7.5 hours) for every single iteration!!!
so my question is i don't really know how to load the data from the first core to be executed in core B.

thank you very much
francios
From: Walter Roberson on 27 Jul 2010 10:16
francios hoo wrote:
> Walter Roberson <roberson(a)hushmail.com> wrote in message
> <kss3o.41806$cO.21194(a)newsfe09.iad>...
>> francios hoo wrote:
>>
>> > i know it is a bit stupid to ask such question but this problem has
>> been > bothered by me for a quite long time. i would be very
>> appreciate who can > help me to solve it.
>> > > is there any command or idea to transfer data among workers?
>>
>> http://www.mathworks.com/access/helpdesk/help/toolbox/distcomp/brukbno-2.html
>>
>>
>> "The labs executing an spmd statement operate simultaneously and are
>> aware of each other. As with a parallel job, you are allowed to
>> directly control communications between the labs, transfer data
>> between them, and use codistributed arrays among them. For a list of
>> toolbox functions that facilitate these capabilities, see the Function
>> Reference sections Interlab Communication Within a Parallel Job and
>> Distributed and Codistributed Arrays."
>
> hello,
>
> first of all thanks ya walter for the fast reply. however actually i am
> trying to do a programme that will execute 2 parts of looping.
> part A: create a solution A each iteration whereby each iteration
> requires 30minutes.
> part B: require to wait for the solution A and the simulation of part B
> only need around 15 seconds for all the iteration.
> hence, in overall, my idea is running part B using solution A of
> iteration i while part A is running iteration (i+1)
>
> however, if i combine the part A and part B, i would need one day to run
> it because (30x60s) x 15s = 2700s(7.5 hours) for every single iteration!!!
> so my question is i don't really know how to load the data from the
> first core to be executed in core B.

I still don't see why you say that it would take (30x60) x 15 instead of
(30x60) + 15

But in any case, if you had read the document I pointed to, you would
have seen that "Interlab Communication Within a Parallel Job" was a
link; when you click on that link you are shown the list of functions to
communicate between parallel clients, including labSend() and labReceive()
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