On Mon, Aug 19, 2013 at 2:08 PM, Patrick Connolly
wrote:
> On Sat, 17-Aug-2013 at 05:09PM -0700, Jeff Newmiller wrote:
>
>
> |> In most threaded multitasking environments it is not safe to
> |> perform IO in multiple threads. In general you will have difficulty
> |> performing IO in parallel proce
> For tasks which don't involve I/O but fail with mclapply, how does one
> work out where the problem is? The handy browser() function which
> allows for interactive diagnosis won't work with parallel jobs.
>
> What other approaches can one use?
?dump.frames - interactive debugging after the fac
On 20/08/2013 03:13, Hopkins, Bill wrote:
I wrap functions to run via multicore with tryCatch() to gather stats on
failure rate and capture state.
I'm still interested in how/whether core fuctions were verified as being
threadsafe.
What does 'threads' have to do with this? Multicore forks
I wrap functions to run via multicore with tryCatch() to gather stats on
failure rate and capture state.
I'm still interested in how/whether core fuctions were verified as being
threadsafe.
Bill Hopkins
Written using a virtual Android keyboard...
-- Original message --
From: Jef
f Of Jeff Newmiller
> Sent: Monday, August 19, 2013 4:19 PM
> To: Patrick Connolly
> Cc: r-help@R-project.org; Hopkins,Bill
> Subject: Re: [R] Appropriateness of R functions for multicore
>
> I don't know... I suppose it depends how it fails. I recommend that you
> restr
I don't know... I suppose it depends how it fails. I recommend that you
restrict yourself to using only the data that was passed as parameters to your
parallel function. You may be able to tackle parts of the task and return only
those partial results to confirm how far through the code you can
On Sat, 17-Aug-2013 at 05:09PM -0700, Jeff Newmiller wrote:
|> In most threaded multitasking environments it is not safe to
|> perform IO in multiple threads. In general you will have difficulty
|> performing IO in parallel processing so it is best to let the
|> master hand out data to worker tas
In most threaded multitasking environments it is not safe to perform IO in
multiple threads. In general you will have difficulty performing IO in parallel
processing so it is best to let the master hand out data to worker tasks and
gather results from them for storage. Keep in mind that just bec
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