Re: [O] Emacs/ESS/org freezes/hangs on big data/ RAM(~256GB) processes when run in org/babel

[Andreas Leha]

Hi Rainer,

Rainer M Krug <address@hidden> writes:
> "Charles C. Berry" <address@hidden> writes:
>
>> On Wed, 17 Jun 2015, William Denton wrote:
>>
>>> On 17 June 2015, Xebar Saram wrote:
>>>
>>>> I do alot of modeling work that involves using huge datasets and run
>>>> process intensive R processes (such as complex mixed models, Gamms etc). in
>>>> R studio all works well yet when i use the orgmode eval on R code blocks it
>>>> works well for small simple process but 90% of the time when dealing with
>>>> complex models and bug data (up to 256GB) it will just freeze emacs/ess.
>>>> sometimes i can C-c or C-g it and other times i need to physically kill
>>>> emacs.
>>>
>>> I've been having the same problem for a while, but wasn't able to
>>> isolate it any more than large data sets, lack of memory, and heavy
>>> CPU usage. Sometimes everything hangs and I need to power cycle the
>>> computer. :(
>>>
>>
>> And you (both) have `ess-eval-visibly' set to nil, right?
>>
>> I do statistical genomics, which can be compute intensive. Sometimes
>> processes need to run for a while, and I get impatient having to wait.
>>
>> I wrote (and use) ox-ravel[1] to speed up my write-run-revise cycle in
>> org-mode.
>>
>> Basically, ravel will export Org mode to a format that knitr (and the
>> like) can run - turning src blocks into `code chunks'. That allows me
>> to set the cache=TRUE chunk option, etc. I run knitr on the exported
>> document to initialize objects for long running computations or to
>> produce a finished report.
>>
>> When I start a session, I run knitr in the R session, then all the
>> cached objects are loaded in and ready to use.
>>
>> If I write a src block I know will take a long time to export, I
>> export from org mode to update the knitr document and re-knit it to
>> refresh the cache.
>
> I have a similar workflow, only that I use a package like
> approach, i.e. I tangle function definitions in a folder ./R, data into
> ./data (which makes it possible to share org defined variables with R
> running outside org) and scripts, i.e. the things which do a analysis,
> import data, ... i.e. which might take long, into a folder ./scripts/. I
> then add the usual R package infrastructure files (DESCRIPTION,
> NAMESPACE, ...).
> Then I have one file tangled into ./scripts/init.R:
>
> #+begin_src R :tangle ./scripts/init.R  
> library(devtools)
> load_all()
> #+end_src
>
>
> and one for the analysis:
>
> #+begin_src R :tangle ./scripts/myAnalysis.R  
> ## Do some really time intensive and horribly complicated and important
> ## stuff here
> save(
>     fileNames,
>     bw,
>     cols,
>     labels,
>     fit,
>     dens,
>     gof,
>     gofPerProf,
>     file = "./cache/results.myAnalysis.rds"
> )
> #+end_src
>
>
> Now after tangling, I have my code easily available in a new R session:
>
> 1) start R in the directory in which the DESCRIPTION file is, 
> 2) run source("./scripts/init.R")
>
> and I have all my functions and data available.
>
> To run a analysis, I do
>
> 3) source("./scripts/myAnalysis.R")
>
> and the results are saved in a file fn
>
> To analyse the data further, I can then simply use
>
> #+begin_src R :tangle ./scripts/myAnalysis.R
> fitSing <- attach("./cache/results.myAnalysis.rds")
> #+end_src
>
>
> so they won't interfere with my environment in R.
>
> I can finally remove the attached environment by doing
>
> #+begin_src R :tangle ./scripts/myAnalysis.R  
> detach(
>     name = attr(fitSing, "name"),
>     character.only = TRUE
> )
> #+end_src
>
> Through these caching and compartmentalizing, I can easily do some
> things outside org and some inside, and easily combine all the data.
>
> Further advantage: I can actually create the package and send it to
> somebody for testing and review and it should run out of the box, as in
> the DESCRIPTION file all dependencies are defined.
>
> I am using this approach at the moment for a paper and which will also
> result in a paper. By executing all the scripts, one will be able to do
> import the raw data, do the analysis and create all graphs used in the
> paper.
>
> Hope this gives you another idea how one can handle long running
> analysis in R in org,
>
> Cheers,
>
> Rainer
>

That is a cool workflow.  I especially like the fact that you end up
with an R package.

So, I'll try my again.   Is there there any chance to see working
example of this?  I'd love to see that.

Thanks,
Andreas