As suggested by Clyde
You can use the parallel module to do such task (which was just published on the Stata Journal, https://journals.sagepub.com/doi/ful...36867X19874242) In general, parallelization is made for data, but you can skip passing data and in essence, run multiple stata sessions simultaneously each one doing something different, like different sets of simulations. To do such, you can make use of the parallel macros, here is an example: https://github.com/gvegayon/parallel...nstance-macros
Here is another example from the manual: https://rawgit.com/gvegayon/parallel.../parallel.html
HIH
Originally posted by Clyde Schechter
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Code:
clear all
set more off
set trace off
parallel setclusters 4
cap drop
// Generating a variable called code that goes from 1/4
sysuse auto
set seed 112321
gen code = floor(runiform()*4) + 1
tab code
/*
code | Freq. Percent Cum.
------------+-----------------------------------
1 | 20 27.03 27.03
2 | 11 14.86 41.89
3 | 21 28.38 70.27
4 | 22 29.73 100.00
------------+-----------------------------------
Total | 74 100.00
*/
// Storing
save mytempdata, replace
clear
// Program that stores a dataset for
program myprogram
use if code == $pll_instance using mytempdata.dta, clear
collapse (mean) price rep78 (max) code
save dataset_$pll_instance.dta, replace
end
// Processing the data and taking a look at the datasets
parallel, prog(myprogram) nodata: myprogram price
ls dataset_*.dta
/*
-rw-rw-r-- 1 george george 907 Sep 21 09:28 dataset_1.dta
-rw-rw-r-- 1 george george 907 Sep 21 09:28 dataset_2.dta
-rw-rw-r-- 1 george george 907 Sep 21 09:28 dataset_3.dta
-rw-rw-r-- 1 george george 907 Sep 21 09:28 dataset_4.dta
*/
// Now appending (using parallel append)
parallel append, do(di) e("dataset_%g.dta, 1/4")
list
/*
+------------------------------------------+
| price rep78 code dta_source |
|------------------------------------------|
1. | 6,292.5 3.3 1 dataset_1.dta |
2. | 4,489 3.5 2 dataset_2.dta |
3. | 6,532.1 3.35 3 dataset_3.dta |
4. | 6,537.5 3.52632 4 dataset_4.dta |
+------------------------------------------+
*/
// Removing files using shell
!rm dataset_*.dta mytempdata.dta
Here is another example from the manual: https://rawgit.com/gvegayon/parallel.../parallel.html
Code:
program def myprog
gen x = $pll_instance
gen y = $PLL_CHILDREN
// For the first child process
if ($pll_instance == 1) gen z = exp(2)
// For the second child process
else if ($pll_instance == 2) {
summ price
gen z = r(mean)
}
// For the third and fourth child processes
else gen z = 0
end
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