[gnuastro-devel] [task #15198] Specificifying directory for memory-mapped files

[Mohammad Akhlaghi]

URL:
  <https://savannah.gnu.org/task/?15198>

                 Summary: Specificifying directory for memory-mapped files
                 Project: GNU Astronomy Utilities
            Submitted by: makhlaghi
            Submitted on: Thu 28 Feb 2019 03:11:38 PM UTC
         Should Start On: Thu 28 Feb 2019 12:00:00 AM UTC
   Should be Finished on: Thu 28 Feb 2019 12:00:00 AM UTC
                Category: All Gnuastro
                Priority: 5 - Normal
              Item Group: Enhancement
                  Status: Postponed
                 Privacy: Public
        Percent Complete: 0%
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
                  Effort: 0.00

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Details:

Currently Gnuastro stores memory-mapped files in the `.gnuastro' directory.
Since this directory can also host (important) configuration files, it is best
that the memory-mapped files are stored separately.

But unlike the fixed `.gnuastro' directory, since memory-mapped files are
usually large (and are temporary), the user might have a good scratch place
for them on their system. So the user must be able to specify the directory
where the memory-mapped file will be kept.

We can add a general option like `--mmapdir' to let the user specify this
directory and add an argument to the dataset allocation function in Gnuastro's
library (which will decide if the array should be allocated in RAM or on
HDD/SSD.




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