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Re: non-persistant storage?
On Thu 2019-12-12 (17:06), L A Walsh wrote:
> On 2019/12/12 13:40, Eliot Moss wrote:
>
> > Ah! I think what you want is a tmpfs or ramfs.
> > Not sure if cygwin supports that ...
> >
> ----
> Easiest thing might be to use /dev/shm. I used it during
> development to store intermediate data that was later to be
> transfered via a fifo...
>
> Basically check for existence of "/dev/shm" (exists on my cygwin).
> if "tmp" didn't already exist, create it w/options similar to
> /tmp (only owner can delete/edit):
>
> mkdir -m 1777 /tmp/shm/tmp
>
>
> **Warning, "writes" to /dev/shm/tmp (or /dev/mem) can fill up
> your system's memory, so its only good for "small files"
> (small being well under your system's free memory amount).
This is true for Linux, but not for cygwin, where /dev/shm is ntfs on disk:
~: uname -a
CYGWIN_NT-10.0 VD-TIK-12 3.0.7(0.338/5/3) 2019-04-30 18:08 x86_64 Cygwin
~: df -TH /dev/shm
Filesystem Type Size Used Avail Use% Mounted on
C:/cygwin64 ntfs 34G 25G 8.9G 74% /
Its content is still there after a reboot and I can see it with the windows
explorer:
https://fex.belwue.de/fop/dyQzlG1x/X-20191213103905.png
--
Ullrich Horlacher Server und Virtualisierung
Rechenzentrum TIK
Universitaet Stuttgart E-Mail: horlacher@tik.uni-stuttgart.de
Allmandring 30a Tel: ++49-711-68565868
70569 Stuttgart (Germany) WWW: http://www.tik.uni-stuttgart.de/
REF:<5DF2E42A.7020200@tlinx.org>
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