Many
of you will agree that sometimes it’s really good idea to have some
small amount of RAM mounted as a filesystem. It may be necessary when
running some bash or perl script that handles, say, thousands of small
files so it’s much more effective not to waste computer resources on
reading/writing data on hard disk but keep those files directly in
memory.
This idea is known as Virtual RAM Drive or ramdisk and can be setup in Ubuntu or almost any other Linux distribution using the following commands under root (to become root in Ubuntu use
"sudo -s“):
# mkdir /tmp/ramdisk; chmod 777 /tmp/ramdisk
# mount -t tmpfs -o size=256M tmpfs /tmp/ramdisk/
# mount -t tmpfs -o size=256M tmpfs /tmp/ramdisk/
where 256M is amount of RAM you wish to allocate for ramdisk. It’s clear that this value should be less than amount of free memory (use “
free -m“).
BTW, if you specify too many MBs for ramdisk Linux will try to allocate
it from RAM and then from swap so resulting performance would be very
poor.
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US: +1 (404)-900-9988.
UK: (20) 3734 1498.
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