Topics: Performance, Red Hat / Linux, Storage, System Admin

Creating a RAM disk on Linux

On Linux, you can use the tmpfs to create a RAM disk:

# mkdir -p /mnt/tmp
# mount -t tmpfs -o size=20m tmpfs /mnt/tmp
This will create a 20 Megabyte sized RAM file system, mounted on /mtn/tmp. If you leave out the "-o size" option, by default half of the memory will be allocated. However, the memory will not be used, as long as no data is written to the RAM file system.

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