Linux Memory File System TMPFS

The memory file system that comes with the CentOS system. This tmpfs is the meaning of the temporary file system.

One

Use the command df-h to see if TMPFS is running.

Filesystem            Size  used Avail use% mountedon/dev/mapper/volgroup-LogVol01                       96G   20G   71G  %/tmpfs                 3. 8G  4. 0K  3. 8G   1%/dev/shm/dev/vda1             194M   27M  157M  %/boot 192.168. 3.75:/opt/NFS                       50G  3. 8G   43G   9%/opt/nfs

The line that appears TMPFS indicates that the system has been switched on. The default is to use the/DEV/SHM directory

The general default storage space is the general memory of the whole system. You can set the TMPFS memory size yourself

At this time can go to the/DEV/SHM directory and on the other disk to try the same operation of the IO speed (recommended large files, the effect is obvious), the speed looks like an order of magnitude ah.

Two

If you want to define your own directory and bind it to TMPFS, it's easy

Using the Mount command is OK. Time is urgent. Next, fill in the detailed commands

Linux Memory File System TMPFS