topic Re: RAM Disk in Operating System - HP-UX

RAM Disk

Amit Parui — Fri, 07 Sep 2007 00:50:32 GMT

Hi Gurus,

Can somebody tell me what is a RAM Disk and what is the use of that?

Expect answers in detail..pls
Regards
AP

Re: RAM Disk

Torsten. — Fri, 07 Sep 2007 00:56:58 GMT

About the main idea of a ram disk:

http://en.wikipedia.org/wiki/Ram_disk

You create a special area in memory and handle it like a physical disk.
Not supported for hp-ux.

Re: RAM Disk

AwadheshPandey — Fri, 07 Sep 2007 00:59:55 GMT

http://www.unix.com/unix-for-dummies-questions-and-answers/9360-unix-ramdisk.html

Re: RAM Disk

Wim Rombauts — Fri, 07 Sep 2007 03:21:34 GMT

HP-UX has MemFS as free add-on product since HP-UX 11i v2.

This type of filesystem is a good choice for when your system (or rather your software) writes many temporary files, that don't need to survive a reboot.

MemFS (or any other memory or RAM filesystem) is lost when the system goes down, so it can not be used to store anything that may still be needed after a reboot.

Since writing to a disk is still slow compared to the speed of a CPU, having a filesystem in memory to write temporary files to, can significantly speed up your system.

For more information, see http://docs.hp.com/en/11885/MemFSv2forHP-UX11iv2.pdf

Re: RAM Disk

Amit Parui — Sat, 08 Sep 2007 16:16:15 GMT

Thanks everyone for taking out your valuable time.