topic Re: swap file system in Operating System - HP-UX

swap file system

Shivkumar — Sat, 13 Aug 2005 13:36:29 GMT

What is the role of swap file system with regard to virtual memory management on hpux 11i ?

Is it necessary that swap file system should be ufs type ?

Thanks,
Shiv

Re: swap file system

Devender Khatana — Sat, 13 Aug 2005 13:45:31 GMT

Hi,

The swap does not need to have a file system. Allthough you optionally can have a file system swap.

UFS is I think in SUN and in HP we have file system types of HFS, VXFS ( Also called JFS).

A raw partition or LVOL can work as swap partition.

HTH,
Devender

Re: swap file system

Pedro Cirne — Sat, 13 Aug 2005 14:08:17 GMT

Hi,

SWAP filesystem is the last option if you want performance.

There are several forum post concerning swap, check this one:

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=941041

Enjoy :)

Pedro

Re: swap file system

Mahesh Kumar Malik — Sun, 14 Aug 2005 02:25:05 GMT

Hi Shiv

Following link may be of help for the subject

http://docs.hp.com/en/B2355-90672/ch06s02.html

Regards
Mahesh

Re: swap file system

Cem Tugrul — Mon, 15 Aug 2005 03:03:47 GMT

Hi Shiv,

Another doc from my archive
Good luck,

Re: swap file system

Babu A — Mon, 15 Aug 2005 03:41:38 GMT

Hi Shiv,

Swap space is an area on disk that temporarily holds a process memory image. When physical memory demand is sufficiently low, process memory images are brought back into physical memory from the swap area on disk. Having sufficient swap space enables the system to keep some physical memory free at all times.

This type of memory management is often referred to as virtual memory and allows the total number of processes to exceed physical memory. Virtual memory enables the execution of a process within physical memory only as needed.

It is not mandatory to have a filesystem for the swap. A raw partion (either LVM or non LVM) can work as swap partion.

Regards,

Babu