topic Re: swapfile in Operating System - HP-UX

swapfile

navin — Wed, 07 May 2008 19:37:14 GMT

Hello ALl,
I have log of space in my root file system, can i create a swapfile in there using mkfile and use it as additional swap space
thanks - if so can you please tell me the syntax

Re: swapfile

Steven E. Protter — Wed, 07 May 2008 19:41:15 GMT

Shalom,

How to do it:

http://docs.hp.com/en/B2355-90950/ch06s03.html

http://docs.hp.com/en/7408/HPUXSANBootWP_final_v2_update.pdf

SEP

Re: swapfile

Venkatesh BL — Thu, 08 May 2008 01:34:25 GMT

Yes, you could do it. But, note that file system swap would any day be inefficient and slow than device swap.

Re: swapfile

Yogeeraj_1 — Thu, 08 May 2008 04:00:39 GMT

hi Navin,

Post the output of the following commands:

swapinfo -tam
bdf /
glance -m
(the memory details)

e.g.
SRX2:>swapinfo -tam
Mb Mb Mb PCT START/ Mb
TYPE AVAIL USED FREE USED LIMIT RESERVE PRI NAME
dev 512 0 512 0% 0 - 1 /dev/vg00/lvol2
dev 9728 0 9728 0% 0 - 0 /dev/vg01/swap01
reserve - 448 -448
memory 6310 927 5383 15%
total 16550 1375 15175 8% - 0 -
You have mail in /var/mail/root
SRV2:>bdf /
Filesystem kbytes used avail %used Mounted on
/dev/vg00/lvol3 204800 88440 115504 43% /
SRV2:>

Normally, we dont create anything on the root file system.

Can you check if you have unused space on other Volume groups or disks?

revert!

kind regards
yogeeraj

Re: swapfile

Sajjad Sahir — Thu, 08 May 2008 09:26:57 GMT

Dear Navin

if u want to create additional swap create
one more device swap ok not file system ok
eg:
lvcreate -L 100 /dev/vg01/lvol5
swapon /dev/vg01/lvol5
if u want to this next boot time onwards
make an entry in /etc/fstab file

thanks and regards

Sajjad Sahir

Re: swapfile

Rasheed Tamton — Sat, 10 May 2008 12:08:59 GMT

Hi Navin,

There is no mkfile command in HP-UX. It is avble in Solaris.

It is not advisable to create on root file system or simply, I think, you cannot create one on a mounted filesystem.

If you have an existing file system which can be unmounted then you can do something like this or create a new one.

umount /mountpoint
newfs -F vxfs -R90 /dev/vg01/rlvol9
(be sure you use the correct file sytem - it will reserve 90MB for swap)

You can also use -s90M (90MB size)

mount -F vxfs /dev/vg00/lvol9 /mountpoint
swapon /mountpoint
swapinfo -ft
[see the fs value]
swapinfo -tam
[localfs value]

Regards.