topic Re: mincache=direct,convosync=direct change in Operating System - HP-UX

mincache=direct,convosync=direct change

David Islas González_1 — Wed, 16 Jan 2008 14:49:35 GMT

Hello everybody, I need to change some parameters of almost all of my filesystems online, the parameter I need for them are:
mincache=direct,convosync=direct

I have OnlineJFS and I've already change this on /etc/fstab, but I can't umount the filesystems now as this is a production system.
Can this be done online?? which is the command I should use??

Thanks in advance.

Re: mincache=direct,convosync=direct change

James R. Ferguson — Wed, 16 Jan 2008 14:55:14 GMT

Hi David:

No, in HP-UX you must unmount the filesystem to affect the change.

Regards!

...JRF...

Re: mincache=direct,convosync=direct change

Duncan Edmonstone — Wed, 16 Jan 2008 15:12:00 GMT

James, are you sure you must umount? I just managed to do this...

# mount -p
/dev/vg00/lvol3 / vxfs ioerror=mwdisable,delaylog 0 1
/dev/vg00/lvol1 /stand hfs defaults 0 0
/dev/vg00/lvol8 /var vxfs ioerror=mwdisable,delaylog 0 0
/dev/vg00/lvol7 /usr vxfs ioerror=mwdisable,delaylog 0 0
/dev/vg00/lvol4 /tmp vxfs ioerror=mwdisable,delaylog 0 0
/dev/vg01/lvol1 /oracle vxfs ioerror=mwdisable,delaylog 0 0
/dev/vg00/lvol6 /opt vxfs ioerror=mwdisable,delaylog 0 0
/dev/vg00/lvol5 /home vxfs ioerror=mwdisable,delaylog 0 0
# cd /oracle
# mount -F vxfs -o mincache=direct,convosync=direct,remount /oracle
# mount -p
/dev/vg00/lvol3 / vxfs ioerror=mwdisable,delaylog 0 1
/dev/vg00/lvol1 /stand hfs defaults 0 0
/dev/vg00/lvol8 /var vxfs ioerror=mwdisable,delaylog 0 0
/dev/vg00/lvol7 /usr vxfs ioerror=mwdisable,delaylog 0 0
/dev/vg00/lvol4 /tmp vxfs ioerror=mwdisable,delaylog 0 0
/dev/vg01/lvol1 /oracle vxfs ioerror=mwdisable,mincache=direct,delaylog,convosync=direct 0 0
/dev/vg00/lvol6 /opt vxfs ioerror=mwdisable,delaylog 0 0
/dev/vg00/lvol5 /home vxfs ioerror=mwdisable,delaylog 0 0
# pwd
/oracle

# uname -sr
HP-UX B.11.11

# swlist B3929DA
# Initializing...
# Contacting target "c3000"...
#
# Target: c3000:/
#

# B3929DA 3.5-ga15-04 HP OnLineJFS 3.5
B3929DA.VRTSvxfs 3.5-ga15-01 VERITAS File System with CFS Support
B3929DA.FSDOC 3.5-ga15-01 VERITAS File System Documentation
B3929DA.OnlineJFS B.11.11.04 Online features of the VxFS File System
B3929DA.VRTSvlic 3.00.007e VERITAS License Utilities

HTH

Duncan

Re: mincache=direct,convosync=direct change

James R. Ferguson — Wed, 16 Jan 2008 15:22:52 GMT

Hi (again):

NO POINTS FOR ME IN THIS THREAD!

Duncan, you're absolutely correct --- and it's documented! I was dead wrong. I was not aware of the '-o remount':

http://docs.hp.com/en/B3921-60631/mount_vxfs.1M.html

Dunan, thanks for the correction!

Regards!

...JRF...

Re: mincache=direct,convosync=direct change

David Islas González_1 — Wed, 16 Jan 2008 15:43:54 GMT

Thanks a lot, I found this forum too:

http://forums12.itrc.hp.com/service/forums/questionanswer.do?admit=109447627+1200497914395+28353475&threadId=1185858

Thanks again, I really appreciate your quick answers.

Re: mincache=direct,convosync=direct change

TwoProc — Wed, 16 Jan 2008 20:40:02 GMT

Does that leave all of the files opened by Oracle still open and processes running fine? If so, that's pretty amazing!