topic regarding fs_async kernel parameter in Operating System - HP-UX

regarding fs_async kernel parameter

ran_li — Tue, 04 Apr 2006 10:25:25 GMT

Hello all,

from previous post I understand this kernel parameter(fs_async) is for HFS not for vxfs/JFS/raw device. The questions are

1. if I m using HFS, is there a way to control the file system sync/async individually, e.g. /tmp can be set to async while /d1 can be set to sync?

2. how does vxfs/JFS control the sync/async behavior, again can it control the file system separately(like the question above)?

Thanks!

Re: regarding fs_async kernel parameter

Pete Randall — Tue, 04 Apr 2006 10:28:03 GMT

See the man pages for mount_hfs and mount_vxfs.

Pete

Re: regarding fs_async kernel parameter

Deoncia Grayson_1 — Tue, 04 Apr 2006 10:29:01 GMT

also you can puruse this document for more facts:

http://docs.hp.com/en/TKP-90202/re22.html

Re: regarding fs_async kernel parameter

ran_li — Tue, 04 Apr 2006 14:32:24 GMT

Thanks for the reply.

man mount_vxfs says

NOTE: The convosync option is available only
with the HP OnLineJFS product.

but I m not sure if onlineJFS and vxfs is the same thing with different name or ...

thanks for any comments!

Re: regarding fs_async kernel parameter

ran_li — Tue, 04 Apr 2006 14:45:05 GMT

And by the way, how can I tell the file system version for the existing vxfs? Thanks!

Re: regarding fs_async kernel parameter

ran_li — Tue, 04 Apr 2006 15:17:54 GMT

fstyp -v /dev/vg00/lvol3

Re: regarding fs_async kernel parameter

Bill Hassell — Tue, 04 Apr 2006 21:19:48 GMT

Online JFS is a special product that must be purchased. It adds several options to the mount command for VxFS as well as the ability to resize VxFS filesystems without unmounting them (most of the time). Use swlist to see if Advanced JFS (Online JFS) is present:

swlist -l bundle | grep -i jfs

JFS (Journaled File System) is another name for VxFS.