topic Re: HP-UX NFS mount options does not take effect in Operating System - HP-UX

HP-UX NFS mount options does not take effect

Orlando-Torres — Fri, 10 Nov 2017 21:10:30 GMT

Hello,

I have been testing mounting options for performance in a HP-UX 11.31 on BL870c i2 (10 Gbyte LAN)

NFS B11.31.19.1

Problem is that I try to mount manually for testing

# mount -F nfs -o rw,bg,vers=3,proto=tcp,noac,forcedirectio,hard,nointr,timeo=600,rsize=1048576,wsize=1048576,suid nfsserver01:/nfs/share /testnfs

but when I try to look for mounting options applied, did not take effect

nfsstat -m

Flags: vers=3,proto=tcp,sec=sys,hard,nointr,noac,link,symlink,acl,devs,rsize=32768,wsize=32768,retrans=5,timeo=600

Any help will be appreciated.

Regards,

Re: HP-UX NFS mount options does not take effect

Dave Olker — Fri, 10 Nov 2017 21:15:31 GMT

NFS mount options are *negotiated* between the client and server. Just because the client asks for an option does not mean it get it. Both sides need to support the option for it to take effect. In this case the client and server need to be configured to allow 1MB rsize/wsize options to succeed. The steps to enable large I/Os will vary depending on the vendor of the NFS client and server.

Re: HP-UX NFS mount options does not take effect

Orlando-Torres — Wed, 24 Oct 2018 20:49:42 GMT

Thanks Dave,

I've found out that these kernel setting were needed to negotiate against the Isilon

# kctune nfs4_bsize=1048576

==> Update the automatic 'backup' configuration first? yes
* The automatic 'backup' configuration has been updated.
* Future operations will update the backup without prompting.
* The requested changes have been applied to the currently
running configuration.
Tunable Value Expression Changes
nfs4_bsize (before) 32768 Default Immed
(now) 1048576 1048576