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Maximum NFS mount read/write sizes stuck at 32KB max for Solaris 10 or Solaris 11.1 (Doc ID 1433313.1)

Last updated on JULY 31, 2018

Applies to:

Solaris Operating System - Version 10 10/08 U6 to 11.1 [Release 10.0 to 11.0]
Information in this document applies to any platform.


Here is the problem :

One is trying to mount a filesystem For eg. /trail in this case from Linux NFS server hardy on solaris 10 system and the mount point is /testing.

The goal is to mount with rsize=1048576,wsize=1048576 using either mount option in vfstab file or through regular mount command.   The mount succeeds, but nfsstat -m shows the rsize/wsizes as  32KB (32768 bytes).

For example:

Entry in /etc/vfstab:

  hardy:/trail   -       /testing nfs   -       yes      bg,hard,intr,vers=3,rsize=1048576,wsize=1048576,proto=tcp

Output of €œnfsstat -m€“€:

/testing from hardy:/trail
Flags:         vers=3,proto=tcp,sec=sys,hard,intr,link,symlink,acl,rsize=32768,wsize=32768,retrans=5,timeo=600
Attr cache:    acregmin=3,acregmax=60,acdirmin=30,acdirmax=60

Output of €œmount€:

/testing on hardy:/trail remote/read/write/setuid/devices/rstchown/bg/hard/intr/vers=4/rsize=1048576/wsize=1048576/proto=tcp/xattr/dev=5cc0011 on Wed Feb 29 21:16:08 2012

The above output indicates it  the mount parameters of  rsize/wsize of 1MB were used, but nfsstat -m reports 32KB (see above).


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