[Ocfs2-users] bug resolve yet for export OCFS2 volume to NFS client ?

[Sérgio Surkamp]

Hi,

Our NFS setup is running stable since we have disabled READDIRPLUS on
our FreeBSD clients. The OCFS2 cluster servers are with about 200 days
of uptime now and last reboot was to upgrade the kernel version.

As a general recommendation, I suggest you to use the Oracle's
Unbreakable Linux kernel on top of CentOS 5.4 (or RedHat EL 5.4) and
OCFS2 1.6, also provided by Oracle, to avoid the known fragmentation bug
and to be able to enable the indexed directories feature for improved
performance.

If you are using only Linux NFS clients, you can try running with
READDIRPLUS enabled, but maybe you experience the same bug as FreeBSD
NFS client and disabling the READDIRPLUS call is the only known way to
avoid the problem.

To install the Unbreakable, fallow the instructions provided by Oracle
on its yum repository:

http://public-yum.oracle.com/

Regards,
Sérgio

Em Tue, 22 Mar 2011 14:52:11 +0800
Thomas Lau <thomaslau at esun.com> escreveu:

> I found this from ocfs1.4 document:
> g) NFS
> OCFS2 volumes can be exported as NFS volumes. This support is limited
> to NFS version 3, which translates to Linux kernel version 2.4 or
> later. Users must mount the NFS volumes on the clients using the
> nordirplus mount option. This disables the READDIRPLUS RPC call to
> workaround a bug in NFSD, detailed in the following link: 
> http://oss.oracle.com/pipermail/ocfs2-announce/2008-June/000025.html
> Users running NFS version 2 can export the volume after having
> disabled subtree checking (mount option no_subtree_check). Be warned,
> disabling the check has security implications (documented in the
> exports(5) man page) that users must evaluate on their own.
> 
> is it being fixed with centos 5.3 (2.6.18-164.11.1.el5)?
> 
> anything I need to aware for exporting OCFS2 volume via NFS?
> 



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