ONCplus B.11.31.15 Release Notes (5992-5685, September 2012)

Features Introduced in ONCplus B.11.31.09.01
ONCplus B.11.31.09.01 is a defect fix release and does not include any new features. All features
introduced in previous ONCplus versions are supported in ONCplus B.11.31.09.01.
For information on the defects fixed, see “Enhancements and Fixes in ONCplus to date” (page 6).
Features Introduced in ONCplus B.11.31.09
ONCplus B.11.31.09 includes both defect fixes and new features. All features introduced in
previous ONCplus versions are supported in ONCplus B.11.31.09. The following feature was
introduced in ONCplus B.11.31.09:
New NFS Feature in ONCplus B.11.31.09
NFS introduces the following feature:
Parallel mount feature for performance improvement.
Prior to ONCplus B.11.31.09, when the system booted up, NFS mounted all the file systems listed
in the /etc/fstab file serially resulting in considerable boot time. To reduce this time, the parallel
mount feature is introduced in ONCplus B.11.31.09. This feature allows NFS to mount multiple
file systems parallelly thereby reducing the boot time.
The parallel mount feature has a dependency on the file system changes. The file system changes
are being delivered through a EP/NCF release. Following are the EP/NCF patch details:
1. Enhancement Patch: PHCO_40590
Release Date: March 2010
2. NCF Bundle: MountallEnh
Release Date: April 2010
These filesystem patches must be installed for NFS to use the parallel mount feature.
For more information about this feature, see the patch documentation for patch PHCO_40590 and
the web page for the NCF Bundle.
Features Introduced in ONCplus B.11.31.08
ONCplus B.11.31.08 includes both defect fixes and new features. All features introduced in
previous ONCplus versions are supported in ONCplus B.11.31.08. The following features were
introduced in ONCplus B.11.31.08:
New NFS Features in ONCplus B.11.31.08
NFS introduces the following features:
• The NFS mount structure nfs_args is made public.
The NFS structure nfs_args is made public and available for user application development
under /usr/include/nfs/mount.h header file. The user applications can make use of
this structure to mount NFS shares using mount()system call. For more information on the
usage of the structure, see the mount_nfs(1m) manpage.
• Asynchronous NFS Direct I/O performance improvement.
NFS Direct I/O: NFS Direct I/O is I/O to the NFS mounted files which avoids the file system
buffer cache of the operating system. It saves memory and improves performance of the
database applications that cache their own data independently. It can be enabled for an NFS
mount point, using the forcedirectio NFS mount option.
This use of forcedirectio option results in synchronous NFS I/O requests to the NFS
server. The synchronous I/O operation resulted in a low network utilization on fast networks
(10 GB Ethernet). Due to this drawback, a new Asynchronous NFS Direct I/O feature is
introduced. This option allows the NFS client to send multiple I/O requests to the server without
24 Features Introduced in previous versions of ONCplus