3.7.0 HP StorageWorks HP Scalable NAS File Serving Software upgrade guide HP Scalable NAS for Linux (AG513-96005, October 2009)

Although this document refers to /opt/hpcfs, /var/opt/hpcfs and /etc/opt/

hpcfs, you can continue to use /opt/polyserve, /var/opt/polyserve and

/etc/opt/polyserve as the directory names.

Product changes affecting the upgrade

You should be aware of the following changes:

• HP Scalable NAS now uses the Pluggable Authentication Modules (PAM) mech-

anism for authentication. When HP Scalable NAS is installed, it determines

whether PAM is configured on the system. If PAM is installed, a PAM configuration

file will be created for the HP Scalable NAS pswebsrv authentication module,

and authentication will be done via the method specified in the PAM configuration.

If PAM is not installed on the system, authentication will be done with the local

shadow password files. Consequently, the cluster admin user, the mxpasswd file,

and the mxpasswd command are now obsolete.

• The minimum size for a membership partition is now 1GB. If your existing mem-

bership partitions are too small to accommodate the new mxds datastore, which

is included in the membership partitions, an alert will be generated after the up-

grade to 3.7.0. Chapter 7, page 81, describes how to replace the existing

membership partitions.

• The 3.7.0 release includes a performance enhancement for small files on PSFS

filesystems. Existing filesystems need to be upgraded after the 3.7.0 installation

to enable this feature. After the feature has been enabled, it cannot be later dis-

abled. The filesystem is upgraded with the psfsck command, which enables the

feature internally in the filesystem. Consequently, a brief cluster-wide outage of

the filesystem is required during the upgrade. Turning on this feature will not im-

prove the read time of pre-3.7.0 ﬁles, but should improve the read performance

of any new small ﬁles that are created on the ﬁlesystem. See Chapter 7, page

81 for information about enabling this feature.

• The Performance Dashboard has been replaced with a new web-based application

that provides performance data over a period of time (the last hour, day, week,

month, or year). You can view data for individual servers or the entire cluster.

Filesystem data is provided for individual PSFS filesystems and can be aggregated

for all PSFS filesystems. The dashboard is provided in a separate RPM.

If you install the Performance Dashboard RPM, alert messages referring to admin-

fs, the administrative filesystem, will appear on the Management Console when

HP Scalable NAS starts on the servers. This filesystem is required by the Perform-

ance Dashboard and the HP Scalable NAS replication feature. See “Create the

administrative filesystem” in the HP Scalable NAS File Serving Software adminis-

tration guide for information about setting up the filesystem.

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