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

membership partitions” in the HP Scalable NAS File Serving Software administration

guide for more information.

Upgrade filesystems for small files (optional)

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

filesystems. This feature is enabled by default in PSFS filesystems created on HP

Scalable NAS 3.7.0. PSFS filesystems created on earlier releases must be upgraded

to enable the small files performance enhancement. Turning on this feature will not

improve 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.

The filesystem is upgraded with the psfsck command, which enables the feature

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

is required during the upgrade.

To upgrade a PSFS filesystem for the small files performance enhancement feature,

take the following steps:

1. Stop all applications using the filesystem.

2. Unmount the filesystem on all nodes.

3. Run the following command:

# /opt/hpcfs/sbin/psfsck –e enable-smallfiles <device>

The device can be either a psd or psv device. Use this syntax to specify the

device:

• For a psd device partition, the device is specified as /dev/psd/psdXXXpYY,

where XXX is the drive number and YY is the partition number. For example,

/dev/psd/psd6p4 specifies partition 4 on disk psd6.

• For a non-partitioned psd device, the device is specified as /dev/psd/

psdXXX, where XXX is the drive number. For example, /dev/psd/psd5.

• For a psv device, the device is specified as /dev/psv/psvXXX, where XXX

is the volume number. For example, /dev/psv/psv1.

4. Mount the filesystem.

5. Restart the applications that use the filesystem.

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