HP VMA SAN Gateway for VMA-series Memory Arrays Release Notes - August 2012 - Software OE version G5.1.0

# use the corresponding getuid_callout for your OS

# RHEL5/OL5 getuid_callout "/sbin/scsi_id -p 0x80 -g -u -s /block/%n"

# RHEL6/OL6 getuid_callout "/sbin/scsi_id --whitelisted --replace-

whitespace --page=0x80 --device=/dev/%n"

# SLES11 getuid_callout "/lib/udev/scsi_id --page=0x83 --whitelisted

--replace-whitespace --device=/dev/%n"

getuid_callout "/sbin/scsi_id --whitelisted --replace-whitespace -

-page=0x80 --device=/dev/%n"

# uncomment this for oracle RAC or other HA. Change to default_features for

older device-multipath.

# features "1 queue_if_no_path"

hardware_handler "0"

}

#multipaths {

# multipath {

# Get the wwid with "multipath -ll" and "multipath -v3" to refresh after altering

this file.

# wwid list-your-serial-#-and-alias-associations

here

# wwid 0x70fc037c02048024

# alias violin

# ...

The ‘rr_min_io’ value denotes the minimum number of I/O operations to send down the current

lunpath before selecting the next lunpath. A lower value than typically used with standard rotational

media storage array controllers has proven better to keep all lunpaths busy. This value could be

further tuned for your specific environment based on workload and number of lunpaths.

Queue-Depth Settings for RHEL 5.7 and OL 5.7

The HBA drivers used with Linux have default LUN level queue depth values of 30 or 32 depending

upon the HBA vendor. In many cases this default value will provide good results. However in cases

where a large number of LUNs are used with a large number of server FC initiator ports, the

resulting I/O load could cause Queue-Full conditions and I/O retries leading to non-optimal

performance.

For optimal I/O performance use, the following equation to determine the LUN queue depth

settings for the FC HBA driver:

LUN Queue Depth value =

(( <# gateway FC target ports> * 1024) / <# of server FC initiator ports> / <# of LUNs>)

If the resulting LUN Queue Depth value is greater than the HBA driver default (usually 30 or 32),

then use driver default setting.

Windows

The Microsoft Windows Server 2008 R2 SP1 and Windows Server 2008 R2 release has been validated

on the DL980 G7 server with the HP VMA SAN Gateway software OE version G5.1.0 and connected

VMA-series Memory Arrays using firmware version A5.1.3. It is recommended to apply all the latest

patches and MPIO QFEs before connecting your system to the VMA SAN Gateway appliance. The

following Hot Fixes are highly recommended to be installed for proper connectivity and operation:

• http://support.microsoft.com/kb/2460971