Fujitsu eternus af Manuale di configurazione - Pagina 18
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Chapter 7
Installing Drivers and Setting Up the Server
7.1
Installing the Driver
Install the necessary drivers and patches following the Fibre Channel card installation guide.
7.2
Setting Up the Server
The server control environment now needs to be set up.
Set the command queue depth and the maximum number of volume groups for the server environment.
7.2.1
Setting Up the Command Queue Depth
Set the number of commands allowed to be queued (command queue depth) on each LUN in the ETERNUS
AF/DX storage systems from the Fibre Channel card. This setting optimizes the connection between the ETER-
NUS AF/DX storage systems and the server.
Model
ETERNUS AF/DX
*1: Recommended value = (maximum number of simultaneous command processes per CA port) ¸ (num-
ber of Fibre Channel ports connected to a single CA port) ¸ (number of LUNs)
(Round the result down to the nearest whole number)
•
The maximum number of simultaneous command processes per CA port is as follows:
The value is used by multiple servers that share the CA port. The commands are processed until the
limit is reached.
Model
ETERNUS AF S3 series, ETERNUS DX S5 series, ETERNUS
DX8900 S4
Models other than the above
Use the value of "8" if the actual result is lower. Use the maximum value if the actual result exceeds
•
the maximum value of the OS or the driver.
To achieve maximum system performance, this value can be changed according to the server load
•
and the peak operating times.
FUJITSU Storage ETERNUS AF, ETERNUS DX Configuration Guide -Server Connection- (Fibre Channel) for HP-UX
Setting value
Command queue depth
Arbitrary (*1)
Maximum number of simultaneous command processes
2048
1024
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