Chelsio Communications Terminator 6, Инструкция по установке и эксплуатации, Страница: 174 / 432

Chapter X. iSCSI PDU Offload Target
Chelsio Unified Wire for Linux 174
When a target device is marked as read-
only (RO), it takes precedence over ACL’s write
permission (i.e., all of ACL write permission of an initiator is ignored).
4.7. Target Storage Device Configuration
An iSCSI Target can support one or more storage devices. The storage device can either be the
built-in RAM disk or actual backend storage.
Configuration of the storage is done through the Chelsio configuration file via the key-value pair
TargetDevice .
When option NULLRW is specified, on writes the data is dropped without being copied to the storage
device, and on reads the data is not actually read from the storage device but instead random
data is used. This option is useful for measuring network performance.
The details of the parameters for the key
TargetDevice
are found in the table of Chelsio Entity
Settings section earlier in this document.
RAM Disk Details
For the built-in RAM disk:
The minimum size of the RAM disk is 1 Megabyte (MB) and the maximum is limited by system
memory.
To use a RAM disk with a Windows Initiator, it is recommended to set the size >= 16MB.
To configure an ramdisk specify MEM as the device mode:
TargetDevice=<name>,MEM,size=xMB
Where:
<name>
Is a unique name given to the RAM disk. This name identifies this
particular ramdisk. If multiple RAM disks are configured for the same
target, the name must be unique for each RAM Disk.
x Is the size of the RAM disk in MB. It’s an integer between (1-max),
where max is limited by system memory. If not specified, the default
value is 16 MB.
target:
#<snip>
# 16 Megabytes RAM Disk named ramdisk1
TargetDevice=ramdisk1,MEM,size=16MB
#<snip>