Installing UNH iSCSI software with the Myri-10G 10-Gigabit Ethernet Driver

Installing UNH iSCSI software with the
Myri-10G 10-Gigabit Ethernet Driver

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Myri-10G iSCSI UNH Initiator and Target Installation Instructions

Install a Linux distribution with a 2.6.14 kernel or newer on the Initiator / Target nodes.
Download, compile and load the Linux Myri10GE driver with an MTU of 9000
Enable TSO on the Myri10GE driver.

Download the UNH software UNH iSCSI Initiator and Target (iscsitarget-0.4.13.tar.gz) from SourceForge, and follow the installation instructions in the README to install this software on one of the two nodes. For performance tests the Target node should be configured in MEMORYIO mode to avoid disk bottlenecks. There is detailed information in the cmd directory. The configuration is summarized as follows:

iSCSI Target:

sudo insmod ./unh_scsi_target.ko
sudo insmod ./unh_iscsi_target.ko

sudo ./cmd/iscsi_manage target set InitialR2T=No
sudo ./cmd/iscsi_manage target set MaxRecvDataSegmentLength=16773120
sudo ./cmd/iscsi_config up server ip=192.168.0.7 port=5000

iSCSI Initiator:

 
sudo insmod ./unh_iscsi_initiator.ko
sudo ./cmd/iscsi_manage init set TargetName=iqn.2002-10.edu.unh.iol.iscsi.draft20-target:0 host=5
sudo ./cmd/iscsi_manage init set InitiatorName=iqn.1999-11.edu.unh.iol.iscsi.draft20-init host=5
sudo ./cmd/./iscsi_manage init set MaxRecvDataSegmentLength=16773120 host=5
sudo ./cmd/./iscsi_manage init set MaxBurstLength=131072 host=5
sudo ./cmd/./iscsi_manage init set InitialR2T=No host=5
sudo ./cmd/iscsi_manage init force sch=1 host=5
sudo ./cmd/iscsi_config up ip=192.168.0.7 port=5000 host=5

and verify startup and connection establishment in the output in dmesg.

Simple test:
```
sudo ./test/blastout /dev/sdh 10000
```
Disconnect from the iSCSI Target:
```
sudo ./cmd/iscsi_config down host=4
```

Status Info:

iSCSI Target:     cat /proc/scsi_target/iscsi_target/0
iSCSI Initiator:  cat /proc/scsi/iscsi_initiator/4

For iSCSI Digests, set Header and Data Digests:

sudo ./cmd/iscsi_manage target set CRC32C,None
sudo ./cmd/iscsi_manage target set CRC32C,None

Benchmarking:
Determine the name of the iSCSI disk on the Initiator from the output in dmesg. You may now treat this disk as a local disk. I.e., create a filesystem on it or run iometer or disktest against it.

Last updated: 30 January 2007