Creating and Running Parallels Cloud Storage iSCSI Targets

Notes:

1. Each iSCSI target must be assigned at least one unique IP address from frontnet's static pool.

2. The name of each iSCSI target must be unique in the Parallels Cloud Storage cluster.

3. Parallels Cloud Storage iSCSI targets support persistent reservations to allow iSCSI initiators obtain exclusive access to the specified target's LUNs.

To create and start a target test1 with the size of 100 GB, the LUN of 1, and the IP address of 192.168.10.100, execute the following commands:

# pstorage-iscsi create -n test1 -a 192.168.10.100

IQN: iqn.2014-04.com.pstorage:test1

# pstorage-iscsi lun-add -t iqn.2014-04.com.pstorage:test1 -l 1 -s 100G

# pstorage-iscsi start -t iqn.2014-04.com.pstorage:test1

Notes:

1. If you need to change target's IP address, stop the target as described in Stopping Parallels Cloud Storage iSCSI Targets , then run the command pstorage-iscsi set -t <target_name> -a <new_IP_address> .

2. If you need to increase the size of a LUN, stop the target as described in Stopping Parallels Cloud Storage iSCSI Targets , then run the command pstorage-iscsi lun-grow -t <target_name> -l <lun_ID> -s <new_size> .

To check that the target is up, run the pstorage-iscsi list command with the target's name as the option. For example:

[root@dhcp-10-30-24-73 ~]# pstorage-iscsi list -t iqn.2014-04.com.pstorage:test1

Target iqn.2014-04.com.pstorage:test1:

Portals: 192.168.10.100

Status: running

Registered: yes

Host: fefacc38a2f140ca

LUN: 1, Size: 102400M, Used: 1M, Online: Yes

For information about the command output, see Listing Parallels Cloud Storage iSCSI Targets .

iSCSI initiators can now access the target iqn.2014-04.com.pstorage:test1 via the portal 192.168.10.100.

Performance Tips

• Spread iSCSI targets evenly across Hardware Nodes in the cluster. For example, 10 Hardware Nodes with 1 iSCSI target per each will perform better than a single Hardware Node with 10 iSCSI targets on it.
• More LUNs per fewer iSCSI targets will perform better than fewer LUNs per more iSCSI targets.