Settings
iSNS
iSNS (Internet Storage Name Service) provides the mechanism for centralized management. You can register all the iSCSI Targets with an iSNS server.
To register iSCSI Targets with an iSNS server:
- Click the button iSNS and tick the checkbox of Enable iSNS.
- Enter the IP address of the iSNS server. Click OK to apply the setting.
I/O Queue Depth
The default setting is 16, but you can modify the I/O queue depth of all targets as needed.
Low-Capacity Write
Low-Capacity Write allows the LUN features to function normally when a volume runs out of free space. When there is less than 1 GB of available space on a volume, the LUNs on the volume will become read-only, thereby preventing the filesystem from crashing. Under this condition, it is possible that users cannot mount the LUNs properly on the operation system nor access the data.
Note:
- Even with this feature enabled, please avoid continuing writing data into the iSCSI LUN.
Space Reclamation Mode
The following is three modes of space reclamation. By adjusting the speed, you can control the impact of space reclamation on LUN performance.
- Prioritize I/O Consistency: Prioritizing I/O consistency minimizes the impact on performance while the system reclaims used space of a legacy Advanced LUN. The speed is reduced if there is continuously incoming I/O. When receiving consecutive space reclamation commands, the reclamation process will be delayed until there is no other space reclamation commands.
- Balanced: The default reclamation mode. This mode keeps a balance between I/O speed and reclamation speed.
- Prioritize Reclamation: Prioritizing reclamation means that incoming I/O will have little influence on reclamation speed. The reclamation will be performed at its full speed without sacrificing I/O consistency.