Host Architectures
iSCSI Host Implementations
Software iSCSI
TCP in the Host
iSCSI in the host
Host
TCP in the host
High CPU utilization
Inexpensive—use standard
Ethernet NICs
Ethernet NIC
Software-based iSCSI uses standard Ethernet NICs:
iSCSI is processed in the host
TCP is processed in the host
Can result in high CPU utilization at full wire speeds
With faster multi-core and multi-processor systems this is becoming less of an
issue.