This statistic shows iSCSI bytes/sec requested by initiators to the appliance.
iSCSI bytes/sec can be used as an indication of iSCSI load, in terms of throughput. For a deeper analysis of iSCSI activity, see Protocol: iSCSI Operations.
See Configuring Storage Area Network (SAN) in Oracle ZFS Storage Appliance Administration Guide, Release OS8.7.x for terminology definitions.
See Protocol: iSCSI Operations for numerous other breakdowns on iSCSI operations; also see Cache: ARC Accesses to learn how well an iSCSI read workload is returning from cache, and Disk: I/O Operations for the back-end disk I/O caused.