ZFS Storage is collecting just a limitted set of storage metrics by default.
XorMon NG needs to create additional datasets necessary to provide more detailed performance overview.
Datasets will be groupped into several Worksheets on the storage named STOR2RRD_*

Please, do not delete these worksheets and datasets as they are necessary for XorMon NG functionality.

STOR2RRD_arc - cache statistics

arc.sizea	ARC cache in MB
arc.size[component]	ARC in MB - ARC data, ARC headers, ARC other
arc.hitratio	ARC Hit ratio in %
arc.accesses[hit/miss]	ARC access/sec
arc.l2_size	L2ARC cache in MB
arc.l2_accesses[hit/miss]	L2ARC access/sec

STOR2RRD_node - CPU, devices, interface

cpu.utilization	CPU % utilization
cpu.utilization[cpu]	CPU % utilization (by CPU)
nic.kilobytes	Throughput in kB/s (total)
nic.kilobytes[device]	Throughput in kB/s (by port)
nic.kilobytes[direction]	Throughput in kB/s (by direction)

STOR2RRD_iscsi - iSCSI protocol

iscsi.ops	iSCSI IOPS (total)
iscsi.ops[op]	iSCSI IOPS (read/write)
iscsi.ops[lun]	iSCSI IOPS (by LUN)
iscsi.ops[initiator]	iSCSI IOPS (by initiator)
iscsi.bytes	iSCSI Throughput in B/s (total)
iscsi.bytes[lun]	iSCSI Throughput in B/s (ny LUN)
iscsi.bytes[initiator]	iSCSI Throughput in B/s (by initiator)
iscsi.avglatency	iSCSI Average latency
iscsi.avglatency[op]	iSCSI Average latency (read/write)
iscsi.avglatency[pool=<pool>][op]	iSCSI Average latency for each pool (read/write)

STOR2RRD_fc - FC protocol

fc.ops	FC IOPS (total)
fc.ops[op]	FC IOPS (read/write)
fc.ops[lun]	FC IOPS (by LUN)
fc.ops[initiator]	FC IOPS (by initiator)
fc.bytes	FC Throughput in B/s (total)
fc.bytes[lun]	FC Throughput in B/s (by LUN)
fc.bytes[initiator]	FC Throughput in B/s (by initiator)
fc.avglatency	FC Average latency
fc.avglatency[op]	FC Average latency (read/write)

STOR2RRD_nfs - NFS protocol

nfs3.bytes	NFS3 Throughput in B/s (total)
nfs3.bytes[op]	NFS3 Throughput in B/s (read/write)
nfs3.bytes[share]	NFS3 Throughput in B/s (by share)
nfs4-1.bytes	NFS4 Throughput in B/s (total)
nfs4-1.bytes[op]	NFS4 Throughput in B/s (read/write)
nfs4-1.bytes[share]	NFS4 Throughput in B/s (by share)

STOR2RRD_smb - SMB protocol

smb2.bytes	SMB2 Throughput in B/s (total)
smb2.bytes[op]	SMB2 Throughput in B/s (read/write)
smb2.bytes[share]	SMB2 Throughput in B/s (by share)
smb3.bytes	SMB3 Throughput in B/s (total)
smb3.bytes[op]	SMB3 Throughput in B/s (read/write)
smb3.bytes[share]	SMB3 Throughput in B/s (by share)

STOR2RRD_disk - backend disk IO

io.ops	Disk IOPS (total)
io.ops[op]	Disk IOPS (read/write)
io.ops[disk]	Disk IOPS (by disk)
io.bytes	Disk throughput in B/s (total)
io.bytes[op]	Disk throughput in B/s (read/write)
io.bytes[disk]	Disk throughput in B/s (by disk)

NOTE:
Creating additional datasets will put a higer load on ZFS Storage CPUs.
Check your ZFS Storage CPU utilization before enabling the monitoring.