Disk, group, pool, tier | Total IOPS | Total number of read and write operations per
second since the last sampling time. |
Disk, group, pool, tier | Read IOPS | Number of read operations per second since the
last sampling time. |
Disk, group, pool, tier | Write IOPS | Number of write operations per second since the
last sampling time. |
Disk, group, pool, tier | Data Throughput | Overall rate at which data was read and written
since the last sampling time. |
Disk, group, pool, tier | Read Throughput | Rate at which data was read since the last sampling
time. |
Disk, group, pool, tier | Write Throughput | Rate at which data was written since the last
sampling time. |
Disk, group, pool, tier | Total I/Os | Number of read and write operations since the last
sampling time. |
Disk, group, pool, tier | Number of Reads | Number of read operations since the last sampling
time. |
Disk, group, pool, tier | Number of Writes | Number of write operations since the last sampling
time. |
Disk, group, pool, tier | Data Transferred | Total amount of data read and written since the last
sampling time. |
Disk, group, pool, tier | Data Read | Amount of data read since the last sampling time. |
Disk, group, pool, tier | Data Written | Amount of data written since the last sampling
time. |
Disk, group | Average Response Time | Average response time for reads and writes since
the last sampling time. |
Disk, group | Average Read Response Time | Average response time for reads since the last
sampling time. |
Disk, group | Average Write Response Time | Average response time for writes since the last
sampling time. |
Disk, group | Average I/O Size | Average size of reads and writes since the last
sampling time. |
Disk, group | Average Read I/O Size | Average size of reads since the last sampling time. |
Disk, group | Average Write I/O Size | Average size of writes since the last sampling time. |
Disk, group | Number of Disk Errors | Number of disk errors since the last sampling time. |
Disk, group | Queue Depth | Average number of pending I/O operations being
serviced since the last sampling time. This value represents
periods of activity only and excludes periods of inactivity. |
Pool, tier | Number of Allocated Pages | Number of 4-MB pages allocated to volumes, based
on writes to those volumes. Creating a volume does not cause
any allocations. Pages are allocated as data is written. |
Tier | Number of Page Moves In | Number of pages moved into this tier from a different tier. |
Tier | Number of Page Moves Out | Number of pages moved out of this tier to other tiers. |
Tier | Number of Page Rebalances | Number of pages moved between disk groups in
this tier to automatically load balance. |
Tier | Number of Initial Allocations | Number of pages that are allocated as a result of
host writes. This number does not include pages allocated as
a result of background tiering page movement. (Tiering
moves pages from one tier to another, so one tier will see a
page deallocated, while another tier will show pages allocated;
these background moves are not considered “initial
allocations.”) |
Tier | Number of Unmaps | Number of 4-MB pages that are automatically
reclaimed and deallocated because they are empty (they
contain only zeroes for data). |
Tier | Number of RFC Copies | Number of 4-MB pages copied from spinning disks
to SSD read cache (read flash cache). |
Tier | Number of Zero-Pages Reclaimed | Number of empty (zero-filled) pages that were
reclaimed during this sample period. |