Performance Metrics for Block

**Table 1** Performance metrics for block
Item		Definition	Significance
Cluster	IOPS (IO/s)	Average number of I/O requests processed by a module per second.	Indicates the number of I/O requests received per second.
	Read IOPS (IO/s)	Average number of read requests processed by a module per second.	Indicates the number of read I/O requests received per second.
	Write IOPS (IO/s)	Average number of write requests processed by a module per second.	Indicates the number of write I/O requests received per second.
	Read Bandwidth (KB/s)	Average read request data volume processed by a module per second.	Indicates the data volume read per second.
	Write Bandwidth (KB/s)	Average write request data volume processed by a module per second.	Indicates the data volume written per second.
	Total Bandwidth (KB/s)	Average I/O data volume on a module per second.	Indicates the I/O data volume per second.
	Avg. Operation Latency (ms)	Average latency of read and write operations on a monitored object in a sampling period.	Indicates the time required to process I/Os.
	Avg. Write Operation Latency (ms)	Average latency of write operations on a monitored object in a sampling period.	Indicates the time required to process write I/Os.
	Avg. Read Operation Latency (ms)	Average latency of read operations on a monitored object in a sampling period.	Indicates the time required to process read I/Os.
	Avg. Operation Latency (us)	Average latency of read and write operations on a monitored object in a sampling period. NOTE: Compared with Avg. Operation Latency (ms), Avg. Operation Latency (us) is more accurate and the monitored performance data is more accurate and complete.	Indicates the time required to process I/Os.
	Avg. Write Operation Latency (us)	Average latency of write operations on a monitored object in a sampling period. NOTE: Compared with Avg. Write Operation Latency (ms), Avg. Write Operation Latency (us) is more accurate and the monitored performance data is more accurate and complete.	Indicates the time required to process write I/Os.
	Avg. Read Operation Latency (us)	Average latency of read operations on a monitored object in a sampling period. NOTE: Compared with Avg. Read Operation Latency (ms), Avg. Read Operation Latency (us) is more accurate and the monitored performance data is more accurate and complete.	Indicates the time required to process read I/Os.
	Avg. Read I/O Size (KB)	Average size of read I/Os of a cluster in a sampling period.	Indicates the average read I/O size.
	Avg. Write I/O Size (KB)	Average size of write I/Os of a cluster in a sampling period.	Indicates the average write I/O size.
	Unmap Command Bandwidth (MB/s)	Bandwidth (MB/s) of the Unmap command in a cluster in a sampling period.	Indicates the bandwidth (MB/s) of the Unmap command.
	Unmap Command IOPS (IO/s)	IOPS (IO/s) of the Unmap command in a cluster in a sampling period.	Indicates the IOPS (IO/s) of the Unmap command.
	Avg. Unmap Command I/O Size (KB)	Average I/O size (KB) of the Unmap command in a cluster in a sampling period.	Indicates the average I/O size (KB) of the Unmap command.
	Avg. Unmap Command I/O Response Time (us)	Average I/O response time (us) of the Unmap command in a cluster in a sampling period.	Avg. Unmap Command I/O Response Time (us)
	WRITE SAME Command Bandwidth (MB/s)	Bandwidth (MB/s) of the WRITE SAME command in a cluster in a sampling period.	Indicates the bandwidth (MB/s) of the WRITE SAME command.
	WRITE SAME Command IOPS (IO/s)	IOPS (IO/s) of the WRITE SAME command in a cluster in a sampling period.	Indicates the IOPS (IO/s) of the WRITE SAME command.
	Avg. WRITE SAME Command I/O Size (KB)	Average I/O size (KB) of the WRITE SAME command in a cluster in a sampling period.	Indicates the average I/O size (KB) of the WRITE SAME command.
	Avg. WRITE SAME Command I/O Response Time (us)	Average I/O response time (us) of the WRITE SAME command in a cluster in a sampling period.	Avg. WRITE SAME Command I/O Response Time (us)
	Full Copy Command Read Bandwidth (MB/s)	Read bandwidth (MB/s) of the Full Copy command in a cluster in a sampling period.	Indicates the read bandwidth (MB/s) of the Full Copy command.
	Full Copy Command Read IOPS (IO/s)	Read IOPS (IO/s) of the Full Copy command in a cluster in a sampling period.	Indicates the read IOPS (IO/s) of the Full Copy command.
	Avg. Full Copy Command Read I/O Size (KB)	Average read I/O size (KB) of the Full Copy command in a cluster in a sampling period.	Indicates the average read I/O size (KB) of the Full Copy command.
	Avg. Full Copy Command Read I/O Response Time (us)	Average read I/O response time (us) of the Full Copy command in a cluster in a sampling period.	Indicates the average read I/O response time (us) of the Full Copy command.
	Full Copy Command Write Bandwidth (MB/s)	Write bandwidth (MB/s) of the Full Copy command in a cluster in a sampling period.	Indicates the write bandwidth (MB/s) of the Full Copy command.
	Full Copy Command Write IOPS (IO/s)	Write IOPS (IO/s) of the Full Copy command in a cluster in a sampling period.	Indicates the write IOPS (IO/s) of the Full Copy command.
	Avg. Full Copy Command Write I/O Size (KB)	Average write I/O size (KB) of the Full Copy command in a cluster in a sampling period.	Indicates the average write I/O size (KB) of the Full Copy command.
	Avg. Full Copy Command Write I/O Response Time (us)	Average write I/O response time (us) of the Full Copy command in a cluster in a sampling period.	Indicates the average write I/O response time (us) of the Full Copy command.
Node	Avg. CPU Usage (%)	CPU usage in a statistical period. By default, one statistical period is ten seconds.	Indicates the service load on the CPU.
	Avg. Memory Usage (%)	Memory usage in a statistical period. By default, one statistical period is ten seconds.	Indicates the service load on the memory.
	Cache Watermark Statistics (%)	Percentage of the write cache capacity used by a storage node.	Indicates the write cache capacity usage of a storage node.
	Read IOPS (IO/s)	Average number of I/O requests per second.	Indicates the number of I/O requests received per second.
	Write IOPS (IO/s)	Average number of write requests per second.	Indicates the number of write I/O requests received per second.
	Total IOPS (IO/s)	Average number of I/O requests per second.	Indicates the number of I/O requests received per second.
	Read Bandwidth (KB/s)	Average data volume of data retrieval requests processed per second.	Indicates the volume of data retrieved per second.
	Write Bandwidth (KB/s)	Average data volume of write requests processed per second.	Indicates the data volume written per second.
	Total Bandwidth (KB/s)	Average I/O data volume per second.	Indicates the I/O data volume per second.
	Avg. Read Latency (us)	Average read latency in a sampling period.	Indicates the average read latency.
	Avg. Write Latency (us)	Average write latency in a sampling period.	Indicates the average write latency.
	Avg. Operation Latency (us)	Average read and write latency in a sampling period.	Indicates the average read and write latency.
	Unmap Command Bandwidth (MB/s)	Data volume of the Unmap command processed per second.	Indicates the data volume of the Unmap command processed per second.
	Unmap Command IOPS (IO/s)	Number of Unmap command requests processed per second.	Indicates the number of Unmap command requests processed per second.
	Avg. Unmap Command I/O Size (KB)	Average size of Unmap command requests in a sampling period.	Indicates the size change of Unmap command requests.
	Avg. Unmap Command I/O Response Time (us)	Average response time of Unmap command requests in a sampling period.	Indicates the size change of Unmap command requests.
	WRITE SAME Command Bandwidth (MB/s)	Data volume of WRITE SAME command requests processed per second.	Indicates the data volume of WRITE SAME command requests processed per second.
	WRITE SAME Command IOPS (IO/s)	Number of WRITE SAME command requests processed per second.	Indicates the number of WRITE SAME command requests processed per second.
	Avg. WRITE SAME Command I/O Size (KB)	Average size of WRITE SAME command requests in a sampling period.	Indicates the size change of WRITE SAME command requests.
	Avg. WRITE SAME Command I/O Response Time (us)	Average response time of WRITE SAME command requests in a sampling period.	Indicates the size change of WRITE SAME command requests.
	Full Copy Command Read Bandwidth (MB/s)	Read data volume of Full Copy command requests processed per second.	Indicates the read data volume of Full Copy command requests processed per second.
	Full Copy Command Read IOPS (IO/s)	Number of Full Copy command read requests processed per second.	Indicates the number of Full Copy command read requests processed per second.
	Avg. Full Copy Command Read I/O Size (KB)	Average size of Full Copy command read requests in a sampling period.	Indicates the size change of Full Copy command read requests.
	Avg. Full Copy Command Read I/O Response Time (us)	Average response time of Full Copy command read requests in a sampling period.	Indicates the size change of Full Copy command read requests.
	Full Copy Command Write Bandwidth (MB/s)	Write data volume of Full Copy command requests processed per second.	Indicates the write data volume of Full Copy command requests processed per second.
	Full Copy Command Write IOPS (IO/s)	Number of Full Copy command write requests processed per second.	Indicates the number of Full Copy command write requests processed per second.
	Avg. Full Copy Command Write I/O Size (KB)	Average size of Full Copy command write requests in a sampling period.	Indicates the size change of Full Copy command write requests.
	Avg. Full Copy Command Write I/O Response Time (us)	Average response time of Full Copy command write requests in a sampling period.	Indicates the size change of Full Copy command write requests.
Storage pool	IOPS (IO/s)^b	Average number of I/O requests processed by a module per second.	Indicates the number of I/O requests received per second.
	Read IOPS (IO/s)^b	Average number of read requests processed by a module per second.	Indicates the number of read I/O requests received per second.
	Write IOPS (IO/s)^b	Average number of write requests processed by a module per second.	Indicates the number of write I/O requests received per second.
	Read Bandwidth (KB/s)^b	Average read request data volume processed by a module per second.	Indicates the data volume read per second.
	Write Bandwidth (KB/s)^b	Average write request data volume processed by a module per second.	Indicates the data volume written per second.
	Total Bandwidth (KB/s)^b	Average I/O data volume on a module per second.	Indicates the I/O data volume per second.
	Avg. Operation Latency (ms)^b	Average latency of read and write operations on a monitored object in a sampling period.	Indicates the time required to process I/Os.
	Avg. Write Operation Latency (ms)^b	Average latency of write operations on a monitored object in a sampling period.	Indicates the time required to process write I/Os.
	Avg. Read Operation Latency (ms)^b	Average latency of read operations on a monitored object in a sampling period.	Indicates the time required to process read I/Os.
	Avg. Operation Latency (us)	Average latency of read and write operations on a monitored object in a sampling period. NOTE: Compared with Avg. Operation Latency (ms), Avg. Operation Latency (us) is more accurate and the monitored performance data is more accurate and complete.	Indicates the time required to process I/Os.
	Avg. Write Operation Latency (us)	Average latency of write operations on a monitored object in a sampling period. NOTE: Compared with Avg. Write Operation Latency (ms), Avg. Write Operation Latency (us) is more accurate and the monitored performance data is more accurate and complete.	Indicates the time required to process write I/Os.
	Avg. Read Operation Latency (us)	Average latency of read operations on a monitored object in a sampling period. NOTE: Compared with Avg. Read Operation Latency (ms), Avg. Read Operation Latency (us) is more accurate and the monitored performance data is more accurate and complete.	Indicates the time required to process read I/Os.
	Capacity Usage (%)^a	Percentage of the used capacity of a storage pool.	Indicates the percentage of the used capacity in a storage pool.
	Avg. Read I/O Size (KB)	Average read I/O size from the last sampling time point till now.	Indicates changes in the read I/O size.
	Avg. Write I/O Size (KB)	Average write I/O size from the last sampling time point till now.	Indicates changes in the write I/O size.
	EDS Service IOPS (IO/s)	Average number of I/O requests of the EDS service on a storage node per second.	Indicates the number of I/Os received by the EDS service on a storage node per second.
	EDS Service Read IOPS (IO/s)	Average number of read requests processed by the EDS service on a storage node per second.	Indicates the total number of read I/Os received by the EDS service on a storage node.
	EDS Service Write IOPS (IO/s)	Average number of write requests processed by the EDS service on a storage node per second.	Indicates the total number of write I/Os received by the EDS service on a storage node.
	EDS Service Bandwidth (KB/s)	Average bandwidth of the EDS service on a storage node per second.	Indicates the bandwidth received by the EDS service on a storage node per second.
	EDS Service Read Bandwidth (KB/s)	Average read bandwidth processed by the EDS service on a storage node per second.	Indicates the total read bandwidth received by the EDS service on a storage node.
	EDS Service Write Bandwidth (KB/s)	Average write bandwidth processed by the EDS service on a storage node per second.	Indicates the total write bandwidth received by the EDS service on a storage node.
	Avg. EDS Service Latency (ms)	Average read and write latency of the EDS service on a storage node in a sampling period.	Indicates the average time required for read and write requests of the EDS service on a storage node.
	Avg. EDS Service Read Latency (ms)	Average read operation latency of the EDS service on a storage node in a sampling period.	Indicates the average time required for read requests of the EDS service on a storage node.
	Avg. EDS Service Write Latency (ms)	Average write operation latency of the EDS service on a storage node in a sampling period.	Indicates the average time required for write requests of the EDS service on a storage node.
	Unmap Command Bandwidth (MB/s)	Average data volume of Unmap command requests processed by a module per second in the SCSI protocol or average data volume of Write Zero command requests processed by a module per second in the NoF protocol.	Indicates the data volume of Unmap command requests received per second in the SCSI protocol or the data volume of Write Zero command requests received per second in the NoF protocol.
	Unmap Command IOPS (IO/s)	Average number of Unmap command requests processed by a module per second in the SCSI protocol or average number of Write Zero command requests processed by a module per second in the NoF protocol.	Indicates the average number of Unmap command requests received per second in the SCSI protocol or the average number of Write Zero command requests received per second in the NoF protocol.
	Avg. Unmap Command I/O Size (KB)	Average size of Unmap command requests from the last sampling point in time till now in the SCSI protocol or average size of Write Zero command requests from the last sampling point in time till now in the NoF protocol.	Indicates the size change of Unmap command requests in the SCSI protocol or the size change of Write Zero command requests in the NoF protocol.
	Avg. Unmap Command I/O Response Time (us)	Average response time of Unmap command requests in a statistical period in the SCSI protocol or average response time of Write Zero command requests in a statistical period in the NoF protocol. By default, one statistical period is five seconds.	Indicates the average time from receiving an Unmap command request to completing the processing of the request in the SCSI protocol or the average time from receiving a Write Zero command request to completing the processing of the request in the NoF protocol.
	WRITE SAME Command Bandwidth (MB/s)	Average data volume of WRITE SAME command requests processed by a module per second.	Indicates the data volume of WRITE SAME command requests received per second.
	WRITE SAME Command IOPS (IO/s)	Average number of WRITE SAME command requests processed by a module per second.	Indicates the average number of WRITE SAME command requests received per second.
	Avg. WRITE SAME Command I/O Size (KB)	Average size of WRITE SAME command requests from the last sampling point in time till now.	Indicates the size change of WRITE SAME command requests.
	Avg. WRITE SAME Command I/O Response Time (us)	Average response time of WRITE SAME command requests in a statistical period. By default, one statistical period is five seconds.	Indicates the average duration from the time when a WRITE SAME command request is received to the time when the request is processed.
	Full Copy Command Read Bandwidth (MB/s)	Average data volume of Full Copy command read requests processed by a module per second.	Indicates the data volume of Full Copy command read requests received per second.
	Full Copy Command Read IOPS (IO/s)	Average number of Full Copy command read requests processed by a module per second.	Indicates the average number of Full Copy command read requests received per second.
	Avg. Full Copy Command Read I/O Size (KB)	Average size of Full Copy command read requests from the last sampling point in time till now.	Indicates the size change of Full Copy command read requests.
	Avg. Full Copy Command Read I/O Response Time (us)	Average response time of Full Copy command read requests in a statistical period. By default, one statistical period is five seconds.	Indicates the average duration from the time when a Full Copy command read request is received to the time when the request is processed.
	Full Copy Command Write Bandwidth (MB/s)	Average data volume of Full Copy command write requests processed by a module per second.	Indicates the data volume of Full Copy command write requests received per second.
	Full Copy Command Write IOPS (IO/s)	Average number of Full Copy command write requests processed by a module per second.	Indicates the average number of Full Copy command write requests received per second.
	Avg. Full Copy Command Write I/O Size (KB)	Average size of Full Copy command write requests from the last sampling point in time till now.	Indicates the size change of Full Copy command write requests.
	Avg. Full Copy Command Write I/O Response Time (us)	Average response time of Full Copy command write requests in a statistical period. By default, one statistical period is five seconds.	Indicates the average duration from the time when a Full Copy command write request is received to the time when the request is processed.
	IOPS in I/O Range [0 KB, 4 KB) (IO/s)	Average number of I/O requests within [0 KB, 4 KB) processed by a module per second.	Indicates the number of I/O requests within this size range processed per second.
	Bandwidth in I/O Range [0 KB, 4 KB) (MB/s)	Average data volume of I/O requests within [0 KB, 4 KB) processed by a module per second.	Indicates the data volume of I/O requests within this size range processed per second.
	Latency in I/O Range [0 KB, 4 KB) (us)	Average latency of read and write operations within [0 KB, 4 KB) in a sampling period.	Indicates the average time for processing I/O requests within this size range.
	IOPS in I/O Range [4 KB, 16 KB) (IO/s)	Average number of I/O requests within [4 KB, 16 KB) processed by a module per second.	Indicates the number of I/O requests within this size range processed per second.
	Bandwidth in I/O Range [4 KB, 16 KB) (MB/s)	Average data volume of I/O requests within [4 KB, 16 KB) processed by a module per second.	Indicates the data volume of I/O requests within this size range processed per second.
	Latency in I/O Range [4 KB, 16 KB) (us)	Average latency of read and write operations within [4 KB, 16 KB) in a sampling period.	Indicates the average time for processing I/O requests within this size range.
	IOPS in I/O Range [16 KB, 64 KB) (IO/s)	Average number of I/O requests within [16 KB, 64 KB) processed by a module per second.	Indicates the number of I/O requests within this size range processed per second.
	Bandwidth in I/O Range [16 KB, 64 KB) (MB/s)	Average data volume of I/O requests within [16 KB, 64 KB) processed by a module per second.	Indicates the data volume of I/O requests within this size range processed per second.
	Latency in I/O Range [16 KB, 64 KB) (us)	Average latency of read and write operations within [16 KB, 64 KB) in a sampling period.	Indicates the average time for processing I/O requests within this size range.
	IOPS in I/O Range [64 KB, 128 KB) (IO/s)	Average number of I/O requests within [64 KB, 128 KB) processed by a module per second.	Indicates the number of I/O requests within this size range processed per second.
	Bandwidth in I/O Range [64 KB, 128 KB) (MB/s)	Average data volume of I/O requests within [64 KB, 128 KB) processed by a module per second.	Indicates the data volume of I/O requests within this size range processed per second.
	Latency in I/O Range [64 KB, 128 KB) (us)	Average latency of read and write operations within [64 KB, 128 KB) in a sampling period.	Indicates the average time for processing I/O requests within this size range.
	IOPS in I/O Range [128 KB, 256 KB) (IO/s)	Average number of I/O requests within [128 KB, 256 KB) processed by a module per second.	Indicates the number of I/O requests within this size range processed per second.
	Bandwidth in I/O Range [128 KB, 256 KB) (MB/s)	Average data volume of I/O requests within [128 KB, 256 KB) processed by a module per second.	Indicates the data volume of I/O requests within this size range processed per second.
	Latency in I/O Range [128 KB, 256 KB) (us)	Average latency of read and write operations within [128 KB, 256 KB) in a sampling period.	Indicates the average time for processing I/O requests within this size range.
	IOPS in I/O Range [256 KB, 512 KB) (IO/s)	Average number of I/O requests within [256 KB, 512 KB) processed by a module per second.	Indicates the number of I/O requests within this size range processed per second.
	Bandwidth in I/O Range [256 KB, 512 KB) (MB/s)	Average data volume of I/O requests within [256 KB, 512 KB) processed by a module per second.	Indicates the data volume of I/O requests within this size range processed per second.
	Latency in I/O Range [256 KB, 512 KB) (us)	Average latency of read and write operations within [256 KB, 512 KB) in a sampling period.	Indicates the average time for processing I/O requests within this size range.
	IOPS in I/O Range [512 KB, 1024 KB) (IO/s)	Average number of I/O requests within [512 KB, 1024 KB) processed by a module per second.	Indicates the number of I/O requests within this size range processed per second.
	Bandwidth in I/O Range [512 KB, 1024 KB) (MB/s)	Average data volume of I/O requests within [512 KB, 1024 KB)processed by a module per second.	Indicates the data volume of I/O requests within this size range processed per second.
	Latency in I/O Range [512 KB, 1024 KB) (us)	Average latency of read and write operations within [512 KB, 1024 KB)in a sampling period.	Indicates the average time for processing I/O requests within this size range.
	IOPS in I/O Range [1024 KB, +∞) (IO/s)	Average number of I/O requests within [1024 KB, +∞) processed by a module per second.	Indicates the number of I/O requests within this size range processed per second.
	Bandwidth in I/O Range [1024 KB, +∞) (MB/s)	Data volume of I/O requests within [1024 KB, +∞) processed by a module per second.	Indicates the data volume of I/O requests within this size range processed per second.
	Latency in I/O Range [1024 KB, +∞) (us)	Average latency of read and write operations within [1024 KB, +∞) in a sampling period.	Indicates the average time for processing I/O requests within this size range.
Disk	IOPS (IO/s)^b	Average number of I/O requests processed by a module per second.	Indicates the number of I/O requests received per second.
	Read IOPS (IO/s)^b	Average number of read requests processed by a module per second.	Indicates the number of read I/O requests received per second.
	Write IOPS (IO/s)^b	Average number of write requests processed by a module per second.	Indicates the number of write I/O requests received per second.
	Read Bandwidth (KB/s)^b	Average read request data volume processed by a module per second.	Indicates the data volume read per second.
	Write Bandwidth (KB/s)^b	Average write request data volume processed by a module per second.	Indicates the data volume written per second.
	Total Bandwidth (KB/s)^b	Average I/O data volume on a module per second.	Indicates the I/O data volume per second.
	Avg. Operation Latency (ms)^b	Average latency of read and write operations on a monitored object in a sampling period.	Indicates the time required to process I/Os.
	Avg. Write Operation Latency (ms)^b	Average latency of write operations on a monitored object in a sampling period.	Indicates the time required to process write I/Os.
	Avg. Read Operation Latency (ms)^b	Average latency of read operations on a monitored object in a sampling period.	Indicates the time required to process read I/Os.
	Avg. Operation Latency (us)	Average latency of read and write operations on a monitored object in a sampling period. NOTE: Compared with Avg. Operation Latency (ms), Avg. Operation Latency (us) is more accurate and the monitored performance data is more accurate and complete.	Indicates the time required to process I/Os.
	Avg. Write Operation Latency (us)	Average latency of write operations on a monitored object in a sampling period. NOTE: Compared with Avg. Write Operation Latency (ms), Avg. Write Operation Latency (us) is more accurate and the monitored performance data is more accurate and complete.	Indicates the time required to process write I/Os.
	Avg. Read Operation Latency (us)	Average latency of read operations on a monitored object in a sampling period. NOTE: Compared with Avg. Read Operation Latency (ms), Avg. Read Operation Latency (us) is more accurate and the monitored performance data is more accurate and complete.	Indicates the time required to process read I/Os.
	Usage (%)^b	Request processing time and queuing time/Statistical period.	Indicates the usage of the specified object.
	Avg. Read I/O Size (KB)	Average read I/O size from the last sampling time point till now.	Indicates changes in the read I/O size.
	Avg. Write I/O Size (KB)	Average write I/O size from the last sampling time point till now.	Indicates changes in the write I/O size.
Volume	IOPS (IO/s)^b	Average number of I/O requests processed by a module per second.	Indicates the number of I/O requests received per second.
	Read IOPS (IO/s)^b	Average number of read requests processed by a module per second.	Indicates the number of read I/O requests received per second.
	Write IOPS (IO/s)^b	Average number of write requests processed by a module per second.	Indicates the number of write I/O requests received per second.
	Read Bandwidth (KB/s)^b	Average read request data volume processed by a module per second.	Indicates the data volume read per second.
	Write Bandwidth (KB/s)^b	Average write request data volume processed by a module per second.	Indicates the data volume written per second.
	Total Bandwidth (KB/s)^b	Average I/O data volume on a module per second.	Indicates the I/O data volume per second.
	Avg. Operation Latency (ms)^b	Average latency of read and write operations on a monitored object in a sampling period.	Indicates the time required to process I/Os.
	Avg. Write Operation Latency (ms)^b	Average latency of write operations on a monitored object in a sampling period.	Indicates the time required to process write I/Os.
	Avg. Read Operation Latency (ms)^b	Average latency of read operations on a monitored object in a sampling period.	Indicates the time required to process read I/Os.
	Avg. Read I/O Size (KB)	Average read I/O size from the last sampling time point till now.	Indicates changes in the read I/O size.
	Avg. Write I/O Size (KB)	Average write I/O size from the last sampling time point till now.	Indicates changes in the write I/O size.
	Volume Capacity Usage (%)	Percentage of the used capacity to the total capacity of a volume.	Indicates the capacity usage of a volume.
	Unmap Command Bandwidth (MB/s)	Average data volume of Unmap command requests processed by a module per second in the SCSI protocol or average data volume of Write Zero command requests processed by a module per second in the NoF protocol.	Indicates the data volume of Unmap command requests received per second in the SCSI protocol or the data volume of Write Zero command requests received per second in the NoF protocol.
	Unmap Command IOPS (IO/s)	Average number of Unmap command requests processed by a module per second in the SCSI protocol or average number of Write Zero command requests processed by a module per second in the NoF protocol.	Indicates the average number of Unmap command requests received per second in the SCSI protocol or the average number of Write Zero command requests received per second in the NoF protocol.
	Avg. Unmap Command I/O Size (KB)	Average size of Unmap command requests from the last sampling point in time till now in the SCSI protocol or average size of Write Zero command requests from the last sampling point in time till now in the NoF protocol.	Indicates the size change of Unmap command requests in the SCSI protocol or the size change of Write Zero command requests in the NoF protocol.
	Avg. Unmap Command I/O Response Time (us)	Average response time of Unmap command requests in a statistical period in the SCSI protocol or average response time of Write Zero command requests in a statistical period in the NoF protocol. By default, one statistical period is five seconds.	Indicates the average time from receiving an Unmap command request to completing the processing of the request in the SCSI protocol or the average time from receiving a Write Zero command request to completing the processing of the request in the NoF protocol.
	WRITE SAME Command Bandwidth (MB/s)	Average data volume of WRITE SAME command requests processed by a module per second.	Indicates the data volume of WRITE SAME command requests received per second.
	WRITE SAME Command IOPS (IO/s)	Average number of WRITE SAME command requests processed by a module per second.	Indicates the average number of WRITE SAME command requests received per second.
	Avg. WRITE SAME Command I/O Size (KB)	Average size of WRITE SAME command requests from the last sampling point in time till now.	Indicates the size change of WRITE SAME command requests.
	Avg. WRITE SAME Command I/O Response Time (us)	Average response time of WRITE SAME command requests in a statistical period. By default, one statistical period is five seconds.	Indicates the average duration from the time when a WRITE SAME command request is received to the time when the request is processed.
	Full Copy Command Read Bandwidth (MB/s)	Average data volume of Full Copy command read requests processed by a module per second.	Indicates the data volume of Full Copy command read requests received per second.
	Full Copy Command Read IOPS (IO/s)	Average number of Full Copy command read requests processed by a module per second.	Indicates the average number of Full Copy command read requests received per second.
	Avg. Full Copy Command Read I/O Size (KB)	Average size of Full Copy command read requests from the last sampling point in time till now.	Indicates the size change of Full Copy command read requests.
	Avg. Full Copy Command Read I/O Response Time (us)	Average response time of Full Copy command read requests in a statistical period. By default, one statistical period is five seconds.	Indicates the average duration from the time when a Full Copy command read request is received to the time when the request is processed.
	Full Copy Command Write Bandwidth (MB/s)	Average data volume of Full Copy command write requests processed by a module per second.	Indicates the data volume of Full Copy command write requests received per second.
	Full Copy Command Write IOPS (IO/s)	Average number of Full Copy command write requests processed by a module per second.	Indicates the average number of Full Copy command write requests received per second.
	Avg. Full Copy Command Write I/O Size (KB)	Average size of Full Copy command write requests from the last sampling point in time till now.	Indicates the size change of Full Copy command write requests.
	Avg. Full Copy Command Write I/O Response Time (us)	Average response time of Full Copy command write requests in a statistical period. By default, one statistical period is five seconds.	Indicates the average duration from the time when a Full Copy command write request is received to the time when the request is processed.
Volume migration	Bandwidth (KB/s)	Average I/O data volume on a module per second.	Indicates the I/O data volume per second.
Initiator	IOPS (IO/s)^b	Average number of I/O requests processed by a module per second.	Indicates the number of I/O requests received per second.
	Read IOPS (IO/s)^b	Average number of read requests processed by a module per second.	Indicates the number of read I/O requests received per second.
	Write IOPS (IO/s)^b	Average number of write requests processed by a module per second.	Indicates the number of write I/O requests received per second.
	Read Bandwidth (KB/s)^b	Average read request data volume processed by a module per second.	Indicates the data volume read per second.
	Write Bandwidth (KB/s)^b	Average write request data volume processed by a module per second.	Indicates the data volume written per second.
	Total Bandwidth (KB/s)^b	Average I/O data volume on a module per second.	Indicates the I/O data volume per second.
	Avg. Operation Latency (ms)^b	Average latency of read and write operations on a monitored object in a sampling period.	Indicates the time required to process I/Os.
	Avg. Write Operation Latency (ms)^b	Average latency of write operations on a monitored object in a sampling period.	Indicates the time required to process write I/Os.
	Avg. Read Operation Latency (ms)^b	Average latency of read operations on a monitored object in a sampling period.	Indicates the time required to process read I/Os.
	Avg. Read I/O Size (KB)	Average read I/O size from the last sampling time point till now.	Indicates changes in the read I/O size.
	Avg. Write I/O Size (KB)	Average write I/O size from the last sampling time point till now.	Indicates changes in the write I/O size.
Physical port	Read Bandwidth (KB/s)^b	Average read request data volume processed by a module per second.	Indicates the data volume read per second.
	Write Bandwidth (KB/s)^b	Average write request data volume processed by a module per second.	Indicates the data volume written per second.
	Bandwidth (KB/s)^b	Average I/O data volume on a module per second.	Indicates the I/O data volume per second.
	IOPS (IO/s)	Average number of I/O requests processed by a module per second.	Indicates the number of I/O requests received per second.
	Read IOPS (IO/s)	Average number of read requests processed by a module per second.	Indicates the number of read I/O requests received per second.
	Write IOPS (IO/s)	Average number of write requests processed by a module per second.	Indicates the number of write I/O requests received per second.
	Usage (%)^b	Request processing time and queuing time/Statistical period.	Indicates the usage of the specified object.
Replication link	IOPS(IO/s)^a	Average number of I/O requests processed by a module per second.	Indicates the number of I/O requests received per second.
	Sending Bandwidth for Replication (KB/s)^a	Average I/O data volume that is sent from the local device to a remote device per second.	Indicates the I/O data volume sent per second.
	Receiving Bandwidth for Replication (KB/s)^a	Average I/O data volume that is received from a remote device to the local device per second.	Indicates the I/O data volume received per second.
	Avg. I/O Response Time (ns)^a	Time of processing one request by a module, including the waiting time.	Indicates the speed of I/O request processing. The longer the queue is, the longer the system takes to respond to a request. For a specified load, response time is in direct proportion to queue length.
	Max. I/O Response Time (ns)^a	Maximum average I/O response time in all statistical periods after the performance statistics collection starts. The average I/O response time refers to the time required to process one read or write request within a statistical period. The response time includes the waiting time. By default, one statistical period is five seconds.	Indicates the maximum duration of the system responding to a read/write request.
Remote replication consistency group	Synchronization Duration (s)^a	Synchronization duration in the statistical period.	Indicates the distribution of synchronization duration (s) in asynchronous remote replication.
Remote replication pair	Synchronization Duration (s)^a	Synchronization duration in the statistical period.	Indicates the distribution of synchronization duration (s) in asynchronous remote replication.
	Time Since Last Synchronization (s)^a^b	Time interval between the current system time and the start time of last remote replication.	Indicates the time interval between the current system time and the start time of last remote replication.
	Logical Bandwidth (KB/s)^a	Average I/O data volume on a module per second before compression.	Indicates the I/O data volume per second before compression.
	Time Difference (s)^a^b	Time difference between the data synchronization points in time of the primary and secondary resources in a synchronization period of asynchronous remote replication.	Indicates the time difference between the data synchronization points in time of the primary and secondary resources in a synchronization period of asynchronous remote replication.
Host	Total IOPS (IO/s)	Average number of I/O requests processed by a module per second.	Indicates the number of I/O requests received per second.
	Read IOPS (IO/s)	Average number of read requests processed by a module per second.	Indicates the total number of received read I/O requests.
	Write IOPS (IO/s)	Average number of write requests processed by a module per second.	Indicates the total number of received write I/O requests.
	Read Bandwidth (KB/s)	Average read request data volume processed by a module per second.	Indicates the data volume read per second. (The read bandwidth of a remote device, IP replication link, iSCSI replication link, or Fibre Channel replication link indicates the average read I/O data volume sent from the current device to the remote device per second.)
	Write Bandwidth (KB/s)	Average write request data volume processed by a module per second.	Indicates the data volume written per second. (The write bandwidth of a remote device, IP replication link, iSCSI replication link, or Fibre Channel replication link indicates the average write I/O data volume sent from the current device to the remote device per second.)
	Bandwidth (KB/s)	Average I/O data volume on a module per second.	Indicates the I/O data volume per second. (The total bandwidth of a remote device, IP replication link, iSCSI replication link, or Fibre Channel replication link indicates the average read and write I/O data volume sent from the current device to the remote device per second.)
	Avg. Write Operation Latency (ms)	Average latency of write operations on a monitored object in a sampling period.	Indicates the average time required by a file system to process write requests from an NFS or CIFS client.
	Avg. Read Operation Latency (ms)	Average latency of read operations on a monitored object in a sampling period.	Indicates the average time required by a file system to process read requests from an NFS or CIFS client.
	Avg. Operation Latency (ms)	Average latency of read and write operations on a monitored object in a sampling period.	Indicates the average time required by a file system to process read/write requests from an NFS or CIFS client.
	Avg. Read I/O Size (KB)	Average read I/O size from the last sampling time point till now.	Indicates changes in the read I/O size.
	Avg. Write I/O Size (KB)	Average write I/O size from the last sampling time point till now.	Indicates changes in the write I/O size.
	Queue Length	Number of requests being processed and waiting to be processed at a specific point of time.	Indicates the length of a queue, which is used to determine service load status.
	Unmap Command Bandwidth (MB/s)	Average data volume of Unmap command requests processed by a module per second in the SCSI protocol or average data volume of Write Zero command requests processed by a module per second in the NoF protocol.	Indicates the data volume of Unmap command requests received per second in the SCSI protocol or the data volume of Write Zero command requests received per second in the NoF protocol.
	Unmap Command IOPS (IO/s)	Average number of Unmap command requests processed by a module per second in the SCSI protocol or average number of Write Zero command requests processed by a module per second in the NoF protocol.	Indicates the average number of Unmap command requests received per second in the SCSI protocol or the average number of Write Zero command requests received per second in the NoF protocol.
	Avg. Unmap Command I/O Size (KB)	Average size of Unmap command requests from the last sampling point in time till now in the SCSI protocol or average size of Write Zero command requests from the last sampling point in time till now in the NoF protocol.	Indicates the size change of Unmap command requests in the SCSI protocol or the size change of Write Zero command requests in the NoF protocol.
	Avg. Unmap Command I/O Response Time (us)	Average response time of Unmap command requests in a statistical period in the SCSI protocol or average response time of Write Zero command requests in a statistical period in the NoF protocol. By default, one statistical period is five seconds.	Indicates the average time from receiving an Unmap command request to completing the processing of the request in the SCSI protocol or the average time from receiving a Write Zero command request to completing the processing of the request in the NoF protocol.
	WRITE SAME Command Bandwidth (MB/s)	Average data volume of WRITE SAME command requests processed by a module per second.	Indicates the data volume of WRITE SAME command requests received per second.
	WRITE SAME Command IOPS (IO/s)	Average number of WRITE SAME command requests processed by a module per second.	Indicates the average number of WRITE SAME command requests received per second.
	Avg. WRITE SAME Command I/O Size (KB)	Average size of WRITE SAME command requests from the last sampling point in time till now.	Indicates the size change of WRITE SAME command requests.
	Avg. WRITE SAME Command I/O Response Time (us)	Average response time of WRITE SAME command requests in a statistical period. By default, one statistical period is five seconds.	Indicates the average duration from the time when a WRITE SAME command request is received to the time when the request is processed.
	Full Copy Command Read Bandwidth (MB/s)	Average data volume of Full Copy command read requests processed by a module per second.	Indicates the data volume of Full Copy command read requests received per second.
	Full Copy Command Read IOPS (IO/s)	Average number of Full Copy command read requests processed by a module per second.	Indicates the average number of Full Copy command read requests received per second.
	Avg. Full Copy Command Read I/O Size (KB)	Average size of Full Copy command read requests from the last sampling point in time till now.	Indicates the size change of Full Copy command read requests.
	Avg. Full Copy Command Read I/O Response Time (us)	Average response time of Full Copy command read requests in a statistical period. By default, one statistical period is five seconds.	Indicates the average duration from the time when a Full Copy command read request is received to the time when the request is processed.
	Full Copy Command Write Bandwidth (MB/s)	Average data volume of Full Copy command write requests processed by a module per second.	Indicates the data volume of Full Copy command write requests received per second.
	Full Copy Command Write IOPS (IO/s)	Average number of Full Copy command write requests processed by a module per second.	Indicates the average number of Full Copy command write requests received per second.
	Avg. Full Copy Command Write I/O Size (KB)	Average size of Full Copy command write requests from the last sampling point in time till now.	Indicates the size change of Full Copy command write requests.
	Avg. Full Copy Command Write I/O Response Time (us)	Average response time of Full Copy command write requests in a statistical period. By default, one statistical period is five seconds.	Indicates the average duration from the time when a Full Copy command write request is received to the time when the request is processed.
VBS client	Total IOPS (IO/s)	Average number of I/O requests processed by a module per second.	Indicates the number of I/O requests received per second.
	Read IOPS (IO/s)	Average number of read requests processed by a module per second.	Indicates the total number of received read I/O requests.
	Write IOPS (IO/s)	Average number of write requests processed by a module per second.	Indicates the total number of received write I/O requests.
	Read Bandwidth (KB/s)	Average read request data volume processed by a module per second.	Indicates the data volume read per second. (The read bandwidth of a remote device, IP replication link, iSCSI replication link, or Fibre Channel replication link indicates the average read I/O data volume sent from the current device to the remote device per second.)
	Write Bandwidth (KB/s)	Average write request data volume processed by a module per second.	Indicates the data volume written per second. (The write bandwidth of a remote device, IP replication link, iSCSI replication link, or Fibre Channel replication link indicates the average write I/O data volume sent from the current device to the remote device per second.)
	Total Bandwidth (KB/s)	Average I/O data volume on a module per second.	Indicates the I/O data volume per second. (The total bandwidth of a remote device, IP replication link, iSCSI replication link, or Fibre Channel replication link indicates the average read and write I/O data volume sent from the current device to the remote device per second.)
	Avg. Write Operation Latency (ms)	Average latency of write operations on a monitored object in a sampling period.	Indicates the average time required by a file system to process write requests from an NFS or CIFS client.
	Avg. Read Operation Latency (ms)	Average latency of read operations on a monitored object in a sampling period.	Indicates the average time required by a file system to process read requests from an NFS or CIFS client.
	Avg. Operation Latency (ms)	Average latency of read and write operations on a monitored object in a sampling period.	Indicates the average time required by a file system to process read/write requests from an NFS or CIFS client.
	Avg. Read I/O Size (KB)	Average read I/O size from the last sampling time point till now.	Indicates changes in the read I/O size.
	Avg. Write I/O Size (KB)	Average write I/O size from the last sampling time point till now.	Indicates changes in the write I/O size.
	Queue Length	Number of requests being processed and waiting to be processed at a specific point of time.	Indicates the length of a queue, which is used to determine service load status.
	Unmap Command Bandwidth (MB/s)	Average data volume of Unmap command requests processed by a module per second in the SCSI protocol or average data volume of Write Zero command requests processed by a module per second in the NoF protocol.	Indicates the data volume of Unmap command requests received per second in the SCSI protocol or the data volume of Write Zero command requests received per second in the NoF protocol.
	Unmap Command IOPS (IO/s)	Average number of Unmap command requests processed by a module per second in the SCSI protocol or average number of Write Zero command requests processed by a module per second in the NoF protocol.	Indicates the average number of Unmap command requests received per second in the SCSI protocol or the average number of Write Zero command requests received per second in the NoF protocol.
	Avg. Unmap Command I/O Size (KB)	Average size of Unmap command requests from the last sampling point in time till now in the SCSI protocol or average size of Write Zero command requests from the last sampling point in time till now in the NoF protocol.	Indicates the size change of Unmap command requests in the SCSI protocol or the size change of Write Zero command requests in the NoF protocol.
	Avg. Unmap Command I/O Response Time (us)	Average response time of Unmap command requests in a statistical period in the SCSI protocol or average response time of Write Zero command requests in a statistical period in the NoF protocol. By default, one statistical period is five seconds.	Indicates the average time from receiving an Unmap command request to completing the processing of the request in the SCSI protocol or the average time from receiving a Write Zero command request to completing the processing of the request in the NoF protocol.
	WRITE SAME Command Bandwidth (MB/s)	Average data volume of WRITE SAME command requests processed by a module per second.	Indicates the data volume of WRITE SAME command requests received per second.
	WRITE SAME Command IOPS (IO/s)	Average number of WRITE SAME command requests processed by a module per second.	Indicates the average number of WRITE SAME command requests received per second.
	Avg. WRITE SAME Command I/O Size (KB)	Average size of WRITE SAME command requests from the last sampling point in time till now.	Indicates the size change of WRITE SAME command requests.
	Avg. WRITE SAME Command I/O Response Time (us)	Average response time of WRITE SAME command requests in a statistical period. By default, one statistical period is five seconds.	Indicates the average duration from the time when a WRITE SAME command request is received to the time when the request is processed.
	Full Copy Command Read Bandwidth (MB/s)	Average data volume of Full Copy command read requests processed by a module per second.	Indicates the data volume of Full Copy command read requests received per second.
	Full Copy Command Read IOPS (IO/s)	Average number of Full Copy command read requests processed by a module per second.	Indicates the average number of Full Copy command read requests received per second.
	Avg. Full Copy Command Read I/O Size (KB)	Average size of Full Copy command read requests from the last sampling point in time till now.	Indicates the size change of Full Copy command read requests.
	Avg. Full Copy Command Read I/O Response Time (us)	Average response time of Full Copy command read requests in a statistical period. By default, one statistical period is five seconds.	Indicates the average duration from the time when a Full Copy command read request is received to the time when the request is processed.
	Full Copy Command Write Bandwidth (MB/s)	Average data volume of Full Copy command write requests processed by a module per second.	Indicates the data volume of Full Copy command write requests received per second.
	Full Copy Command Write IOPS (IO/s)	Average number of Full Copy command write requests processed by a module per second.	Indicates the average number of Full Copy command write requests received per second.
	Avg. Full Copy Command Write I/O Size (KB)	Average size of Full Copy command write requests from the last sampling point in time till now.	Indicates the size change of Full Copy command write requests.
	Avg. Full Copy Command Write I/O Response Time (us)	Average response time of Full Copy command write requests in a statistical period. By default, one statistical period is five seconds.	Indicates the average duration from the time when a Full Copy command write request is received to the time when the request is processed.
a: Indicates that the performance metric does not support the Grafana service. b: Indicates that monitoring thresholds can be configured for the performance metric. For details, see Managing Monitoring Thresholds.