Performance Indicators

This section lists performance indicators that can be monitored and describes the meaning and significance of those indicators. You can create indicator templates or perform other operations based on the information provided in this section.

Service Type	Item		Definition	Significance
Block service	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	Indicates the I/O data volume per second.
		Avg. Operation Latency (ms)	Average latency of read and write operations on a statistic 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 statistic 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 statistic 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 statistic 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 statistic 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 statistic 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.
	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.
	Node	Avg. Memory Usage (%)	Memory usage in a statistical period. By default, one statistical period is ten seconds.	Indicates the service load on the memory.
	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	Indicates the I/O data volume per second.
		Avg. Operation Latency (ms)^b	Average latency of read and write operations on a statistic 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 statistic 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 statistic 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 statistic 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 statistic 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 statistic 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 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
		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.
	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	Indicates the I/O data volume per second.
		Avg. Operation Latency (ms)^b	Average latency of read and write operations on a statistic 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 statistic 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 statistic object in a sampling period	Indicates the time required to process read I/Os.^b
		Avg. Operation Latency (us)	Average latency of read and write operations on a statistic 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 statistic 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 statistic 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 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	Indicates the I/O data volume per second.
		Avg. Operation Latency (ms)^b	Average latency of read and write operations on a statistic 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 statistic 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 statistic 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.
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.
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 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 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. The default statistical period is five seconds.	Indicates the max. 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	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.
Object service	Cluster	Read Bandwidth (KB/s)^b	Average read request data volume processed by a module per second	Indicates the data volume read by the service plane per second (excluding read data forwarding requests).
		Write Bandwidth (KB/s)^b	Average write request data volume processed by a module per second	Indicates the data volume written to the service plane per second (excluding read data forwarding requests).
		Bandwidth (KB/s)^b	Average I/O data volume on a module per second	Indicates the I/O data volume on the service plane per second (excluding read data forwarding requests).
		Storage Bandwidth (KB/s)	Average I/O data volume on a module per second	Indicates the I/O data volume on the storage plane per second.
		Storage Read Bandwidth (KB/s)	Average read request data volume processed by a module per second	Indicates the data volume read by the storage plane per second.
		Storage Write Bandwidth (KB/s)	Average write request data volume processed by a module per second	Indicates the data volume written to the storage plane per second.
		Object Service DELETEs per Second	Number of object service DELETE requests per second	Indicates the number of object service DELETE requests per second.
		Object Service DELETE Failures per Second	Number of object service DELETE request failures caused by servers per second	Indicates the number of object service DELETE request failures caused by servers per second.
		Object Service DELETE Failures per Second (Client Reason)	Number of object service DELETE request failures caused by clients per second	Indicates the number of object service DELETE request failures caused by clients per second.
		Object Service GETs per Second	Number of object service GET requests per second	Indicates the number of object service GET requests per second.
		Object Service GET Failures per Second	Number of object service GET request failures caused by servers per second	Indicates the number of object service GET request failures caused by servers per second.
		Object Service GET Failures per Second (Client Reason)	Number of object service GET request failures caused by clients per second	Indicates the number of object service GET request failures caused by clients per second.
		Object Service PUTs per Second	Number of object service PUT requests per second	Indicates the number of object service PUT requests per second.
		Object Service PUT Failures per Second	Number of object service PUT request failures caused by servers per second	Indicates the number of object service PUT request failures caused by servers per second.
		Object Service PUT Failures per Second (Client Reason)	Number of object service PUT request failures caused by clients per second	Indicates the number of object service PUT request failures caused by clients per second.
		Object Service Connection Failure Rate (%)	Object service access failure rate every 10 seconds	Indicates the object service access failure rate every 10 seconds.
		Object Service HEADs per Second	Number of object service HEAD requests per second	Indicates the number of object service HEAD requests per second.
		Object Service HEAD Failures per Second	Number of object service HEAD request failures caused by servers per second	Indicates the number of object service HEAD request failures caused by servers per second.
		Object Service HEAD Failures per Second (Client Reason)	Number of object service HEAD request failures caused by clients per second	Indicates the number of object service HEAD request failures caused by clients per second.
		Object Service POSTs per Second	Number of object service POST requests per second	Indicates the number of object service POST requests per second.
		Object Service POST Failures per Second	Number of object service POST request failures caused by servers per second	Indicates the number of object service POST request failures caused by servers per second.
		Object Service POST Failures per Second (Client Reason)	Number of object service POST request failures caused by clients per second	Indicates the number of object service POST request failures caused by clients per second.
		Object Concurrencies^b	Number of object concurrencies on a statistic object	Indicates the number of object concurrencies on clusters or nodes.
	Node	Read Bandwidth (KB/s)	Average read request data volume processed by a module per second	Indicates the data volume read by the service plane per second.
		Write Bandwidth (KB/s)	Average write request data volume processed by a module per second	Indicates the data volume written to the service plane per second.
		Bandwidth (KB/s)	Average I/O data volume on a module per second	Indicates the I/O data volume on the service plane per second.
		Storage Bandwidth (KB/s)	Average I/O data volume on a module per second	Indicates the I/O data volume on the storage plane per second.
		Storage Read Bandwidth (KB/s)	Average read request data volume processed by a module per second	Indicates the data volume read by the storage plane per second.
		Storage Write Bandwidth (KB/s)	Average write request data volume processed by a module per second	Indicates the data volume written to the storage plane 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.
		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.
File service	Cluster	Indicates the NFS Read Bandwidth (KB/s)^b	Average NFS read request data volume processed by a module per second	Indicates the data volume read from NFS per second.
		NFS Write Bandwidth (KB/s)^b	Average NFS write request data volume processed by a module per second	Indicates the data volume written to NFS per second.
		NFS Bandwidth (KB/s)^b	Average NFS I/O data volume on a module per second	Indicates the NFS I/O data volume per second.
		NFS Read OPS^b	Average number of NFS read operations on a module per second	Indicates the number of NFS read operations per second.
		NFS Write OPS^b	Average number of NFS write operations on a module per second	Indicates the number of NFS write operations per second.
		Total NFS OPS	Total number of NFS operations on a module per second	Indicates the total number of NFS operations per second.
		Other NFS OPS	Average number of NFS other operations on a module per second	Indicates the number of NFS other operations per second.
		DPC Read Bandwidth (MB/s)^b	Average DPC protocol read bandwidth on a module per second	Indicates DPC protocol read bandwidth per second.
		DPC Write Bandwidth (MB/s)^b	Average DPC protocol write bandwidth on a module per second	Indicates DPC protocol write bandwidth per second.
		DPC Bandwidth (MB/s)^b	Average DPC protocol bandwidth on a module per second	Indicates DPC protocol bandwidth per second.
		DPC Read OPS^b	Average number of DPC read operations on a module per second	Indicates the number of DPC read operations per second.
		DPC Write OPS^b	Average number of DPC write operations on a module per second	Indicates the number of DPC write operations per second.
		Other DPC OPS	Average number of DPC metadata operations on a module per second	Indicates the number of DPC metadata operations per second.
		Total DPC OPS	Total number of DPC operations on a module per second	Indicates the total number of DPC operations per second.
		CIFS Read Bandwidth (KB/s)^b	Average CIFS read request data volume processed by a module per second	Indicates the CIFS read request data volume processed per second.
		CIFS Write Bandwidth (KB/s)^b	Average CIFS write request data volume processed by a module per second	Indicates the CIFS write request data volume processed per second.
		CIFS Bandwidth (KB/s)^b	Average CIFS I/O data volume processed by a module per second	Indicates the CIFS I/O data volume processed per second.
		CIFS Read OPS^b	Average number of CIFS read operations on a module per second	Indicates the number of CIFS read operations per second.
		CIFS Write OPS^b	Average number of CIFS write operations on a module per second	Indicates the number of CIFS protocol write operations per second.
		Total CIFS OPS	Average number of CIFS protocol operations on a module per second	Indicates the total number of CIFS protocol operations per second.
		Other CIFS OPS	Average number of other CIFS operations on a module per second	Indicates the number of other CIFS operations per second.
		NFS Connections^b	Number of connections between a statistic object and NFS clients	Indicates the number of connections between clusters or nodes and NFS clients.
		CIFS Connections^b	Number of connections between a statistic object and CIFS clients	Indicates the number of connections between clusters or nodes and CIFS clients.
	Node	NFS Read Bandwidth (KB/s)	Average NFS read request data volume processed by a module per second	Indicates the data volume read from NFS per second.
		NFS Write Bandwidth (KB/s)	Average NFS write request data volume processed by a module per second	Indicates the data volume written to NFS per second.
		NFS Bandwidth (KB/s)	Average NFS I/O data volume on a module per second	Indicates the NFS I/O data volume per second.
		NFS Read OPS	Average number of NFS read operations on a module per second	Indicates the number of NFS read operations per second.
		NFS Write OPS	Average number of NFS write operations on a module per second	Indicates the number of NFS write operations per second.
		Total NFS OPS	Total number of NFS operations on a module per second	Indicates the total number of NFS operations per second.
		Other NFS OPS	Average number of NFS other operations on a module per second	Indicates the number of NFS other operations per second.
		NFS Connections	Number of connections between a statistic object and NFS clients	Indicates the number of connections between clusters or nodes and NFS clients.
		Avg. Operation Latency for NFS (us)	Average latency of NFS read and write operations on a statistic object in a sampling period	Indicates the average time required by a node to process an NFS read/write request.
		Max. Operation Latency for NFS (us)	Maximum latency of NFS read and write operations on a statistic object in a sampling period	Indicates the maximum time required by a node to process an NFS read/write request.
		Avg. Write Operation Latency for NFS (us)	Average latency of NFS write operations on a statistic object in a sampling period	Indicates the average time required by a node to process an NFS write request.
		Max. Write Operation Latency for NFS (us)	Maximum latency of NFS write operations on a statistic object in a sampling period	Indicates the maximum time required by a node to process an NFS write request.
		Avg. Read Operation Latency for NFS (us)	Average latency of NFS read operations on a statistic object in a sampling period	Indicates the average time required by a node to process an NFS read request.
		Max. Read Operation Latency for NFS (us)	Maximum latency of NFS read operations on a statistic object in a sampling period	Indicates the maximum time required by a node to process an NFS read request.
		Avg. Latency of Other Operations for NFS (us)	Average latency of NFS other operations on a statistic object in a sampling period	Indicates the average time required by a node to process an NFS other request.
		Max. Latency of Other Operations for NFS (us)	Maximum latency of NFS other operations on a statistic object in a sampling period	Indicates the maximum time required by a node to process an NFS other request.
		CIFS Connections	Number of connections between a statistic object and CIFS clients	Indicates the number of connections between clusters or nodes and CIFS clients.
		CIFS Read Bandwidth (KB/s)	Average CIFS read request data volume processed by a module per second	Indicates the CIFS read request data volume processed per second.
		CIFS Write Bandwidth (KB/s)	Average CIFS write request data volume processed by a module per second	Indicates the CIFS write request data volume processed per second.
		CIFS Bandwidth (KB/s)	Average CIFS I/O data volume processed by a module per second	Indicates the CIFS I/O data volume processed per second.
		CIFS Read OPS	Average number of CIFS read operations on a module per second	Indicates the number of CIFS read operations per second.
		CIFS Write OPS	Average number of CIFS write operations on a module per second	Indicates the number of CIFS write operations per second.
		Total CIFS OPS	Total number of CIFS operations on a module per second	Indicates the total number of CIFS operations per second.
		Other CIFS OPS	Average number of CIFS other operations on a module per second	Indicates the number of CIFS other operations per second.
		Avg. Operation Latency for CIFS (us)	Average latency of CIFS read and write operations on a statistic object in a sampling period	Indicates the average time required by a node to process a CIFS read/write request.
		Max. Operation Latency for CIFS (us)	Maximum latency of CIFS read and write operations on a statistic object in a sampling period	Indicates the maximum time required by a node to process a CIFS read/write request.
		Avg. Write Operation Latency for CIFS (us)	Average latency of CIFS write operations on a statistic object in a sampling period	Indicates the average time required by a node to process a CIFS write request.
		Max. Write Operation Latency for CIFS (us)	Maximum latency of CIFS write operations on a statistic object in a sampling period	Indicates the maximum time required by a node to process a CIFS write request.
		Avg. Read Operation Latency for CIFS (us)	Average latency of CIFS read operations on a statistic object in a sampling period	Indicates the average time required by a node to process a CIFS read request.
		Max. Read Operation Latency for CIFS (us)	Maximum latency of CIFS read operations on a statistic object in a sampling period	Indicates the maximum time required by a node to process a CIFS read request.
		Avg. Latency of Other Operations for CIFS (us)	Average latency of CIFS other operations on a statistic object in a sampling period	Indicates the average time required by a node to process a CIFS other request.
		Max. Latency of Other Operations for CIFS (us)	Maximum latency of CIFS other operations on a statistic object in a sampling period	Indicates the maximum time required by a node to process a CIFS other request.
HDFS service	Cluster Node	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.
		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.
		Total IOPS (IO/s)^b	Average number of I/O requests processed by a module per second	Indicates the number of I/Os received per second.
		HDFS Concurrencies^b	Number of HDFS concurrencies on a statistic object	Indicates the number of HDFS concurrencies on clusters or nodes.
Object service File service HDFS service	Cluster	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.
		Max. CPU Usage (%)^a	Maximum CPU usage of a statistic object in a sampling period	Indicates maximum CPU usage of all nodes.
	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.
	Node	Avg. Memory Usage (%)	Memory usage in a statistical period. By default, one statistical period is ten seconds.	Indicates the service load on the memory.
	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	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.
	Storage pool	Capacity Usage (%)^a	Percentage of the used capacity of a storage pool	Indicates the percentage of used capacity in a storage pool.
	Disk	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.
		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.
		IOPS(IO/s)^b	Average number of I/O requests processed by a module per second	Indicates the number of I/Os received per second.
		Avg. Operation Latency (ms)^b	Average latency of read and write operations on a statistic 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 statistic 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 statistic 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 statistic 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 statistic 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 statistic 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.
	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.
		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.
		IOPS (IO/s)	Average number of I/O requests processed by a module per second	Indicates the number of I/Os received per second.
	Replication link	IOPS(IO/s)^a	Average number of I/O requests processed by a module per second	Indicates the number of I/Os received per second.
		Sending Bandwidth for Replication (KB/s)^a	Average 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 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. The default statistical period is five seconds.	Indicates the max. duration of the system responding to a read/write request.
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.