Performance metrics for ports on DS8000 and DS6000 storage systems

You can include performance data for storage system port and port errors on DS8000 and DS6000 storage systems in performance reports.

Port data

You can create performance reports that include the following information:

Port Send I/O Rate (ops/s)
The average number of I/O operations per second for operations in which data is sent from a port.A send operation is a read operation that is processed, or a write operation that is initiated by the port.
Port Receive I/O Rate (ops/s)
The average number of I/O operations per second for operations in which the port receives data.A receive operation is a write operation that is processed, or a read operation that is initiated by the port.
Total Port I/O Rate (ops/s)
The average number of send operations and receive operations per second.
Port FICON Send I/O Rate (ops/s)
The average number of send operations per second for Fibre Channel connection (FICON) usage.
Port FICON Receive I/O Rate (ops/s)
The average number of receive operations per second for FICON usage.
Total Port FICON I/O Rate (ops/s)
The average number of send and receive operations per second for FICON usage.
Port FCP Send I/O Rate (ops/s)
The average number of send operations per second for Fibre Channel Protocol (FCP) usage.
Port FCP Receive I/O Rate (ops/s)
The average number of receive operations per second for FCP usage.
Total Port FCP I/O Rate (ops/s)
The average number of send operations and receive operations per second for FCP usage.
Port PPRC Send I/O Rate (ops/s)
The average number of operations per second that are sent by using the PPRC protocol.
Port PPRC Receive I/O Rate (ops/s)
The average number of operations per second that are received by using the PPRC protocol.
Total Port PPRC I/O Rate (ops/s)
The average number of send operations and receive operations per second using the PPRC protocol.
Port Send Data Rate (MiB/s)
The average rate at which data is sent from the port. The rate is measured in MiB per second. A send operation is a read operation that is processed, or a write operation that is initiated by the port.
Port Receive Data Rate (MiB/s)
The average rate at which data is received by the port. The rate is measured in MiB per second. A receive operation is a write operation that is processed, or a read operation that is initiated by the port.
Total Port Data Rate (MiB/s)
The average rate at which data is transferred through the port. The rate is measured in MiB per second and includes both send and receive operations.
Port FICON Send Data Rate (MiB/s)
The average number of MiB per second that is sent for FICON usage.
Port FICON Receive Data Rate (MiB/s)
The average number of MiB per second that is received for FICON usage.
Total Port FICON Data Rate (MiB/s)
The average number of MiB per second that is transferred for FICON usage. This value includes both send and receive FICON operations.
Port FCP Send Data Rate (MiB/s)
The average number of MiB per second that are sent for FCP usage.
Port FCP Receive Data Rate (MiB/s)
The average number of MiB per second that are received for FCP usage.
Total Port FCP Data Rate (MiB/s)
The average number of MiB per second that are transferred for FCP usage. This value includes both send and receive FCP operations.
Port PPRC Send Data Rate (MiB/s)
The average number of MiB per second that are sent by using the PPRC protocol.
Port PPRC Receive Data Rate (MiB/s)
The average number of MiB per second that are received by using the Peer-to-Peer Remote Copy (PPRC) protocol.
Total Port PPRC Data Rate (MiB/s)
The average number of MiB per second that are transferred by using the PPRC protocol. This value includes both send and receive PPRC operations.
Port Send Response Time (ms/op)
The average number of milliseconds to complete a send operation.
Port Receive Response Time (ms/op)
The average number of milliseconds to complete a receive operation.
Overall Port Response Time (ms/op)
The average number of milliseconds to complete a send or receive operation.
Port FCP Send Response Time (ms/op)
The average number of milliseconds to complete a send operation for FCP usage.
Port FCP Receive Response Time (ms/op)
The average number of milliseconds to complete a receive operation for FCP usage.
Overall Port FCP Response Time (ms/op)
The average number of milliseconds to complete a send or receive operation for FCP usage.
Port FICON Send Response Time (ms/op)
The average number of milliseconds to complete a send operation for FICON usage.
Port FICON Receive Response Time (ms/op)
The average number of milliseconds to complete a receive operation for FICON usage.
Overall Port FICON Response Time (ms/op)
The average number of milliseconds to complete a send or receive operation for FICON usage. This value includes both send and receive FICON operations.
Port PPRC Send Response Time (ms/op)
The average number of milliseconds to complete a send operation by using the PPRC protocol.
Port PPRC Receive Response Time (ms/op)
The average number of milliseconds to complete a receive operation by using the PPRC protocol.
Overall Port PPRC Response Time (ms/op)
The average number of milliseconds to complete a send or receive operation by using the PPRC protocol.
Port Send Transfer Size (KiB/op)
The average number of KiB that are transferred per send operation. A send operation is a read operation that is processed or a write operation that is initiated by the port.
Port Receive Transfer Size (KiB/op)
The average number of KiB that are transferred per receive operation. A receive operation is a write operation that is processed or a read operation that is initiated by the port.
Overall Port Transfer Size (KiB/op)
The average number of KiB that are transferred per I/O operation. This value includes both send and receive operations.
Port Send Utilization Percentage
The average percentage of time that the port is busy sending data.
Port Receive Utilization Percentage
The average percentage of time that the port is busy receiving data.
Overall Port Utilization Percentage
The average percentage of time that the port is busy sending or receiving data.
Port Send Bandwidth Percentage
The percentage of the port bandwidth that is used for send operations. This value is an indicator of port bandwidth usage that is based on the speed of the port.
Port Receive Bandwidth Percentage
The percentage of the port bandwidth that is used for receive operations. This value is an indicator of port bandwidth usage that is based on the speed of the port.
Overall Port Bandwidth Percentage
The percentage of the port bandwidth that is used for send and receive operations. This value is an indicator of port bandwidth usage that is based on the speed of the port.

Port error data

You can create performance reports that include the following information:

Error Frame Rate (count/s)
The average number of error frames per second that are received. An error frame is a frame that violates the Fibre Channel Protocol.
Link Failure Rate (count/s)
The average number of miscellaneous fibre channel link errors per second for ports. Link errors might occur when an unexpected Not Operational (NOS) is received or a link state machine failure was detected.
Loss of Sync Rate (count/s)
The average number of times per second that the port lost synchronization with its partner port. These types of errors usually indicate physical link problems, caused by faulty SFP modules or cables, or caused by faulty connections at the switch or patch panel. However in some cases this can also occur due to mismatching port speeds between the partner ports, when auto-negotiation of link speed is disabled.
Synchronization is assumed lost after a timeout interval expires.
Loss of Signal Rate (count/s)
The average number of times per second at which the port lost communication with its partner port. These types of errors usually indicate physical link problems, caused by faulty SFP modules or cables, or caused by faulty connections at the switch or patch panel. However, in some cases, this error can also occur when the maximum link distance between ports is exceeded, for the type of connecting cable and light source.
CRC Error Rate (count/s)
The average number of frames per second that are received in which a cyclic redundancy check (CRC) error is detected. A CRC error is detected when the CRC in the transmitted frame does not match the CRC computed by the receiver. For Brocade switches, this metric includes only the CRC Errors with a good end-of-frame (EOF) indicator.
Primitive Sequence Protocol Error Rate (count/s)
The average number of primitive sequence protocol errors per second that are detected.
This error occurs when there is a link failure for a port.
Invalid Transmission Word Rate (count/s)
The average number of bit errors per second that are detected.
Out of Order Data Rate (count/s)
The average number of times per second that an out-of-order frame is detected.
Out of Order ACK Rate (count/s)
The average number of times per second that an out-of-order acknowledge (ACK) frame is detected.
An ACK frame is used for end-to-end flow control and is sent to verify receipt of a frame.
Duplicate Frame Rate (count/s)
The average number of duplicate frames per second that are received. A duplicate frame is a frame that the system previously processed for the port.
Invalid Relative Offset Rate (count/s)
The average number of times per second that frames are received with an invalid relative offset in the frame header.
Sequence Timeout Rate (count/s)
The average number of times per second that the port detects a timeout condition after the port receives a sequence initiative for a Fibre Channel exchange.
Link Reset Transmitted Rate (count/s)
The average number of times per second that the port changes from an active (AC) state to a Link Recovery (LR1) state.
Link Reset Received Rate (count/s)
The average number of times per second that the port changes from an active (AC) state to a Link Recovery (LR2) state.
Credit Recovery Link Reset Rate
The estimated average number of link resets per second that a switch or port completed to recover buffer credits. This estimate attempts to disregard link resets that were caused by link initialization. When you troubleshoot a SAN, use this metric to help identify port conditions that might slow the performance of the resources to which those ports are connected.