Performance metadata for DS8000

View the lists of performance metadata for DS8000 storage systems.

Overview

The performance metadata is divided into the following categories:

Volume metadata

The following key metadata is collected for volume performance:
  • Cache Holding Time
  • Data Rate (Read, Total, Write)
  • Overall I/O Rate (Read, Total, Write)
  • Pool Activity Score
  • Response Time (Overall, Read, Write)
  • Volume Utilization
  • Write-Cache Delay Percentage
The following I/O rate metadata is collected for volume performance:
  • Average Transfer Rate (Cache-to-Disk, Disk-to-Cache)
  • High Performance FICON® (Read, Total, Write)
  • Normal I/O Rate (Read, Total, Write)
  • PPRC Transfer Rate
  • Record Mode Read I/O Rate
  • Sequential I/O Rate (Read, Total, Write)
  • Write-Cache Delay I/O Rate
The following cache hit metadata is collected for volume performance:
  • Normal I/O Cache Hits (Read, Total, Write)
  • Overall I/O Cache Hits (Read, Total, Write)
  • Record Mode Read Cache Hit Percentage
  • Sequential I/O Cache Hits (Read, Total, Write)
The following average miscellaneous metadata is collected for volume performance:
  • Average Transfer Size (Overall, Read, Write)
  • HPF I/O Percentage
  • Sequential I/O Percentage

Disk metadata

The following key metadata is collected for disk performance:
  • Data Rate (Read, Total, Write)
  • Disk Utilization Percentage
  • I/O Rate (Read, Total, Write)
  • Response Time (Overall, Read, Write)
The following transfer size metadata is collected for disk performance:
  • Average Transfer Size (Overall, Read, Write)

Port metadata

The following key metadata is collected for port performance:
  • Bandwidth (Overall, Receive, Send)
  • Data Rate (Receive, Send, Total)
  • I/O Rate (Receive, Send, Write)
  • Port Utilization (Overall, Receive, Send)
  • Response Time (Overall, Receive, Send)
The following I/O rate metadata is collected for port performance:
  • FCP I/O Rate (Receive, Send, Total)
  • FICON I/O Rate (Receive, Send, Total)
The following data rate metadata is collected for port performance:
  • FCP Data Rate (Receive, Send, Total)
  • FICON Data Rate (Receive, Send, Total)
The following response time metadata is collected for port performance:
  • FCP Response Time (Overall, Send, Total)
  • FICON Response Time (Overall, Send, Total)
The following error rate metadata is collected for port performance:
  • Frame Errors (CRC Errors, Error Frame, Invalid Relative Offset Rate)
  • Link Errors (Invalid Link Transmission, Invalid Transmission Words, Link Failures, Primitive Sequence Protocol Error Rate, Sequence Timeouts, Signal Loss, Sync Loss)
  • Overload Errors (Extreme I/O Concurrency Percentage, I/O Busy Percentage, I/O Busy Rate, I/O Overrun Percentage, I/O Overrun Rate)
  • Port Protocol Errors (Credit Recovery Link Resets, Duplicate Frames, Link Reset Received, Link Reset Transmitted, Out of Order ACK, Out of Order Data)
  • Zero Receive Buffer Credit Percentage
  • Zero Send Buffer Credit Percentage
The following remote mirror metadata is collected for port performance:
  • PPRC Data Rate (Receive, Send, Total)
  • PPRC I/O Rate (Receive, Send, Total)
  • PPRC Response Time (Receive, Send)
The following transfer size metadata is collected for port performance:
  • Average Transfer Size (Overall, Receive, Send)