About the LUN I/O report
The LUN I/O report summarizes the standard I/O data traffic read from and written to the selected LUN for the specified period of time.
The LUN I/O report contains these statistics that summarize the activity:
Total Bytes Read
Displays the total number of bytes read over the WAN.
Average Read Throughput
Displays the average read throughput.
Total Bytes Written
Displays the total number of bytes written over the WAN.
Average Write Throughput
Displays the average write throughput.
Average Read IOPS
Displays the average read IOPS.
Average Write IOPS
Displays the average write IOPS.
Average Read Latency
Displays the average read latency.
Average Write Latency
Displays the average write latency.
The LUN I/O report answers these questions:
• How many megabytes have been written to and read from the selected LUN for the specified period?
• How many operations have been written to and read from the selected LUN for the specified period?
• What are the average read and write latencies for the selected LUN for the specified period?
• How many read hits and misses, in megabytes, were recorded for the selected LUN for the specified period?
• How many uncommitted bytes were recorded for the selected LUN for the specified period?
Mouse over a specific data point to see what the y values and exact time stamp were in relation to peaks.
The Riverbed system reports on performance for periods up to one month. Due to performance and disk space considerations, the display granularity decreases with time passed since the data was sampled.
For detailed information about data grouping, see
About data grouping.