Viewing Reports : Viewing LUN I/O Reports
  
Viewing LUN I/O Reports
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 this table of statistics that summarize the activity.
Control
Description
Total Bytes Read
Specifies the total number of bytes read over the WAN.
Average Read Throughput
Specifies the average read throughput.
Total Bytes Written
Specifies the total number of bytes written over the WAN.
Average Write Throughput
Specifies the average write throughput.
Average Read IOPS
Specifies the average read IOPS.
Average Write IOPS
Specifies the average write IOPS.
Average Read Latency
Specifies the average read latency.
Average Write Latency
Specifies the average write latency.
What This Report Tells You
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?
About Report Graphs
Use the mouse to hover over a specific data point to see the y values and exact time stamp were in relation to peaks.
About Report Data
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 Data Grouping.
To view the LUN I/O report
1. Choose Reports > Branch Services: LUN I/O to display the LUN I/O page.
Figure: LUN I/O Report
2. Use the controls to customize the report as described in this table.
Control
Description
Time Interval
Select a report time interval of 1 hour (1h), 1 day (1d), 1 week (1w), 30 days (30d), yesterday, last week, or last month.
Time intervals that do not apply to a particular report are dimmed.
For a custom time interval, enter the start time and end time using the format YYYY/MM/DD HH:MM:SS.
Because the system aggregates data on the hour, request hourly time intervals. For example, setting a time interval to 08:30:00 to 09:30:00 from 2 days ago does not create a data display, whereas setting a time interval to 08:00:00 to 09:00:00 from 2 days ago will display data.
When you request a custom time interval to view data beyond the aggregated granularity, the data is not visible because the system is no longer storing the data. For example, the following custom time intervals do not return data because the system automatically aggregates data older than 7 days into 2-hour data points:
•  Setting a 1-hour time period that occurred 2 weeks ago.
•  Setting a 75-minute time period that occurred more than 1 week ago.
You can quickly see the newest data and see data points as they are added to the chart dynamically. To display the newest data, click Show newest data.
Lun Report
Select a LUN report (I/O, I/O Operations Per Sec, I/O Latency) from the drop-down list.
LUN
Select a LUN from the drop-down list.
Appliance
Select an appliance from the drop-down list.
Note: For detailed information about exporting statistics, see Exporting Statistics.