Viewing Reports : Viewing SnapMirror Reports
  
Viewing SnapMirror Reports
The SnapMirror report displays how much benefit SnapMirror optimization is providing for a given filer (or all filers) and traffic type in the time period specified. You can use this report to view optimization outcomes for not just a filer, but also all volumes for a single filer, or a single filer for a single volume or qtree. You can drill down to specific optimization statistics for a volume or a qtree.
SnapMirror captures and reports only traffic flowing in the LAN-to-WAN direction.
For details about operating report controls, see Overview.
The SnapMirror report contains this information:
Field
Description
Peak LAN/WAN Throughput
Displays the peak LAN/WAN data activity. The system stores peak statistics in terms of bytes transferred over the LAN, but calculates the normal throughput using a granularity of 10 seconds.
Average LAN/WAN Throughput
Displays the average LAN/WAN data activity. The system stores nonpeak statistics as the number of bytes transferred over the LAN/WAN, and calculates the throughput by converting bytes to bits and then dividing the result by the granularity.
For instance, if the system reports 100 bytes for a data point with a 10-second granularity, RiOS calculates:
100 bytes * 8 bits/byte / 10 seconds = 80 bps
This means that 80 bps was the average throughput over that 10-second period.
The total throughput shows the data amount transferred during the displayed time interval.
Data Reduction
Specifies the percentage of total decrease in overall data transmitted (when viewing all SnapMirror filers). The system calculates data reduction as (total LAN data - total WAN data) / total LAN data.
What This Report Tells You
The SnapMirror report answers this question:
•  How much total SnapMirror traffic is the appliance processing over time?
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 for periods up to one month. Due to performance and disk space considerations, data representation in reports for periods longer than the latest five minutes are interpolated between data points obtained by aggregating multiple 10-second samples. The display granularity decreases with time passed since data was sampled.
For detailed information about data grouping, see Data Grouping.
To view the SnapMirror report
1. Choose Reports > Optimization: SnapMirror to display the SnapMirror page.
Figure: SnapMirror 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.
Filer (Volume)
Select a filer from the drop-down list to view detailed statistics on that filer or select all to view statistics on all filers. You can use data reduction information to fine-tune the optimization settings for that filer. The SteelHead automatically identifies and summarizes information by filer based on the SnapMirror traffic seen by the appliance.
Peak lines appear after one hour for filer detail reports.
When viewing all volumes for a single filer, the report stacks the throughput series because the sum (total throughput of all volumes) is meaningful. When there are more volumes than colors, the report reuses the colors, starting again from the beginning of the list.
Traffic Type
Select either LAN or WAN to display the amount of data transmitted over the LAN/WAN during the selected time period.
Appliance
Select an appliance from the drop-down list.
Note: For detailed information about exporting statistics, see Exporting Statistics.