Verifying the Activity Generated by a LUN

In order to understand the high activity of a filer, it is important to identify the LUNs generating the heaviest I/Os. The SAN administrator can then check with the system administrator whether the reported activity may be considered a normal behavior.

The Read Byte Rate and Write Byte Rate parameters of the LUN instances expose the data throughput for each LUN. Use these parameters to report on the total data traffic (per hour or per day) on each LUN in GB.

To make sure that traffic is displayed cumulatively per hour, select a time window of at least 12 hours in the graph window, select at least 7 days to visualize per day cumulative data.

1.	In the Status tab, click:

•	Cluster > Vserver > LUN (C-Mode)

•	Storage System > Aggregate > LUN (7-Mode)

to display the Read/Write Byte Rate parameters.

TREE_LUN_ByteRate

Selecting a NetApp Filer's LUNs Read/Write Byte Rate Parameter

2.	Click the History icon to automatically display a graph that shows the Read/Write Byte Rate values collected for a selected parameter during the previous six hours. You can customize the chart and table to show parameter history for different time periods.

GRAPH_LUN_ByteRate

Viewing a NetApp Filer's LUNs Read/Write Byte Rate as a graph