Disk IO Report

The Disk IO Report shows read and write disk usage for each service in kB/s over time for the selected time period. This chart can answer questions such as, “Has my disk I/O usage suddenly increased or over time? If so, which subsystem is responsible for the increased disk I/O usage? If WAN memory acceleration, or CIFS acceleration, or edge cache performance is suffering, was there a decrease in its I/O load? Was that decreased I/O load due to another subsystem's increased I/O load? I swapped an appliance and loaded the same configuration and it seems slower. If all the I/O rates look lower, then maybe this is a disk issue."

The disk usage for each of the following services can be shown by selecting the desired service from the Service selector.

• System (sda) – Total disk usage for all services combined for the single disk; Note that there may be two disks.
• monitor – Disk usage required for storing the monitoring data
• swap – Disk usage required for swapping/paging
• virt – Disk usage required for ESP
• users – Disk usage required to store the username information (i.e. data sent by the AD connector, manually configured users and groups, details of dynamic network objects)
• wan – memory - Disk usage required for WAN memory acceleration techniques
• edge-cache – Disk usage required for storing cached content for Edge Cache
• cifs – Disk usage required for CIFS acceleration techniques

Where do I find this report?

Go to Monitor > System > Disk IO.

How do I interact with the interactive flash time graphs?

• To understand how to get a better look at traffic patterns and to remove clutter on the time graph, see Using Interactive Time Graphs.
• To understand how to set the desired time range for a chart, see Setting the Time Range.
• To understand how to print the report or schedule the report, see Printing and Scheduling Reports.