Monitoring Exinda Appliance Disk IO

The Disk IO report shows read and write disk usage for each service in kB/s over time for the selected time period.

This report answers 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 WANWide Area Network 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 physical disk issue.

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

• System (vda) – 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
• 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

The Disk IO graph displays IO used by edge cache.