Monitoring the NexentaStor

eG Enterprise offers a specialized monitoring model for the NexentaStor appliance.

Figure 1 : The layer model of the NexentaStor

Each layer of this model is mapped to tests that report on the overall health, I/O performance, and resource usage of the NexentaStor appliance. Using the metrics so reported, the following performance queries can be easily answered: 

• Is any volume processing I/O requests very slowly?
• Is any volume running out of space?
• Which volume is currently in a faulty/degraded state?
• Is the storage appliance using memory excessively?
• Is the appliance overloaded with users sessions?

The Operating System, Network, TCPand Application Processes layers of a NexentaStor model are similar to that of a Windows Generic server model. Since these tests have been dealt with in the Monitoring Unix and Windows Servers document, the upcoming section focuses on the Nexenta Volumes layer.