Storage can limit the performance of enterprise workloads. It is one of the most common bottlenecks in performance. You should know how to design a storage system, monitor a host's storage throughput, and troubleshoot problems that result in overloaded storage and slow storage performance.
There are many catalysts that affect storage performance. These are:
- Improper configuration of a storage device
- Storage protocols
- Queuing and LUN queue depth
- Load balancing across available storage
- VMFS configuration:
- Characteristics of VMFS and RDMs
- SCSI reservations
- Virtual disk types
- Placing more I/O demand than the storage is architected to deliver