Storage counters at the datastore level
vCenter only provides the following screen for datastores. It is a fixed set of charts, with fixed configuration.
The complete list of charts available in vCenter is listed as follows:
- Storage I/O Control Normalized Latency
- Storage I/O Control Normalized Aggregate IOPS
- Average Device Latency per host (Top 10)
- Maximum Queue Depth per host (Top 10)
- Read IOPS per host (Top 10)
- Write IOPS per host (Top 10)
- Average Read Latency per VM vDisk (Top 10)
- Average Write Latency per VM vDisk (Top 10)
- Read IOPS per VM vDisk (Top 10)
- Write IOPS per VM vDisk (Top 10)
As you can see, the list is rather limited. For example, there are no counters for throughput, be it read, write, or total. Most charts only show the top 10 data points.
vRealize Operations provides a richer set of data for storage at the datastore level, including IOPS, throughput, latency, and outstanding I/O. For most of them, you get the data for read, write, and total.
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