Database Reference
In-Depth Information
Figure 6.30
Storage controlled with SIOC.
In vSphere 5.5, Storage IO Control uses an injector that periodically tests the
performance capability of a given data store and can dynamically change the thresholds
it uses to determine data store congestion. If you prefer to use the traditional method of a
static latency threshold, you still can. The static latency threshold will be preferable if
your storage array is using sub-LUN auto-tiering, where blocks of data may be migrated
to different types of storage dynamically based on the performance profile requirements.
If you used the injector method to determine congestion in conjunction with an auto-
tiering array, there is a high probability the injector would get inaccurate data, because
sometimes it would hit high-performance blocks and sometimes it would hit low-
performance blocks.
Note
