December 2017
Beginner
598 pages
14h 7m
English
Content preview from Mastering VMware vSphere 6.5
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Storage I/O Control (SIOC)
SIOC was initially introduced in vSphere 4.1 to provide I/O prioritization and quality of service (QoS) of VM disks running on a cluster with a shared storage. It extended the shares and limits not at the host level, but at the cluster level. With vSphere 5.0, SIOC provides cluster-wide I/O shares and limits for NFS datastores, not only VMFS datastores.
With vSphere 5.1 a new SIOC feature called stats only mode is used to gather statistics to assist SDRS. Also, the latency threshold for SIOC has a new automatic threshold computation and the default latency threshold for SIOC (30 ms) can be reduced to as low as 5 ms.
With vSphere 6.5 there are two different SIOC:
- SIOC V1: It is disabled by default. It needs to be ...
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