VMware vSphere 4.1 Storage I/O Control (SIOC)

Eric Sloof, van NTPro.nl, heeft onlangs een interessant artikel geplaatst met betrekking tot storage I/O control, ook wel SIOC genoemd. Het complete artikel is te vinden op de site van Eric Sloof, NTPro.nl, te vinden. Hieronder een korte samenvatting, geleend van de site:

Storage I/O Control (SIOC) provides storage I/O performance isolation
for virtual machines, thus enabling VMware® vSphere (“vSphere”)
administrators to comfortably run important workloads in a highly
consolidated virtualized storage environment. It protects all virtual
machines from undue negative performance impact due to misbehaving
I/O-heavy virtual machines, often known as the “noisy neighbour”

problem. Furthermore, the service level of critical virtual machines can
be protected by SIOC by giving them preferential I/O resource
allocation during periods of congestion. SIOC achieves these benefits by
extending the constructs of shares and limits, used extensively for CPU
and memory, to manage the allocation of storage I/O resources. SIOC
improves upon the previous host-level I/O scheduler by detecting and
responding to congestion occurring at the array, and enforcing
share-based allocation of I/O resources across all virtual machines and
hosts accessing a datastore. With SIOC, vSphere administrators can
mitigate the performance loss of critical workloads due to high
congestion and storage latency during peak load periods. The use of SIOC
will produce better and more predictable performance behavior for
workloads during periods of congestion.

Zie voor meer informatie de site NTPro.nl.