SAN challenge lies not in implementing a SAN, but in understanding the
performance requirements to tune a SAN for maximum benefit to the
enterprise. If a SAN is not properly tuned, access to storage can
become slow, inefficient, and costly. SAN tuning via the implementation
of a SANaccelerator delivers a powerful way to provide maximum benefit
with minimal time and cost outlays.
The first step to tuning a SAN is obtaining information on specific
facets of SAN performance such as device throughput rates, daily
throughput, and average block or record size. Good SAN management
software should provide this information.
Since the SAN infrastructure shares common components (switches,
directors and storage resources), ensuring that high priority data
requests get immediate response and are not queued behind pending
low-priority data requests is critical. Architecting a hierarchical
storage model into the SAN using SANaccelerators, RAID Arrays, JBOD,
and Tape drives can ensure consistent data accessibility and meeting
Quality of Service (QOS) objectives.
SANaccelerators that use solid state technology are playing an
increasingly important role in tuning the performance of SANs. Flexibly
apportioned to different SAN needs, SANaccelerators can be managed with
standard tools to allow the performance benefits to be effectively
directed to areas of the SAN where performance acceleration is needed.
SANaccelerators complement other storage resources in the SAN by
ensuring that frequently accessed data is positioned on the fastest
media available when it is needed, where it is needed.