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Benefits of Virtual
Provisioning
Virtual Provisioning
features
smooth out response times. It also reduces performance management
effort.
The benefits of Virtual Provisioning are:
Simplified storage management.
Nondisruptive application provisioning.
Offers significant cost efficiencies by reducing the amount of
allocated-but-unused storage.
Performance benefits from wide striping are most applicable to
random IO, and occur because data is striped across more
physical spindles than is often the case with standard
provisioning.
Virtual Provisioning contains the following features:
Support for Dynamic Cache Partitioning — Virtual provisioning
data devices may be associated with cache partitions.
Consumption monitoring — Users are able to monitor the
amount of space that is consumed by thin devices and thin pools
over time. This includes, for example, a "% full" view of thin
pools.
Add pool level storage and grow nondisruptively — The
customer will be able to add data devices to the pools to increase
capacity nondisruptively. Pools will have a used capacity
threshold that can be set and management software can get
notifications when threshold is met.
Configuring volume attributes — Thin devices are to be
configured in a similar manner as any other DMX device. The
TDEV would appear to hosts and applications as a standard
volume.
Thin devices will not have all the attributes of a regular device
(for example, RAID protection). The protection scheme is on the
data devices in the thin pool, not on the thin device.
Preallocation — Preallocation of a thin device will be optional
when the device is bound to a pool.
Performance and Optimization
Virtual Provisioning
147
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