Hitachi Virtual Storage Platform, Руководство пользователя и справочник

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Introduction
1–13
Hitachi VSP User and Reference Guide
Table 1-4 Virtualization features and functions
Table 1-5 Performance Management features and functions
Table 1-6 Provisioning Features and functions for open systems
Feature Description
Hitachi Virtual Partition
Manager Provides logical partitioning of the cache which allows you to divide the
cache into multiple virtual cache memories to reduce I/O contention.
Hitachi Cache Residency
Manager Supports the virtualization of external storage systems. Users can
connect other storage systems to the Virtual Storage Platform storage
system and access the data on the external storage system via virtual
devices created on the Virtual Storage Platform storage system.
Functions such as TrueCopy and Cache Residency can be performed on
external data through the virtual devices.
Feature Description
Hitachi Cache Residency
Manager Cache Residency Manager locks and unlocks data into the cache to optimize
access to the most frequently used data. It makes data from specific logical
units resident in a cache, making all data accesses become cache hits. When
the function is applied to a logic unit, frequently accessed, throughput
increases because all reads become cache hits.
Hitachi Performance
Monitor Performs detailed monitoring of the storage system and volume activity. This
is a short tem function and does not provide historical data
Hitachi Compatible PAV Enables the mainframe host to issue multiple I/O requests in parallel to the
same LDEV/UCB/device address in the VSP. Compatible PAV provides
compatibility with the IBM Workload Manager (WLM) host software function
and supports both static and dynamic PAV functionality.
Flash Acceleration Flash acceleration increases the performance of SSD and HDD drives by
altering the IO and executing directly to the disks. Typically, the IO execution
involves interaction between BED (back-end director) and VSP’s cores.
Therefore, it releases the busy processing cycles and allows them to perform
a larger number of IO operations. This also increases the cache management
functions to improve the cache pending writes (CWP)
Feature Description
Dynamic Tiering Provides automated support for a multi-tiered Dynamic Provisioning pool.
The most accessed data within the pool is dynamically relocated onto the
faster tiers in the pool. Data that is most referenced has improved
performance due to the inclusion of fast storage such as SSD while
controlling the overall storage cost by incorporating lower costing storage
such as SATA.
Hitachi LUN Manager The LUN Manager feature configures the fibre-channel ports and devices
(logical units) for operational environments (for example, arbitrated-loop
and fabric topologies, host failover support).
Hitachi LUN Expansion The LUN Expansion feature expands the size of a logical unit (volume) to
which an open-system host computer accesses by combining multiple logical
units (volumes) internally.
Hitachi Dynamic
Provisioning software The Dynamic Provisioning feature virtualizes some or all of the system’s
physical storage. This simplifies administration and addition of storage,
eliminates application service interruptions, and reduces costs. It also
improves the capacity and efficiency of disk drives by assigning physical
capacity on demand at the time of the write command receipt without
assigning the physical capacity to logical units.