HP XP Array Manager Software - Manual (Page 5)

1 Overview of HP StorageWorks XP Cache Residency
Manager
This chapter provides an overview of Cache Residency Manager functions and operations.
The Cache Residency Manager (shortened to Cache Residency hereafter where applicable) feature
of the storage system allows you to store frequently accessed data in a specific area of the storage
system’s cache memory. Cache Residency increases the data access speed for the cache-resident
data by enabling read and write I/Os to be performed at high speed.
Cache Residency operations are performed using the licensed storage system, HP StorageWorks
XP Remote Web Console software. The Remote Web Console software communicates directly with
the storage systems using a local-area network (LAN). The Remote Web Console software displays
detailed Cache Residency information and allows you to configure and perform Cache Residency
operations for the data stored on the storage system. For more information on performing Cache
residency operations using Remote Web Console, see the HP StorageWorks XP24000/XP20000
Remote Web Console User Guide.
Cache Residency can be used in conjunction with HP StorageWorks XP Virtual LVI/LUN to achieve
better performance improvements than when either of these options is used individually. If you
need to store an entire mainframe or open-system volume in Cache Residency cache, you can use
a small Virtual LVI/LUN volume to decrease the amount of cache required for the volume. For
further information on Virtual LVI/LUN, see the HP StorageWorks XP24000/XP20000 Virtual
LVI/LUN (VLL) and Volume Shredder User Guide.
Unless otherwise specified, the term storage system in this guide refers to the following disk arrays:
•
HP StorageWorks XP24000 Disk Array
•
HP StorageWorks XP20000 Disk Array
The GUI illustrations in this guide were created using a Windows computer with the Internet Explorer
browser. Actual windows may differ depending on the operating system and browser used. GUI
contents also vary with licensed program products, storage system models, and firmware versions.
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