Hp XP Continuous Access Software Manual de usuario descargar pdf (Pagina 22)

Figure 3 Connection conﬁguration for multiple secondary arrays

Local arrays

Continuous Access XP Journal operations involve local arrays at the primary and secondary sites. The

primary array consists of the main control unit (primary array) and SVP. The secondary array consists of

the remote control unit (secondary array) and SVP.

Operational parameters, or optional modes, are available for the local array to provide greater ﬂexibility

and allow you to tailor the local array to your unique operating requirements. At installation, the local

array modes are set to their default values, so discuss these settings with your HP team. Only your

HP account support representative can change the local array modes.

Main and remote control units (primary and secondary arrays)

The main control unit (primary array) and remote control unit (secondary array) control Continuous

Access XP Journal operations:

• The ma

in control unit is responsible for the primary data volume of the Continuous Access XP

Journal pairs and master journal volume. For Command View XP, the management station must

be LAN-attached to the primary array. The primary array communicates with the secondary array

thro

ugh dedicated remote copy connection paths. The primary array controls:

• Host I/O operations to the Continuous Access XP Journal primary data volume

• “Obtain journal” initial operations for the master journal volume

•Cont

inuous Access XP Journal initial copy operations

• Update copy operations between the primary and secondary data volumes

• The remote control unit controls the secondary data volume of the Continuous Access XP Journal

pai

rs and restore journal volume. The secondary array controls the copying journals and restoring

of j

ournals to the appropriate secondary data volumes. The secondary array assists in managing

e Continuous Access XP Journal pair status and conﬁguration (for example, rejects write I/Os to

Overview of Continuous Access XP Journal

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Hp XP Continuous Access Software Manual de usuario Pagina 22