Hp XP Continuous Access Software Instrukcja Użytkownika Pobierz pdf (Strona 77)

3. Wait until the Continuous Access XP Synchronous S-VOL in the intermediate site is suspended (in

SSWS status) or changed to a Continuous Access XP Synchronous P-VOL.

After the S-VOL is suspended or changed to a P-VOL, you can use the volume to resume your

business tasks.

For more information about using RAID Manager XP, see the HP StorageWorks RAID Manager XP

user guide.

When a disaster or failure occurs, this procedure enables you to resume your business tasks using

the Continuous Access XP Synchronous volume at the intermediate site. The Continuous Access XP

Synchronous volume at the intermediate site contains the same data that is stored in the Continuous

Access XP Synchronous P-VOL at the primary site.

For more information, see Continuous Access XP Journal data volume pair status.

Combining CA XP Journal with CA XP Synchronous (3DC multi-target

conﬁguration)

The local array can combine Continuous Access XP Journal and Continuous Access XP Synchronous. In

asystemwhe

re Continuous Access XP Journal and Continuous Access XP Synchronous are combined,

there are one primary and two secondary sites. One secondary site is for synchronous remote copy, and

is usually located a short distance from the primary site. The other secondary site is for asynchronous

remote copy

, and is usually located a long distance from the primary site. This system conﬁguration is

called a th

ree data center (3DC) multi-target conﬁguration.

A3DCmulti

-target conﬁ guration provides a solution for disaster recovery and business continuity. Even

when a disa

ster or failure occurs at two sites at the same time, you can restart your business tasks using

data in the remaining secondary site.

Figure 31 illustrates a 3DC multi-target conﬁguration where Continuous Access XP Journal and Continuous

Access XP Synchronous are combined. This conﬁguration consists of the following sites:

• Primary site for Continuous Access XP Synchronous and Continuous Access XP Journal (DC1 -

data cen

ter 1)

• Secondary site for Continuous Access XP Synchronous (DC2- data center 2)

• Secondary site for Continuous Access XP Journal (DC3- data center 3)

Figure 31 3DC multi-target conﬁg. (combining CA XP Jour. with CA XP Sync.)

In this conﬁguration, the primary volume at the primary site is paired with the secondary volume for

Continuous Access XP Synchronous. This primary volume is also paired with the secondary volume for

Continuous Access XP Journal. If a host at the primary site writes data to the primary volume, the data

is written to the Continuous Access XP Synchronous secondary volume in real time, synchronously with

regards to writing from the host. The data is also written to the Continuous Access XP Journal secondary

Continuous Access XP Journal user guide

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