Hp XP Continuous Access Software Manual de usuario descargar pdf (Pagina 27)

creating XP Continuous Access Journal pairs for delta resync operations, see Requirements for

creating XP Continuous Access Journal pairs for delta resync operations.

For information about the delta resync operation that is performed when a failure occurs in the

configuration shown in Figure 7 (page 26), see Switching XP'sContinuous Accessmaster journal

group. The contingency XP Continuous Access Journal pair must be in HOLD status when the failure

occurs in order to perform a delta resync operation. However, the contingency XP Continuous

Access Journal pair status can be changed to HLDE, for example, when a cache memory or shared

memory error occurs at the DC2 XP Continuous Access Synchronous secondary site or when you

cannot obtain a journal at the XP Continuous Access Synchronous secondary site because the

master journal volume failed or a pinned track occurred. If the status of the contingency XP

Continuous Access Journal pair for a delta resync operation changes to HLDE due to one of the

conditions described above, follow the steps in Restoring a pair of data volumes and change the

pair status back to HOLD again.

Switching XP's Continuous Access master journal group

When a failure occurs on the DC1 primary site in Figure 7 (page 26) the DC2-to-DC3 XP Continuous

Access Journal pair can then use the contingency journal group in the XP Continuous Access

Synchronous secondary site as the new master journal group. To switch the master journal group,

first change the XP Continuous Access Synchronous secondary site to a primary site using XP's

RAID Manager horctakeover command, and then perform a delta resync operation on the

primary data volume of the contingency XP Continuous Access Journal pair that was in HOLD status

to activate data flow for that logical connection. Figure 8 (page 27) shows an example.

Figure 8 Delta resync activation in a 3DC multi-target configuration (after failure occurs)

In Figure 8 (page 27), because a failure occurs in primary site A (DC1), the horctakeover

command is used at DC2 to change the former XP Continuous Access Synchronous secondary site

(DC2) to be the primary site. If you perform a DC2-to-DC3 delta resync operation in this situation,

XP Continuous Access Journal delta resync operations 27

1 2 ... 22 23 24 25 26 27 28 29 30 31 32 ... 214 215

Sin comentarios

Hp XP Continuous Access Software Manual de usuario Pagina 27