HP XP Continuous Access Software - Manual (Page 78)

Figure 24 Shared XP Continuous Access Journal Primary Data Volume and XP Business Copy
P-VOL
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XP Continuous Access Journal/XP Business Copy configurations that share the XP Continuous
Access Journal secondary data volume and XP Business Copy P-VOL
Figure 25 (page 78) shows an example of an XP Continuous Access Journal secondary data
volume that is also functioning as an XP Business Copy P-VOL. This configuration allows you
to use XP Business Copy to provide multiple backup copies of a single XP Continuous Access
Journal primary data volume.
Figure 25 Shared XP Continuous Access Journal Secondary Data Volume and XP Business
Copy P-VOL
Caution: When you share an XP Continuous Access Journal secondary data volume with an XP
Business Copy P-VOL as shown in
Figure 25 (page 78) , the write operation to the XP Continuous
Access Journal primary data volume takes time. In particular, when the XP Business Copy pair is
in PSUS(SP) status, the write operation to the XP Continuous Access Journal primary data volume
may take extra time because of the time for the copy process on the XP Business Copy pair.
Note that if the journal volume size is small, the XP Continuous Access Journal pair may be
suspended due to a failure because of the shortage of the capacity of its journal volume.
•
XP Continuous Access Journal/XP Business Copy configuration that shares the XP Continuous
Access Journal primary data volume and XP Business Copy P-VOL, and XP Continuous Access
Journal secondary data volume and XP Business Copy P-VOL
Figure 26 (page 79) combines the configurations shown in Figure 24 (page 78) and
Figure 25 (page 78) . Within a single XP Continuous Access Journal pair, the primary data
volume and secondary data volume are both functioning as XP Business Copy P-VOLs, providing
multiple copies at the primary and remote sites.
78 Preparing for XP Continuous Access Journal Operations