HP XP Continuous Access Software - Manual (Page 70)

Figure 16 Shared Continuous Access XP Journal secondary data volume and
Business Copy XP P-VOL
• Continuous Access XP Journal/Business Copy XP configurations that share the Continuous Access
XP Journal secondary data volume and Business Copy XP P-VOL
Figure 17 shows an example of a Continuous Access XP Journal secondary data volume that also
functions as a Business Copy XP P-VOL. You can use this configuration to use Business Copy XP to
provide multiple backup copies of a single Continuous Access XP Journal primary data volume.
Figure 17 Shared Continuous Access XP Journal secondary data volume and
Business Copy XP P-VOL
•
CAUTION:
When you share a Continuous Access XP Journal secondary data volume with a Business Copy XP
P-VOL as shown in Figure 17 , the write operation to the Continuous Access XP Journal primary data
volume takes time. Especially, when the Business Copy XP pair is in PSUS(SP) status, the write
operation to the Continuous Access XP Journal primary data volume may take extra time for the
copying process to the Business Copy XP pair. In addition, note that if the journal volume size is
small, the Continuous Access XP Journal pair may be suspended by failure because of the limited
capacity of its journal volume.
Continuous Access XP Journal/Business Copy XP configuration that shares the Continuous Access
XP Journal primary data volume and Business Copy XP P-VOL, and Continuous Access XP Journal
secondary data volume and Business Copy XP P-VOL
Figure 18 combines the configurations shown in Figure 16 and Figure 17 . Within a single Continuous
Access XP Journal pair, the primary and secondary data volumes function as Business Copy XP
P-VOLs, providing multiple copies at the primary and remote sites.
70 Continuous Access XP Journal operations requirements and restrictions