HP XP Continuous Access Software - Manual (Page 63)

Figure 17 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 17 (page 63) , the write operation to the XP
Continuous Access Journal primary data volume takes time. Especially, 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 for the copying process to the XP Business Copy
pair. In addition, note that if the journal volume size is small, the XP Continuous Access Journal
pair may be suspended by failure because of the limited capacity of its journal volume.
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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 18 (page 63) combines the configurations shown in Figure 16 (page 62) and
Figure 17 (page 63) . Within a single XP Continuous Access Journal pair, the primary and
secondary data volumes function as XP Business Copy P-VOLs, providing multiple copies at
the primary and remote sites.
Figure 18 Shared 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
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XP Continuous Access Journal/XP Business Copy configuration where an XP Business Copy
S-VOL in PSUS status is used as an XP Continuous Access Journal primary data volume
In Figure 19 (page 64) , the XP Business Copy S-VOL in PSUS status also functions as an XP
Continuous Access Journal primary data volume. This configuration allows XP Continuous
Access Journal to make a remote backup copy of the XP Business Copy S-VOL.
Combining XP Continuous Access Journal with other data management functions 63