Description
Rule
nl
number
HP recommends that the P-jnls and S-jnls in a journal group be the same size and have the same
number and type of LDEVs.
7
An XP 3DC configuration requires minimum firmware versions for XP24000/20000 and
XP12000/10000:
• Two topologies are supported; cascaded (1:1:1) and multi-target (1:2) (see Figure 116).
• Delta resync is supported with XP12000/10000, but is not supported with XP24000/20000.
XP12000/10000 firmware earlier than 50.08.05.00/00 did not support creating Business Copy
from the devices used for both Synchronous and Journal replication in a 3DC configuration.
Firmware version 50.08.05.00/00 (or later) allows creation of Business Copy from these devices,
but does not allow a fast-restore operation for a Business Copy device.
8
A P-vol can support a maximum of two remote copies (one Continuous Access Journal copy and
one Continuous Access Synchronous copy).
9
Requires a minimum guaranteed network bandwidth link that matches the average host writes of
all MCU journals being serviced.
Journal capacity must be capable of buffering data until off-peak times.
• For 256 Mb/s or higher, set the line speed to 256.
• For 100 to 256 Mb/s, set the line speed to 100.
• For 10 to 100 Mb/s, set the line speed to 10.
Note: A minimum of 16Mb/s of IP bandwidth per path is required.
10
P-vol
P-jnl
25321a
Primary site Secondary site
RCU
I
RCU
I
Journal group
Consistency group
S-vol
S-jnl
Figure 114 XP Continuous Access Journal configuration
.
Consistency
group ID
Journal
group
25322a
P-vol S-vol
8GB
12GB
6GB
9GB
6GB
Figure 115 XP Continuous Access P-jnl and S-jnl groups
.
SAN extension338
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