.Part 4 SAN Extension and Bridging HP SAN Design Reference Guide 785354-001

Table 156 HP P9000 (XP) Continuous Access Synchronous replication rules (continued)
Description
Rule
number
dark fiber, or less than 5 ms using other extension methods. Distances greater than 200 km or latencies
greater than 5 ms require HP approval before implementation. Contact HP product support if using greater
distances or latencies.
Note: You must ensure that host-based applications utilizing replicated storage are able to tolerate the
total of the following latencies:
• Local I/O servicing (local site storage system)
• Continuous Access Synchronous replication
• Remote I/O servicing (remote site storage system)
A minimum of 16 Mb/s of IP bandwidth per path is required.2
HP P9000 (XP) Continuous Access Asynchronous
Table 157 (page 306) describes the network requirements and configuration rules when using HP
P9000 (XP) Continuous Access Asynchronous replication.
Table 157 HP P9000 (XP) Continuous Access Asynchronous replication rules
Description
Rule
number
Asynchronous replication is supported on XP24000/20000 and XP12000/10000 storage systems. The
maximum latency supported for Asynchronous replication is 300 ms one-way or 600 ms round-trip.
Note: P9500 storage systems do not support Continuous Access Asynchronous replication.
1
A minimum of 16 Mb/s of IP bandwidth per path is required.2
HP P9000 (XP) Continuous Access Journal
Table 158 (page 306) describes the network requirements and configuration rules when using HP
P9000 (XP) Continuous Access Journal replication.
Table 158 HP P9000 (XP) Continuous Access Journal replication rules
Description
Rule
number
Journal replication is supported on and P9500 with V01, XP24000/20000 and XP12000/XP10000
storage systems only. The maximum distance supported is 300 ms one-way or 600 ms round-trip.
1
Initiator port and RCU-target port configurations and a control-unit-free definition are required on both
storage systems. See Figure 121 (page 307).
2
Open-V emulation is supported for data volumes (P-vol and S-vol) and journal pools only.3
Journal replication does not support LUSE devices for P-vol, S-vol, or journal pools for firmware versions
earlier than 50.09.07.00/00.
4
P-vol and S-vol must have the same size Open-V volumes.5
P-jnls and S-jnls must have at least 1 LDEV and can have up to 16 Open-V LDEVs. See Figure 122 (page
307).
6
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 123 (page 307).
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
8
306 SAN extension