Xp Continuous Access Journal Configuration; Xp Continuous Access P-Jnl And S-Jnl Groups - HP StorageWorks 4000/6000/8000 - Enterprise Virtual Arrays Reference Manual

Rule
nl
number
7 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.
8 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
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.
9 A P-vol can support a maximum of two remote copies (one Continuous Access Journal copy and
one Continuous Access Synchronous copy).
10 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.
Journal group
P-jnl
Consistency group
P-vol RCU
I
Primary site
Figure 114 XP Continuous Access Journal configuration
.
Journal
group
9GB
P-vol 6GB
Consistency
group ID
Figure 115 XP Continuous Access P-jnl and S-jnl groups
.
338 SAN extension
Description
I
RCU
Secondary site
6GB
S-vol
8GB
12GB
25322a
S-jnl
S-vol
25321a
Figure 116).