Building Disaster Recovery Serviceguard Solutions Using Metrocluster with Continuous Access for P9000 and XP A.11.00

NOTE: HP Storage XP 3DC Sync/CAJ with Delta Resync replication does not allow the creation
of Delta Resync pair when data is being replicated in Multi-Hop topology.
To create pairs with Delta Resync pair between DC1 and DC3, and when using 3DC Sync/CAJ
replication:
1. Create the Continuous Access Synchronous device group between DC1 and DC2.
a. Create the Continuous Access Synchronous pair dg12 from any node in DC1:
# paircreate –g dg12 –f <data or never> –vl –c 15
b. Wait for the PAIR state to come up for the dg12 device group:
# pairevtwait -g dg12 -t 300 -s pair
2. Create the Continuous Access Journal device group between DC2 and DC3.
a. Create the Continuous Access Journal pair dg23 from any node in DC2:
# paircreate –g dg23 –f async –vl –c 15 –jp <Journal_id> -js
<Journal_id>
b. d. Wait for the PAIR state to come up for the dg23 Journal device group:
# pairevtwait -g dg23 -t 300 -s pair
3. Before creating a Delta Resync pair between DC1 and DC3, issue horctakeover on
DG12 pair at DC2 so that the data starts replicating in Multi-Target topology from DC2:
# horctakeover –g dg12
4. Create a Delta Resync pair between DC1 and DC3 from any node in DC1:
# paircreate –g dg13 –f async –nocsus –vl –c 15 –jp <Journal_id>
-js <Journal_id>
5. Once the Delta Resync pair is created, issue the horctakeover command at DC1 so
that the data source is at DC1. This suspends dg23 device group pair. Resync the dg23 device
group using pairesync command:
# horctakeover –g dg12
# pairresync –g dg23
Creating Device Group Pairs for Multi-Hop Bi-Link configuration
For a Multi-Hop-Bi-Link configuration, first create the Continuous Access Sync or Continuous
Access Journal pair between DC1 and DC2. Create the Continuous Access Journal
pair dg23 after creating the pair between DC1 and DC2:
1. Create the Continuous Access sync or Journal device group between DC1 and DC2.
a. When using 3DC Sync/CAJ replication, create the Continuous Access Synchronous
device group pair dg12 from any node in DC1:
# paircreate –g dg12 –f <data or never> –vl –c 15
or
When using 3DC CAJ/CAJ replication, create the Continuous Access Journal
device group pair dg12 from any node in DC1:
# paircreate –g dg12 –f async –vl –c 15 –jp <Journal_id> -js
<Journal_id>
b. Wait for the PAIR state to come up for the dg12 device group.
# pairevtwait -g dg12 -t 300 -s pair
2. Create Continuous Access Journal device group pair dg23 between DC2 and DC3
from any DC2 node:
— paircreate -g dg23 -vl -f async -c 15 -jp <Journal_id> -js
<Journal_id>
Configuring an application 117