#dev_group

ip_address

service

 

 

 

 

 

dg23

NodeB.dc2.net

horcm0

#

communicate

with

DC2

nodes

dg13

NodeA.dc1.net

horcm0

#

communicate

with

DC1

nodes

11.Restart the Raid Manager instance so that the new information in the configuration file is read:

#horcmshutdown.sh <instance-#>

#horcmstart.sh <instance-#>

12.Repeat steps 1 through 12 on each host that runs this particular application package.

If a host runs more than one application package, you must incorporate device group and host information for each of these packages.

NOTE: The Raid Manager configuration file must be different for each host, especially for the HORCM_MON and HORCM_INST fields.

Creating Device Group Pairs

After configuring the Raid Manager configuration files on all nodes in the primary and recovery cluster, you must create Continuous Access device group pairs. An application configured for a 3DC DR Solution may contain either three or two device group pairs based on Tri-Link or Bi-Link configuration respectively.

An application configured for a 3DC DR Solution with Tri-Link configuration contains three device group pairs; One Continuous Access Sync or Journal device group pair between DC1 and DC2, Continuous Access-Journal device group pair, and a Delta Resync device group pair.

An application configured for Three Data Center solution with Bi-Link configuration contains two device group pair; Continuous Access Sync or Journal device group pair between DC1 and DC2 and Continuous Access-Journal device group pair to DC3. All the device group pair relations must be established prior to the rest of the configurations and normal package operations.

Creating Device Group Pairs for Tri-Link configuration

For a 3DC Tri-Link configuration, a Delta Resync pair can be created either between DC2 and DC3 or DC1 and DC3. The steps to create the device group pairs differ based on where the Delta Resync pair needs to be configured. For configuring Delta Resync pair between DC2 and DC3, first create Continuous Access sync or Journal pair between DC1 and DC2 and then Continuous Access Journal between DC1 and DC3. Then, create a Delta Resync pair between DC2 and DC3 after creating of the Continuous Access Journal pairs.

To create pairs with Delta Resync pair between DC2 and DC3, use the following:

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 the Continuous Access Journal device group between DC1 and DC3.

a.Create the Continuous Access Journal pair dg13 from any node in DC1:

#paircreate –g dg13 –f async –vl –c 15 –jp <Journal_id> –js <Journal_id>

b.Wait for the PAIR state to come up for the dg13 Journal device group:

Configuring an P9000 or XP 3DC DR Solution 437