Designing Disaster Recovery Clusters using Metroclusters and Continentalclusters, Reprinted October 2011 (5900-1881)

topology with two Continuous Access links. The sync
Continuous Access link, is between DC1 and DC2 and
the other link, the journaling Continuous Access link,
is between DC2 and DC3. There is no physical
Continuous Access link present between DC1 and DC3
but a phantom device group must be present between
DC1 and DC3.
2. multi-target-Bi-Link: When the package is configured
for 1:2 or multi target topology with two Continuous
Access links. One, the sync Continuous Access link, is
between DC1 and DC2 and the other, the journal
Continuous Access link, is between DC1 and DC3.
There is no physical Continuous Access link present
between DC2 and DC3 but a phantom device group
must be present between DC2 and DC3.
DC1_NODE_LIST Comma separated list of all node names that are in data
center one (DC1). The node list should begin and end with
quotation marks. For example, DC1_NODE_LIST=”node1,
node2”.
This parameter is not required to be set for a package
configured for two data centers.
DC2_NODE_LIST Comma separated list of all node names that are in data
center two (DC2). The node list should begin and end with
quotation marks. For example, DC2_NODE_LIST=”node3,
node4”.
This parameter is not required to be set for a package
configured for two data centers.
DC3_NODE_LIST Comma separated list of all node names that are in data
center three (DC3). The node list should begin and end with
quotation marks. For example, DC3_NODE_LIST=”node5,
node6”.
This parameter is not required to be set for a package
configured for two data centers.
DC1_DC2_DEVICE_GROUP The Raid Manager device group between DC1 and DC2
for this package. This device group is defined in the /etc/
horcm<#>.conf file.
This parameter is not required to be set for a package
configured for two data centers.
DC2_DC3_DEVICE_GROUP The Raid Manager device group between DC2 and DC3
for this package. This device group is defined in the /etc/
horcm<#>.conf file. This will be a phantom device group
if 3DC_TOPOLOGY=”multi-target-Bi-Link”.
This parameter is not required to be set for a package
configured for two data centers.
DC1_DC3_DEVICE_GROUP The Raid Manager device group between DC1 and DC3
for this package. This device group is defined in the /etc/
horcm<#>.conf file. This will be a phantom device group
if 3DC_TOPOLOGY=”multi-hop-Bi-Link”.
This parameter is not required to set for a package
configured for two data centers.
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Device Group Monitor Specific Variables Device Group
Monitor is currently available only with packages configured
480 Environment File Variables for Serviceguard Integration with Continuous Access P9000 or XP