Initiator and rcu target ports, Host failover software – HP XP Continuous Access Software User Manual
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The XP Continuous Access Journal remote copy configuration between the primary and secondary
arrays has the following requirements (see
):
•
XP Continuous Access Journal supports a 1-to-1 remote copy connection in one journal group
pair. In one journal group pair, one primary array can be connected to only one secondary
array. This configuration ensures the backup data consistency of two or more volumes (for
example, large databases) within the same array.
NOTE:
HP strongly recommends establishing at least two independent remote copy connections
from the primary array to the secondary array and vice versa to provide hardware redundancy
for this critical communications path.
Initiator and RCU target ports
Initiator and RCU target ports are required at the primary and secondary arrays. The initiator port
at the primary array is connected to the RCU target port at the secondary array through a Fibre
Channel interface. The initiator port at the secondary array is connected to the RCU target port at
the primary array. The initiator port at the secondary array issues a read journal command to the
primary array. In response to the read journal command, the RCU target port at the primary array
sends journal data to the secondary array.
You can configure any Fibre Channel interface port on the local array as an initiator port. Initiator
ports cannot communicate with host processor channels. Host channel paths must be connected
to a Fibre Channel interface port other than the initiator port.
NOTE:
Two or more initiator ports must be configured before you can add secondary arrays
and create XP Continuous Access Journal volume pairs.
You can connect Fibre Channel interface ports assigned as RCU target ports to host channel paths
through a Fibre Channel switch.
See
for more information about configuring host interface ports.
XP Continuous Access Journal and the XP Remote Web Console Software
The XP Remote Web Console software includes XP Continuous Access Journal software for the
local array. The XP Remote Web Console software communicates with each local array's SVP
through defined TCP/IP connections. For more information about XP Remote Web Console
operations, see the HP StorageWorks XP Remote Web Console user guide for
XP12000/XP10000/SVS200 or contact your HP account support representative.
For remote operations using the XP Remote Web Console software, the management station at the
primary site must be attached to the primary array. You should also attach an XP Remote Web
Console web client at the secondary site to all secondary arrays. You can then use the web client
to change the secondary array's XP Continuous Access Journal parameters and access the XP
Continuous Access Journal secondary data volume (for example, for media maintenance). To
simplify and expedite XP Continuous Access Journal operations in the reverse direction — from
the remote site to the primary site (for example, disaster recovery), you can use the XP Remote
Web Console web client installed at the secondary site.
NOTE:
If the XP Remote Web Console web client is not installed, contact your HP account support
representative for information about XP Continuous Access Journal configuration services.
Host failover software
Host failover software, which transfers information between host servers at the primary and remote
sites, is a critical component of any disaster recovery effort. Host failover is configured using the
desired host failover software product for the platform (for example, Microsoft Cluster Server or
HP Serviceguard), depending on your installation requirements and standards. The XP Command
Components
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