HP XP Racks - Manual (Page 26)

How to preserve consistency
To define a copy group as a consistency group, a consistency group ID can be specified when
the copy group is defined.
Table 1 (page 26) lists the methods for preserving consistency for each consistency group copy
type.
Table 1 Methods for preserving consistency for each copy type
Consistency preservation method Consistency group ID
specification method
Consistency group ID specified Copy type
The NORMAL ATTIME Suspend
function or the Cnt Ac-J Z ATTIME Consistency group IDs are
specified in the Copy Group Optional Business Copy Z
Suspend function can be used to Attributes panel in which the
preserve the consistency of copy
groups. copy group attributes are
defined for the consistency
group ID already registered in
the storage system by Remote
Web Console.
The Cnt-Ac S Z consistency
preservation function in Business When working with Cnt-Ac S
Z, you don't need to register Optional Continuous
Access
Synchronous Z
Continuity Manager can be used the consistency group ID in the
to preserve consistency. For storage system. Consistency
details about how to implement group IDs are specified in the
this, see “The Continuous Access Copy Group Attributes panel
Synchronous Consistency
preservation function” (page 94)
.
in which the copy group
attributes are defined for the
When the Open/MF Consistency
Preservation Function is used,
consistency group ID for Cnt-Ac
S Z.
consistency is only preserved for
the Cnt-Ac S Z copy group in the
storage system that contains the
combined consistency group. For
details on the Open/MF
Consistency Preservation
Function, see
“Open/MF
consistency groups” (page 28) .
Consistency is preserved by using
only the TrueCopy Asynchronous Consistency group IDs are
specified in the Copy Group Yes TrueCopy
Asynchronous for
Mainframe
for Mainframe functions of the Attributes panel in which the
storage system. If the ATTIME copy group attributes are
suspend function is used, defined for the consistency
TrueCopy Asynchronous for group ID already registered in
Mainframe copy groups that are the storage system by Remote
Web Console.
configured across multiple
storage systems can be
suspended at the same time.
Consistency is preserved by using
only the Cnt Ac-J Z functions of The journal group number
already registered in the Yes Non-4x4
configurations Continuous
Access Journal Z
the storage system. If the Cnt Ac-J storage system by the Remote
Z ATTIME suspend function is Web Console is specified as
used for BC Z copy groups that the consistency group ID. In
link with Cnt Ac-J Z copy groups, Business Continuity Manager,
BC Z copy groups that are the journal group number for
configured across multiple the primary site is used as the
storage systems can be
suspended at the same time. consistency group ID, and the
journal group number for the
secondary site is used as the
sub consistency group ID. The
consistency group ID and sub
consistency group ID are
specified in the Copy Group
Attributes panel in which the
26 Overview of HP XP7 for Business Continuity Manager