HP P9000 Business Continuity Manager Reference Guide (T5253-96058, September 2011)

Table 56 Contents of the Copy Group Attributes Panel (continued)
When effectiveCopy typeDescriptionItem
CAASpecify the sidefile flow restriction
(required for TCA).
FLOW CTL
• When the YKMAKE
command is executed
• Y: Restricts the flow of host
update I/O on the S-VOL
• When the YKRESYNC
command is
executed.
7
depending on the usage amount
of the sidefiles. Deterioration of
the host’s I/O performance is
proportional to the usage
amount of the sidefiles.
• N: Do not restrict the flow of host
update I/O on the S-VOL. This
prevents host I/O performance
deterioration on crucial volumes.
If the usage amount exceeds the
criteria, the copy pair status
becomes SUSPCU
NOTE: If the C/T Group option
Inflow Control is not enabled in the
following models, FLOW CTL will be
disregarded even if set to Y:
• XP12000/XP10000 Disk Array
• XP24000/XP20000 Disk Array
For details, see the one of the
following documents:
• HP StorageWorks P9000
Continuous Access Synchronous
for Mainframe Systems User
Guide
• HP StorageWorks P9000
Continuous Access Synchronous
User Guide
• Hitachi TrueCopy for Mainframe
User Guide: HP XP24000 Disk
Array, HP XP20000 Disk Array
When the YKMAKE
command is executed
CAASpecify a unit to manage the
differential data between P-VOL
DIF UNIT
data and S-VOL data
(differential-data management unit).
• CYL: Manages by cylinder unit
• TRK: Manages by track unit
NOTE: If track (TRK) is specified
as the differential-data management
unit, there is a limit to the number
of copy pairs that can be created
in each storage system. For details,
see the HP StorageWorks P9000
Continuous Access Synchronous for
Mainframe Systems User Guide or
the HP StorageWorks P9000
Continuous Access Synchronous
User Guide.
When the YKSUSPND
command is executed
BCSpecify the number corresponding
to the ATTIME suspend function and
suspend mode you want to use
Preset Mode
82 ISPF Panels