Table 56 Contents of the Copy Group Attributes Panel (continued)
When effectiveCopy typeDescriptionItem
• When the YKMAKE
command is executed
• When the YKRESYNC
command is
executed.
7
CAASpecify the sidefile flow restriction
(required for TCA).
• Y: Restricts the flow of host
update I/O on the S-VOL
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
FLOW CTL
82 ISPF Panels
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