Fujitsu ETERNUS DX80 S2 Cli User's Manual page 439

Chapter 4 Function/System Settings and Display
4.2 Advanced Copy Management > set rec-buffer
-halt-wait-timer
-monitoring-time
-io-response-mode
-immed-halt-mode
■ Example(s)
The following example sets up partition #1:
CLI> set rec-buffer -partition 1 -buffer-type receive -remote-boxid "00DXL#########ET06F21AUAB-
CPJ000002######" -buffer-size 128mb -forwarding-interval 1 -halt-wait-timer 15 -monitoring-time 5
Optional. This parameter specifies the maximum no-response time for which host I/O
responses may be delayed in order to prioritize data transfers from the REC buffer when it is in
a high-load state. When this time is exceeded, communication with the host I/O reopens, but
the copy session is halted. This parameter must be specified for the initial setup. If omitted,
this parameter value cannot be changed.
0 Disabled
5 5 seconds
10 10 seconds
15 15 seconds (Recommended value)
Optional. This parameter specifies the monitoring time for high-load state REC buffers. The
possible range is from 0 to 15 seconds. Zero means the monitoring function is disabled. When
the REC buffer has large amounts of data to be stored and is in a high-load state, the time
required for I/O responses to the server is gradually incremented by the "-halt-wait-timer"
parameter value. Once the delay state has continued for longer than this parameter value, all
REC Asynchronous Consistency Mode sessions that are currently transferring data are halted to
allow priority processing of the server responses. This parameter must be specified for the
initial setup. If omitted, this parameter value is not changed.
0 Disabled
1 – 15 1 to 15 minutes (5 minutes is recommended).
Optional. Specifying "enable" for this parameter may improve the Write I/O response during
initial copying of an REC Consistency mode copy session. If heavy-load Write I/O continues, an
extended period of time may be required to achieve an equivalent state. To prevent this from
occurring, make sure that the Write I/O during an initial copy is well below the REC line
throughput.
enable The I/O response priority mode is enabled.
disable The I/O response priority mode is disabled.
Optional. Specifying "enable" for this parameter may improve the Write I/O response while an
REC Consistency mode copy session maintains an equivalent state. If the Write I/O response is
affected even slightly, the REC buffer is changed to HALT status and the copy order may not be
guaranteed for an extended period of time. This parameter is effective only when the HALT
wait timer is set to 0 seconds.
enable The Immediate Halt mode is enabled.
disable The Immediate Halt mode is disabled.
ETERNUS CLI User's Guide
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