HP XP P9500 Storage - Manual (Page 40)

Table 6 System option modes (continued)
Description Mode
OFF (default): Pair operations of Cnt Ac-S Z, Cnt Ac-J Z, or BC Z via an online command
device are available. SIM is output.
Notes:
1. When a command device is used online, if a script containing an operation via that
command device has been executed, the script may stop if this SOM is set to ON.
As described in the Business Continuity Manager User's Guide, the script must be
performed with the command device offline.
2. This SOM applies to Business Continuity Manager operations on MVS hosts.
Controls whether to prevent Read JNL or JNL Restore when the Write Pending rate on
RCU exceeds 60% as follows: 690
•
When CLPR of JNL-Volume exceeds 60%, Read JNL is prevented.
•
When CLPR of Data (secondary)-Volume exceeds 60%, JNL Restore is prevented.
MCU/RCU: This SOM applies to only the RCU.
Mode 690 ON: Read JNL or JNL Restore is prevented when the Write Pending rate on
RCU exceeds 60%.
Mode 690 OFF (default): Read JNL or JNL Restore is not prevented when the Write
Pending rate on RCU exceeds 60% (the same as before).
Notes:
1. This SOM can be set online.
2. If the Write Pending status long keeps 60% or more on RCU, it takes extra time for
the initial copy to be completed by making up for the prevented copy operation.
3. If the Write Pending status long keeps 60% or more on RCU, the pair status may
become Suspend due to the JNL-VOL being full.
4. If the Write Pending status long keeps 60% or more on RCU, the pair status may
become Suspend due to the JNL-Vol being full.
5. When XP12000 Disk Array/XP10000 Disk Array is used on P-VOL side, this SOM
cannot be used. If this SOM is set to ON, SSB=8E08 on P- VOL side and SSB=C8D1
on S-VOL side may frequently be output.
Used in an extended consistency group configuration. 762
Allows you to reflect P-VOL data to the S-VOL when BCM issues the Flush request to the
P-VOL and the pair receives the suspend command.
Mode 762 ON: When the pair receives the suspend command, the data up to the time
specified in the suspend command is reflected to the S-VOL.
Mode 762 OFF: The time stamp of the latest data received in each restore journal may
be different. In this case, the time stamps of data in restore journals are compared, and
data up to the oldest time stamp is reflected to the S-VOLs.
Changes CM capacity allocated to MPBs with different workloads. 908
Mode 908 ON: Difference in CM allocation capacity among MPBs with different
workloads is large.
Mode 908 OFF (default): Difference in CM allocation capacity among MPBs with
different workloads is small.
Notes:
1. Apply this SOM to CLPRs used only for Cnt Ac-J Z JNLGs.
2. Since CM capacity allocated to MPBs with low workload is small, the performance
is affected by a sudden increase in workload.
3. This SOM is effective for a CLPR. Therefore, when setting this SOM to ON/OFF,
select target "LPRXX (XX=00 to 31)". For example, even when CLPR0 is defined
(CLPR1 to 31 are not defined), select "LPR00" first and then set the SOM to ON/OFF.
40 Planning volumes, P9500 systems