Modifying parameters, Deleting consistency groups, Modifying parameters deleting consistency groups – HP StorageWorks XP Remote Web Console Software User Manual
Page 88
NOTE:
Specify a value not exceeding the I/O Delay Increase for the I/O Delay Start. Specify
a value not exceeding the Pending Update Data Rate for the I/O Delay Increase. If sidefile
threshold is set between 0 to 30%, influence to the I/O delay is kept low.
HP recommends that you change the I/O Delay Start and I/O Delay Increase when all XP
Continuous Access asynchronous pairs are suspended, or host I/O and sidefiles do not exist. If
you do not want to control inflow into a sidefile, specify the value same as the Pending Update
Data Rate for the I/O Delay Start and I/O Delay Increase, and specify 0 second for the Offloading
Timer.
1.
From the Consistency Group list, right-click, and click Async Option. The Async Option pane
appears (see
).
NOTE:
You do not have to select a consistency group on the list.
2.
In the Async Option pane, select parameters.
3.
Click Set to set parameters. The list changes to the Asynchronous Option Settings Parameter
list.
NOTE:
After being set, options can be modified and canceled (see
and deleting consistency groups” (page 88)
).
4.
Click Apply on the XP Continuous Access main pane to apply option settings to the disk array.
When the Async Option pane closes, the list changes to the Asynchronous Option Settings Parameter
list.
Figure 48 Asynchronous Option Settings Parameter list
•
Pending Rate: Sidefile allocation in %. Indicates sidefile threshold, which is maximum amount
of cache used for storing XP Continuous Access asynchronous recordsets (sidefiles).
•
Offloading: Offloading timer in seconds. Indicates that the MCU waits to send an XP Continuous
Access Async recordset to the RCU.
•
Delay Start: Maximum amount of cache for starting inflow control for the asynchronous copy.
•
Delay Increase: Maximum amount of cache for starting to strengthen control over inflow for
the asynchronous copy.
Modifying parameters and deleting consistency groups
After the Consistency Group (CT Group) and Asynchronous Option operations, parameters can
be modified individually, and consistency groups set by the operation can be deleted.
Modifying parameters
1.
After performing the CT Group operation, click a consistency group on the list. To modify
parameters for Async Option operation, you do not have to select the row on the list.
2.
Right-click, and click Modify. A pane for each operation appears.
3.
Modify parameters, and click Set.
4.
Click Apply on the XP Continuous Access main pane to apply modifications to the disk array.
Deleting consistency groups
1.
Click the consistency groups on the list.
88
Performing XP Continuous Access configuration operations