HP XP Array Manager Software - Manual (Page 246)

3. If the C/T delta threshold for a copy group is exceeded, you can perform an analysis:
• In advanced mode, you can perform the analysis yourself by viewing a series of graphs to
determine the root cause of the problem. See “ Analyzing Continuous Access Journal perform-
ance in advanced mode ” on page 248 for more information.
• In wizard mode, you are guided through a selection of key metrics and presented with a
summary of possible causes and solutions. See “ Analyzing Continuous Access Journal per-
formance in wizard mode ” on page 247 for more information.
CAUTION:
The following operations will cause previous C/T delta values and JNLG usage rates not to
be displayed:
• Deleting copy pair configuration definition files
• Making changes to the pair management server that manages a target copy group, in-
cluding changing the WWN
NOTE:
You cannot access previous C/T delta values during a takeover operation (disaster recovery)
because the relationship between the primary and secondary volumes is temporarily reversed.
When the copy group relationship is restored (takeback), the data can be accessed again.
For more information about disaster recovery operations, see the
HP XP7 Command View
Advanced Edition Replication Manager User Guide.
Configuring network bandwidth for analysis
The Cnt Ac-J Performance Analysis function gives you the option of supplying values for the effective
network bandwidth.
The effective network bandwidth is the actual speed at which data can be transmitted on a remote
path based on your replication environment. Check your network and supply a proper bandwidth
value for each path group.
TIP:
•
In addition to the main Cnt Ac-J Performance Analysis screen, this option is also available during
analysis (wizard and advanced mode).
• Setting the bandwidth is not required. If values are not set, a warning is displayed that can be
ignored.
1. On the Replication tab, in General Tasks, select Configure Bandwidth for Analysis.
2. Supply one value for all remote path groups or select each individually.
Monitoring managed resources and resolving alerts 246