HP XP P9500 Storage - Manual (Page 94)

Journal and mirror maintenance
Maintaining journals and mirror consists of the following operations:
•
Changing options used by journal
•
“Changing options used by mirrors ” (page 96)
•
“Deleting journal volumes from a journal ” (page 98)
•
“Deleting journals ” (page 99)
Changing options used by journals
Most Continuous Access Journal Z pair operations are performed on multiple pairs. This is done
using journals. You can change the following options that affect the pairs in journals:
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Inflow Control—allows you to restrict the inflow of data to allow other journals with higher
priority data unrestricted inflow
•
Data Overflow Watch—establishes a timeout period
•
Use of Cache—allows you to store journal data in the cache on the secondary system
•
Timer Type—establishes the type of clock used for consistency time.
Prerequisite information
Please be aware of the following when changing journal options:
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Journal options must be changed on both systems, primary and secondary.
•
To change journal options, one of the following conditions must be satisfied:
- The attribute of the journal is Initial.
- The status of the journal in the mirror is one of the following:
◦ Initial
◦ Stopped
◦ Hold(Failure)
When one journal uses multiple mirrors, whether you can select Change Journal Option
depends on the status of the journal whose mirror is not in Hold, Holding or Hold(Failure)
status. For example, if mirrors in the journal are in the Hold and Active status, you can not
change the journal option. If mirrors in the journal are in the Hold and Stopped status, you
can change the journal option.
Also, both conditions must be satisfied in the following configurations:
◦ 3 Cnt Ac-J Z DC multi-target at the local site journal
◦ 3 Cnt Ac-J Z DC cascade at the intermediate site journal
•
When changing options for multiple journals, you can leave some options unchanged by
entering or selecting no value. If you specify a value, it is applied to the selected journals.
•
On the 3 Cnt Ac-J Z DC cascade configuration intermediate site, only Timer Type can be
changed. Inflow Control, Data Overflow Watch, and Use of Cache of the intermediate site
journal cannot be changed at this site.
Procedure 22 To change options for a journal
1. In the Remote Web Console main window, select Actions > Remote Copy > Continuous Access
Journal Z > Journal Operation. The Journal Operation window displays.
2. Click to change the mode from View to Modify.
94 Maintaining the system