HP StorageWorks XP Remote Web Console Software - Manual (Page 128)

4. In the Change JNL Option window ( “Change JNL Option Window” (page 128) ), select Set.
CAUTION: If the status of the journal group is Active, or if the status of the master journal
group is Hold, you can change only the Line of Speed option.
If two or more journal groups were selected in step 3 , and want to make some options in the
Change JNL Options window unchanged, then you must specify blank for the options. If you
specify blank for an option, the option value will remain unchanged. If you specify a value
other than blank, the specified value will be set to the selected journal groups.
5. See the Preview list in the Journal Operation window to check the settings that you have made.
•
To modify a setting, select and right-click the setting in the Preview list and then select
Modify.
•
To cancel a setting, select and right-click the setting and then select Cancel.
6. Select Apply to apply the settings.
NOTE: If an error occurs, the rightmost column of the Preview list displays the error code.
To view detailed information about the error, right-click the error code and then select Error
Detail. An error message appears and gives you detailed information about the error.
Figure 59 Change JNL Option Window
The Change JNL Option window displays the following information:
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Inflow Control: Allows you to specify whether to restrict inflow of update I/Os to the journal
volume (in other words, whether to slow delay response to hosts).
Yes indicates inflow will be restricted. No indicates inflow will not be restricted. If Yes is
selected and the metadata or the journal data is full, the update I/Os may stop.
•
Data Overflow Watch: Allows you to specify the time (in seconds) for monitoring whether
metadata and journal data are full. This value must be within the range of 0 to 600 seconds.
If Inflow Control is No, Data Overflow Watch does not take effect and does not display
anything.
•
Copy Pace: Allows you to specify the pace (speed) for an initial copy activity for one volume.
The default is Low.
◦ Low: The speed of the initial copy activity is slower than Medium and High.
◦ Medium: The speed of the initial copy activity is faster than Low and slower than High.
To specify Medium, ensure that the amount of update I/Os (that is, write requests from
hosts to primary data volumes) is 10 MB/s or less per one parity group. If it exceeds 10
MB/s, data volume pairs may become split (suspended).
128 Using Journal Groups