Chapter 6 Configuring Journal Groups 6-17
Hitachi Universal Replicator for IBM /OS User’s Guide
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 6-5 Change JNL Option Window
The Change JNL Option window displays the following:
• 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.
Note: 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.
Note: 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.
