HP StorageWorks XP Remote Web Console Software - Manual (Page 169)

Figure 74 Change JNL Option Window
The Change JNL Option window displays the following settings:
•
Inflow Control: Allows you to specify whether to restrict the inflow of update I/Os to the journal
volume (in other words, whether to slow the 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. Select No if you give priority to Universal Replicator for Mainframe pairs suspending
than the influence giving to the host performance.
•
Data Overflow Watch: Allows you to specify the time (in seconds) to monitor the journal data
area to know if it is full. This value must be between 0 and 600 seconds. If this option is 100
seconds, and the state that new journal data cannot be stored continues for 100 seconds, it
will generate an error and the copy operation stops.
If Inflow Control is not enabled, Data Overflow Watch will not take effect and nothing is
displayed.
The metadata area is not subject to Data Overflow Watch. If the metadata area is full,
regardless of the Data Overflow Watch value, the journal group is suspended with an error.
•
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).
◦ High: The speed of the initial copy activity is faster than Low and Medium.
To specify High, ensure that update I/Os (that is, write requests from hosts to primary
data volumes) will not occur. If update I/Os occur, data volume pairs may become split
(suspended).
NOTE: The secondary storage system administrator cannot specify this option.
•
Unit of Path Watch Time: Allows you to specify the unit of path watch time. You can specify
one of the following settings: minute, hour, or day.
Changing Options for a Journal Group 169