SRDF groups provide a collective data transfer path linking volumes of two separate storage systems.
Steps
-
Select a storage system.
-
Select
.
-
Select a group, click
, and select
SRDF/A Pacing Setting.
-
Type the maximum I/O delay to apply to each host write I/O when the pacing algorithm is invoked (Pacing Delay). Possible values range from 1 to 1,000,000 micro seconds (0.000001 s to 1 s), with 50,000 (0.05 s or 50 milliseconds) being the default.
-
Type the minimum cache percentage when host write pacing begins (Threshold). Possible values range from 1 to 99, with 60% being the default .
- Optional:
Select to set the threshold on both the R1 and R2 sides (Both Sides).
- Optional:
Set the following write pacing attributes for the SRDF group, the volumes in the group, or both:
- Select (enable) the SRDF/A write pacing feature to automatically start when an SRDF/A session is activated (Autostart Group Pacing and
Autostart Volume Pacing). This feature must be activated in order to invoke host write I/O pacing.
- Manually
Activate/Deactivate the SRDF/A write pacing feature for the SRDF group. Setting this option to
No Change leaves the current write pacing setting.
SRDF/A write pacing can only be activated when the SRDF/A session is active.
-
Do one of the following:
- Click
Run Now to perform the operation now.
- Expand
Run Now and click
Add to Job List to add this task to the job list, from which you can schedule or run the task at your convenience. For more information, see
Schedule jobs and
Preview jobs.
