Quantum DXi6900 User Manual page 284

Chapter 9: Configuration
Scheduler
Scheduling Replication Throttling
During replication throttling, the DXi6900 limits the amount of source replication data it sends to not exceed
a specified maximum bandwidth. Schedule replication throttling to control the amount of network bandwidth
used by source replication at certain times. For example, you might configure replication throttling to occur
during planned backup times to avoid network contention.
Note: For more information about configuring the DXi6900 for replication, see
130.
To schedule replication throttling:
1. On the Scheduler page, add or edit an event in the Replication Throttle row (see
Scheduled Event on page
2. Specify the maximum allowed bandwidth by entering a value in the Bandwidth box and selecting the
units in the drop-down box (KB/s or MB/s). The lowest value you can set is 32 KB/s. The highest value
you can set is 125 MB/s for 1 GbE and 500 MB/s for 10 GbE.
Caution: Do not set the maximum allowed bandwidth to a value that is lower than necessary. If the
maximum allowed bandwidth is set to the lowest value, large replication jobs may fail.
During the replication throttle event, the DXi will limit the amount of data it sends during source
replication so that it does not exceed the specified bandwidth. After the replication throttle event ends,
the DXi will no longer throttle the sending of source replication data (until the next replication throttle
event occurs).
Do not configure a throttle schedule if a constant throttle is enabled (see ). The scheduled replication
throttling bandwidth settings take precedence over the constant throttle value. (The currently active
replication throttle rate appears on the Home page under Current Activity.)
3. (Optional) Specify when and how often the event reoccurs (see
Event on page 286).
4. Click Apply.
About Replication Throttling Statistics
Keep in mind the following information when observing actual network bandwidth usage during a
replication throttle event:
During a replication throttle event, only outgoing replication data traffic is throttled, not other outgoing
l
traffic. Because of this, you may observe network usage to be higher than the specified maximum
bandwidth. Differences in the sampling time period may also cause discrepancies between the
specified maximum bandwidth and observed traffic.
If the DXi is configured to use a bonded network interface for replication traffic, load balancing is
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determined independently by the bonding mode selected for the interface (see
Quantum DXi6900 User's Guide
281).
Replication on page
Adding or Editing a
Setting Recurrence for a Scheduled
Network on page 305).
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