Quantum DXi4700

Chapter 9: Configuration
Scheduler
Quantum DXi4700 User’s Guide 270
Note: For more information about configuring the DXi4700 for replication, see About the Replication
Page.
To schedule replication throttling:
1. On the Scheduler page, add or edit an event in the Replication Throttle row (see Adding or Editing a
Scheduled Event on page 267).
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 Setting Recurrence for a Scheduled
Event on page 272).
4. Click Apply.
About Replication Throttling Statistics
Keep in mind the following information when observing actual network bandwidth usage during a
replication throttle event:
l During a replication throttle event, only outgoing replication data traffic is throttled, not other outgoing
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.
l If the DXi is configured to use a bonded network interface for replication traffic, load balancing is
determined independently by the bonding mode selected for the interface (see Network). Because of
this, you may need to sum the values for all slave devices in the bonded interface to calculate the
overall outgoing traffic rate.
l The replication throttle bandwidth maximum is specified in KB/s or MB/s, so depending on the statistic
or report you are observing, you may need to convert the bandwidth maximum to Kb/s or Mb/s in order
to correctly compare it to the observed values.
Scheduling E-mail Reports
The DXi4700 can automatically generate a report with system status data or with configuration data and
send it to all configured e-mail recipients.