Quantum DXi4701 User Manual page 325

Quantum DXi4701 User's Guide
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 Enabling System Throttling
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
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 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 determined independently by
the bonding mode selected for the interface (see
page 303). 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.
• 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.
Chapter 9: DXi4701 Configuration
on page 256). The scheduled
on page 301).
Network
Scheduler
on
299