Data Domain: Benefits of Data Domain replication throttle

Summary: This article lists the benefits of Data Domain replication throttle.

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Instructions

Generally, a replication throttle is seen as a limiting factor in the overall replication speed, but set correctly, a replication throttle can enhance a replication configuration. 

The reason for this is because after 5 mbps the Data Domain (DD) assumes unlimited bandwidth. In large environments, when the DD can reach the upper limit for transfer rate between sites, this can cause issues over time. 

By setting a replication throttle, it is possible to inform the Data Domain what that bandwidth limit is. This allows a graceful adjustment of the limitation rather than dropping streams that would cause the Data Domain to exceed the limit. 

Best Practice: Set the DD replication throttle to 90-95% of the required maximum bandwidth. It is then not in danger of overutilizing the replication network (resulting in dropped streams). 

 

To check for a replication throttle, use the following command:

replication throttle show 
Throttle: Default
No scheduled throttle times.
Actual throttle value: unlimited bps

-- Or --

Throttle: Default
 Time       Sun       Mon       Tue       Wed       Thu       Fri       Sat
 ----       ---       ---       ---       ---       ---       ---       ---
07:00         - unlimited         -         -         -         -         -
 ----       ---       ---       ---       ---       ---       ---       ---
All units in bps (bits per second).
Active schedule: Mon, 07:00 at unlimited bps.
Actual throttle value: unlimited bps
 

 To add a replication throttle:

replication throttle add <sched-spec> <rate>
 

Examples:

replication throttle add wed 0900 unlimited
Adding new schedule for Wed at 09:00 for unlimited bps
replication throttle add wed wed 1000 100000
...No units specified; 100000 * 1 = 100000 bps (100 Kbps).
replication throttle show
Throttle: Default
 Time       Sun       Mon       Tue       Wed       Thu       Fri       Sat
 ----       ---       ---       ---       ---       ---       ---       ---
07:00         - unlimited         -         -         -         -         -
09:00         -         -         - unlimited         -         -         -
10:00         -         -         -      100K         -         -         -
 ----       ---       ---       ---       ---       ---       ---       ---
All units in bps (bits per second).
Active schedule: Wed, 10:00 at 100K bps.
Actual throttle value: 100K bps
 

To reset the replication throttle:

replication throttle reset all
Schedules reset.  Throttle reset to unlimited.
replication throttle show 
Throttle: Default
No scheduled throttle times.
Actual throttle value: unlimited bps
 

For additional information about how to configure replication throttle on the Data Domain see Data Domain - Replication Throttle.

Additional Information

Note replication throttle is a global setting on the Data Domain. As such it affects Avamar controlled MFR replication and Data Domain native replications.

Affected Products

Avamar

Products

Avamar, Data Domain
Article Properties
Article Number: 000004735
Article Type: How To
Last Modified: 27 May 2025
Version:  5
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