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Chapter 14. Improving the latency in a multi-supplier replication environment
In certain multi-supplier replication environments, for example if the servers are connected over a wide area network (WAN), the replication latency can be high if multiple suppliers receive updates at the same time. This happens when one supplier exclusively accesses a replica without releasing it for a long time. In such situations, other suppliers cannot send updates to this consumer, which increases the replication latency.
To release a replica after a fixed amount of time, set the nsds5ReplicaReleaseTimeout parameter on suppliers and hubs.
The 60 seconds default value is ideal for most environments. A value set too high or too low can have a negative impact on the replication performance. If you set the value too low, replication servers are constantly reacquiring each other, and servers are not able to send many updates. In a high-traffic replication environment, a longer timeout can improve situations where one supplier exclusively accesses a replica. However, in most cases, a value higher than 120 seconds slows down replication.
14.1. Setting the replication release timeout using the command line
To improve the replication efficiency in a multi-supplier replication environment, update the replication release timeout value on all hubs and suppliers.
Prerequisites
- You configured replication between multiple suppliers and hubs.
Procedure
Set the timeout value for the suffix:
dsconf <instance_name> replication set --suffix="dc=example,dc=com" --repl-release-timeout=70
# dsconf <instance_name> replication set --suffix="dc=example,dc=com" --repl-release-timeout=70Copy to Clipboard Copied! Toggle word wrap Toggle overflow This command changes the replication timeout of the
example,dc=comsuffix to70seconds.Restart the instance:
dsctl <instance_name> restart
# dsctl <instance_name> restartCopy to Clipboard Copied! Toggle word wrap Toggle overflow
14.2. Setting the replication release timeout using the web console
To improve the replication efficiency in a multi-supplier replication environment, update the replication release timeout value on all hubs and suppliers.
Prerequisites
- You configured replication between multiple suppliers and hubs.
Procedure
- On the tab, select the suffix entry.
-
Click
Show Advanced Settings. -
Update the value in the
Replication Release Timeoutfield. - Click .
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