Changing the Window Size

The window size is a property of the replication server and specifies the number of change requests that are sent to directory servers, without the replication server having to wait for an acknowledgment from the directory server before continuing.

The window size represents the maximum number of update messages that can be sent without immediate acknowledgment from the directory server. It is more efficient to send many messages in quick succession instead of waiting for an acknowledgment after each one. Using the appropriate window size, you can eliminate the time replication servers spend waiting for acknowledgments to arrive. The default window size is 100. If you notice that some directory servers are lagging behind in terms of replicated changes, increase the window size to a higher value and check replication performance again before making further adjustments.

To Change the Window Size

1. (Optional) Display the current value of the window size:

   $ dsconfig -D "cn=directory manager" -w password -n get-replication-server-prop \
     --provider-name "Multimaster Synchronization" --advanced --property window-size
   
   Property    : Value(s)
   ------------:---------
   window-size : 100    

2. Change the window size.

   The following command changes the window size to 200.

   $ dsconfig -D "cn=directory manager" -w password -n set-replication-server-prop \
     --provider-name "Multimaster Synchronization" --set window-size:200