Replication can now forward simple DB->put() and DB->del() write operations from a client site to the master site. These write operations must specify a NULL transaction handle in order to be forwarded. Each forwarded write operation is performed in its own transaction on the master site.
which
parameter value for the DB_ENV->rep_set_config() method to indicate
that write forwarding is enabled.
which
parameter value for the DB_ENV->rep_set_timeout() method to
indicate the amount of time a replication client waits
for a response from a forwarded write operation.