Emmanuel Lécharny wrote: > Le 08/02/15 13:52, Howard Chu a écrit : >> Been thinking this would be worth trying for a while now. Set a config >> option for syncprov to send Persist messages to a multicast group >> instead of the original TCP session. All the consumers would also join >> the group and listen for updates. This would also exercise the >> cldap:// support in libldap. >> >> Implementation details: since datagrams are unreliable, we need to >> include sequence numbers on each message, which the consumer can check >> to make sure it hasn't missed an update. Moreover, it should be able >> to send a request to the provider to resend (over the TCP session) the >> message corresponding to a given sequence number. > > Ok but how do you detect that a consumer has missed an update, if no > other update occurs ? You may have some desunchronized server for quite > a long period of time if you don't have a mechinism for the consumer to > regularly check if it is up to date. Good point, but easily solved with a periodic keepalive msg.