Le 09/02/15 05:15, Howard Chu a écrit : > 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.
One more thing : you will have to deal with TLS at some point. There is a RFC draft (https://tools.ietf.org/html/draft-keoh-tls-multicast-security-00) that proposes something, it seems to be 3 years old, and not active anymore.
