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
proposes something, it seems to be 3 years old, and not active anymore.