<div dir="ltr">There is still an uncovered point where both servers have online users and they connect. <div class="gmail_quote">On Sat, Oct 30, 2010 at 3:31 PM, Sergey Dobrov <<a href="mailto:binary@jrudevels.org">binary@jrudevels.org</a>> wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div class="im">On 10/30/2010 08:27 PM, pablo platt wrote: > > > On Sat, Oct 30, 2010 at 3:22 PM, Sergey Dobrov <<a href="mailto:binary@jrudevels.org">binary@jrudevels.org</a> </div><div class="im">> <mailto:<a href="mailto:binary@jrudevels.org">binary@jrudevels.org</a>>> wrote: > > On 10/30/2010 08:00 PM, pablo platt wrote: > > Hi > > > > I understand that xmpp federation is similar to mail servers. > > There is some kind of verification and stanzas are sent in a fire and > > forget way. > > A server doesn't need to keep track of the presence of users from > other > > servers > > or other kind of distributed state except for the actual connection. > > > > I couldn't find info about how to handle failures. </div>> > Let's say <a href="http://host1.com" target="_blank">host1.com</a> <<a href="http://host1.com" target="_blank">http://host1.com</a>> <<a href="http://host1.com" target="_blank">http://host1.com</a>> on <div class="im">> server1 has <a href="mailto:user1@host1.com">user1@host1.com</a> <mailto:<a href="mailto:user1@host1.com">user1@host1.com</a>> </div>> > <mailto:<a href="mailto:user1@host1.com">user1@host1.com</a> <mailto:<a href="mailto:user1@host1.com">user1@host1.com</a>>> and <a href="http://host2.com" target="_blank">host2.com</a> > <<a href="http://host2.com" target="_blank">http://host2.com</a>> <<a href="http://host2.com" target="_blank">http://host2.com</a>> on server2 has > > <a href="mailto:user2@host2.com">user2@host2.com</a> <mailto:<a href="mailto:user2@host2.com">user2@host2.com</a>> <mailto:<a href="mailto:user2@host2.com">user2@host2.com</a> <div class="im">> <mailto:<a href="mailto:user2@host2.com">user2@host2.com</a>>> > > user1 and user2 has each other on their rosters. > > user1 is already logged in and now user2 is logging in and sending a > > presence stanza. > > host2 pass the presence stanza to host1 with the to attribute and a > > presence probe. > > host1 pass the presence to user1 and respond with user1's presence. > > host1 doesn't remember that user2 is online and the opposite. > > > > 1.server2 has a power failure and it is back up in few minutes. > > Does host2 need to send offline presence for all its users to hsot1? > > > No, If user is offline too long, user will see remote-server-timeout > error if it sent any stanza to him. > > > 2. server2 is running but the connection to server1 is lost for > few minutes. > > When the connection is back, the online users are not in sync. > > How do I handle this situation? > > > TCP gives you a guarantee that data will be delivered to a recipient. > This problem is occured only if connection was down too long. And the > answer is the same such 1. > > > > What about users that logged in when server2 was down? </div>remote-server-not-found or timeout error in presence if server will be down more than timeout value. <div class="im"> > What if server1 is restarted, it won't know about online users in server2. </div>When users on server2 will log in they will send probes and users on server 1 will inform about them statuses. <div class="im"> > > > > > 3. When host1 sends a stanza to a user on host2 that is offline, > > does host2 respond with an error? > > > It's related on stanza kind and server's settings. If you send a message > you will store it in the offline storage for example. But if you send iq > stanza to a full jid server will return service-unavailable error. > > > Is there a doc explaining s2s implementation? > > RFC 3920 > > > RFC 3920 is too general > I think that a section dedicated to all aspects of s2s will be very helpful. > </div>I think it's enough. <div class="im"> > > > > > > Thanks > > > > > > > > > > > > > > > > > > _______________________________________________ > > JDev mailing list > > Forum: <a href="http://www.jabberforum.org/forumdisplay.php?f=20" target="_blank">http://www.jabberforum.org/forumdisplay.php?f=20</a> > > Info: <a href="http://mail.jabber.org/mailman/listinfo/jdev" target="_blank">http://mail.jabber.org/mailman/listinfo/jdev</a> > > Unsubscribe: <a href="mailto:JDev-unsubscribe@jabber.org">JDev-unsubscribe@jabber.org</a> </div>> <mailto:<a href="mailto:JDev-unsubscribe@jabber.org">JDev-unsubscribe@jabber.org</a>> <div class="im">> > _______________________________________________ > > > -- > With best regards, > Sergey Dobrov, > XMPP Developer and JRuDevels.org founder. > > _______________________________________________ > JDev mailing list > Forum: <a href="http://www.jabberforum.org/forumdisplay.php?f=20" target="_blank">http://www.jabberforum.org/forumdisplay.php?f=20</a> > Info: <a href="http://mail.jabber.org/mailman/listinfo/jdev" target="_blank">http://mail.jabber.org/mailman/listinfo/jdev</a> > Unsubscribe: <a href="mailto:JDev-unsubscribe@jabber.org">JDev-unsubscribe@jabber.org</a> </div>> <mailto:<a href="mailto:JDev-unsubscribe@jabber.org">JDev-unsubscribe@jabber.org</a>> > _______________________________________________ <div><div></div><div class="h5">> > > > > _______________________________________________ > JDev mailing list > Forum: <a href="http://www.jabberforum.org/forumdisplay.php?f=20" target="_blank">http://www.jabberforum.org/forumdisplay.php?f=20</a> > Info: <a href="http://mail.jabber.org/mailman/listinfo/jdev" target="_blank">http://mail.jabber.org/mailman/listinfo/jdev</a> > Unsubscribe: <a href="mailto:JDev-unsubscribe@jabber.org">JDev-unsubscribe@jabber.org</a> > _______________________________________________ -- With best regards, Sergey Dobrov, XMPP Developer and JRuDevels.org founder. _______________________________________________ JDev mailing list Forum: <a href="http://www.jabberforum.org/forumdisplay.php?f=20" target="_blank">http://www.jabberforum.org/forumdisplay.php?f=20</a> Info: <a href="http://mail.jabber.org/mailman/listinfo/jdev" target="_blank">http://mail.jabber.org/mailman/listinfo/jdev</a> Unsubscribe: <a href="mailto:JDev-unsubscribe@jabber.org">JDev-unsubscribe@jabber.org</a> _______________________________________________ </div></div></blockquote></div> </div>