Is there a way to ask the zk cluster to switch leaders? Switch in such a way as it doesn't cause a "virtual bounce"? (I mean can we code something that would enable this)
Patrick Benjamin Reed wrote: > Creative idea. This should work. It's kind of a pain. I don't think > there is a Jira opened for this, but you should open one. It's really a > matter of implementation. You should be able to add (or remove) a > machine to ZooKeeper and just have it get integrated in without having > to do any restarting. The real problem with the restarting is that > eventually you will get to the leader which will cause a virtual bounce > of everyone when a new leader gets elected, so you really don't save > much by doing it gradually. > > ben > > Austin Shoemaker wrote: >> We are using Zookeeper to implement consistent hashing, and need to be >> able to add or remove hosts from the Zookeeper service without >> interrupting its functionality. >> >> According to http://zookeeper.wiki.sourceforge.net/ZooKeeperConfiguration: >> "Every machine that is part of the ZooKeeper service needs to know >> about every other machine. So, we need to have a list of machines in >> the configuration file." >> >> Can we add a single Zookeeper server to the service with an expanded >> host list without interrupting the proper functioning of the service? >> The old servers will each have host list s_1, ..., s_k, and the new >> server s_k+1 will have host list s_1, ..., s_k, s_k+1. Now we need to >> restart the rest of the servers one by one from s_1 to s_k with the >> new host list s_1, ..., s_k, s_k+1. Is this a violation of the service >> specification? >> >> Thanks, >> >> Austin >> >> ------------------------------------------------------------------------ >> >> ------------------------------------------------------------------------- >> This SF.Net email is sponsored by the Moblin Your Move Developer's challenge >> Build the coolest Linux based applications with Moblin SDK & win great prizes >> Grand prize is a trip for two to an Open Source event anywhere in the world >> http://moblin-contest.org/redirect.php?banner_id=100&url=/ >> ------------------------------------------------------------------------ >> >> _______________________________________________ >> Zookeeper-user mailing list >> Zookeeper-user@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/zookeeper-user >> > > > ------------------------------------------------------------------------ > > ------------------------------------------------------------------------- > This SF.Net email is sponsored by the Moblin Your Move Developer's challenge > Build the coolest Linux based applications with Moblin SDK & win great prizes > Grand prize is a trip for two to an Open Source event anywhere in the world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > > > ------------------------------------------------------------------------ > > _______________________________________________ > Zookeeper-user mailing list > Zookeeper-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/zookeeper-user ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/ _______________________________________________ Zookeeper-user mailing list Zookeeper-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/zookeeper-user
