Could you explain more? When we add a new node, it should migrate data from other nodes, right? What happens if other nodes are absent? For example, the cluster consists of 3 nodes, but 2 nodes down, now we add the fourth new node, what happens then?
2018-05-01 12:01 GMT+08:00 Jeff Jirsa <jji...@gmail.com>: > nodetool decommission streams data from the losing replica, so only that > instance has to be online (and decom should be preferred to removenode) > > If that instance is offline, you can use removenode, but you risk violating > consistency guarantees > > Adding nodes is similar - bootstrap streams from the losing range > > -- > Jeff Jirsa > > >> On Apr 30, 2018, at 8:57 PM, Jinhua Luo <luajit...@gmail.com> wrote: >> >> Hi All, >> >> When a new node added, due to the even distribution of the new tokens, >> the current nodes of the ring should migrate data to this new node. >> >> So, does it requires all nodes be present? If not, then if some nodes >> are down, then it will miss the data migration of those parts, how and >> when to fix it? When those nodes come back? >> >> Similarly, the node removal would migrate its data to other nodes, so >> it seems that all other nodes must be present, otherwise it would lost >> data? >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org >> For additional commands, e-mail: user-h...@cassandra.apache.org >> > > --------------------------------------------------------------------- > To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org > For additional commands, e-mail: user-h...@cassandra.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@cassandra.apache.org For additional commands, e-mail: user-h...@cassandra.apache.org
