Thanks, I'll read the code. On Thu, May 19, 2016 at 11:02 AM Jeff Jirsa <jeff.ji...@crowdstrike.com> wrote:
> > https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/locator/TokenMetadata.java#L731-L754 > > > And > > > https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/locator/TokenMetadata.java#L60-L88 > > > > Cassandra keeps a map of joining and leaving nodes, and does extra writes > to the appropriate nodes for mutations created after the streaming is > calculated. > > > > On 5/18/16, 7:33 PM, "Renjie Liu" <liurenjie2...@gmail.com> wrote: > > >Hi, cassandra devs: > >I'm learning cassandra and I can understand most of the techniques used. > >But I can't understand how cassandra ensures consistency when > >adding/removing a node? It seems that when a node joins the dht ring, some > >node need to transferring data to the new node using streaming. But the > >data may still get updated while transferring, so the new node can never > >catch up with it. How cassandra handles this? Will cassandra lose data > >during this process? > >-- > >Liu, Renjie > >Software Engineer, MVAD -- Liu, Renjie Software Engineer, MVAD
