You don’t have to do anything else. Just use smart rsync flags (including delete).
It’ll work fine just the way you described. No special start args. No replacement flag Be sure you rsync the commitlog directory too . Flush and drain to be extra safe > On Feb 9, 2023, at 6:42 PM, Max Campos <mc_cassand...@core43.com> wrote: > > Hi - > > We have a node whose root partition is flaking out. The disk that contains > the Cassandra data, however, is healthy. > > We’d like to replace the dying node with a procedure like this: > > 0) OLD node is running, NEW node has never started Cassandra > 1) rsync Cassandra data from OLD node to NEW (1.2TB) > 2) Shutdown OLD node > 3) rsync any remaining Cassandra data from OLD to NEW > 4) Startup NEW node for the first time and have it take the place of the OLD > node in the cluster > > The goal here is to eliminate bootstrapping (streaming), because it’s a 1 for > 1 swap and we can easily rsync all of the data over to the new node in > advance. > > Questions: > > What do I need to do in step 4 to get Cassandra to take over the place of the > old node? > > Is this a wise idea? Or should I just bite the bullet and use > “-Dcassandra.replace_address” and do the bootstrapping (streaming)? I have > no idea how long it takes to stream 1.2 TB of data. > > Our cluster: > v3.0.23 > 2 DC > 3 nodes per DC > RF=3 > CL=LOCAL_QUORUM > > Thanks everyone. > > - Max
