Interesting, there is no such explicit warning for v.3
https://docs.datastax.com/en/cassandra/3.0/cassandra/operations/opsAddNodeToCluster.html
It says
- Start the bootstrap node.
- verify that the node is fully bootstrapped and all other nodes are up (UN)
Does it mean that we should start them one by one? May somebody from developers
can clarify this issue?
On Wednesday, April 12, 2017 9:16 PM, Jacob Shadix <jacobsha...@gmail.com>
wrote:
It's still not recommended to start at the same time. Stagger by 2 minutes is
what the following documentation suggests; along with additional steps. re.
version 2.1
https://docs.datastax.com/en/cassandra/2.1/cassandra/operations/ops_add_node_to_cluster_t.html
-- Jacob Shadix
On Wed, Apr 12, 2017 at 1:48 PM, Vlad <qa23d-...@yahoo.com> wrote:
But it seems OK to add multiple nodes at once, right?
On Tuesday, April 11, 2017 8:38 PM, Jacob Shadix <jacobsha...@gmail.com>
wrote:
Right! Another reason why I just stick with sequential decommissions. Maybe
someone here could shed some light on what happens under the covers if parallel
decommissions are kicked off.
-- Jacob Shadix
On Tue, Apr 11, 2017 at 12:55 PM, benjamin roth <brs...@gmail.com> wrote:
I did not test it but I'd bet that parallel decommision will lead to
inconsistencies.Each decommission results in range movements and range
reassignments which becomes effective after a successful decommission.If you
start several decommissions at once, I guess the calculated reassignments are
invalid for at least one node after the first node finished the decommission
process.
I hope someone will correct me if i am wrong.
2017-04-11 18:43 GMT+02:00 Jacob Shadix <jacobsha...@gmail.com>:
Are you using vnodes? I typically do one-by-one as the decommission will create
additional load/network activity streaming data to the other nodes as the token
ranges are reassigned.
-- Jacob Shadix
On Sat, Apr 8, 2017 at 10:55 AM, Vlad <qa23d-...@yahoo.com> wrote:
Hi,
how multiple nodes should be decommissioned by "nodetool decommission"- one by
one or in parallel ?
Thanks.
