If you can change to 8 vnodes, it will be much better for repairs and other kinds of streaming operations. The old advice of 256 per node is now not very helpful.
From: Ahmed Eljami <firstname.lastname@example.org>
Sent: Wednesday, March 13, 2019 1:27 PM
Subject: [EXTERNAL] Re: Cluster size "limit"
Yes, 256 vnodes
Le mer. 13 mars 2019 à 17:31, Jeff Jirsa <email@example.com> a écrit :
Do you use vnodes? How many vnodes per machine?
On Mar 13, 2019, at 3:58 PM, Ahmed Eljami <firstname.lastname@example.org> wrote:
We are planning to add a third datacenter to our cluster (already has 2 datacenter, every datcenter has 50 nodes, so 100 nodes in total).
My fear is that an important number of nodes per cluster (> 100) could cause a lot of problems like gossip duration, maintenance (repair...)...
I know that it depends on use cases, volume of data and many other thing, but I would like that you share your experiences with that.