Re: Cassandra on arm aws instances

2021-03-03 Thread Gil Ganz
I think the value of the r6gd (assuming cpu is good compared to intel) is more cpu, not disk. I'm not running on spark the cassandra servers, and having more cpu cores in my cluster will sure help. It all depends on the workloads, some workloads need more io, some cpu. i3 servers are great

Re: How to debug node load unbalance

2021-03-03 Thread Kane Wilson
Well, that looks like your problem. They are logical racks and they come into play when NetworkTopologyStrategy is deciding which replicas to put data on. NTS will ensure a replica goes on the first node in a different rack when traversing the ring, with the idea of keeping only one set of

Re: How to debug node load unbalance

2021-03-03 Thread Lapo Luchini
Hi! The nodes are all in different racks… except for node7 and node8! Which is something more that makes them similar (which I didn't notice at first), other than timeline of being added to the cluster. About the token ring calculation… I'll retry that in NodeJS instead of awk as a double

Re: How to debug node load unbalance

2021-03-03 Thread Kane Wilson
The load calculation always has issues so I wouldn't count on it, although in this case it does seem to roughly line up. Are you sure your ring calculation was accurate? It doesn't really seem to line up with the owns % for the 33% node, and it is feasible (although unlikely) that you could roll a