Re: Node configuration and capacity

2021-01-13 Thread Elliott Sims
1% packet loss can definitely lead to drops. At higher speeds, that's enough to limit TCP throughput to the point that cross-node communication can't keep up. TCP_BBR will do better than other strategies at maintaining high throughput despite single-digit packet loss, but you'll also want to trac

Node configuration and capacity

2021-01-13 Thread MyWorld
Hi, We are currently using apache cassandra 3.11.6 in our production environment with single DC of 4 nodes. 2 nodes have configuration : Ssd 24 cores, 64gb ram, 20gb heap size Other 2 nodes have: Ssd 32cores, 64gb ram, 20gb heap size I have several questions around this. 1. Does different conf

Node Size

2021-01-13 Thread Joe Obernberger
Reading the documentation on Cassandra 3.x there is recommendations that node size should be ~1TByte of data.  Modern servers can have 24 SSDs, each at 2TBytes in size for data.  Is that a bad idea for Cassandra?  Does 4.0beta4 handle larger nodes? We have machines that have 16, 8TBytes SATA dri