Ran into an Interesting Datacenter operations problem: most of our high availability stuff uses raft, which requires 2 out of 3 (or 3/5 etc) nodes to survive power failure to continue.
However, power is A/B and if the power line with the larger number of nodes fails, it takes down the cluster.
How would you solve this?
@aep forgive my ignorance, but I thought most (throughout oriented) server power supplies were 2N redundant, so you’d put each node on both incoming lines?
(I understand HPC is normally N+1 as the requirements are different when compute not movement is the biggest cost)
@aep oh, DC as in direct current not datacenter oops
@coral oh yeah lol. Sorry for the ambiguity. It's been worse when you talk about DC DC converters for Datacenters
@aep https://epubs.siam.org/doi/10.1137/0212045 suggests yes, but at the cost of every write you do taking n/2+1 communications to commit… probably not a good tradeoff va keeping a raft primary on a huge UPS