Hi! Backblaze employee who did some of the LB stuff here. It's relatively standard/straightforward. There's a L4 load balancing layer using IPVS and ECMP-via

Hi! Backblaze employee who did some of the LB stuff here. It's relatively standard/straightforward. There's a L4 load balancing layer using IPVS and ECMP-via-BGP, then a custom application that does the actual proxying/forwarding to the appropriate vault.