Pangaea: A Single Key Space, Inter-datacenter Key-Value Store

This paper presents Pangaea, an inter-data center key-value store that keeps reasonable expandability of storage capacity, data lookup latency and data transfer speed. Pangaea uses two techniques called multi-layered DHT (ML-DHT) and local-first data rebuilding (LDR). ML-DHT provides a global and consistent index of key-value pairs with efficient routings in inter-data center environments. LDR reduces inter-data center data transfer by using erasure coding techniques.