Summary
Asia-Pacific Network Operations and Management Symposium
2022
Session Number:TS9
Session:
Number:TS9-02
Who Owns the Address? A Performant Block Storage Model for Hybrid Cloud
Feng Jiang, Yongyang Cheng, Boqin Qin, Zhao Hui,
pp.-
Publication Date:2022/09/28
Online ISSN:2188-5079
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Summary:
Rapidly growing data volumes stimulate the migration of block storage from on-premise to hybrid cloud. Hybrid cloud block storage is composed of both on-premise and remote cloud storage. Unfortunately, the heterogeneity of on-premise clients (e.g., laptops, mobile devices, etc.) with various operating systems encumber the hybrid cloud architecture design. What's worse, the demanding fault-tolerance and latency requirements pose challenges to the block storage system.Under the premise of strong consistency and availability, there are two mainstream models of hybrid storage systems: the low latency but low throughput ``active-standby'' model where only one node can provide reads and writes, and the high throughput but high latency ``active-active'' model where all nodes can provide reads and writes. To address the dilemma between throughput and latency, we design a novel storage model called the ``logical-active'' model, which partitions the input data into shards in terms of the block address ranges and selects one owner node called ``logical-active'' for each shard.A unique ``logical-active'' node manages the creation and deletion of the shard and provides reads and writes for the clients, while one or more borrower nodes called ``logical-standby'' provide only reads after synchronization with the ``logical-active'' node. In this way, the ``logical-active'' model achieves low latency close to the ``active-standby'' model and high throughput close to the ``active-active'' model.