With the development of cloud computing, it can provide users a convenient way to access data, but the high concurrency access and data processing and other issues affect the use of cloud storage. In view of the system structure and load balancing problems in the development of cloud computing, cloud storage. This article first on the system structure design,and puts forward the suitable strategy of load balancing for large and medium scale deployment situation. Using consistent hash,accidentally delete restoration and backup between nodes technologies to ensure the in-tegrity of the cloud data. At last,through big and small files of unstructured data write experiment to test the perfor-mance of cloud storage,the experimental results show that Swiftstack cloud storage meet the requirements of the user's need of cloud storage.%云计算的发展虽然使用户可以便捷的访问数据，但系统的高并发性访问和数据处理等问题影响着云存储的使用。文章针对开源云计算、云存储发展中系统架构设计和负载均衡问题提出了改进方案。本文首先对系统架构进行设计，提出了适合大、中规模部署情况下负载均衡的设置策略。采用一致性哈希、误删除恢复及节点间互备等技术保证云数据的完整性。最后通过实验对云存储进行大、小文件非结构化数据的写入性能测试，实验结果表明Swiftstack云存储能够满足用户的对云存储的使用要求。
展开▼
