Update README.md

README.md

 # CURVE
 
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 CURVE是网易自主设计研发的高性能、高可用、高可靠分布式存储系统，具有非常良好的扩展性。基于该存储底座可以打造适用于不同应用场景的存储系统，如块存储、对象存储、云原生数据库等。当前我们基于CURVE已经实现了高性能块存储系统，支持快照克隆和恢复 ,支持QEMU虚拟机和物理机NBD设备两种挂载方式, 在网易内部作为高性能云盘使用。