With multicore processors bringing parallel computing to the masses, there is an urgent need to make concurrent programming easier.
多核处理器会引爆并行计算，因此当务之急是降低并发编程的难度。
2
In network computing environments, as large number of concurrent user access Shared database, the database servers often become performance bottlenecks.
在网络计算环境下，当大量客户同时存取数据库资源，数据库服务器常成为性能瓶颈。
3
Then people suddenly thought of a good way: gather together all of the computing resources as a whole (a cloud), through the concurrent use of resources to complete the operation request.