Web site solutions to enhance the user experience: Portal Extreme case List Large concurrent write case (mainly cache case)

Analysis: high concurrency, large data write data, will write the data into memory, accumulate a certain amount, and then in a timed or quantitative write to disk (reduce the disk IO (input/output)), eventually will load the data into memory and provide external access .

Characteristics:

Advantages: Write data to memory, high performance, fast speed (Weibo, SNS, Seconds Kill product)

Cons: You may lose a piece of data in memory that has not yet been saved to disk

ways to resolve data without loss:

1) The battery is installed on the server board, and the memory data is written to the disk at the moment of power loss

2) UPS (a group of batteries) uninterruptible power supply (program 10 minutes, IDC data UPS 1 hours)

3) Choose two-way electric machine room, using dual power supply, respectively connected to different ways of electricity, the server to be placed in different cabinets, regions

Web site solutions to enhance the user experience: Portal Extreme case List Large concurrent write case (mainly cache case)