Research and Design of a Two-Level Cache of CD Server
With the growth of resources of the CD on the network,the CD server becomes important technology that the CD network shares.To the shortcoming of the traditional CD server,we have realized a new high-performance CD server(CDS).CDS system adopts the technology of two-level Cache(client side Cache and server Cache) to improve systematic performance.According to the characteristic of order access of CD,client side Cache adopt fetch algorithm in advance which slowly increase and drop fast,this algorithm not only improve systematic performance,but also ensure the response time of missing when fetch in advance.Server Cache adopts two-level framework of balanced binary tree combined with Hash algorithm, realizes the looking for fast of Cache.While introduce two-level Cache algorithm of CDS system in detail,we have carried on the corresponding testing and analysis of performance.