| Summary: | 碩士 === 國立清華大學 === 資訊工程學系 === 89 === Today, the Internet is penetrating into and affecting people’s life. As more people are on the network, the need for a quick, convenient and reliable way to obtaining information of one’s desire is soaring. LDAP is a directory server which allows people to look up information quickly and easily. Usually, groups of LDAP servers are used for storing magnitude data. To facilitate the communication and conversion between them, a mediator called LDAP Proxy is often used. LDAP Proxies provide many attractive functions, such as smart access control, external authentication, attribute conversion, etc. Unfortunately, current LDAP Proxies do not tackle the latency problem in accessing the backend directories. In this thesis, we propose a system called LDAP Cache Proxy, which incorporates caches into LDAP Proxies to store the most frequently accessed directory information closer to the clients.
We first describe our LDAP Cache Proxy architecture. We then introduce the experimental environment that we used to evaluate the performance of our proxy. The performance of LDAP Proxy and LDAP Cache Proxy is compared from different aspects, including cache hit ratios and LDAP Proxy server functions. Our experimental results show that when cache ratio is high enough, the overall LDAP performance will be improved using our LDAP Cache Proxy.
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