分布式LDAP系统的引用研究  

The Research on the Referral of Distributed LDAP System Mechanism

作　　者：安慧峰 

机构地区：[1]北京邮电大学网络技术研究院,北京100876

出　　处：《软件》2013年第10期23-26,共4页Software

摘　　要：LDAP是轻量级目录访问协议的缩写。LDAP是X.500标准在TCP/IP上的实现,它采用树状层次存储结构,树的各层节点就是条目。分布式LDAP系统中,多个LDAP服务器构建不同的域,任何服务器上都可以查询到整个系统的数据。分布式LDAP系统使用引用机制在LDAP服务器间建立连接关系。客户端访问本地服务器查询条目,如果本地服务器发现查询条目不属于本域,它就会根据引用地址访问其他服务器,直至返回被查询条目的数据。但如果客户端查询的条目不在任何域内,则会导致引用死锁,客户端得不到响应,一直处于等待状态。针对上述问题,论文提出增加LDAP Message字段的解决方案,并测试验证方案可行性。LDAP is abbreviation of the Lightweight Directory Access Protocol. LDAP is an implementation of X.500 over TCP, which uses a tree hierarchical storage structure, and the tree node is the entry. There are multiple LDAP servers with different domains in a distributed LDAP system, any server can query all the data throughout the system. Distributed LDAP system uses referral mechanism to establish connections among LDAP servers. Client queries the local server an entry, which does not belong to the local server＇s domain, then the local server will query other server according to the reference address. If the client queries an entry not in any domain, there xill result in a reference deadlock, and the client will wait for the response. In response to the problem, the paper put forwards a solution which extends the LDAP Message transmission packet, tests and verifies the feasibility.

关 键 词：计算机应用技术 目录服务 分布式系统 OPENLDAP 引用 

分 类 号：TP311.13[自动化与计算机技术—计算机软件与理论]