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    • 99. 发明申请
    • Server Access Processing System
    • 服务器访问处理系统
    • US20170054804A1
    • 2017-02-23
    • US15331330
    • 2016-10-21
    • International Business Machines Corporation
    • Adekunle BelloRadhika ChirraNikhil HegdeAruna Yedavilli
    • H04L29/08H04L12/911H04L12/26H04L12/807H04L12/801
    • H04L67/1097H04L43/16H04L47/193H04L47/27H04L47/822H04L63/1458H04L67/143H04L69/16H04L69/163
    • A method, programmed medium and system are provided for preventing the denial of file system access to a plurality of clients accessing a NFS server. In one example, an NFS server is configured to listen on a server port. The server runs a separate daemon which “watches” client requests as they are received at the NFS server. The server processing system tracks the number of times a client sends consecutive TCP zero-window packets in response to a data packet from the server. If the number of zero-window packets crosses a user-defined threshold, then a routine is called to stop responding to that client using a backoff algorithm. When the server reaches a point where the number of available threads or any other relevant resource dips below a user-defined threshold, the server process starts terminating connections to the clients starting from the ones with the oldest entry in the table.
    • 提供了一种编程介质和系统的方法,用于防止文件系统访问访问NFS服务器的多个客户机的访问。 在一个示例中,NFS服务器配置为在服务器端口上侦听。 服务器运行一个单独的守护进程,它在NFS服务器上收到客户端请求。 服务器处理系统跟踪客户端响应于来自服务器的数据分组发送连续的TCP零窗口分组的次数。 如果零窗口数据包的数量跨越用户定义的阈值,则调用例程以使用退避算法停止对该客户端的响应。 当服务器达到可用线程数或任何其他相关资源下降到低于用户定义阈值的点时,服务器进程将从具有表中最早条目的服务器开始终止与客户端的连接。