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1. 发明授权

US08930333B1 Lockahead for simultaneous readers and writers in a clustered file system 有权
标题翻译： Lockahead用于在集群文件系统中同时读写和写入
公开(公告)号：US08930333B1
公开(公告)日：2015-01-06
申请号：US13099843
申请日：2011-05-03
申请人： Harold B. Prince , Balemurughan Kumaresan , Kedar Patwardhan
发明人： Harold B. Prince , Balemurughan Kumaresan , Kedar Patwardhan
IPC分类号： G06F17/30
CPC分类号： G06F17/30171
摘要： A system and method for efficiently performing simultaneous access of files in a clustered file system. A cluster of nodes is coupled to a data storage medium. A first node executes a first thread with write operations for a given file. A second node executes a second thread with read operations for the given file. The first thread is appending the given file. In response, the first node requests a write lock range between an end-of-file for the given file to a highest possible endpoint. If a prediction determines the second thread may request read locks after the range it is currently reading, then the method enables the locks to be efficiently transferred from the first node to the second node before they are required on the second node, allowing the reading second node to proceed with fewer delays.
摘要翻译：一种用于有效地执行群集文件系统中的文件的同时访问的系统和方法。一组节点耦合到数据存储介质。第一个节点执行一个给定文件的写入操作的第一个线程。第二个节点执行给定文件的读取操作的第二个线程。第一个线程是附加给定的文件。作为响应，第一个节点请求给定文件的文件结尾之间的写入锁定范围到最高可能的端点。如果预测确定第二线程可能在其当前正在读取的范围之后请求读锁，则该方法使得能够在第二节点需要锁之前将其有效地从第一节点传送到第二节点，从而允许读取第二节点进行更少的延迟。

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