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1. 发明授权

US4887204A System and method for accessing remote files in a distributed networking environment 失效
标题翻译：用于在分布式网络环境中访问远程文件的系统和方法
公开(公告)号：US4887204A
公开(公告)日：1989-12-12
申请号：US14897
申请日：1987-02-13
申请人： Donavon W. Johnson , Grover H. Neuman , Charles H. Sauer , Amal A. Shaheen-Gouda , Todd A. Smith
发明人： Donavon W. Johnson , Grover H. Neuman , Charles H. Sauer , Amal A. Shaheen-Gouda , Todd A. Smith
IPC分类号： G06F12/00 , G06F12/08 , G06F15/16 , G06F17/30
CPC分类号： G06F17/30194 , G06F12/0813 , G06F17/30132 , Y10S707/99938
摘要： A distrbuted services program installed on each of a plurality of data processing systems in a network allows the processors to access data files distrbuted across the various nodes of the network.To reduce the network traffic overhead when files at other nodes are accessed, and to preserve the file system semantics, i.e. the file integrity, the accessing of the various files are managed by file synchronization modes. A file is given a first synchronization mode if a file is open at only one node for either read or write access. A file is given a second synchronization mode if a file is opened for read only access at any node. A file is given a third synchronization mode if the file is open for read access in more than one node, and at least one node has the file open for write access.If a file is in either the first or second synchronization mode, the client node, which is the node accessing the file, uses a client cache within its operating system store the file. All read and writes are then sent to this cache.If a file is in the third mode, all read and write requests must go to the server node where the file resides. The node accessing the file does not use the cache in its operating system to access the file data during this third mode.

2. 发明授权

US4897781A System and method for using cached data at a local node after re-opening a file at a remote node in a distributed networking environment 失效
标题翻译：在分布式网络环境中的远程节点上重新打开文件之后，在本地节点上使用缓存数据的系统和方法
公开(公告)号：US4897781A
公开(公告)日：1990-01-30
申请号：US14899
申请日：1987-02-13
申请人： Albert Chang , Grover H. Neuman , Amal A. Shaheen-Gouda , Todd A. Smith
发明人： Albert Chang , Grover H. Neuman , Amal A. Shaheen-Gouda , Todd A. Smith
IPC分类号： G06F12/00 , G06F12/08
CPC分类号： G06F12/0813 , Y10S707/99952
摘要： In a distributed environment several data processing systems are interconnected across a network system. A distributed services program installed on the systems in the network allows the processors to access data files distributed across the various nodes of the network without regard to the location of the data file in the network. The processing system accessing file, referred to as the client processing system, utilizes a client cache within its operating system to store the data file. Utilizing the client cache minimizes the number of reads and writes that must go over the network to the server processing system where the file physically resides. The system and method of this invention prevents a process in the client processing system from accessing data in the client cache that has been modified at another node in the network. The blocks of data in the client cache are tested for validity in the client processing system by using modification times as measured by the server processing system. If the cache data blocks are determined to be valid, the data blocks are determined to be invalid, the data blocks are discarded, and the file is accessed from the server processing system.

3. 发明授权

US5175852A Distributed file access structure lock 失效
标题翻译：分布式文件访问结构锁定
公开(公告)号：US5175852A
公开(公告)日：1992-12-29
申请号：US418750
申请日：1989-10-04
申请人： Donavon W. Johnson , Amal A. Shaheen-Gouda , Todd A. Smith
发明人： Donavon W. Johnson , Amal A. Shaheen-Gouda , Todd A. Smith
IPC分类号： G06F9/46 , G06F17/30
CPC分类号： G06F17/30171 , G06F9/52 , Y10S707/99938 , Y10S707/99939
摘要： A distributed file management system (DFS) with a plurality of nodes and a plurality of files is disclosed. The DFS uses the UNIX operating system tree structure employing inodes (data structures containing the administrative information of each file) to manage the local files and surrogate inodes (s.sub.-- inode) to manage access to files existing on another node. In addition, the DFS uses a file access structure lock (fas.sub.-- lock) to manage multiple requests to a single file. The primary reason for the addition of the fas.sub.-- lock for each file is to avoid the problem of deadlocks. The inodes and s.sub.-- inodes use the fas.sub.-- lock to synchronize their accesses to a file and avoid a deadlock situation where both s.sub.-- inode and inode await the use of a file that is locked by the other.
摘要翻译：公开了具有多个节点和多个文件的分布式文件管理系统（DFS）。 DFS使用采用inode（包含每个文件的管理信息的数据结构）的UNIX操作系统树结构来管理本地文件和代理inode（s-inode）来管理对存在于另一个节点上的文件的访问。此外，DFS使用文件访问结构锁（fas-lock）来管理对单个文件的多个请求。为每个文件添加fas-lock的主要原因是避免死锁的问题。 inode和s-inode使用fas-lock来同步对文件的访问，并避免s-inode和inode等待使用被另一个锁定的文件的死锁情况。

4. 发明授权

US5151989A Directory cache management in a distributed data processing system 失效
标题翻译：分布式数据处理系统中的目录缓存管理
公开(公告)号：US5151989A
公开(公告)日：1992-09-29
申请号：US014889
申请日：1987-02-13
申请人： Donavon W. Johnson , Amal A. Shaheen-Gouda , Todd A. Smith
发明人： Donavon W. Johnson , Amal A. Shaheen-Gouda , Todd A. Smith
IPC分类号： G06F12/00 , G06F12/08 , G06F13/00 , G06F15/16 , G06F17/30 , H04L29/00
CPC分类号： G06F17/30955 , G06F12/0806 , G06F17/30067 , H04L29/00 , Y10S707/99952
摘要： An improved directory caching technique is provided for a plurality of data processing systems which are connected together in a network. In the system, when a local, or client, data processing system interrogates a remote, or server, data processing system for a unit of directory information, the server system is enabled to automatically send additional units of pertinent director information back to the client system in response to a subsequent change in the directory structure of the server system. If the server system is unable to continue updating the client system, for any of a plurality of possible reasons, the server system informs the client system of this fact, which enables the client system to purge itself of the formerly stored directory cache entry relative to this path, since the client system can no longer consider this cached path information to be currently correct.

5. 发明授权

US5001628A Single system image uniquely defining an environment for each user in a data processing system 失效
标题翻译：单个系统图像为数据处理系统中的每个用户唯一地定义环境
公开(公告)号：US5001628A
公开(公告)日：1991-03-19
申请号：US401546
申请日：1989-09-01
申请人： Donavon W. Johnson , Larry K. Loucks , Charles H. Sauer , Todd A. Smith
发明人： Donavon W. Johnson , Larry K. Loucks , Charles H. Sauer , Todd A. Smith
IPC分类号： H04L29/00
CPC分类号： H04L29/00 , Y10S707/99952
摘要： These master system files define the system characteristics that a user at any node in the system can expect to have. The master system files are mounted remotely from each of the nodes of the system and a local copy of the master system files is kept locally reflecting the current contents of the master system file. If a master system file is not available, the local copy is used in read only mode until the node containing the master is available. In addition, each user has its own file tree organization that dictates the necessary remote mounts of directories to enable a user logged on to any node to have the same view of the system that would be obtained from any other node in the system by that user.
摘要翻译：这些主系统文件定义系统中任何节点的用户可以期望具有的系统特性。主系统文件从系统的每个节点远程安装，并且主系统文件的本地副本保持本地反映主系统文件的当前内容。如果主系统文件不可用，则本地副本将以只读模式使用，直到包含主节点的节点可用。此外，每个用户都有自己的文件树组织，指定必要的远程安装目录，以使登录到任何节点的用户具有与该用户从系统中任何其他节点获得的系统相同的视图。

6. 发明授权

US5202971A System for file and record locking between nodes in a distributed data processing environment maintaining one copy of each file lock 失效
标题翻译：在分布式数据处理环境中的节点之间进行文件和记录锁定的系统，保持每个文件锁的一个副本
公开(公告)号：US5202971A
公开(公告)日：1993-04-13
申请号：US629073
申请日：1990-12-17
申请人： Larry W. Henson , Amal A. Shaheen-Gouda , Todd A. Smith
发明人： Larry W. Henson , Amal A. Shaheen-Gouda , Todd A. Smith
IPC分类号： G06F9/46 , G06F17/30
CPC分类号： G06F17/30171 , G06F9/52 , Y10S707/99938
摘要： A conventional single node operating system is provided with a distributed file management system (DFS) with a plurality of nodes and a plurality of files. The DFS uses the UNIX operating system tree structure employing inodes (data structure containing administrative information for each file) to manage the local files and surrogate inodes (s.sub.-- inode) to manage access to files existing on another node. In addition, the DFS uses a lock table to manage the lock status of files. The method which implements the DFS locking of records and files involves the following steps. If the file is a local file, then the UNIX operating system standard file locking is used. However, if a remote file is to be locked, the UNIX operating system LOCKF and FCNTL system calls are intercepted and an remote process call (RPC) DFS.sub.-- LOCK.sub.-- CONTROL is executed. The server node receives the remote process call and carries out the lock request. The request could entail locking a single record, a set of records or the whole file. The server then acknowledges receipt of the RPC by sending a signal while the client surrogate inode is waiting for a reply from the DFS.sub.-- LOCK.sub.-- CONTROL RPC. The client confirms the reception of the lock and sends an acknowledgement to the remote server. The server updates the lock table after receiving the acknowledgement from the client surrogate inode. If the server does not confirm the reception of DFS.sub.-- LOCK.sub.-- CONTROL's acknowledgement, then DFS.sub.-- LOCK.sub.-- CONTROL updates the lock table.
摘要翻译：传统的单节点操作系统提供有具有多个节点和多个文件的分布式文件管理系统（DFS）。 DFS使用采用inode的UNIX操作系统树结构（包含每个文件的管理信息的数据结构）来管理本地文件和代理inode（s-inode）来管理对存在于另一个节点上的文件的访问。此外，DFS使用锁表来管理文件的锁定状态。实现DFS锁定记录和文件的方法包括以下步骤。如果文件是本地文件，则使用UNIX操作系统标准文件锁定。但是，如果要锁定远程文件，则会拦截UNIX操作系统LOCKF和FCNTL系统调用，并执行远程进程调用（RPC）DFS-LOCK-CONTROL。服务器节点接收远程进程调用并执行锁定请求。该请求可能需要锁定单个记录，一组记录或整个文件。然后，服务器通过发送信号来确认RPC的接收，而客户端代理inode正在等待DFS-LOCK-CONTROL RPC的回复。客户端确认接收到锁并向远程服务器发送确认。服务器在从客户端代理索引节点收到确认后更新锁定表。如果服务器未确认接收到DFS-LOCK-CONTROL的确认，则DFS-LOCK-CONTROL更新锁定表。

7. 发明授权

US5537645A File lock management in a distributed data processing system 失效
标题翻译：分布式数据处理系统中的文件锁管理
公开(公告)号：US5537645A
公开(公告)日：1996-07-16
申请号：US345020
申请日：1994-11-23
申请人： Larry W. Henson , Donavon W. Johnson , Stephen P. Morgan , Todd A. Smith
发明人： Larry W. Henson , Donavon W. Johnson , Stephen P. Morgan , Todd A. Smith
IPC分类号： G06F17/30 , G06F13/00 , G06F12/16
CPC分类号： G06F17/30171 , Y10S707/99938
摘要： A distributed data processing system and method in which locks on a file are supported by a data structure that resides on either a client machine or on the file's server. When only a single client's processes are locking a file, the data structure can reside on that client. Whenever a plurality of client machines attempt to place locks on a file, the data structure is moved to the server; this forces the clients locking the file to communicate with the server when performing lock operations. When a client requests a lock from the server that cannot be granted because of an existing blocking lock, the client is informed that it should put the requesting process asleep awaiting a retry notification. When there is a change in the locks on the file that might allow such a client's now sleeping process to acquire the lock, the server sends a retry notice to the client. This awakens the sleeping process at the client, and the process then reattempts the lock operation by sending a message to the server.
摘要翻译：分布式数据处理系统和方法，其中文件上的锁由位于客户机或文件服务器上的数据结构支持。当只有一个客户端的进程锁定文件时，数据结构可以驻留在该客户端上。无论何时多个客户端机器试图将锁放置在文件上，数据结构被移动到服务器; 这将强制客户端在执行锁定操作时锁定文件与服务器进行通信。当客户端从服务器请求由于现有阻止锁定而无法授予的锁时，客户端被通知应该将请求进程等待重试通知。当文件上的锁更改可能允许这种客户端现在正在睡眠的进程获取锁定时，服务器会向客户端发送重试通知。这唤醒了客户端的睡眠过程，然后该过程通过向服务器发送消息来重新尝试锁定操作。

8. 发明授权

US5560008A Remote authentication and authorization in a distributed data processing system 失效
标题翻译：分布式数据处理系统中的远程认证和授权
公开(公告)号：US5560008A
公开(公告)日：1996-09-24
申请号：US352075
申请日：1989-05-15
申请人： Donavon W. Johnson , Todd A. Smith
发明人： Donavon W. Johnson , Todd A. Smith
IPC分类号： G06F15/16 , G06F9/46 , G06F12/00 , G06F12/14 , G06F13/00 , G06F21/00 , G06F21/20 , G06F21/24 , G09C5/00 , G06F15/163
CPC分类号： G06F21/6218
摘要： The system and method of this invention authorizes a process running at a client data processing system to have access to a service at a server data processing system. The data processing systems are connected by a communication link in a distributed processing environment. A set of credentials for the process are created at the server in response to a message from the client requesting a service. The server returns a credentials id identifying the created set of credentials to the client process. The client uses this returned id in subsequent requests and is authorized access as controlled by the set of credentials identified by the returned id in the subsequent request. The server can deny access to the service by the process if the id returned in a subsequent request is determined by the server not to identify the set of credentials. The server denies the access if the server requires an authentication of the process.
摘要翻译：本发明的系统和方法授权在客户端数据处理系统上运行的进程以访问服务器数据处理系统上的服务。数据处理系统通过分布式处理环境中的通信链路连接。响应于来自请求服务的客户端的消息，在服务器上创建用于进程的一组凭证。服务器将向客户端进程标识所创建的一组凭据的凭据标识。客户端在后续请求中使用此返回的ID，并且是由后续请求中返回的ID所标识的一组凭据控制的授权访问。如果后续请求中返回的id由服务器确定不识别凭证集，则服务器可以拒绝该进程对该服务的访问。如果服务器需要对进程进行身份验证，服务器将拒绝该访问。

9. 发明授权

US5226159A File lock management in a distributed data processing system 失效
标题翻译：分布式数据处理系统中的文件锁管理
公开(公告)号：US5226159A
公开(公告)日：1993-07-06
申请号：US893959
申请日：1992-06-04
申请人： Larry W. Henson , Donavon W. Johnson , Stephen P. Morgan , Todd A. Smith
发明人： Larry W. Henson , Donavon W. Johnson , Stephen P. Morgan , Todd A. Smith
IPC分类号： G06F17/30
CPC分类号： G06F17/30171 , Y10S707/99938
摘要： A distributed data processing system and method in which locks on a file are supported by a data structure that resides on either a client machine or on the file's server. When only a single client's processes are locking a file, the data structure can reside on that client. Whenever a plurality of client machines attempt to place locks on a file, the data structure is moved to the server; this forces the clients locking the file to communicate with the server when performing lock operations. When a client requests a lock from the server that cannot be granted because of an existing blocking lock, the client is informed that it should put the requesting process asleep awaiting a retry notification. When there is a change in the locks on the file that might allow such a client's now sleeping process to acquire the lock, the server sends a retry notice to the client. This awakens the sleeping process at the client, and the process then reattempts the lock operation by sending a message to the server.
摘要翻译：分布式数据处理系统和方法，其中文件上的锁由位于客户机或文件服务器上的数据结构支持。当只有一个客户端的进程锁定文件时，数据结构可以驻留在该客户端上。无论何时多个客户端机器试图将锁放置在文件上，数据结构被移动到服务器; 这将强制客户端在执行锁定操作时锁定文件与服务器进行通信。当客户端从服务器请求由于现有阻止锁定而无法授予的锁时，客户端被通知应该将请求进程等待重试通知。当文件上的锁更改可能允许这种客户端现在正在睡眠的进程获取锁定时，服务器会向客户端发送重试通知。这唤醒了客户端的睡眠过程，然后该过程通过向服务器发送消息来重新尝试锁定操作。

10. 发明授权

US5175851A System and method for controlling client machine access to a portion of a file with a variable length 失效
标题翻译：用于控制客户机访问具有可变长度的文件的系统和方法
公开(公告)号：US5175851A
公开(公告)日：1992-12-29
申请号：US352084
申请日：1989-05-15
申请人： Donavon W. Johnson , Stephen P. Morgan , Todd A. Smith
发明人： Donavon W. Johnson , Stephen P. Morgan , Todd A. Smith
IPC分类号： G06F15/16 , G06F12/00 , G06F17/30
CPC分类号： G06F17/30171 , G06F17/30215 , Y10S707/99938 , Y10S707/99939
摘要： A system and method in which client access to data at a server is synchronized to keep the data consistent by ensuring that each portion of the data accessible for modification at a node is not accessible for reading or modification by any other node, while allowing portions of the data accessible only for reading to be accessible by any number of nodes. If a conflicting request arises from a different client the server must revoke data that has been previously distributed to a client. For a revoke.sub.-- bytes request, all outstanding get.sub.-- bytes are marked so that the bytes that are being requested to be revoked will be discarded when they do arrive at the client. To insure that read and write system calls on a file are performed in a serializable fashion throughout a distributed environment, each machine at which a read is being performed must acquire a read token and each machine at which a write is being performed must acquire a read/write token from the server for the file. When any machine has a read/write token, no machine is allowed to have a read token, although any number of machines may have a read token at the same time. The server coordinates the distribution of these tokens by revoking all read tokens whenever a write token is requested and revoking the write token whenever any read token is requested.

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