Apparatus and Method for Hardware-Based File System
    5.
    发明申请
    Apparatus and Method for Hardware-Based File System 有权
    基于硬件的文件系统的装置和方法

    公开(公告)号:US20080040385A1

    公开(公告)日:2008-02-14

    申请号:US11841353

    申请日:2007-08-20

    IPC分类号: G06F7/00

    摘要: A hardware-based file system includes multiple linked sub-modules that perform functions ancillary to client data handling. Each sub-module is associated with a metadata cache. A doubly-rooted structure is used to store each file system object at successive checkpoints. Metadata is stored within an object and/or as a separate object. Provisions are made for allocating sparse objects. A delayed write feature is used for writing certain objects into non-volatile storage. Checkpoints can be retained as read-only versions of the file system. Modifications to the file system are accomplished without affecting the contents of retained checkpoints. The file system can be reverted to a retained checkpoint. Multiple file servers can be interconnected as a cluster, and each file server stores requests from another file server. Interconnections between file servers can be dynamically modified. A distributed locking mechanism is used to control access to file system objects stored by the file servers.

    摘要翻译: 基于硬件的文件系统包括执行辅助客户端数据处理的功能的多个链接的子模块。 每个子模块与元数据缓存相关联。 双根结构用于在连续的检查点存储每个文件系统对象。 元数据存储在对象和/或作为单独对象中。 作出分配稀疏物品的规定。 延迟写入功能用于将某些对象写入非易失性存储器。 检查点可以保留为文件系统的只读版本。 文件系统的修改是在不影响保留检查点的内容的情况下完成的。 文件系统可以恢复到保留的检查点。 多个文件服务器可以作为集群互连,每个文件服务器存储来自另一个文件服务器的请求。 可以动态修改文件服务器之间的互连。 分布式锁定机制用于控制对文件服务器存储的文件系统对象的访问。

    Apparatus and method for synchronizing a digital data clock in a
receiver with a digital data clock in a transmitter
    6.
    发明授权
    Apparatus and method for synchronizing a digital data clock in a receiver with a digital data clock in a transmitter 失效
    用于使接收机中的数字数据时钟与发射机中的数字数据时钟同步的装置和方法

    公开(公告)号:US5297869A

    公开(公告)日:1994-03-29

    申请号:US858344

    申请日:1992-03-26

    申请人: Simon Benham

    发明人: Simon Benham

    摘要: A receiving apparatus for synchronising a digital data clock in a receiver with a digital data clock in a transmitter and a method therefor is disclosed which utilizes two phase-locked loops so as to improve accuracy and jitter performance. One of the phase-locked loops is locked onto positive edges in a received waveform and the other phase-locked loop is locked onto negative edges. The phase-locked loops independently decode the 1's and 0's in the data allowing the transmit data and clock to be readily recovered. Each of the phase-locked loops uses a decoding method in which mid-bit transitions in the encoded received waveform are detected in more than half of the sampling periods within one bit period which further improves the performance of the apparatus.

    摘要翻译: 公开了一种用于使接收机中的数字数据时钟与发射机中的数字数据时钟同步的接收装置及其方法,其利用两个锁相环来提高精度和抖动性能。 其中一个锁相环锁定在接收波形的正边沿,另一个锁相环被锁定在负边缘。 锁相环独立解码数据中的1和0,允许发送数据和时钟容易恢复。 每个锁相环使用解码方法,其中在一个比特周期内在多于一半的采样周期中检测编码的接收波形中的中间位转换,这进一步提高了装置的性能。