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    • 71. 发明授权
    • Time indexed file system
    • 时间索引文件系统
    • US08060481B1
    • 2011-11-15
    • US11439302
    • 2006-05-23
    • Craig K. HarmerJohn A. ColgrovePeter VajgelMilind BorateBhimsen Bhanjois
    • Craig K. HarmerJohn A. ColgrovePeter VajgelMilind BorateBhimsen Bhanjois
    • G06F7/00G06F12/00G06F17/00
    • G06F17/30091G06F11/14G06F17/3023
    • A method and mechanism for managing a time-indexed block map in a file system configured to store multiple versions of file data. A file system includes inodes or other structures corresponding to files in the system. Responsive to creating a file, one or more blocks are allocated for use in storing the file data. A block map is maintained for the file and is updated to include an identification of the blocks storing the file data and a timestamp corresponding to the stored data. In response to creating a file, data corresponding block map is maintained. In addition, a new entry is created in the block map which identifies the newly allocated blocks. Further, an entry of the block map is updated to (i) identify the particular blocks to which the write was directed and (ii) include a timestamp corresponding to the time of the write.
    • 一种用于管理被配置为存储文件数据的多个版本的文件系统中的时间索引块映射的方法和机制。 文件系统包括与系统中的文件相对应的inode或其他结构。 响应于创建文件,分配一个或多个块用于存储文件数据。 维持该文件的块映射并被更新为包括存储该文件数据的块的标识以及与存储的数据相对应的时间戳。 响应于创建文件,保持数据对应的块映射。 此外,在块映射中创建一个新条目,该条目标识新分配的块。 此外,块图的条目被更新为(i)识别写入所针对的特定块,并且(ii)包括与写入时间相对应的时间戳。
    • 72. 发明授权
    • Data protection mechanism
    • 数据保护机制
    • US07320008B1
    • 2008-01-15
    • US11017300
    • 2004-12-20
    • John A. Colgrove
    • John A. Colgrove
    • G06F7/00G06F17/00G06F11/30G06F12/14H04L9/32
    • G06F21/6227Y10S707/99943
    • System and method for protecting data systems such as file systems, volume managers, databases, and backup systems. In embodiments, rather than encrypting the data of a data system, one or more elements or levels of metadata may be encrypted. Some embodiments may encrypt metadata that is not accessed frequently to minimize the cost of encryption and decryption. Alternatively, instead of encrypting an entire metadata, only a portion, such as a header block, of the metadata may be encrypted. The encrypted metadata may be stored in the data system. At startup of the data system, the encrypted metadata may be decrypted and an unencrypted copy of the metadata may be cached in memory for use by the data system software. If the decrypted metadata is modified, then the encrypted metadata may be replaced with an encrypted version of the modified metadata. Format(s) of the metadata that is encrypted may be copyrighted.
    • 用于保护文件系统,卷管理器,数据库和备份系统等数据系统的系统和方法。 在实施例中,不是加密数据系统的数据,而是可以加密元数据的一个或多个元素或级别。 一些实施例可以加密不被频繁访问的元数据,以最小化加密和解密的成本。 或者,代替加密整个元数据,可以只加密元数据的一部分,例如头块。 加密的元数据可以存储在数据系统中。 在数据系统启动时,加密的元数据可以被解密,并且元数据的未加密副本可以被高速缓存在存储器中以供数据系统软件使用。 如果解密的元数据被修改,则加密的元数据可以被修改的元数据的加密版本替换。 加密的元数据的格式可能受版权保护。