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    • 62. 发明申请
    • COMPRESSION ANALYZER
    • 压缩分析仪
    • US20100281079A1
    • 2010-11-04
    • US12769508
    • 2010-04-28
    • Vineet MarwahVikram KapoorAmit GaneshJesse KampSachin KulkarniRoger MacnicolKam ShergillManosiz Bhattacharyya
    • Vineet MarwahVikram KapoorAmit GaneshJesse KampSachin KulkarniRoger MacnicolKam ShergillManosiz Bhattacharyya
    • G06F17/30
    • H03M7/30G06F17/30595
    • Techniques are described herein for automatically selecting the compression techniques to be used on tabular data. A compression analyzer gives users high-level control over the selection process without requiring the user to know details about the specific compression techniques that are available to the compression analyzer. Users are able to specify, for a given set of data, a “balance point” along the spectrum between “maximum performance” and “maximum compression”. The point thus selected is used by the compression analyzer in a variety of ways. For example, in one embodiment, the compression analyzer uses the user-specified balance point to determine which of the available compression techniques qualify as “candidate techniques” for the given set of data. The compression analyzer selects the compression technique to use on a set of data by actually testing the candidate compression techniques against samples from the set of data. After testing the candidate compression techniques against the samples, the resulting compression ratios are compared. The compression technique to use on the set of data is then selected based, in part, on the compression ratios achieved during the compression tests performed on the sample data.
    • 这里描述了用于自动选择要在表格数据上使用的压缩技术的技术。 压缩分析仪为用户提供了对选择过程的高级控制,而不需要用户了解有关压缩分析器可用的特定压缩技术的细节。 用户可以为给定的数据集指定沿“最大性能”和“最大压缩”之间的“平衡点”。 所选择的点由压缩分析器以各种方式使用。 例如,在一个实施例中,压缩分析器使用用户指定的平衡点来确定哪个可用的压缩技术符合给定的数据集合的“候选技术”。 压缩分析仪通过对来自该组数据的样本实际测试候选压缩技术来选择对一组数据使用的压缩技术。 在针对样品测试候选压缩技术之后,比较所得到的压缩比。 然后,部分地基于在对样本数据执行的压缩测试期间实现的压缩比来选择在该组数据上使用的压缩技术。
    • 63. 发明授权
    • Supporting replication among a plurality of file operation servers
    • 支持多个文件操作服务器之间的复制
    • US07409397B2
    • 2008-08-05
    • US11172674
    • 2005-06-30
    • Namit JainSyam PannalaSam IdiculaNipun AgarwalEric SedlarVikram Kapoor
    • Namit JainSyam PannalaSam IdiculaNipun AgarwalEric SedlarVikram Kapoor
    • G06F17/30
    • G06F17/30171G06F17/30233Y10S707/99931Y10S707/99942Y10S707/99943
    • A method and apparatus for performing network file system (NFS) operations across a plurality of servers is provided. At a first server, a filehandle for a particular file is generated based, at least in part, on an identifier that uniquely identifies the particular file relative to all other files within a file system repository. The file system repository may be implemented in a database. The identifier may also be stored in the database. The first server sends a client the filehandle. The client may thereafter send another request for the performance of a file operation, containing the filehandle, to a different server. The second server may read the filehandle and use the identifier to locate the file within the repository against which to perform the file operation without receiving, from the first server, information that associates the filehandle with the file.
    • 提供了一种用于在多个服务器上执行网络文件系统(NFS)操作的方法和装置。 在第一服务器上,至少部分地基于唯一地标识特定文件相对于文件系统存储库内的所有其他文件的标识符生成特定文件的文件句柄。 文件系统存储库可以在数据库中实现。 标识符也可以存储在数据库中。 第一台服务器向客户端发送文件句柄。 然后,客户端可以向包含文件句柄的文件操作执行另一请求,到不同的服务器。 第二服务器可以读取文件句柄并且使用标识符来定位要在其中执行文件操作的存储库内的文件,而不从第一服务器接收将文件句柄与该文件相关联的信息。
    • 66. 发明申请
    • Sharing state information among a plurality of file operation servers
    • 在多个文件操作服务器间共享状态信息
    • US20070005603A1
    • 2007-01-04
    • US11172472
    • 2005-06-29
    • Namit JainSyam PannalaSam IdiculaNipun AgarwalEric SedlarVikram Kapoor
    • Namit JainSyam PannalaSam IdiculaNipun AgarwalEric SedlarVikram Kapoor
    • G06F17/30
    • G06F17/30171G06F17/30233Y10S707/99931Y10S707/99942Y10S707/99943
    • A method and apparatus for sharing state information among a plurality of servers is provided. A first server receives a request to perform a file operation, such as a NFS file system operation. Thereafter, the first server updates state information to reflect a change in state associated with processing the request. The first server then causes state update information, which identifies the change in state that was made at the first server, to be propagated to a second server. The second server updates state information, stored at the second server, to reflect the change in state associated with processing the request at the first server. Advantageously, a client may send a series of stateful file operations to either the first server or the second server, even if processing any one of the stateful file operation requests requires knowledge of the state of processing prior requests in the series of requests.
    • 提供了一种用于在多个服务器之间共享状态信息的方法和装置。 第一服务器接收执行诸如NFS文件系统操作之类的文件操作的请求。 此后,第一服务器更新状态信息以反映与处理请求相关联的状态变化。 然后,第一服务器导致状态更新信息,其标识在第一服务器处进行的状态的改变,以被传播到第二服务器。 第二服务器更新存储在第二服务器处的状态信息,以反映与在第一服务器处理请求相关联的状态变化。 有利地,客户机可以向第一服务器或第二服务器发送一系列有状态的文件操作,即使处理有状态文件操作请求中的任何一个需要知道在一系列请求中处理先前请求的状态。