Apparatus and method for accessing a metadata
    1.
    发明授权
    Apparatus and method for accessing a metadata 有权
    用于访问元数据的装置和方法

    公开(公告)号:US08489698B2

    公开(公告)日:2013-07-16

    申请号:US12968980

    申请日:2010-12-15

    IPC分类号: G06F15/16 G06F7/00

    CPC分类号: G06F9/52

    摘要: Provided are an apparatus and a method for acquiring a consistent result even if one client accesses any metadata server in a circumstance that the cluster configuring many metadata servers exist. The apparatus as mentioned above includes a deletion file list unit that stores information about a deleted metadata during a predetermined period; and a metadata server selector that selects a metadata server to receive a operation request about a metadata among a plurality of metadata servers based on information from the deletion file list unit.

    摘要翻译: 提供一种用于获得一致结果的装置和方法,即使在存在配置许多元数据服务器的集群的情况下,一个客户端访问任何元数据服务器。 如上所述的装置包括删除文件列表单元,其在预定时段期间存储关于被删除的元数据的信息; 以及元数据服务器选择器,其基于来自删除文件列表单元的信息,选择元数据服务器以接收关于多个元数据服务器之间的元数据的操作请求。

    APPARATUS AND METHOD FOR ACCESSING A METADATA
    2.
    发明申请
    APPARATUS AND METHOD FOR ACCESSING A METADATA 有权
    用于访问元数据的装置和方法

    公开(公告)号:US20110153769A1

    公开(公告)日:2011-06-23

    申请号:US12968980

    申请日:2010-12-15

    IPC分类号: G06F15/16

    CPC分类号: G06F9/52

    摘要: Provided are an apparatus and a method for acquiring a consistent result even if one client accesses any metadata server in a circumstance that the cluster configuring many metadata servers exist. The apparatus as mentioned above includes a deletion file list unit that stores information about a deleted metadata during a predetermined period; and a metadata server selector that selects a metadata server to receive a operation request about a metadata among a plurality of metadata servers based on information from the deletion file list unit.

    摘要翻译: 提供一种用于获得一致结果的装置和方法,即使在存在配置许多元数据服务器的集群的情况下,一个客户端访问任何元数据服务器。 如上所述的装置包括删除文件列表单元,其在预定时段期间存储关于被删除的元数据的信息; 以及元数据服务器选择器,其基于来自删除文件列表单元的信息,选择元数据服务器以接收关于多个元数据服务器之间的元数据的操作请求。

    Method and system for managing file metadata transparent about address changes of data servers and movements of their disks
    3.
    发明授权
    Method and system for managing file metadata transparent about address changes of data servers and movements of their disks 有权
    用于管理文件元数据的方法和系统对于数据服务器的地址更改和其磁盘的移动是透明的

    公开(公告)号:US08046345B2

    公开(公告)日:2011-10-25

    申请号:US12177635

    申请日:2008-07-22

    IPC分类号: G06F7/00 G06F17/30

    CPC分类号: G06F17/301

    摘要: Provided are a method and a system for managing a file metadata, which are independent of a address change of a data server and movements of a disk by using a location of disk where data exists actually as a location information of a file data. The method for managing the file metadata includes determining whether the request of the metadata is valid, verifying information of a disk storing a file data corresponding to the metadata and a data server address in which the file data exists, and transmitting the verified address of the data server to the client. According to the method and the system for managing the file metadata, data services can be continuously provided without modifications of a file metadata even if the data server address is changed.

    摘要翻译: 提供了一种用于管理文件元数据的方法和系统,其独立于数据服务器的地址变化和通过使用其中数据实际存在的盘的位置的磁盘的移动作为文件数据的位置信息。 用于管理文件元数据的方法包括确定元数据的请求是否有效,验证存储与元数据相对应的文件数据的盘的信息以及存在该文件数据的数据服务器地址,以及发送 数据服务器到客户端。 根据用于管理文件元数据的方法和系统,即使数据服务器地址被改变,也可以连续地提供数据服务而不修改文件元数据。

    METHOD AND SYSTEM FOR MANAGING FILE METADATA TRANSPARENT ABOUT ADDRESS CHANGES OF DATA SERVERS AND MOVEMENTS OF THEIR DISKS
    4.
    发明申请
    METHOD AND SYSTEM FOR MANAGING FILE METADATA TRANSPARENT ABOUT ADDRESS CHANGES OF DATA SERVERS AND MOVEMENTS OF THEIR DISKS 有权
    管理文件元数据的方法和系统关于数据服务器的地址变化及其磁盘的移动

    公开(公告)号:US20090157694A1

    公开(公告)日:2009-06-18

    申请号:US12177635

    申请日:2008-07-22

    IPC分类号: G06F17/30 G06F12/00

    CPC分类号: G06F17/301

    摘要: Provided are a method and a system for managing a file metadata, which are independent of a address change of a data server and movements of a disk by using a location of disk where data exists actually as a location information of a file data. The method for managing the file metadata includes determining whether the request of the metadata is valid, verifying information of a disk storing a file data corresponding to the metadata and a data server address in which the file data exists, and transmitting the verified address of the data server to the client. According to the method and the system for managing the file metadata, data services can be continuously provided without modifications of a file metadata even if the data server address is changed.

    摘要翻译: 提供了一种用于管理文件元数据的方法和系统,其独立于数据服务器的地址变化和通过使用其中数据实际存在的盘的位置的磁盘的移动作为文件数据的位置信息。 用于管理文件元数据的方法包括确定元数据的请求是否有效,验证存储与元数据相对应的文件数据的盘的信息以及存在该文件数据的数据服务器地址,以及发送 数据服务器到客户端。 根据用于管理文件元数据的方法和系统,即使数据服务器地址被改变,也可以连续地提供数据服务而不修改文件元数据。

    Method for file deletion and recovery against system failures in database management system
    5.
    发明授权
    Method for file deletion and recovery against system failures in database management system 有权
    数据库管理系统中系统故障的文件删除和恢复方法

    公开(公告)号:US06944635B2

    公开(公告)日:2005-09-13

    申请号:US10175098

    申请日:2002-06-20

    摘要: A method for file deletion and recovery against system failures in a database management system comprising steps of deleting files listed in a pending action list during a transaction commit process, writing a non-atomic file deletion as an atomic operation into a log and recovering uncompleted file deletion during restart recovery by using the log is disclosed. When system failures occur during file deletion in a database management system, resources of which releasing is interrupted by failures are released perfectly through recovery step, so it is advantageous in that coherency of data is maintained and efficiency of storage device arises.

    摘要翻译: 一种用于在数据库管理系统中针对系统故障的文件删除和恢复的方法,包括以下步骤:在事务提交过程期间删除待处理动作列表中列出的文件,将非原子文件删除作为原子操作写入日志并恢复未完成的文件 公开了通过使用日志重启恢复期间的删除。 当在数据库管理系统中的文件删除期间发生系统故障时,通过恢复步骤完全释放其中释放被故障中断的资源,因此有利的是保持数据的一致性并产生存储设备的效率。