Buffer allocation method supporting detection-based and avoidance-based consistency maintenance policies in a shared disk-based multi-database management system
    1.
    发明授权
    Buffer allocation method supporting detection-based and avoidance-based consistency maintenance policies in a shared disk-based multi-database management system 失效
    在基于共享磁盘的多数据库管理系统中支持基于检测和基于避免的一致性维护策略的缓冲区分配方法

    公开(公告)号:US07174417B2

    公开(公告)日:2007-02-06

    申请号:US10706933

    申请日:2003-11-14

    IPC分类号: G06F12/00

    CPC分类号: G06F12/0815

    摘要: A cache consistency maintenance procedure to select one of a detection-based cache consistency maintenance procedure optimized for record-based locking and an avoidance-based consistency-based maintenance procedure optimized for table and block-based locking. To support the characteristic of DBMS in which table locking and record locking are consistent to access the same table, the two kinds of the consistency maintenance policies for the same block are processed by a single buffer load process and the two kinds of the consistency maintenance policies are consistent with each other to provide better configuration and performance.

    摘要翻译: 缓存一致性维护程序,用于选择针对基于记录的锁定优化的基于检测的缓存一致性维护过程之一,以及针对基于表和块的锁定优化的基于回避的基于一致性的维护过程。 为了支持DBMS的特征,表锁定和记录锁定与访问相同的表一致,同一块的两种一致性维护策略由单个缓冲区加载过程和两种一致性维护策略 相互一致,提供更好的配置和性能。

    File storage system, file storing method and file searching method therein
    2.
    发明授权
    File storage system, file storing method and file searching method therein 有权
    文件存储系统,文件存储方法和文件搜索方法

    公开(公告)号:US07933938B2

    公开(公告)日:2011-04-26

    申请号:US11860652

    申请日:2007-09-25

    IPC分类号: G06F12/00

    CPC分类号: G06F17/301 G06F17/30147

    摘要: A file storage system, a file storing method, and a file searching method. In the file storing method, a single file to be stored is classified into at least one or more objects, and the classified objects are classified into pages with a serial number. One storage device to record the file is selected among a plurality of storage devices connected through a network. One object is allocated to the selected storage device. Pages configuring the file of the object allocated to the selected storage device are stored. When all pages of the file are not stored, the remaining pages are stored by allocating new object to a new storage device. Metadata for managing information about the storage of the file is set. Accordingly, the file can be stored over several disks. In addition, the overall system performance can be increased by setting the file information in the object metadata simply using the least resources.

    摘要翻译: 文件存储系统,文件存储方法和文件搜索方法。 在文件存储方法中,要存储的单个文件被分类为至少一个或多个对象,分类对象被分类为具有序列号的页面。 在通过网络连接的多个存储装置中选择用于记录文件的一个存储装置。 一个对象被分配给所选择的存储设备。 存储配置分配给所选存储设备的对象的文件的页面。 当文件的所有页面都未被存储时,通过将新对象分配给新的存储设备来存储剩余的页面。 设置用于管理有关文件存储信息的元数据。 因此,文件可以存储在几个磁盘上。 此外,通过仅使用最少的资源将文件信息设置在对象元数据中,可以提高整个系统性能。

    Hot data management method based on hit counter
    4.
    发明授权
    Hot data management method based on hit counter 有权
    基于命中计数器的热数据管理方法

    公开(公告)号:US08126997B2

    公开(公告)日:2012-02-28

    申请号:US12507327

    申请日:2009-07-22

    IPC分类号: G06F15/173

    摘要: Provided is a hot data management method based on hit counter, which prevents loads from being concentrated on a specific data server due to hot data by efficiently managing the hot data in the asymmetric storage system. Each of data servers of an asymmetric storage system checks hit counter for data stored in the corresponding data server to maintain hit counter information on the data in a latest state. The data server transmits the hit counter information to a metadata server at predetermined intervals. The data server makes or deletes a copy of the data according to the determination of the metadata server whether the data is hot data.

    摘要翻译: 提供了一种基于命中计数器的热数据管理方法,其通过有效地管理非对称存储系统中的热数据来防止由于热数据而将负载集中在特定数据服务器上。 非对称存储系统的每个数据服务器对存储在相应数据服务器中的数据检查命中计数器,以在最新状态下维护关于数据的命中计数器信息。 数据服务器以预定间隔将命中计数器信息发送到元数据服务器。 数据服务器根据元数据服务器确定数据是否为热数据,创建或删除数据副本。

    Apparatus, system and method for recovering meta data using fragmentary information
    5.
    发明授权
    Apparatus, system and method for recovering meta data using fragmentary information 有权
    使用零碎信息恢复元数据的装置,系统和方法

    公开(公告)号:US08606759B2

    公开(公告)日:2013-12-10

    申请号:US13192343

    申请日:2011-07-27

    IPC分类号: G06F7/00

    摘要: Disclosed are an apparatus, a system, and a method for recovering meta data using fragmentary information. The system for recovering meta data includes: a data server storing recovery information for recovering at least one data file and meta data related to each of the data file; and a meta data server storing the meta data related to the data files and receiving the recovery information from the data server when the meta data are lost to recover the lost meta data. By this configuration, the exemplary embodiment of the present invention stably can the lost meta data of the meta data server by using the recovery the meta data and prevent the phenomenon that the meta data collides with each other on the same directory hierarchical structure.

    摘要翻译: 公开了一种使用零碎信息来恢复元数据的装置,系统和方法。 用于恢复元数据的系统包括:数据服务器,存储用于恢复至少一个数据文件的恢复信息和与每个数据文件有关的元数据; 以及元数据服务器,存储与数据文件相关的元数据,并且当元数据丢失时从数据服务器接收恢复信息以恢复丢失的元数据。 通过该配置,本发明的示例性实施例通过使用恢复元数据来稳定地保留元数据服务器的丢失元数据,并且防止元数据在相同目录分层结构上彼此冲突的现象。

    Method of calculating parity in asymetric clustering file system
    6.
    发明授权
    Method of calculating parity in asymetric clustering file system 有权
    计算非对称聚类文件系统中奇偶校验的方法

    公开(公告)号:US08972779B2

    公开(公告)日:2015-03-03

    申请号:US13309752

    申请日:2011-12-02

    IPC分类号: G06F11/00 G06F11/10

    摘要: Disclosed is a method of calculating parity. The method dividing, by a client system, a file which is to be stored into chunks of a preset size and distributively storing the chunks in a plurality of data servers; sending, by the client system, a data write complete notification message to a metadata server; storing, by the metadata server, a file sent through the data write complete notification message in a recovery queue; and sending, by the metadata server, a random data server a parity calculation request for the file stored in the recovery queue.

    摘要翻译: 公开了一种计算奇偶校验的方法。 该方法由客户端系统划分要被存储为预定大小的块并将多个数据分组存储在多个数据服务器中的文件; 由客户端系统向元数据服务器发送数据写入完成通知消息; 由元数据服务器将通过数据写入完成通知消息发送的文件存储在恢复队列中; 并且由元数据服务器向随机数据服务器发送存储在恢复队列中的文件的奇偶校验计算请求。

    HOT DATA MANAGEMENT METHOD BASED ON HIT COUNTER
    7.
    发明申请
    HOT DATA MANAGEMENT METHOD BASED ON HIT COUNTER 有权
    基于HIT计数器的热数据管理方法

    公开(公告)号:US20100161780A1

    公开(公告)日:2010-06-24

    申请号:US12507327

    申请日:2009-07-22

    IPC分类号: G06F15/173

    摘要: Provided is a hot data management method based on hit counter, which prevents loads from being concentrated on a specific data server due to hot data by efficiently managing the hot data in the asymmetric storage system. Each of data servers of an asymmetric storage system checks hit counter for data stored in the corresponding data server to maintain hit counter information on the data in a latest state. The data server transmits the hit counter information to a metadata server at predetermined intervals. The data server makes or deletes a copy of the data according to the determination of the metadata server whether the data is hot data.

    摘要翻译: 提供了一种基于命中计数器的热数据管理方法,其通过有效地管理非对称存储系统中的热数据来防止由于热数据而将负载集中在特定数据服务器上。 非对称存储系统的每个数据服务器对存储在相应数据服务器中的数据检查命中计数器,以在最新状态下维护关于数据的命中计数器信息。 数据服务器以预定间隔将命中计数器信息发送到元数据服务器。 数据服务器根据元数据服务器确定数据是否为热数据,创建或删除数据副本。