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    • 2. 发明申请
    • Crash recovery system and method for distributed file server using object based storage
    • 使用基于对象的存储的分布式文件服务器的崩溃恢复系统和方法
    • US20060129614A1
    • 2006-06-15
    • US11231158
    • 2005-09-20
    • Hong KimKi JinYoung KimYoung KimMi LeeMyung Kim
    • Hong KimKi JinYoung KimYoung KimMi LeeMyung Kim
    • G06F17/30
    • G06F11/1435G06F11/1448G06F11/1451G06F11/1464G06F11/1469
    • A crash recovery system and method for distributed file server using object based storage are provided. The system includes: a client for accessing a file system using an object-based storage device (OSDFS), transmitting a command to an object-based storage device (OSD) and accessing a metadata server (MDS); a network for providing an interface and transferring data between the client, the metadata server and the object-based storage device; an object-based storage device for analyzing the command from the client and performing corresponding operations of the command; and a metadata server for storing and managing metadata controlling a direct access to a predetermined file from the client to the object based storage device in order to provide the metadata to the client, and checking and recovering a consistency of the stored and managed metadata when the OSDFS is malfunctioned.
    • 提供了一种使用基于对象的存储的分布式文件服务器的崩溃恢复系统和方法。 该系统包括:用于使用基于对象的存储设备(OSDFS)访问文件系统的客户机,向基于对象的存储设备(OSD)发送命令并访问元数据服务器(MDS); 用于提供接口并在客户端,元数据服务器和基于对象的存储设备之间传送数据的网络; 基于对象的存储装置,用于分析来自客户机的命令并执行命令的相应操作; 以及用于存储和管理元数据的元数据服务器,其控制从客户机到基于对象的存储设备直接访问预定文件,以便向客户端提供元数据,以及当存储和管理的元数据的一致性时 OSDFS发生故障。
    • 5. 发明申请
    • Microprocessor suitable for constructing multi-processor system and method for controlling reset and processor ID thereof
    • 适用于构造多处理器系统的微处理器及其复位控制方法及其处理器ID
    • US20070136567A1
    • 2007-06-14
    • US11633811
    • 2006-12-05
    • Young KimSung KimKyoung ParkSeong KimMyung Kim
    • Young KimSung KimKyoung ParkSeong KimMyung Kim
    • G06F15/177
    • G06F15/02G06F15/16
    • Provided are a microprocessor suitable for constructing a multi-processor system and a method for controlling the reset and processor ID of the microprocessor. The microprocessor includes decoder receiving a reset ID having a predetermined binary value and a reset signal and decoding the reset ID, an ID generator receiving the decoding result of the decoder and generating at least one microprocessor ID and a reset ID of a microprocessor serially connected to the microprocessor, and a reset vector unit selecting a reset vector according to the decoding result of the decoder. The multi-processor system is constructed such that independent microprocessors of the system respectively generate their own reset vectors and processor IDs when a reset signal is input to the multi-processor system to initialize it. Thus, all the microprocessors of the system can be simultaneously started up when the reset signal is disabled. Accordingly, a resetting process in the multi-processor system is simplified, a period of time required for starting up the microprocessor is reduced, and the multi-processor system is easily designed.
    • 提供了适用于构造多处理器系统的微处理器和用于控制微处理器的复位和处理器ID的方法。 微处理器包括解码器,其接收具有预定二进制值的复位ID和复位信号,并对复位ID进行解码; ID生成器接收解码器的解码结果,并生成至少一个微处理器ID和与微处理器串行连接的微处理器的复位ID 微处理器和复位向量单元根据解码器的解码结果来选择复位向量。 多处理器系统被构造成使得当复位信号被输入到多处理器系统以初始化时,系统的独立微处理器分别产生它们自己的复位向量和处理器ID。 因此,当复位信号被禁止时,系统的所有微处理器都可以同时启动。 因此,简化了多处理器系统中的复位处理,减少了启动微处理器所需的时间,容易地设计多处理器系统。
    • 6. 发明申请
    • System and method of an efficient snapshot for shared large storage
    • 用于共享大型存储的高效快照的系统和方法
    • US20060206677A1
    • 2006-09-14
    • US11435921
    • 2006-05-18
    • Young KimDong KangYu BakChang KimBum ShinMyung Kim
    • Young KimDong KangYu BakChang KimBum ShinMyung Kim
    • G06F12/16
    • G06F11/1466G06F3/0611G06F3/0617G06F3/065G06F3/067
    • The present invention relates to an efficient snapshot technique based on a mapping for a large logical volume shared in multiple hosts. According to the present invention, problems of time delays in a conventional snapshot technique is solved by employing a FAB and an SSB, which are bits representing whether a COW operation is carried out to a mapping entry. In other words, the present invention solves the problems of delaying a write operation of corresponding volume, which is simultaneously executed when a snapshot is created, until the snapshot creation is completed. Further, in the write operation carried out after the snapshot creation, an operation of determining whether the COW operation is carried out is achieved by reading only an original mapping block by using the FAB and the SSB, without reading out the snapshot mapping block. Therefore, an additional disk access operation is decreased when carrying out a write operation to the volume in which the snapshot exists, thereby improving the performance of operation. Furthermore, in a snapshot destruction operation, the operation of determining whether the COW operation is carried out or not can be achieved without access to the snapshot mapping block, thereby preventing the degradation of performance. In case there is at least one snapshot, the determination operation can be achieved by an access to the original mapping block. Consequently, constant performance is always provided without the number of the snapshots.
    • 本发明涉及一种基于多个主机共享的大型逻辑卷映射的高效快照技术。 根据本发明,通过采用FAB和SSB来解决传统快照技术中的时间延迟问题,它们是表示是否对映射条目执行COW操作的位。 换句话说,本发明解决了在创建快照时同时执行的相应卷的写入操作的延迟的问题,直到快照创建完成为止。 此外,在快照创建之后执行的写入操作中,通过仅使用FAB和SSB仅读取原始映射块而不读出快照映射块来实现确定是否执行COW操作的操作。 因此,当对存在快照的卷执行写入操作时,额外的磁盘访问操作减少,从而提高了操作的性能。 此外,在快照销毁操作中,可以在不访问快照映射块的情况下实现确定是否执行COW操作的操作,从而防止性能下降。 在存在至少一个快照的情况下,可以通过访问原始映射块来实现确定操作。 因此,始终提供恒定的性能,而不需要快照的数量。