公开(公告)号：JP2009059374A

公开(公告)日：2009-03-19

申请号：JP2008242286

申请日：2008-09-22

Applicant: Internatl Business Mach Corp ,  インターナショナル・ビジネス・マシーンズ・コーポレーションInternational Business Maschines Corporation

Inventor： ANANTHANARAYANAN RAJAGOPAL ,  BECKER-SZENDY RALPH A ,  REES ROBERT M ,  BURNS RANDAL C ,  LONG DARRELL D E ,  JUJJURI VENKATESWARARAO ,  WOLFE DAVID M ,  YOUNG JASON C

IPC: G06F12/00 ,  G06F3/06 ,  G06F12/10 ,  G06F13/10

CPC classification number: G06F3/0613 ,  G06F3/0643 ,  G06F3/0656 ,  G06F3/067 ,  G06F12/10

Abstract: PROBLEM TO BE SOLVED: To provide various copy-on-write execution forms in computing environment. SOLUTION: These execution forms include: the use of a reading mapping table to execute a first virtual block-physical block mapping to be used to read blocks of data in the file to be copied-on-write from a physical storage device for correction; and the use of different write mapping tables to execute a second virtual block-physical block mapping to be used to write the block having corrected file data into the physical storage device. Here, the copy-on-write operation of block of data is achieved by using single write operation. In another embodiment, distributed copy-on-write operation of a file in client-server environment is presented. COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 要解决的问题：在计算环境中提供各种写时复制执行形式。 解决方案：这些执行形式包括：使用读取映射表来执行第一虚拟块 - 物理块映射，以用于从物理存储设备读写要复制的文件中的数据块 纠正 以及使用不同的写入映射表来执行用于将具有校正的文件数据的块写入物理存储设备的第二虚拟块 - 物理块映射。 这里，通过使用单个写入操作来实现数据块的写时复制操作。 在另一个实施例中，呈现了客户机 - 服务器环境中的文件的分布式写时拷贝操作。 版权所有（C）2009，JPO＆INPIT

公开(公告)号：JP2004326801A

公开(公告)日：2004-11-18

申请号：JP2004129471

申请日：2004-04-26

Applicant: Internatl Business Mach Corp ,  インターナショナル・ビジネス・マシーンズ・コーポレーションInternational Business Maschines Corporation

Inventor： ANANTHANARAYANAN RAJAGOPAL ,  BECKER-SZENDY RALPH A ,  REES ROBERT M ,  BURNS RANDAL C ,  LONG DARRELL D E ,  JUJJURI VENKATESWARARAO ,  WOLFE DAVID M ,  YOUNG JASON C

IPC: G06F3/06 ,  G06F12/00 ,  G06F12/10

CPC classification number: G06F3/0613 ,  G06F3/0643 ,  G06F3/0656 ,  G06F3/067 ,  G06F12/10

Abstract: PROBLEM TO BE SOLVED: To present various copy on writing embodiments in a computing environment. SOLUTION: In this system, a certain copy on writing embodiment includes using a reading mapping table in order to execute first virtual block-physical block mapping to be used to read a data block of the file that is subjected to copy on writing from a physical storage device for correction and using a different writing mapping table in order to execute second virtual block-physical block mapping to be used to write a block with corrected file data to the physical storage device. In this case, copy on writing for the data block is accomplished by using a single writing operation. COPYRIGHT: (C)2005,JPO&NCIPI

Abstract translation: 要解决的问题：在计算环境中呈现写入实施例的各种副本。 解决方案：在该系统中，写入实施例的某个副本包括使用读取映射表来执行第一虚拟块 - 物理块映射以用于读取写入时复制的文件的数据块 从用于校正的物理存储设备和使用不同的写入映射表，以便执行第二虚拟块 - 物理块映射以用于将具有校正的文件数据的块写入物理存储设备。 在这种情况下，通过使用单个写入操作来完成数据块的写入复制。 版权所有（C）2005，JPO＆NCIPI

公开(公告)号：JP2004326800A

公开(公告)日：2004-11-18

申请号：JP2004129396

申请日：2004-04-26

Applicant: Internatl Business Mach Corp ,  インターナショナル・ビジネス・マシーンズ・コーポレーションInternational Business Maschines Corporation

Inventor： YOUNG JASON C ,  ANANTHANARAYANAN RAJAGOPAL ,  BURNS RANDAL C ,  LONG DARRELL D E ,  REES ROBERT M ,  BECKER-SZENDY RALPH A ,  SEEGER JAMES J ,  WOLFE DAVID M

IPC: G06F12/00 ,  G06F17/30

CPC classification number: G06F17/30067 ,  Y10S707/959 ,  Y10S707/99953 ,  Y10S707/99955

Abstract: PROBLEM TO BE SOLVED: To provide a system and a method for managing logical versions of a file system made through a near-instantaneous copy process. SOLUTION: Each logical version of the file system, including a primary version, is assigned a unique epoch number or other identifying value, and each file system object is assigned two epoch numbers that define a space of logical versions for which the object exists. A list of all valid epoch numbers are maintained in a version table. The near-instantaneous creation of a logical version of the file system requires inserting a unique epoch number entry in the version table and the next epoch number to the new logical version. An original state of the system is preserved through the use of a copy-on-write procedure for file system objects that are reference by that logical version of file system. Accordingly, new logical versions of file systems are maintained and original states of previous states of the logical versions of file systems are preserved. COPYRIGHT: (C)2005,JPO&NCIPI

公开(公告)号：SG143036A1

公开(公告)日：2008-06-27

申请号：SG2004018016

申请日：2004-03-30

Applicant: IBM

Inventor： YOUNG JASON C ,  ANANTHANARAYANAN RAJAGOPAL ,  BURNS RANDAL C ,  LONG DARRELL D E ,  REES ROBERT M ,  BECKER-SZENDY RALPH A ,  SEEGER JAMES J

IPC: G06F17/30 ,  G06F12/00

Abstract: Managing Filesystem Versions A system and method for managing logical versions of a fdesystem made through a near-instantaneous copy process is provided. Each logical version of the filesystem, including the primary version, is assigned a unique epoch number or other identifying value, and each filesystem object is assigned two epoch numbers that define the space of logical versions for which the object exists. A list of all valid epoch numbers are maintained in a version table. The near-instantaneous creation of a logical version of the filesystem requires inserting a unique epoch number entry in the version table (106) and the next epoch number to the new logical version. An original state of the system is preserved through the use of a copy-on-write procedure for filesystem objects that are reference by that logical filesystem version (120). Accordingly, filesystem versions are maintained and original states of previous states of the logical filesystem versions are preserved.