公开(公告)号：WO2007126513A3

公开(公告)日：2007-11-08

申请号：PCT/US2007/005048

申请日：2007-02-26

Applicant: NETWORK APPLIANCE, INC.

Inventor： GOLE, Abhijeet ,  SARMA, Joydeep, Sen

IPC: G06F12/00

Abstract: A filer converts a traditional volume to a flexible volume by: creating an aggregate on storage devices other than the storage devices of the traditional volume; on the aggregate, creating a flexible volume large enough to store metadata describing files residing on the traditional volume; on the flexible volume, creating metadata structures that describe the files of the traditional volume, except that the metadata indicates that data blocks and indirect blocks are absent and must be fetched from another location. As the filer handles I/O requests directed to the flexible volume, the filer calculates physical volume block number (PVBN) addresses where the requested blocks would be located in the aggregate and replaces the absent pointers with the calculated addresses. After the absent pointers have been replaced, the filer adds the storage devices of the traditional volume.

公开(公告)号：WO2007053321A3

公开(公告)日：2007-05-10

申请号：PCT/US2006/040851

申请日：2006-10-18

Applicant: NETWORK APPLIANCE, INC.

Inventor： GOLE, Abhijeet ,  HAMILTON, Eric

IPC: G06F17/30

Abstract: A method and system mirror flexible volumes in a circular or bi-directional configuration, without creating a deadlock. A source filer maintains a number of log files on a destination filer, where the number of log files is greater than or equal to the number of cache flush operations the primary filer performs between cache flush operations on the destination filer. The source filer can create the log files in advance. Alternatively or in addition, the source filer can create the log files as needed, i.e., the source filer can create a log file when the source filer flushes its cache. Once the destination filer flushes its cache, the log files created prior to the destination filer cache flush can be deallocated or reused.

公开(公告)号：EP2013735A2

公开(公告)日：2009-01-14

申请号：EP07751782.9

申请日：2007-02-26

Applicant: Network Appliance, Inc.

Inventor： GOLE, Abhijeet ,  SARMA, Joydeep, Sen

IPC: G06F12/00

CPC classification number: G06F3/0665 ,  G06F3/0605 ,  G06F3/0608 ,  G06F3/0644 ,  G06F3/0683

Abstract: A filer converts a traditional volume to a flexible volume by: creating an aggregate on storage devices other than the storage devices of the traditional volume; on the aggregate, creating a flexible volume large enough to store metadata describing files residing on the traditional volume; on the flexible volume, creating metadata structures that describe the files of the traditional volume, except that the metadata indicates that data blocks and indirect blocks are absent and must be fetched from another location. As the filer handles I/O requests directed to the flexible volume, the filer calculates physical volume block number (PVBN) addresses where the requested blocks would be located in the aggregate and replaces the absent pointers with the calculated addresses. After the absent pointers have been replaced, the filer adds the storage devices of the traditional volume.

公开(公告)号：EP1955208B1

公开(公告)日：2011-09-07

申请号：EP06817161.0

申请日：2006-10-18

Applicant: NETWORK APPLIANCE, INC.

Inventor： GOLE, Abhijeet ,  HAMILTON, Eric

IPC: G06F11/14 ,  G06F11/20 ,  G06F17/30

CPC classification number: G06F11/2079 ,  G06F11/1471 ,  G06F11/2074 ,  Y10S707/99955

Abstract: A method and system mirror flexible volumes in a circular or bi-directional configuration, without creating a deadlock. A source filer maintains a number of log files on a destination filer, where the number of log files is greater than or equal to the number of cache flush operations the primary filer performs between cache flush operations on the destination filer. The source filer can create the log files in advance. Alternatively or in addition, the source filer can create the log files as needed, i.e., the source filer can create a log file when the source filer flushes its cache. Once the destination filer flushes its cache, the log files created prior to the destination filer cache flush can be deallocated or reused.

公开(公告)号：EP1955208A2

公开(公告)日：2008-08-13

申请号：EP06817161.0

申请日：2006-10-18

Applicant: NETWORK APPLIANCE, INC.

Inventor： GOLE, Abhijeet ,  HAMILTON, Eric

IPC: G06F17/30

CPC classification number: G06F11/2079 ,  G06F11/1471 ,  G06F11/2074 ,  Y10S707/99955

Abstract: A method and system mirror flexible volumes in a circular or bi-directional configuration, without creating a deadlock. A source filer maintains a number of log files on a destination filer, where the number of log files is greater than or equal to the number of cache flush operations the primary filer performs between cache flush operations on the destination filer. The source filer can create the log files in advance. Alternatively or in addition, the source filer can create the log files as needed, i.e., the source filer can create a log file when the source filer flushes its cache. Once the destination filer flushes its cache, the log files created prior to the destination filer cache flush can be deallocated or reused.