公开(公告)号：US08874864B2

公开(公告)日：2014-10-28

申请号：US14023117

申请日：2013-09-10

Applicant: NetApp, Inc.

Inventor： Peter Corbett ,  Michael Kazar

IPC: G06F12/00 ,  G06F17/30 ,  G06F13/00 ,  G06F13/28 ,  G06F11/14

CPC classification number: G06F17/30088 ,  G06F11/1435 ,  G06F11/1443 ,  G06F11/1446 ,  G06F12/00 ,  G06F13/00

Abstract: An on-disk structure of a file system has the capability to maintain snapshot and file system metadata on a storage system. The on-disk structure arranges file system data sequentially on disk within regions, wherein each region comprises a predetermined amount of disk space represented by blocks. The snapshot and file system metadata is maintained within level 1 (L1) indirect blocks of the on-disk structure. Each L1 indirect block describes (i.e., represents) a corresponding region of the on-disk structure of the file system; in the case of an active region, e.g., an L1 indirect block represents an active file data portion of a large file. The L1 indirect block that references an active region also performs file block number-to-disk block number mapping for the region.

Abstract translation: 文件系统的磁盘结构具有在存储系统上维护快照和文件系统元数据的功能。 磁盘结构将文件系统数据顺序地布置在区域内的盘上，其中每个区域包括由块表示的预定量的磁盘空间。 快照和文件系统元数据保持在磁盘结构的第1级（L1）间接块中。 每个L1间接块描述（即，表示）文件系统的盘上结构的相应区域; 在有源区域的情况下，例如，L1间接块表示大文件的活动文件数据部分。 引用活动区域的L1间接块也对该区域执行文件块号到磁盘块号映射。