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21. 发明授权

US08285967B1 Method for on-demand block map generation for direct mapped LUN 有权
标题翻译：用于直接映射LUN的按需块映射生成方法
公开(公告)号：US08285967B1
公开(公告)日：2012-10-09
申请号：US12494688
申请日：2009-06-30
申请人： Sairam Veeraswamy , Morgan A. Clark
发明人： Sairam Veeraswamy , Morgan A. Clark
IPC分类号： G06F12/00 , G06F9/26 , G06F9/34 , G06F17/30
CPC分类号： G06F17/30091 , G06F17/30203
摘要： This invention is a system and a method for operating a storage server in a data network using a new architecture. The method of creating the partial block map allows the snapshot writes on a direct mapped file. The method of reading data or writing data to the file created in direct mapping state and later converted to partial mapping state responsive to a copy on first write request by a client allocates new indirect block when needed to store the reference to newly allocated data block. The method of reading data from or writing data to the file in partial mapping state involves checking the mapping bit to find if the indirect block is in direct mapping state.
摘要翻译：本发明是使用新架构在数据网络中操作存储服务器的系统和方法。创建部分块映射的方法允许在直接映射文件上进行快照写入。在由直接映射状态创建的文件中读取数据或将数据写入数据的方法随后由客户端响应于第一次写入请求时的副本而被转换成部分映射状态，当需要存储对新分配的数据块的引用时，分配新的间接块。在部分映射状态下从数据读取数据或向文件写入数据的方法包括检查映射位以查找间接块是否处于直接映射状态。

22. 发明授权

US08250035B1 Methods and apparatus for creating a branch file in a file system 有权
标题翻译：在文件系统中创建分支文件的方法和装置
公开(公告)号：US08250035B1
公开(公告)日：2012-08-21
申请号：US12241743
申请日：2008-09-30
申请人： Hongliang Tang , Sairam Veeraswamy , Peter Bixby
发明人： Hongliang Tang , Sairam Veeraswamy , Peter Bixby
IPC分类号： G06F7/00 , G06F17/00 , G06F12/00 , G06F13/00
CPC分类号： G06F17/30088
摘要： Embodiments of the invention relate to maintaining reference counts in a file system to track when a block is available to be freed. When a snapshot copy of a file is created, rather than copying all the blocks of the file for the snapshot copy, the snapshot inode is given pointers to the blocks of the file. Rather than updating the reference counts for all these blocks to indicate that they are now in use by more than one file, the update of reference counts for at least some of these blocks may be deferred until a later time.
摘要翻译：本发明的实施例涉及在文件系统中维护引用计数以跟踪块何时可以被释放。当创建文件的快照副本时，而不是复制快照副本的文件的所有块，快照inode将指向文件块。不是更新所有这些块的引用计数，以指示它们现在被多个文件使用，所以至少这些块中的一些的引用计数的更新可以推迟到更晚的时间。

23. 发明授权

US07653612B1 Data protection services offload using shallow files 有权
标题翻译：数据保护服务使用浅文件卸载
公开(公告)号：US07653612B1
公开(公告)日：2010-01-26
申请号：US11692881
申请日：2007-03-28
申请人： Sairam Veeraswamy , Sorin Faibish
发明人： Sairam Veeraswamy , Sorin Faibish
IPC分类号： G06F17/30
CPC分类号： G06F17/30171 , Y10S707/99931
摘要： A shallow file is adapted for intensive read-only access to data of a primary file. The primary file resides in another file system or file server. The shallow file includes the data block mapping metadata of the primary file and a link to the primary file. To open the shallow file, the file system manager of the shallow file obtains a read lock on the primary file from the file system manager of the primary file. Then the file system manager of the shallow file may use the data block mapping in the shallow file to access the file data from the primary file in storage without participation of the file system manager of the primary file. This permits offloading of data protection services for secure and efficient storage of a backup copy of the file data.
摘要翻译：浅文件适用于对主文件的数据进行强读取访问。主文件位于另一个文件系统或文件服务器中。浅文件包括数据块映射主文件的元数据和到主文件的链接。要打开浅文件，浅文件的文件系统管理器从主文件的文件系统管理器获取主文件上的读锁定。然后浅文件的文件系统管理器可以使用浅文件中的数据块映射来访问存储中的主文件的文件数据，而不需要主文件的文件系统管理器的参与。这允许卸载数据保护服务，以安全和高效地存储文件数据的备份副本。

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