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1. 发明授权

US07685169B2 Multiple concurrent active file systems 有权
标题翻译：多个并发活动文件系统
公开(公告)号：US07685169B2
公开(公告)日：2010-03-23
申请号：US11057409
申请日：2005-02-14
申请人： David Hitz , John Edwards , Blake Lewis
发明人： David Hitz , John Edwards , Blake Lewis
IPC分类号： G06F17/30
CPC分类号： G06F17/30067 , G06F2201/84 , Y10S707/99931 , Y10S707/99938 , Y10S707/99952 , Y10S707/99953
摘要： Maintenance of plural active file systems, wherein each of the active file systems initially access data shared with another of the active file systems, and wherein changes made to each of the active file systems are not reflected in other active file systems. When a second active file system is created based on a first active file system, the first active file system and the second active file system initially share data. When changes are made to the first active file system, modified data is recorded in the first active file system in a location that is not shared with the second active file system. When changes are made to the second active file system, modified data is recorded in the second active file system in a location that is not shared with the first active file system. Also, creation of the plural active file systems.
摘要翻译：维护多个活动文件系统，其中每个活动文件系统最初访问与另一个活动文件系统共享的数据，并且其中对每个活动文件系统所做的更改不会反映在其他活动文件系统中。当基于第一活动文件系统创建第二活动文件系统时，第一活动文件系统和第二活动文件系统最初共享数据。当对第一活动文件系统进行改变时，修改的数据被记录在不与第二活动文件系统共享的位置的第一活动文件系统中。当对第二活动文件系统进行改变时，修改的数据被记录在不与第一活动文件系统共享的位置的第二活动文件系统中。另外，创建多个活动文件系统。

2. 发明申请

US20050182799A1 Multiple concurrent active file systems 有权
标题翻译：多个并发活动文件系统
公开(公告)号：US20050182799A1
公开(公告)日：2005-08-18
申请号：US11057409
申请日：2005-02-14
申请人： David Hitz , John Edwards , Blake Lewis
发明人： David Hitz , John Edwards , Blake Lewis
IPC分类号： G06F12/00 , G06F17/30
CPC分类号： G06F17/30067 , G06F2201/84 , Y10S707/99931 , Y10S707/99938 , Y10S707/99952 , Y10S707/99953
摘要： Maintenance of plural active file systems, wherein each of the active file systems initially access data shared with another of the active file systems, and wherein changes made to each of the active file systems are not reflected in other active file systems. When a second active file system is created based on a first active file system, the first active file system and the second active file system initially share data. When changes are made to the first active file system, modified data is recorded in the first active file system in a location that is not shared with the second active file system. When changes are made to the second active file system, modified data is recorded in the second active file system in a location that is not shared with the first active file system. Also, creation of the plural active file systems.
摘要翻译：维护多个活动文件系统，其中每个活动文件系统最初访问与另一个活动文件系统共享的数据，并且其中对每个活动文件系统所做的更改不会反映在其他活动文件系统中。当基于第一活动文件系统创建第二活动文件系统时，第一活动文件系统和第二活动文件系统最初共享数据。当对第一活动文件系统进行改变时，修改的数据被记录在不与第二活动文件系统共享的位置的第一活动文件系统中。当对第二活动文件系统进行改变时，修改的数据被记录在不与第一活动文件系统共享的位置的第二活动文件系统中。另外，创建多个活动文件系统。

3. 发明申请

US20100138394A1 MULTIPLE CONCURRENT ACTIVE FILE SYSTEMS 有权
标题翻译：多个并发活动文件系统
公开(公告)号：US20100138394A1
公开(公告)日：2010-06-03
申请号：US12698223
申请日：2010-02-02
申请人： David Hitz , John Edwards , Blake Lewis
发明人： David Hitz , John Edwards , Blake Lewis
IPC分类号： G06F17/00 , G06F12/16
CPC分类号： G06F17/30067 , G06F2201/84 , Y10S707/99931 , Y10S707/99938 , Y10S707/99952 , Y10S707/99953
摘要： A method and apparatus for operating a data storage system is disclosed. An original active file system holds incoming write transactions. Data is written at a selected time to blocks in a data storage device of the original active file system, the data written to blocks which do not hold old data of the data storage system. Pointers to data of the original active file system are written at the selected time to the data storage device, the pointers written to blocks which do not hold old data of the data storage system, the pointers and a previously saved data of the active file system forming a consistency point of the original active file system at the selected time. A new active file system is started using the consistency point of the original active file system at the selected time.
摘要翻译：公开了一种用于操作数据存储系统的方法和装置。原始活动文件系统保存传入的写入事务。在选定的时间写入数据以在原始活动文件系统的数据存储装置中阻塞数据，该数据被写入不保存数据存储系统的旧数据的块。原始活动文件系统的数据指针在选定的时间被写入数据存储装置，指针写入不保存数据存储系统的旧数据的块，指针和活动文件系统之前保存的数据在选定的时间形成原始活动文件系统的一致性点。在所选择的时间，使用原始活动文件系统的一致性点启动新的活动文件系统。

4. 发明授权

US06857001B2 Multiple concurrent active file systems 失效
公开(公告)号：US06857001B2
公开(公告)日：2005-02-15
申请号：US10165188
申请日：2002-06-07
申请人： David Hitz , John Edwards , Blake Lewis
发明人： David Hitz , John Edwards , Blake Lewis
IPC分类号： G06F12/00 , G06F17/30
CPC分类号： G06F17/30067 , G06F2201/84 , Y10S707/99931 , Y10S707/99938 , Y10S707/99952 , Y10S707/99953
摘要： Maintenance of plural active file systems, wherein each of the active file systems initially access data shared with another of the active file systems, and wherein changes made to each of the active file systems are not reflected in other active file systems. When a second active file system is created based on a first active file system, the first active file system and the second active file system initially share data. When changes are made to the first active file system, modified data is recorded in the first active file system in a location that is not shared with the second active file system. When changes are made to the second active file system, modified data is recorded in the second active file system in a location that is not shared with the first active file system. Also, creation of the plural active file systems.

5. 发明申请

US20060184821A1 System and method for enabling a storage system to support multiple volume formats simultaneously 有权
公开(公告)号：US20060184821A1
公开(公告)日：2006-08-17
申请号：US11118455
申请日：2005-04-29
申请人： David Hitz , John Edwards
发明人： David Hitz , John Edwards
IPC分类号： G06F11/00
CPC分类号： G06F3/0689 , G06F3/0607 , G06F3/0643 , Y10S707/99956
摘要： A system and method enables a storage system to support multiple volume type simultaneously. A volume type field is contained within a file system information block that permits the storage system to determine the type of volume of a particular volume associated therewith. The storage operating system may then interpret various on-disk data structures in accordance with the appropriate volume type.

6. 发明授权

US6138126A Method for allocating files in a file system integrated with a raid disk sub-system 有权
标题翻译：在与RAID磁盘子系统集成的文件系统中分配文件的方法
公开(公告)号：US6138126A
公开(公告)日：2000-10-24
申请号：US359168
申请日：1999-07-21
申请人： David Hitz , Michael Malcolm , James Lau , Byron Rakitzis
发明人： David Hitz , Michael Malcolm , James Lau , Byron Rakitzis
IPC分类号： G06F3/06 , G06F12/00 , G06F17/00 , G06F17/30
CPC分类号： G06F3/0643 , G06F11/1076 , G06F17/30067 , G06F3/0613 , G06F3/064 , G06F3/0689 , G06F2003/0691 , G06F3/0601 , Y10S707/99943 , Y10S707/99953 , Y10S707/99956
摘要： A method is disclosed for integrating a file system with a RAID array that exports precise information about the arrangement of data blocks in the RAID subsystem. The file system examines this information and uses it to optimize the location of blocks as they are written to the RAID system. Thus, the system uses explicit knowledge of the underlying RAID disk layout to schedule disk allocation. The method uses separate current-write location (CWL) pointers for each disk in the disk array where the pointers simply advance through the disks as writes occur. The algorithm used has two primary goals. The first goal is to keep the CWL pointers as close together as possible, thereby improving RAID efficiency by writing to multiple blocks in the stripe simultaneously. The second goal is to allocate adjacent blocks in a file on the same disk, thereby improving read back performance. The method satisfies the first goal by always writing on the disk with the lowest CWL pointer. For the second goal, a new disks chosen only when the algorithm starts allocating space for a new file, or when it has allocated N blocks on the same disk for a single file. A sufficient number of blocks is defined as all the buffers in a chunk of N sequential buffers in a file. The result is that CWL pointers are never more than N blocks apart on different disks, and large files have N consecutive blocks on the same disk.
摘要翻译：公开了一种用于将文件系统与导出关于RAID子系统中的数据块的布置的精确信息的RAID阵列集成的方法。文件系统检查此信息，并使用它来优化块写入RAID系统时的位置。因此，系统使用底层RAID磁盘布局的显式知识来计划磁盘分配。该方法为磁盘阵列中的每个磁盘使用单独的当前写入位置（CWL）指针，其中当发生写入时，指针简单地通过磁盘。所使用的算法有两个主要目标。第一个目标是使CWL指针尽可能靠近，从而通过同时写入条带中的多个块来提高RAID效率。第二个目标是将文件中的相邻块分配到同一个磁盘上，从而提高回读性能。该方法通过始终使用最低CWL指针在磁盘上写入来满足第一个目标。对于第二个目标，只有当算法开始为新文件分配空间时，或者在同一个磁盘上为单个文件分配了N个块时才选择新的磁盘。足够数量的块被定义为文件中N个顺序缓冲区块中的所有缓冲区。结果是CWL指针在不同的磁盘上绝对不超过N个块，大文件在同一个磁盘上有N个连续的块。

7. 发明授权

US5819292A Method for maintaining consistent states of a file system and for creating user-accessible read-only copies of a file system 失效
标题翻译：用于维护文件系统的一致状态并创建文件系统的用户可访问的只读副本的方法
公开(公告)号：US5819292A
公开(公告)日：1998-10-06
申请号：US454921
申请日：1995-05-31
申请人： David Hitz , Michael Malcolm , James Lau , Byron Rakitzis
发明人： David Hitz , Michael Malcolm , James Lau , Byron Rakitzis
IPC分类号： G06F12/00 , G06F11/14 , G06F17/30
CPC分类号： G06F17/3015 , G06F11/1435 , G06F2201/84 , Y10S707/99953 , Y10S707/99954
摘要： A method is disclosed for maintaining consistent states of a file system. The file system progresses from one self-consistent state to another self-consistent state. The set of self-consistent blocks on disk that is rooted by a root inode is referred to as a consistency point. The root inode is stored in a file system information structure. To implement consistency points, new data is written to unallocated blocks on disk. A new consistency point occurs when the file system information structure is updated by writing a new root inode into it. Thus, as long as the root inode is not updated, the state of the file system represented on disk does not change. The method also creates snapshots that are user-accessible read-only copies of the file system. A snapshot uses no disk space when it is initially created. It is designed so that many different snapshots can be created for the same file system. Unlike prior art file systems that create a done by duplicating an entire inode file and all indirect blocks, the method of the present invention duplicates only the inode that describes the inode file. A multi-bit free-block map file is used to prevent data referenced by snapshots from being overwritten on disk.
摘要翻译：公开了一种用于维持文件系统的一致状态的方法。文件系统从一个自我一致的状态进展到另一个自我一致的状态。由根inode生成的磁盘上的一组自相关块被称为一致性点。根inode存储在文件系统信息结构中。要实现一致性点，新数据将写入磁盘上的未分配块。当通过在其中写入新的根节点来更新文件系统信息结构时，会发生新的一致性点。因此，只要root inode不被更新，在磁盘上表示的文件系统的状态就不会改变。该方法还创建快照，这些快照是文件系统的用户可访问的只读副本。快照在最初创建时不使用磁盘空间。它的设计使得可以为同一个文件系统创建许多不同的快照。与通过复制整个inode文件和所有间接块创建完成的现有技术文件系统不同，本发明的方法仅复制描述了inode文件的inode。多位自由块映射文件用于防止快照引用的数据被覆盖在磁盘上。

8. 发明授权

US07574464B2 System and method for enabling a storage system to support multiple volume formats simultaneously 有权
标题翻译：使存储系统能够同时支持多种卷格式的系统和方法
公开(公告)号：US07574464B2
公开(公告)日：2009-08-11
申请号：US11118455
申请日：2005-04-29
申请人： David Hitz , John K. Edwards
发明人： David Hitz , John K. Edwards
IPC分类号： G06F12/00
CPC分类号： G06F3/0689 , G06F3/0607 , G06F3/0643 , Y10S707/99956
摘要： A system and method enables a storage system to support multiple volume type simultaneously. A volume type field is contained within a file system information block that permits the storage system to determine the type of volume of a particular volume associated therewith. The storage operating system may then interpret various on-disk data structures in accordance with the appropriate volume type.
摘要翻译：系统和方法使存储系统能够同时支持多种卷类型。卷类型字段包含在文件系统信息块中，其允许存储系统确定与其相关联的特定卷的体积的类型。然后，存储操作系统可以根据适当的卷类型来解释各种在盘数据结构。

9. 发明授权

US07200603B1 In a data storage server, for each subsets which does not contain compressed data after the compression, a predetermined value is stored in the corresponding entry of the corresponding compression group to indicate that corresponding data is compressed 有权
标题翻译：在数据存储服务器中，对于在压缩之后不包含压缩数据的每个子集，将预定值存储在相应的压缩组的相应条目中，以指示对应的数据被压缩
公开(公告)号：US07200603B1
公开(公告)日：2007-04-03
申请号：US10755020
申请日：2004-01-08
申请人： David Hitz , Mehul S. Shah , Daniel W. Ting , James J. Voll
发明人： David Hitz , Mehul S. Shah , Daniel W. Ting , James J. Voll
IPC分类号： G06F17/00 , G06F17/30 , G06F13/12 , G06K9/36 , H04K1/00
CPC分类号： G06F11/1451 , Y10S707/99931 , Y10S707/99942 , Y10S707/99945 , Y10S707/99953
摘要： In a technique for compressing data, a data storage server receives a set of data, which includes a first number of subsets. The storage server defines a number of compression groups for the set of data, each compression group including multiple entries, each entry containing a pointer to a different subset of the set of data. At least part of the set of data is then compressed into a smaller number of subsets. For each of the subsets which does not contain compressed data after the compression, a predetermined value is stored in the corresponding entry of the corresponding compression group, to indicate that corresponding data is compressed and represented elsewhere in the compression group. The predetermined value may also indicate which compression algorithm was used to compress the data.
摘要翻译：在压缩数据的技术中，数据存储服务器接收包括第一数量子集的一组数据。存储服务器为该组数据定义多个压缩组，每个压缩组包括多个条目，每个条目包含指向该组数据的不同子集的指针。然后将该组数据的至少一部分压缩成较少数量的子集。对于在压缩之后不包含压缩数据的每个子集，在相应的压缩组的相应条目中存储预定值，以指示对应的数据被压缩并在压缩组的别处表示。预定值还可以指示哪种压缩算法用于压缩数据。

10. 发明授权

US06988219B2 Providing parity in a RAID sub-system using non-volatile memory 失效
公开(公告)号：US06988219B2
公开(公告)日：2006-01-17
申请号：US10233311
申请日：2002-08-28
申请人： David Hitz , Michael Malcolm , James Lau , Byron Rakitzis
发明人： David Hitz , Michael Malcolm , James Lau , Byron Rakitzis
IPC分类号： G06F11/00
CPC分类号： G06F11/1076 , G06F2211/1059 , G06F2211/1061 , G11B20/1833
摘要： The present invention is a method for providing error correction for an array of disks using non-volatile random access memory (NV-RAM). Non-volatile RAM is used to increase the speed of RAID recovery from a disk error(s). This is accomplished by keeping a list of all disk blocks for which the parity is possibly inconsistent. Such a list of disk blocks is much smaller than the total number of parity blocks in the RAID subsystem. The total number of parity blocks in the RAID subsystem is typically in the range of hundreds of thousands of parity blocks. Knowledge of the number of parity blocks that are possibly inconsistent makes it possible to fix only those few blocks, identified in the list, in a significantly smaller amount of time than is possible in the prior art. The technique for safely writing to a RAID array with a broken disk is complicated. In this technique, data that can become corrupted is copied into NV-RAM before the potentially corrupting operation is performed.

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