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1. 发明授权

US08515911B1 Methods and apparatus for managing multiple point in time copies in a file system 有权
标题翻译：用于在文件系统中管理多个时间点的方法和装置
公开(公告)号：US08515911B1
公开(公告)日：2013-08-20
申请号：US12349182
申请日：2009-01-06
申请人： Siyu Zhou , Hongliang Tang , Xiangping Chen , Sairam Iyer , Mark Ku
发明人： Siyu Zhou , Hongliang Tang , Xiangping Chen , Sairam Iyer , Mark Ku
IPC分类号： G06F7/00 , G06F17/30
CPC分类号： G06F17/3023
摘要： Methods and apparatus for organizing a plurality of versions of a file in a file system. The plurality of versions of the file are stored in a data structure having a hierarchical organization that reflects relationships among the plurality of versions. Each version of the plurality of versions is assigned a name that identifies its position in the hierarchical organization. The hierarchical organization of the data structure and the descriptive naming convention used for the plurality of versions in the data structure facilitates deleting a version while retaining other versions derived from the version following the deletion of the version, and enables a staged initialization of the data structure upon system start-up.
摘要翻译：用于在文件系统中组织文件的多个版本的方法和装置。文件的多个版本被存储在具有反映多个版本之间的关系的层次组织的数据结构中。为多个版本的每个版本分配一个标识其在分层组织中的位置的名称。用于数据结构中的多个版本的数据结构和描述性命名约定的分级组织有助于删除版本，同时保留在版本删除之后从版本导出的其他版本，并且启用数据结构的分阶段初始化系统启动时。

2. 发明授权

US08381027B1 Determining alternate paths in faulted systems 有权
标题翻译：确定故障系统中的备用路径
公开(公告)号：US08381027B1
公开(公告)日：2013-02-19
申请号：US12892333
申请日：2010-09-28
申请人： Qing Liu , Qi Zhang , Peter Tolvanen , T. David Evans , Hongliang Tang
发明人： Qing Liu , Qi Zhang , Peter Tolvanen , T. David Evans , Hongliang Tang
IPC分类号： G06F11/00
CPC分类号： G06F11/2092 , G06F11/201
摘要： A method is used in determining alternate paths in faulted systems. It is detected that a first processor has a problem accessing a target. The first processor has a first path to the target. An alternate path to the target is determined by identifying that a second processor has better access to the target than the first processor. The second processor has a second path to the target. Responsibility for I/O communication with the target is transferred from the first processor to the second processor. Responsibility for I/O communication with the target is transferred back to the first processor upon resolution of the problem.
摘要翻译：一种方法用于确定故障系统中的备用路径。检测到第一处理器在访问目标时具有问题。第一个处理器具有到目标的第一条路径。通过识别第二处理器比第一处理器更好地访问目标来确定到目标的备用路径。第二个处理器具有到目标的第二条路径。与目标的I / O通信的责任从第一处理器传送到第二处理器。解决问题后，与目标的I / O通信的责任将转回第一个处理器。

3. 发明授权

US08117160B1 Methods and apparatus for creating point in time copies in a file system using reference counts 有权
标题翻译：使用引用计数在文件系统中创建时间点副本的方法和设备
公开(公告)号：US08117160B1
公开(公告)日：2012-02-14
申请号：US12241715
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
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。

4. 发明授权

US08990520B1 Global memory as non-volatile random access memory for guest operating systems 有权
标题翻译：全局内存作为客户机操作系统的非易失性随机存取存储器
公开(公告)号：US08990520B1
公开(公告)日：2015-03-24
申请号：US13435328
申请日：2012-03-30
申请人： Hongliang Tang , Lixin Pang , Matthew H. Fredette , Patrick Brian Riordan , Uresh Vahalia , Steven T. McClure
发明人： Hongliang Tang , Lixin Pang , Matthew H. Fredette , Patrick Brian Riordan , Uresh Vahalia , Steven T. McClure
IPC分类号： G06F12/00 , G06F12/10
CPC分类号： G06F12/1072 , G06F11/00 , G06F11/14
摘要： Global memory of a storage system may be used to provide NVRAM capabilities to guest operating systems accessing the storage system. The non-volatility of NVRAM (i.e. that retains its information when power is turned off) provides that an NVRAM device provided by global memory may be used as a journaling device to track storage operations and facilitate recovery and/or failover processing in a storage system without needing to add additional hardware and/or other installed devices. Use of the global memory according to the system described herein to provide an NVRAM device, that may function as a journaling device, provides for the speeding up of transactions, thereby improving metadata intensive operations performance and reducing recovery time and/or failover time of a storage system without adding additional hardware support.
摘要翻译：可以使用存储系统的全局存储器来向访问存储系统的客户操作系统提供NVRAM功能。 NVRAM的非易失性（即在电源关闭时保留其信息）规定，由全局存储器提供的NVRAM设备可用作日志记录设备以跟踪存储操作并促进存储系统中的恢复和/或故障转移处理而不需要添加额外的硬件和/或其他已安装的设备。根据本文描述的系统使用全局存储器来提供可用作日志记录设备的NVRAM设备，用于提高事务的加速，从而提高元数据密集型操作性能并减少恢复时间和/或故障转移时间存储系统，无需添加额外的硬件支持。

5. 发明授权

US08407265B1 Hierarchical mapping of free blocks of cylinder groups of file systems built on slices of storage and linking of the free blocks 有权
标题翻译：文件系统的自由块的分层映射构建在存储片段和自由块的链接之上
公开(公告)号：US08407265B1
公开(公告)日：2013-03-26
申请号：US12950996
申请日：2010-11-19
申请人： Michael D. Scheer , Jean-Pierre Bono , Morgan Clark , Hongliang Tang , Sairam Veeraswamy , Pranit Sethi , Alexander S. Mathews
发明人： Michael D. Scheer , Jean-Pierre Bono , Morgan Clark , Hongliang Tang , Sairam Veeraswamy , Pranit Sethi , Alexander S. Mathews
IPC分类号： G06F12/00
CPC分类号： G06F17/30138
摘要： In a file server, a file system is built upon a volume of data storage. The file system includes multiple cylinder groups. Each cylinder group includes file system blocks. The file system blocks include allocated blocks and free blocks. The volume includes slices of storage, and each slice stores at least one of the cylinder groups. A hierarchical slice map has a top level that includes a count of free blocks in the file system, an upper level that includes a count of free blocks in groups of the slices, an intermediate level that includes a count of the free blocks in sub-groups of the slices, and a bottom level that includes a count of the free blocks in each slice of storage. To find a free block for allocation to a file, the slice map hierarchy is searched in a top-down fashion.
摘要翻译：在文件服务器中，文件系统是建立在一定数量的数据存储上的。文件系统包括多个气缸组。每个气缸组包括文件系统块。文件系统块包括分配的块和空闲块。卷包括存储片，并且每个片存储至少一个圆柱组。分级切片图具有包括文件系统中的空闲块的计数的顶层，包括片段中的空闲块的计数的上级，包括子块中的空闲块的计数的中间级，组的片，以及包括每个存储片中的空闲块的计数的底层。要找到用于分配到文件的空闲块，以自顶向下的方式搜索切片图层次结构。

6. 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。

7. 发明授权

US09053027B1 Techniques for maintaining and restoring dirty caches across CPU resets 有权
标题翻译：通过CPU复位维护和恢复脏缓存的技术
公开(公告)号：US09053027B1
公开(公告)日：2015-06-09
申请号：US13332563
申请日：2011-12-21
申请人： David Harvey , H. Austin Spang, IV , Richard G. Chandler , Hongliang Tang
发明人： David Harvey , H. Austin Spang, IV , Richard G. Chandler , Hongliang Tang
IPC分类号： G06F12/08
CPC分类号： G06F12/0804 , G06F9/467 , G06F11/2089 , G06F11/2092 , G06F11/2097 , G06F12/0815 , G06F12/0866
摘要： Described are techniques for performing caching. Write operations of a single transactions are received. Write data of the write operations is cached in one or more cache pages of a first cache of a first storage processor. State information is set for the one or more cache pages of the first cache from an invalid state to a prepared state. The write data of the write operations is also stored in a second cache of a second storage processor. A transaction commit state for the single transaction is set indicating that transaction commitment processing for the first cache has commenced and is pending. State information of the one or more cache pages of the first cache is set from the prepared state to a dirty state. The transaction commit state for the single transaction is updated to indicate that the transaction commitment processing for the first cache is completed.
摘要翻译：描述了执行缓存的技术。收到单个交易的写入操作。写入操作的写入数据被缓存在第一存储处理器的第一高速缓存的一个或多个缓存页面中。将状态信息设置为从无效状态到准备状态的第一高速缓存的一个或多个高速缓存页。写入操作的写入数据也存储在第二存储处理器的第二高速缓存中。设置单个事务的事务提交状态，指示第一个缓存的事务承诺处理已经开始并处于待处理状态。将第一高速缓存的一个或多个高速缓存页的状态信息从准备状态设置为脏状态。更新单个事务的事务提交状态，以指示第一个缓存的事务承诺处理完成。

8. 发明授权

US08930568B1 Method and apparatus for enabling access to storage 有权
标题翻译：用于访问存储的方法和装置
公开(公告)号：US08930568B1
公开(公告)日：2015-01-06
申请号：US13331478
申请日：2011-12-20
申请人： Steve Chalmer , Steven T. McClure , Serge Pirotte , Velmurugan Rathnam , Animesh Singh , Hongliang Tang
发明人： Steve Chalmer , Steven T. McClure , Serge Pirotte , Velmurugan Rathnam , Animesh Singh , Hongliang Tang
IPC分类号： G06F15/16 , G06F9/46 , G06F17/30
CPC分类号： G06F17/30 , G06F3/06 , G06F9/45558 , G06F13/10 , G06F2009/45579
摘要： When a guest OS loads within the context of a container provided by the host OS, the guest OS uses PCI or other protocol to specify a virtual hardware device. The guest OS enumerates the virtual hardware device to establish the size for the BARs and establish its view of physical addresses for the memory locations. A server running in the context of the container receives read/write requests from the guest OS, maps the read/write requests to host OS physical address space, and posts responses to the virtual hardware device. Since the guest OS executes memory related operations using its own memory space, exits to the container code are not required to implement storage related actions by the Guest OS. This allows performance of an application executing in the context of the guest OS to approximate performance of an application executing in the context of the host OS.
摘要翻译：当客户操作系统在由主机OS提供的容器的上下文中加载时，客户操作系统使用PCI或其他协议来指定虚拟硬件设备。客户操作系统枚举虚拟硬件设备以建立BAR的大小并建立其对存储器位置的物理地址的视图。在容器的上下文中运行的服务器从客户操作系统接收读/写请求，将读/写请求映射到主机OS物理地址空间，并将响应发布到虚拟硬件设备。由于访客操作系统使用自己的内存空间来执行与内存相关的操作，因此客户操作系统不需要退出到容器代码来执行与存储相关的操作。这允许在客户OS的上下文中执行的应用程序的性能来近似在主机OS的上下文中执行的应用程序的性能。

9. 发明授权

US08145947B1 User customizable CVFS namespace 有权
标题翻译：用户可自定义的CVFS命名空间
公开(公告)号：US08145947B1
公开(公告)日：2012-03-27
申请号：US11537001
申请日：2006-09-29
申请人： John Hayden , Hongliang Tang
发明人： John Hayden , Hongliang Tang
IPC分类号： G06F17/30
CPC分类号： G06F11/1448 , G06F11/1435
摘要： An apparatus and method are described for defining, maintaining and displaying a checkpoint result set to facilitate identification of desirable checkpoints during system recovery. The checkpoint result set may be mapped to a user-customizable namespace. The user customizes the namespace by selecting one or more characteristics of desirable file system checkpoints. Being able to customize the namespace in this manner enables the user to be provided a more streamlined checkpoint result set in the event of data corruption. As a result an appropriate checkpoint can be more quickly selected for use in recovery.
摘要翻译：描述了用于定义，维护和显示检查点结果集以便于在系统恢复期间识别所需检查点的装置和方法。检查点结果集可以映射到用户可自定义的命名空间。用户通过选择一个或多个所需文件系统检查点的特性来定制命名空间。能够以这种方式自定义命名空间，可以在数据损坏的情况下为用户提供更精简的检查点结果集。因此，可以更快地选择适当的检查点以用于恢复。

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