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1. 发明授权

US09268644B1 Systems and methods for raid acceleration 有权
标题翻译：突袭加速的系统和方法
公开(公告)号：US09268644B1
公开(公告)日：2016-02-23
申请号：US13449628
申请日：2012-04-18
申请人： Srikumar Subramanian , Sankarji Gopalakrishnan , Narayanaswami Ganapathy , Paresh Chatterjee , Udita Chatterjee
发明人： Srikumar Subramanian , Sankarji Gopalakrishnan , Narayanaswami Ganapathy , Paresh Chatterjee
IPC分类号： G06F11/14
CPC分类号： G06F11/1435 , G06F3/06 , G06F11/1076 , G06F11/3031 , G06F11/3058 , G06F2211/1004 , G06F2211/1007 , G06F2211/104 , G06F2211/1057
摘要： A RAID module for a RAID controller that includes a thin RAID layer and a thin disk layer. The thin RAID layer sits between an operating system layer and a RAID stack, and intercepts and fields requests and I/Os made the between operating system and the RAID stack. The thin disk layer sits between the RAID stack and the disks that comprise the array, and intercepts and fields requests and I/Os made between the RAID stack and the array. The module may maintain a bitmap with an entry corresponding to each stripe of the array. When the module detects that a stripe has zero data, the entry in the bitmap for the stripe is set to 0. When the module detects that data has been written to a stripe, the entry in the bitmap for the stripe is set to 1.
摘要翻译： RAID控制器的RAID模块，包括一个薄的RAID层和一个薄磁盘层。瘦RAID层位于操作系统层和RAID堆栈之间，拦截和字段请求和I / O在操作系统和RAID堆栈之间进行操作。磁盘层位于RAID堆栈和构成阵列的磁盘之间，并且在RAID堆栈和阵列之间进行截取和字段请求和I / O。模块可以使用与阵列的每个条带对应的条目来维护位图。当模块检测到条带具有零数据时，条带的位图中的条目设置为0.当模块检测到数据已写入条带时，条带的位图中的条目设置为1。

2. 发明授权

US08549522B1 Automated testing environment framework for testing data storage systems 有权
标题翻译：用于测试数据存储系统的自动测试环境框架
公开(公告)号：US08549522B1
公开(公告)日：2013-10-01
申请号：US12173238
申请日：2008-07-15
申请人： Paresh Chatterjee , Srikumar Subramanian , Narayanaswami Ganapathy
发明人： Paresh Chatterjee , Srikumar Subramanian , Narayanaswami Ganapathy
IPC分类号： G06F11/28
CPC分类号： G06F11/3664 , G06F11/3672
摘要： Technologies for an automated testing environment (ATE) framework can support the creation and execution of various automated tests on data storage systems. The ATE framework can support various configurations of multiple client systems exercising multiple storage target systems. A connectionless communication model can be supported among elements within the ATE. Complex tests can be subdivided into smaller jobs that can be executed sequentially, in parallel, or any combination thereof. Sophisticated scheduling mechanisms can include dependency relationships that can require one job to finish before another job begins. Multiple storage targets and multiple initiators can be involved in various configurations and combinations for specific testing tasks. The ATE framework can support extensibility, test tracking, reporting of test results, and fault injection.
摘要翻译：自动测试环境（ATE）框架的技术可以支持在数据存储系统上创建和执行各种自动化测试。 ATE框架可以支持运行多个存储目标系统的多个客户端系统的各种配置。 ATE中的元素之间可以支持无连接通信模型。复杂测试可以细分为可以顺序执行，并行执行的任务或其任何组合的较小作业。复杂的调度机制可以包括可以在另一个作业开始之前完成一个作业的依赖关系。多个存储目标和多个启动器可以涉及特定测试任务的各种配置和组合。 ATE框架可以支持可扩展性，测试跟踪，测试结果报告和故障注入。

3. 发明授权

US08046547B1 Storage system snapshots for continuous file protection 有权
标题翻译：用于连续文件保护的存储系统快照
公开(公告)号：US08046547B1
公开(公告)日：2011-10-25
申请号：US12013099
申请日：2008-01-11
申请人： Paresh Chatterjee , Srikumar Subramanian , Suresh Grandhi , Narayanaswami Ganapathy
发明人： Paresh Chatterjee , Srikumar Subramanian , Suresh Grandhi , Narayanaswami Ganapathy
IPC分类号： G06F13/00 , G06F13/28 , G06F7/00 , G06F17/00
CPC分类号： G06F11/1461 , G06F2201/84
摘要： Techniques for continuous data protection can include creating snapshots of one or more underlying storage volumes upon specific file system events. Generating snapshots upon every file close event can protect the files in a storage system by keeping a snapshot of every version or modification of each file. Removal of redundant snapshots can mitigate the impact on storage capacity associated with creating these large numbers of volume snapshots upon each file close event. Additionally, file closure lists can be employed to allow generating snapshots only when a previously closed file is reopened. Such an approach can protect the previous version of a file prior to the opening of a new version of the file. Such an approach can also mitigate storage capacity impact without the creation of redundant snapshots.
摘要翻译：用于连续数据保护的技术可以包括在特定文件系统事件上创建一个或多个底层存储卷的快照。在每个文件关闭事件时生成快照可以通过保存每个版本的快照或每个文件的修改来保护存储系统中的文件。删除冗余快照可以减轻与每个文件关闭事件时创建大量卷快照相关的存储容量的影响。此外，文件关闭列表可以用于仅在重新打开先前关闭的文件时生成快照。这种方法可以在打开新版本的文件之前保护文件的先前版本。这种方法也可以减轻存储容量的影响，而不会创建冗余快照。

4. 发明授权

US09396067B1 I/O accelerator for striped disk arrays using parity 有权
标题翻译：使用奇偶校验的条形磁盘阵列的I / O加速器
公开(公告)号：US09396067B1
公开(公告)日：2016-07-19
申请号：US13449496
申请日：2012-04-18
申请人： Srikumar Subramanian , Raghavan Sowrirajan , Sankarji Gopalakrishnan , Paresh Chatterjee , Udita Chatterjee
发明人： Srikumar Subramanian , Raghavan Sowrirajan , Sankarji Gopalakrishnan , Paresh Chatterjee
IPC分类号： G06F11/10
CPC分类号： G06F3/061 , G06F3/0611 , G06F3/0613 , G06F3/0644 , G06F3/0656 , G06F3/0659 , G06F3/0689 , G06F11/1076 , G06F11/1088 , G06F12/0866 , G06F2211/1019 , G06F2211/1038 , G06F2211/104 , G06F2211/1066 , G06F2211/1069
摘要： Disclosed herein is an enhanced volume manager (VM) for a storage system that accelerates input/output (I/O) performance for random write operations to a striped disk array using parity. More specifically, various implementations are directed to accelerating “random writes” (writes comprising less than a complete stripe of data) by consolidating several random writes together to create a “sequential write” (a full-stripe write) to eliminate one or more read operations and/or increase the volume of new/updated data stored for each write operation. Several such implementations comprise functionality in the VM (volume manager) for identifying random write I/O requests, queuing them locally in a journal, and then periodically flushing the journal to the disk array as a sequential write request.
摘要翻译：本文公开了一种用于存储系统的增强型卷管理器（VM），其加速使用奇偶校验的条带式磁盘阵列的随机写入操作的输入/输出（I / O）性能。更具体地，各种实现涉及通过将几个随机写入合并以创建“顺序写入”（全条带写入）来消除一个或多个读取来加速“随机写入”（包括小于完整数据条带的写入）操作和/或增加每个写操作存储的新/更新数据的数量。几个这样的实现包括VM（卷管理器）中的用于识别随机写入I / O请求的功能，将其本地排列在日志中，然后周期性地将日志刷新到磁盘阵列作为顺序写入请求。

5. 发明授权

US08260744B1 Method, system, apparatus, and computer-readable medium for taking and managing snapshots of a storage volume 有权
标题翻译：用于采集和管理存储卷的快照的方法，系统，设备和计算机可读介质
公开(公告)号：US08260744B1
公开(公告)日：2012-09-04
申请号：US12042705
申请日：2008-03-05
申请人： Paresh Chatterjee , Vijayarankan Muthirisavenugopal , Srikumar Subramanian , Ajit Narayanan
发明人： Paresh Chatterjee , Vijayarankan Muthirisavenugopal , Srikumar Subramanian , Ajit Narayanan
IPC分类号： G06F7/00 , G06F17/00
CPC分类号： G06F11/1451 , G06F2201/84 , Y10S707/99955
摘要： A method, system, apparatus, and computer-readable medium are provided for taking snapshots of a storage volume. According to aspects of one method, each snapshot is represented as a unique sequence number. Every fresh write access to a volume in a new snapshot lifetime is allocated a new section in the disk, called a provision, which is labeled with the sequence number. Read-modify-write operations are performed on a sub-provision level at the granularity of a chunk. Because each provision contains chunks with valid data and chunks with invalid data, a bitmap is utilized to identify the valid and invalid chunks with each provision. Provisions corresponding to different snapshots are arranged in a linked list. Branches from the linked list can be created for storing writable snapshots. Provisions may also be deleted and rolled back by manipulating the contents of the linked lists.
摘要翻译：提供了一种用于拍摄存储卷的快照的方法，系统，装置和计算机可读介质。根据一个方法的方面，每个快照被表示为唯一的序列号。在新的快照生命周期中，对每个新卷的读取访问将在磁盘中分配一个新的部分，称为配置，标记为序列号。读取 - 修改 - 写入操作是在子级别上以块的粒度执行的。由于每个条款包含有有效数据的块和无效数据的块，因此利用位图来识别每个条款的有效和无效的块。对应于不同快照的规定被排列在链表中。链接分支可以创建用于存储可写快照。也可以通过操纵链表的内容来删除和回滚条款。

6. 发明授权

US08117158B1 Method, system, apparatus, and computer-readable medium for taking and managing snapshots of a storage volume 有权
公开(公告)号：US08117158B1
公开(公告)日：2012-02-14
申请号：US12042710
申请日：2008-03-05
申请人： Paresh Chatterjee , Vijayarankan Muthirisavenugopal , Srikumar Subramanian , Ajit Narayanan
发明人： Paresh Chatterjee , Vijayarankan Muthirisavenugopal , Srikumar Subramanian , Ajit Narayanan
IPC分类号： G06F7/00 , G06F17/00
CPC分类号： G06F11/1451 , G06F2201/84 , Y10S707/99955
摘要： A method, system, apparatus, and computer-readable medium are provided for taking snapshots of a storage volume. According to aspects of one method, each snapshot is represented as a unique sequence number. Every fresh write access to a volume in a new snapshot lifetime is allocated a new section in the disk, called a provision, which is labeled with the sequence number. Read-modify-write operations are performed on a sub-provision level at the granularity of a chunk. Because each provision contains chunks with valid data and chunks with invalid data, a bitmap is utilized to identify the valid and invalid chunks with each provision. Provisions corresponding to different snapshots are arranged in a linked list. Branches from the linked list can be created for storing writable snapshots. Provisions may also be deleted and rolled back by manipulating the contents of the linked lists.

7. 发明授权

US08108580B1 Low latency synchronous replication using an N-way router 有权
标题翻译：使用N路由器的低延迟同步复制
公开(公告)号：US08108580B1
公开(公告)日：2012-01-31
申请号：US12104129
申请日：2008-04-16
申请人： Paresh Chatterjee , Loganathan Ranganathan , Narayanan Balakrishnan , Srikumar Subramanian
发明人： Paresh Chatterjee , Loganathan Ranganathan , Narayanan Balakrishnan , Srikumar Subramanian
IPC分类号： G06F13/12 , G06F13/00
CPC分类号： G06F13/00 , G06F3/067 , G06F11/14 , G06F11/1471 , G06F11/2076 , G06F13/12 , G06F2201/855 , H04L45/00 , H04L67/1097
摘要： Technologies for efficient synchronous replication across heterogeneous storage nodes can provide the performance of high-speed storage units while leveraging low-cost and high-capacity backup storage units within the same system. The performance of low-cost, high-capacity hard disks may be improved by initially storing data into sequential physical locations. A sequential journal of I/Os may be used in a replicated secondary node to allow for rapid completion of I/Os. A separate background process can later scatter the sequentially logged I/O data into its proper location for storage. A programmable n-way router can be configured to route I/Os as needed to improve overall performance of the storage unit. A secondary node log device can also be used to provide continuous data protection (CDP). Lastly, packetizing together I/Os prior to delivery to a secondary node may reduce interrupts and context switches in the primary node, thereby improving performance of the storage system.
摘要翻译：跨异构存储节点进行高效同步复制的技术可以提供高速存储单元的性能，同时利用同一系统内的低成本和大容量备份存储单元。通过最初将数据存储到连续的物理位置，可以提高低成本，大容量硬盘的性能。可以在复制的辅助节点中使用I / O的顺序日志以允许快速完成I / O。单独的后台进程可以稍后将顺序记录的I / O数据分散到其正确位置进行存储。可编程n路由器可以配置为根据需要路由I / O，以提高存储单元的整体性能。次级节点日志设备也可用于提供连续数据保护（CDP）。最后，在传送到辅助节点之前将I / O分组在一起可以减少主节点中的中断和上下文切换，从而提高存储系统的性能。

8. 发明授权

US07373366B1 Method, system, apparatus, and computer-readable medium for taking and managing snapshots of a storage volume 有权
标题翻译：用于采集和管理存储卷的快照的方法，系统，设备和计算机可读介质
公开(公告)号：US07373366B1
公开(公告)日：2008-05-13
申请号：US11255146
申请日：2005-10-20
申请人： Paresh Chatterjee , Vijayarankan Muthirisavenugopal , Srikumar Subramanian , Ajit Narayanan
发明人： Paresh Chatterjee , Vijayarankan Muthirisavenugopal , Srikumar Subramanian , Ajit Narayanan
IPC分类号： G06F12/00 , G06F17/30
CPC分类号： G06F11/1451 , G06F2201/84 , Y10S707/99955
摘要： A method, system, apparatus, and computer-readable medium are provided for taking snapshots of a storage volume. According to aspects of one method, each snapshot is represented as a unique sequence number. Every fresh write access to a volume in a new snapshot lifetime is allocated a new section in the disk, called a provision, which is labeled with the sequence number. Read-modify-write operations are performed on a sub-provision level at the granularity of a chunk. Because each provision contains chunks with valid data and chunks with invalid data, a bitmap is utilized to identify the valid and invalid chunks with each provision. Provisions corresponding to different snapshots are arranged in a linked list. Branches from the linked list can be created for storing writable snapshots. Provisions may also be deleted and rolled back by manipulating the contents of the linked lists.
摘要翻译：提供了一种用于拍摄存储卷的快照的方法，系统，装置和计算机可读介质。根据一个方法的方面，每个快照被表示为唯一的序列号。在新的快照生命周期中，对每个新卷的读取访问将在磁盘中分配一个新的部分，称为配置，标记为序列号。读取 - 修改 - 写入操作是在子级别上以块的粒度执行的。由于每个条款包含有有效数据的块和无效数据的块，因此利用位图来识别每个条款的有效和无效的块。对应于不同快照的规定被排列在链表中。链接分支可以创建用于存储可写快照。也可以通过操纵链表的内容来删除和回滚条款。

9. 发明授权

US08479037B1 Distributed hot-spare storage in a storage cluster 有权
标题翻译：分布式热备份存储在存储集群中
公开(公告)号：US08479037B1
公开(公告)日：2013-07-02
申请号：US13220305
申请日：2011-08-29
申请人： Paresh Chatterjee , Ajit Narayanan , Anandh Mahalingam , Srikumar Subramanian
发明人： Paresh Chatterjee , Ajit Narayanan , Anandh Mahalingam , Srikumar Subramanian
IPC分类号： G06F11/00
CPC分类号： G06F11/2061 , G06F11/2082 , G06F11/2094 , G06F2211/1028
摘要： A method, system, apparatus, and computer-readable medium are described for providing distributed hot-spare storage in a redundant storage cluster. According to one method, a portion of the unutilized space on the storage cluster is utilized as a distributed hot-spare storage node. Through this mechanism, a redundant storage cluster with N storage nodes may be contracted to a redundant array with N−1 nodes. Thin provisioning and intelligent data placement may also be utilized to implement the distributed hot-spare storage node. Through repeated application of such methods and systems, the failure of any storage node or the sequential failure of multiple storage nodes within a redundant storage cluster results in the recreation of the cluster as a redundant storage array with one fewer node, but with the same redundancy.
摘要翻译：描述了用于在冗余存储集群中提供分布式热备用存储的方法，系统，装置和计算机可读介质。根据一种方法，将存储集群上未使用空间的一部分用作分布式热备用存储节点。通过这种机制，具有N个存储节点的冗余存储集群可以缩减为具有N-1个节点的冗余阵列。也可以利用精简配置和智能数据放置来实现分布式热备用存储节点。通过重复应用这些方法和系统，任何存储节点的故障或冗余存储集群内的多个存储节点的顺序故障导致集群重建为具有少一个节点但具有相同冗余的冗余存储阵列。

10. 发明授权

US08352716B1 Boot caching for boot acceleration within data storage systems 有权
标题翻译：启动缓存，用于数据存储系统中的启动加速
公开(公告)号：US08352716B1
公开(公告)日：2013-01-08
申请号：US12355439
申请日：2009-01-16
申请人： Paresh Chatterjee , Srikumar Subramanian , Suresh Grandhi , Vijayarankan Muthirisavenugopal
发明人： Paresh Chatterjee , Srikumar Subramanian , Suresh Grandhi , Vijayarankan Muthirisavenugopal
IPC分类号： G06F9/00
CPC分类号： G06F9/4416
摘要： Technologies are described herein for boot caching to accelerate boot access in a data storage system providing boot consolidation. Boot caching may be provided to improve boot access for multiple clients concurrently booting from a common storage server. Boot statistics may be collected per user or client. The boot statistics can determine common patterns within the boot procedures of the clients and may be used to compute boot caching tables. These tables may then be used during boot caching to accelerate booting of clients. A boot caching mechanism can be implemented to support improved booting performance by caching data blocks common to multiple booting volumes. This approach can leverage the condition that much of the data loaded by clients at boot time may be substantially identical, because booting can involve loading the same operating system components into each client.
摘要翻译：这里描述了用于启动缓存的技术，以加速提供启动整合的数据存储系统中的引导访问。可以提供引导缓存以改善从通用存储服务器并发引导的多个客户机的引导访问。可以为每个用户或客户端收集引导统计信息。引导统计信息可以确定客户机引导过程中的常见模式，并可用于计算引导缓存表。然后可以在启动缓存期间使用这些表，以加速客户端的引导。可以实现引导缓存机制，以通过缓存多个引导卷通用的数据块来支持改进的引导性能。这种方法可以利用客户端在引导时加载的大部分数据可能基本相同的条件，因为引导可能涉及将相同的操作系统组件加载到每个客户端中。

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