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1. 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。

2. 发明授权

US08954670B1 Systems and methods for improved fault tolerance in RAID configurations 有权
标题翻译：用于改善RAID配置中容错的系统和方法
公开(公告)号：US08954670B1
公开(公告)日：2015-02-10
申请号：US13449552
申请日：2012-04-18
申请人： Srikumar Subramanian , Raghavan Sowrirajan , Udita Chatterjee
发明人： Srikumar Subramanian , Raghavan Sowrirajan , Paresh Chatterjee
IPC分类号： G06F12/16
CPC分类号： G06F11/2056 , G06F11/0727 , G06F11/0784 , G06F11/1076 , G06F11/1092
摘要： A RAID bad block module is added to a RAID controller. The bad block module intercepts bad block errors and marks them in a bad block table. When a bad block error is intercepted the bad block module logs the error and determines, based on the error and previously received errors logged in the table, whether the RAID controller can handle the error without failing the entire array. If so, the bad block module passes the error to the RAID controller. Else, the bad block module passes the error to an application or operating system where it is handled like any other disk error. Thus, instead of failing the entire array, the bad block errors are dealt with by the operating system.
摘要翻译：将RAID坏块模块添加到RAID控制器。坏块模块拦截坏块错误并将其标记在坏块表中。当坏块错误被拦截时，坏块模块记录错误，并根据错误和以前收到的表中记录的错误确定RAID控制器是否可以处理该错误而不会使整个阵列失败。如果是这样，坏块模块将错误传递给RAID控制器。否则，坏块模块将错误传递到应用程序或操作系统，其处理方式与任何其他磁盘错误一样。因此，代替整个阵列失败，错误的块错误由操作系统处理。

3. 发明授权

US08732411B1 Data de-duplication for information storage systems 有权
标题翻译：信息存储系统的重复数据删除
公开(公告)号：US08732411B1
公开(公告)日：2014-05-20
申请号：US12274000
申请日：2008-11-19
申请人： Paresh Chatterjee , Srikumar Subramanian , Sharon Enoch , Raghavan Sowrirajan
发明人： Paresh Chatterjee , Srikumar Subramanian , Sharon Enoch , Raghavan Sowrirajan
IPC分类号： G06F12/00 , G06F13/00 , G06F13/28
CPC分类号： G06F3/0683 , G06F3/0608 , G06F3/0641
摘要： Technologies for eliminating duplicate data within a storage system can efficiently identify and eliminate duplication by remapping borrower regions to share physical storage space with lender regions. Block-level de-duplication can co-exist with storage architectures for thin provisioning and snapshot management. Lending maps can track redirected pointers from borrower regions to shared physical storage from lender regions. The lending maps can track the freed status of regions to support efficient write I/O operations without defaulting to unnecessary read-modify-write cycles to complete data writes. Redundancy of de-duplicated data can maintain one or more copies to support recovery from media errors. Candidate regions for de-duplication can be identified by monitoring the times and patterns of data access operations. A sampled mechanism for calculating and comparing signatures of data blocks can support the efficient identification of duplicated data within the storage system.
摘要翻译：在存储系统中消除重复数据的技术可以通过重新映射借款人区域与贷款人区域共享物理存储空间来有效地识别和消除重复。块级重复数据删除可与用于精简配置和快照管理的存储架构共存。贷款地图可以跟踪借款人地区的重定向指针到贷款人地区的共享物理存储。贷款地图可以跟踪区域的释放状态，以支持高效的写入I / O操作，而不会默认不必要的读取 - 修改 - 写入周期来完成数据写入。重复数据的冗余可以维护一个或多个副本以支持从媒体错误中恢复。可以通过监视数据访问操作的时间和模式来识别重复数据删除的候选区域。用于计算和比较数据块的签名的采样机制可以支持对存储系统内的重复数据的有效识别。

4. 发明授权

US08504524B1 Reclaiming space from a file system 有权
公开(公告)号：US08504524B1
公开(公告)日：2013-08-06
申请号：US12702824
申请日：2010-02-09
申请人： Paresh Chatterjee , Vijayarankan Muthirisavenugopal , Raghavan Sowrirajan
发明人： Paresh Chatterjee , Vijayarankan Muthirisavenugopal , Raghavan Sowrirajan
IPC分类号： G06F17/00 , G06F7/00
CPC分类号： G06F17/30088 , G06F17/30067
摘要： Technologies are provided for reclaiming a file system coupled to a block device. In these technologies, a dummy file is created. The dummy file is expanded to fill a volume in the block device. A mapping of the dummy file to locations in the volume is retrieved. When the mapping of the dummy file to the locations in the volume is retrieved, corresponding space in the volume is reclaimed. This space may include the locations in the volume corresponding to the mapping of the dummy file. When this space in the volume is reclaimed, the dummy file is deleted.

5. 发明授权

US08799429B1 Boot acceleration by consolidating client-specific boot data in a data storage system 有权
标题翻译：通过在数据存储系统中整合客户端特定的引导数据来启动加速
公开(公告)号：US08799429B1
公开(公告)日：2014-08-05
申请号：US12435602
申请日：2009-05-05
申请人： Paresh Chatterjee , Vijayarankan Muthirisavenugopal , Narayanaswami Ganapathy , Raghavan Sowrirajan
发明人： Paresh Chatterjee , Vijayarankan Muthirisavenugopal , Narayanaswami Ganapathy , Raghavan Sowrirajan
IPC分类号： G06F15/177 , G06F9/00 , G06F9/44 , H04L29/08
CPC分类号： G06F9/4416 , H04L29/0854 , H04L29/08549 , H04L29/08729 , H04L67/1097 , H04L67/34
摘要： Technologies are described herein for accelerating the boot process of client computers by consolidating client-specific boot data in a data storage system. Boot statistics are collected for a number of client computers booting from virtual storage volumes provided by the data storage system. The boot statistics are analyzed to identify client-specific boot data stored on each of the virtual storage volumes, and the client-specific boot data is consolidated and copied into contiguous regions of a single, consolidated boot volume in the data storage system. Requests for read operations from the client computers for the client-specific boot data are then redirected to the consolidated boot volume, increasing boot performance for the client computers.
摘要翻译：本文描述了技术，用于通过在数据存储系统中整合客户端特定的引导数据来加速客户端计算机的引导过程。针对由数据存储系统提供的虚拟存储卷引导的多个客户端计算机收集引导统计信息。分析引导统计信息以识别存储在每个虚拟存储卷上的客户端特定的引导数据，并且将客户端特定的引导数据合并并复制到数据存储系统中的单个合并引导卷的连续区域中。然后将客户端计算机的针对特定于客户端的引导数据的读取操作的请求重定向到统一引导卷，从而提高客户端计算机的引导性能。

6. 发明授权

US08352497B1 Page object caching for variably sized access control lists in data storage systems 有权
公开(公告)号：US08352497B1
公开(公告)日：2013-01-08
申请号：US12702942
申请日：2010-02-09
申请人： Paresh Chatterjee , Srikumar Somangili Subramanian , Raghavan Sowrirajan
发明人： Paresh Chatterjee , Srikumar Somangili Subramanian , Raghavan Sowrirajan
IPC分类号： G06F7/04 , G06F17/30
CPC分类号： G06F21/60 , G06F12/0864 , G06F12/0871 , G06F12/0875 , G06F12/123 , G06F17/30097 , G06F17/30312 , G06F17/3033 , G06F2212/1044
摘要： Technologies are described herein for caching variably sized access control lists (ACLs) in a data storage system utilizing page object caching. A request to access a file is received. An inode number of the requested file is identified. A hash key based on the inode number and a predefined hash value is determined. A determination is made as to whether the hash key is contained in a hash list. In response to determining that the hash key is contained in the hash list, access to a page object in the memory is provided. The page object contains an access control list (ACL) associated with the requested file. The ACL is retrieved from the page object.

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