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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

US09063854B1 Systems and methods for cluster raid data consistency 有权
标题翻译：群集数据一致性的系统和方法
公开(公告)号：US09063854B1
公开(公告)日：2015-06-23
申请号：US13450065
申请日：2012-04-18
申请人： Srikumar Subramanian , Sankarji Gopalakrishnan , Udita Chatterjee
发明人： Srikumar Subramanian , Sankarji Gopalakrishnan , Paresh Chatterjee
IPC分类号： G06F11/00 , G06F11/07
CPC分类号： G06F11/073 , G06F11/1076 , G06F11/14
摘要： A first RAID module is added to a first RAID controller and a second RAID module is added to a second RAID controller. An array of physical disks is partitioned into two partitions across the array of physical disks. The first partition is assigned to the first RAID module and the second partition is exposed to the second RAID module. Each of the RAID modules exposes their respective partitions to their associated RAID controller as a single array. Each RAID module further receives I/O from its respective RAID controller, and translates the I/O to access its associated partition.
摘要翻译：将第一个RAID模块添加到第一个RAID控制器，第二个RAID模块被添加到第二个RAID控制器。物理磁盘阵列在物理磁盘阵列上分为两个分区。第一个分区被分配给第一个RAID模块，第二个分区暴露给第二个RAID模块。每个RAID模块将其各自的分区作为单个阵列公开到其关联的RAID控制器。每个RAID模块还从其相应的RAID控制器接收I / O，并转换I / O以访问其关联的分区。

4. 发明授权

US09304951B1 Policy based input/output dispatcher 有权
标题翻译：基于策略的输入/输出调度器
公开(公告)号：US09304951B1
公开(公告)日：2016-04-05
申请号：US13449491
申请日：2012-04-18
申请人： Srikumar Subramanian , Sankarji Gopalakrishnan , Loganathan Ranganathan , Udita Chatterjee
发明人： Paresh Chatterjee , Srikumar Subramanian , Sankarji Gopalakrishnan , Loganathan Ranganathan
IPC分类号： G06F13/16
CPC分类号： G06F13/161 , G06F3/06 , G06F3/061 , G06F3/0635 , G06F3/067 , G06F11/3034 , G06F11/3419 , G06F11/3433 , G06F11/3485 , G06F2201/81
摘要： Disclosed is a policy-based I/O dispatcher that intercepts I/O requests from several individual volumes made to a shared storage system (such as a RAID array) and manages these I/O requests so that no single volume monopolizes the I/O bandwidth and excludes the other volumes from timely completing their own I/O requests. Also disclosed are a plurality of attributes that may be assigned to each volume sharing a disk array to effectively manage the sharing of the disk array among the volumes. The I/O policy manager may handle I/O requests from several sources including volume-based iSCSI I/O requests as well as the file-share-based XFS I/O requests.
摘要翻译：公开了一种基于策略的I / O调度程序，其拦截对共享存储系统（例如RAID阵列）进行的多个单独卷的I / O请求，并管理这些I / O请求，以使单个卷独占I / O 带宽，并排除其他卷及时完成自己的I / O请求。还公开了可以分配给共享磁盘阵列的每个卷的多个属性，以有效地管理卷中的磁盘阵列的共享。 I / O策略管理器可以处理来自多个来源的I / O请求，包括基于卷的iSCSI I / O请求以及基于文件共享的XFS I / O请求。

5. 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。

6. 发明授权

US09430367B1 Systems and methods for active raid 有权
标题翻译：主动袭击的系统和方法
公开(公告)号：US09430367B1
公开(公告)日：2016-08-30
申请号：US13450378
申请日：2012-04-18
申请人： Srikumar Subramanian , Senthilkumar Ramasamy , Loganathan Ranganathan , Udita Chatterjee
发明人： Srikumar Subramanian , Senthilkumar Ramasamy , Loganathan Ranganathan , Paresh Chatterjee
IPC分类号： G06F12/02 , G06F11/20
CPC分类号： G06F12/02 , G06F11/1076 , G06F11/2082 , G06F11/2089 , G06F11/2094
摘要： A first RAID module is added to a first RAID controller and a second RAID module is added to a second RAID controller. An array of physical disks is partitioned into two partitions across the array of physical disks. The first partition is assigned to the first RAID module and the second partition is exposed to the second RAID module. Each of the RAID modules exposes their respective partitions to their associated RAID controller as a single array. Each RAID module further receives I/O from its respective RAID controller, and translates the I/O to access its associated partition.
摘要翻译：将第一个RAID模块添加到第一个RAID控制器，第二个RAID模块被添加到第二个RAID控制器。物理磁盘阵列在物理磁盘阵列上分为两个分区。第一个分区被分配给第一个RAID模块，第二个分区暴露给第二个RAID模块。每个RAID模块将其各自的分区作为单个阵列公开到其关联的RAID控制器。每个RAID模块还从其相应的RAID控制器接收I / O，并转换I / O以访问其关联的分区。

7. 发明授权

US09053073B1 Use of timestamp logic in synchronous replication 有权
标题翻译：在同步复制中使用时间戳逻辑
公开(公告)号：US09053073B1
公开(公告)日：2015-06-09
申请号：US13449567
申请日：2012-04-18
申请人： Srikumar Subramanian , Raja Jayaraman , Jomy Maliakal , Udita Chatterjee
发明人： Srikumar Subramanian , Raja Jayaraman , Jomy Maliakal , Paresh Chatterjee
IPC分类号： G06F11/00 , G06F11/20
CPC分类号： G06F11/2082 , G06F11/2064 , G06F11/2076 , G06F2201/835
摘要： Systems and methods for maintaining data consistency across mirrored storage nodes. Data consistency may be maintained in networked storage environments using a timestamp of an I/O in the primary and secondary servers (also referred to as nodes) in synchronous replication to re-synchronize the data efficiently, without much performance drop and while reducing the memory footprint. According to an aspect presented herein, data consistency is maintained in a mirror node by timestamping the I/O for a volume's logical territory in both the primary and secondary nodes. The timestamp acts as a watermark. Thus, whenever a disaster or failure occurs, the watermark point determines the re-synchronization point.
摘要翻译：用于在镜像存储节点之间维护数据一致性的系统和方法。数据一致性可以在网络存储环境中使用同步复制中的主服务器和辅助服务器（也称为节点）中的I / O的时间戳保持有效地重新同步数据，而无需多少性能下降并减少内存脚印。根据本文提供的方面，通过对主节点和次节点中的卷的逻辑区域进行I / O的时间戳维持在镜像节点中的数据一致性。时间戳作为水印。因此，每当发生灾难或故障时，水印点确定重新同步点。

8. 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。

9. 发明授权

US08711851B1 Multi-protocol data transfers 有权
标题翻译：多协议数据传输
公开(公告)号：US08711851B1
公开(公告)日：2014-04-29
申请号：US12175914
申请日：2008-07-18
申请人： Shankar Subramonian , Anandh Mahalingam , Srikumar Subramanian , Jomy Maliakal
发明人： Shankar Subramonian , Anandh Mahalingam , Srikumar Subramanian , Jomy Maliakal
IPC分类号： H04J3/24
CPC分类号： H04L1/08 , H04L43/0829 , H04L43/0864 , H04L43/0888 , H04L69/165 , H04L69/18
摘要： Technologies are described herein for performing a multi-protocol data transfer. A first protocol that guarantees reliability and in-order delivery of data packets is utilized to transmit control information for a data transfer. Once the control information has been transmitted and received at the destination, a second protocol is utilized to transfer the actual data. The second protocol does not guarantee data reliability or in-order delivery. If any data packets are not delivered to the destination using the second protocol, either the first protocol, the second protocol, or a combination can be utilized to retransmit the missing packets.
摘要翻译：这里描述了用于执行多协议数据传输的技术。用于保证数据分组的可靠性和按顺序传送的第一协议被用于传送用于数据传输的控制信息。一旦在目的地发送和接收了控制信息，则利用第二协议来传送实际数据。第二个协议不保证数据的可靠性或按顺序的传送。如果任何数据分组没有使用第二协议传送到目的地，则可以利用第一协议，第二协议或组合来重传丢失的分组。

10. 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。

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