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1. 发明授权

US08775786B1 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：US08775786B1
公开(公告)日：2014-07-08
申请号：US13736400
申请日：2013-01-08
申请人： American Megatrends, Inc.
发明人： Paresh Chatterjee , Srikumar Subramanian , Suresh Grandhi , Vijayarankan Muthirisavenugopal
IPC分类号： G06F1/00
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。

2. 发明授权

US10185639B1 Systems and methods for performing failover in storage system with dual storage controllers 有权
公开(公告)号：US10185639B1
公开(公告)日：2019-01-22
申请号：US15143882
申请日：2016-05-02
申请人： American Megatrends, Inc.
发明人： Paresh Chatterjee , Vijayarankan Muthirisavenugopal , Jomy Jose Maliakal , Sharon Samuel Enoch
IPC分类号： G06F11/00 , G06F11/20
摘要： An example computer-implemented method for performing failover operations in a data storage system is described herein. The data storage system can include a first storage controller and a second storage controller for processing input/output (“I/O”) operations for the data storage system. The method can include, in response to a failure of the first storage controller, performing failover operations with the second storage controller, and processing the I/O operations with the second storage controller. The failover operations can include preparing a disk subsystem layer for I/O operations, preparing a device manager layer for the I/O operations, and preparing a network layer for the I/O operations. The disk subsystem, device manager, and network layers can be prepared for the I/O operations without dependencies. In particular, preparation of the network layer is not dependent on preparation of the disk subsystem layer or the device manager layer.

3. 发明授权

US10089227B1 Systems, devices and methods using a solid state device as a caching medium with a write cache flushing algorithm 有权
公开(公告)号：US10089227B1
公开(公告)日：2018-10-02
申请号：US15145111
申请日：2016-05-03
申请人： American Megatrends, Inc.
发明人： Srikumar Subramanian , Vijayarankan Muthirisavenugopal , Anandh Mahalingam , Narayanaswami Ganapathy
IPC分类号： G06F11/00 , G06F12/0804 , G06F3/06 , G06F11/20
摘要： A method for performing cache flushing operations in a data storage system can include maintaining a plurality of SSDs as a cache medium for a data storage medium, controlling a region of the SSDs in a write-back cache mode, and monitoring a status of the SSDs to detect a low-performance condition. In the write-back cache mode, data is mirrored across the SSDs. The method can also include performing normal purge operations on the data stored in the region under a condition that the low-performance condition is not detected, and performing aggressive purge operations on the data stored in the region in response to detecting the low-performance condition. The normal purge operations can include flushing the data stored in the region to the data storage medium. The aggressive purge operations can include sequentially mirroring the data stored in the region to one or more special territories of the data storage medium.

4. 发明申请

US20150012628A1 BOOT ACCELERATION BY CONSOLIDATING CLIENT-SPECIFIC BOOT DATA IN A DATA STORAGE SYSTEM 审中-公开
标题翻译：通过在数据存储系统中整合客户特定引导数据来引导加速
公开(公告)号：US20150012628A1
公开(公告)日：2015-01-08
申请号：US14450855
申请日：2014-08-04
申请人： American Megatrends, Inc.
发明人： Paresh Chatterjee , Vijayarankan Muthirisavenugopal , Narayanaswami Ganapathy , Raghavan Sowrirajan
IPC分类号： 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。

5. 发明授权

US09002794B1 Reclaiming space from a file system 有权
标题翻译：从文件系统中回收空间
公开(公告)号：US09002794B1
公开(公告)日：2015-04-07
申请号：US13960687
申请日：2013-08-06
申请人： American Megatrends, Inc.
发明人： Paresh Chatterjee , Vijayarankan Muthirisavenugopal , Raghavan Sowrirajan
IPC分类号： G06F17/00 , G06F7/00 , G06F17/30
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.
摘要翻译：提供了用于回收耦合到块设备的文件系统的技术。在这些技术中，创建一个虚拟文件。扩展虚拟文件以填充块设备中的卷。检索虚拟文件到卷中的位置的映射。当虚拟文件映射到卷中的位置时，卷中的相应空间被回收。该空间可以包括与虚拟文件的映射相对应的卷中的位置。当卷中的此空间被回收时，虚拟文件将被删除。

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