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1. 发明授权

US10114566B1 Systems, devices and methods using a solid state device as a caching medium with a read-modify-write offload algorithm to assist snapshots 有权
公开(公告)号：US10114566B1
公开(公告)日：2018-10-30
申请号：US15145878
申请日：2016-05-04
申请人： American Megatrends, Inc.
发明人： Paresh Chatterjee , Srikumar Subramanian , Senthilkumar Ramasamy , Narayanaswami Ganapathy
IPC分类号： G06F3/06 , G06F12/0831 , G06F12/0806 , G06F12/128
摘要： A method for offloading RMW operations on a volume of a storage system to a caching medium includes providing an SSD cache, a data structure for managing the SSD cache and cache headers for managing cache lines. The method also includes maintaining cache headers for cache lines corresponding to a same chunk of the volume as a group, creating a snapshot of the volume and, after creating the snapshot, receiving a write I/O operation directed to a portion of the same chunk. The method further includes allocating a new RMW header for the write I/O operation, maintaining the new RMW header in a new group, performing the write I/O operation on the SSD cache, allocating an old RMW header for the group, maintaining the old RMW header with the group and providing a link between the new and old RMW headers.

2. 发明授权

US10055354B1 Systems, devices and methods using a solid state device as a caching medium with a hashing algorithm to maintain sibling proximity 有权
公开(公告)号：US10055354B1
公开(公告)日：2018-08-21
申请号：US15145874
申请日：2016-05-04
申请人： American Megatrends, Inc.
发明人： Paresh Chatterjee , Srikumar Subramanian , Narayanaswami Ganapathy , Venugopalreddy Mallavaram
IPC分类号： G06F12/08 , G06F3/06 , G06F12/0873 , G06F12/122 , G06F12/128
CPC分类号： G06F12/0873 , G06F12/0864 , G06F2212/1056 , G06F2212/222 , G06F2212/262 , G06F2212/312 , G06F2212/604
摘要： A method for managing a caching medium for a storage system includes providing an SSD cache including a plurality of cache lines, providing a data structure including a plurality of buckets for managing the SSD cache, and providing a plurality of cache headers for managing the cache lines. Each cache line has a first predetermined size, and each bucket corresponds to a contiguous region of a physical storage capacity having a second predetermined size. Each cache header associates a cache line and a corresponding data block stored in the data storage system. The method also includes assigning two or more cache headers for cache lines associated with corresponding data blocks stored in a same contiguous region of the physical storage capacity to a same bucket, and maintaining the two or more cache headers as a first group of cache headers within the same bucket.

3. 发明授权

US10467075B1 Systems, devices and methods for predicting disk failure and minimizing data loss 有权
公开(公告)号：US10467075B1
公开(公告)日：2019-11-05
申请号：US16270368
申请日：2019-02-07
申请人： American Megatrends, Inc.
发明人： Paresh Chatterjee , Anandh Mahalingam , Narayanaswami Ganapathy , Venugopalreddy Mallavaram
IPC分类号： G06F11/07 , G06F3/06 , G06F11/32 , G06F11/10 , G06F11/30 , G06F11/20
摘要： A computer-implemented method for predicting a risk of disk failure is described herein. The method can include collecting a performance parameter for respective disks in a group of disks, and calculating an expected value of the performance parameter for the group of disks. The method can also include comparing a respective value of the performance parameter for a respective disk in the group of disks to the expected value, and predicting a risk of disk failure based on the comparison. For example, when a difference between the respective value of the performance parameter for the respective disk and the expected value exceeds a threshold, the respective disk may be at risk of failing.

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

US10108344B1 Systems, devices and methods using a solid state device as a caching medium with an SSD filtering or SSD pre-fetch algorithm 有权
公开(公告)号：US10108344B1
公开(公告)日：2018-10-23
申请号：US15145099
申请日：2016-05-03
申请人： American Megatrends, Inc.
发明人： Paresh Chatterjee , Srikumar Subramanian , Narayanaswami Ganapathy , Senthilkumar Ramasamy
IPC分类号： G06F12/00 , G06F13/00 , G06F13/28 , G06F3/06 , G06F12/0862
摘要： A method for determining when to load read I/O operations into an SSD cache medium for a physical storage medium of a data storage system can include maintaining an SSD filter bitmap with a plurality of bits, where each of the bits corresponds to a respective data block of the physical storage medium. The method can also include initially setting each of the bits to a first predetermined value, receiving a first read I/O operation directed to a particular data block of the physical storage medium and, in response to receiving the first read I/O operation, setting a bit corresponding to the particular data block to a second predetermined value. The method can further include receiving a second read I/O operation directed to the particular data block and, in response to receiving the second I/O operation, loading data for the particular data block into the SSD cache medium.

6. 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.

7. 发明授权

US09148815B2 Systems and methods for routing cellular network calls or data using a communications device 有权
标题翻译：使用通信设备路由蜂窝网络呼叫或数据的系统和方法
公开(公告)号：US09148815B2
公开(公告)日：2015-09-29
申请号：US13832000
申请日：2013-03-15
申请人： American Megatrends, Inc.
发明人： Narayanaswami Ganapathy
IPC分类号： H04W40/00 , H04W28/02 , H04W88/04
CPC分类号： H04W28/0205 , H04W88/04
摘要： A method, system and apparatus for providing better cellular network coverage and establishing a new cellular network technology infrastructure are provided. A representative apparatus is a communications device that includes a processing device, memory, a transceiver, and a miniature cellular tower unit. The memory includes a routing manager which has instructions that are executed by the processing device. The instructions include logics that facilitate making and receiving cellular network calls from and to the communications device. The transceiver transmits and receives radio frequency (RF) signals to and from a cellular tower and to and from at least one other communications device. The miniature cellular tower unit routes RF signals from the at least one other communications device to the cellular tower.
摘要翻译：提供了一种用于提供更好的蜂窝网络覆盖和建立新的蜂窝网络技术基础设施的方法，系统和装置。代表性装置是包括处理装置，存储器，收发器和微型蜂窝式塔架单元的通信装置。存储器包括具有由处理设备执行的指令的路由管理器。这些指令包括便于从通信设备发送和接收蜂窝网络呼叫的逻辑。收发器向蜂窝塔和从至少一个其他通信设备发射和接收射频（RF）信号。微型蜂窝塔单元将RF信号从至少一个其他通信设备传送到蜂窝塔。

8. 发明授权

US08667330B1 Information lifecycle management assisted synchronous replication 有权
标题翻译：信息生命周期管理协助同步复制
公开(公告)号：US08667330B1
公开(公告)日：2014-03-04
申请号：US13647059
申请日：2012-10-08
申请人： American Megatrends, Inc.
发明人： Paresh Chatterjee , Narayanan Balakrishnan , Narayanaswami Ganapathy , Jomy Jose Maliakal
IPC分类号： G06F11/08
CPC分类号： G06F17/30008 , G06F11/1662 , G06F11/2094 , G06F2201/82 , G06F2201/84
摘要： Technologies are described herein for providing information lifecycle management (ILM)-assisted synchronous replication between a first storage server having a first current state and a second storage server having a second current state. For example, a notification is received at the first storage server that indicates the second storage server has resumed operations following a failure that occurred at a failure time. At this time, the first storage server is in the first current state and the second storage server is in the second current state that is different than the first current state. Then, ILM data for the first storage server is retrieved, and at least one block of data on the first storage server that was accessed after the failure time is identified. After identifying the at least one block of data, the identified block of data is re-synchronized between the first storage server and the second storage server.
摘要翻译：这里描述了在具有第一当前状态的第一存储服务器和具有第二当前状态的第二存储服务器之间提供信息生命周期管理（ILM）辅助同步复制的技术。例如，在第一存储服务器处接收到指示第二存储服务器在故障发生的故障之后恢复操作的通知。此时，第一存储服务器处于第一当前状态，第二存储服务器处于与第一当前状态不同的第二当前状态。然后，检索第一存储服务器的ILM数据，并且识别在故障时间之后被访问的第一存储服务器上的至少一个数据块。在识别出至少一个数据块之后，所识别的数据块在第一存储服务器和第二存储服务器之间被重新同步。

9. 发明授权

US10176103B1 Systems, devices and methods using a solid state device as a caching medium with a cache replacement algorithm 有权
公开(公告)号：US10176103B1
公开(公告)日：2019-01-08
申请号：US15145883
申请日：2016-05-04
申请人： American Megatrends, Inc.
发明人： Paresh Chatterjee , Srikumar Subramanian , Senthilkumar Ramasamy , Narayanaswami Ganapathy
IPC分类号： G06F12/0866
摘要： An example method for performing cache replacement in a caching medium for a data storage system can include providing an SSD cache, providing an LRU data structure including buckets for managing the SSD cache, and providing cache headers for managing the cache lines. The method can include assigning two or more cache headers to a same bucket of the LRU data structure, and arranging the cache headers in a linked list based on access time. A cache header for an LRU cache line is a tail node of the linked list. The method can further include providing an LFU data structure including frequency buckets, assigning the tail node of the linked list of the same bucket of the LRU data structure to a frequency bucket based on access frequency, and selecting an LFU cache line for cache replacement using the LFU data structure.

10. 发明申请

US20140274071A1 SYSTEMS AND METHODS FOR ROUTING CELLULAR NETWORK CALLS OR DATA USING A COMMUNICATIONS DEVICE 有权
标题翻译：用于使用通信设备来路由细胞网络呼叫或数据的系统和方法
公开(公告)号：US20140274071A1
公开(公告)日：2014-09-18
申请号：US13832000
申请日：2013-03-15
申请人： American Megatrends, Inc.
发明人： Narayanaswami Ganapathy
IPC分类号： H04W28/02 , H04W88/04
CPC分类号： H04W28/0205 , H04W88/04
摘要： A method, system and apparatus for providing better cellular network coverage and establishing a new cellular network technology infrastructure are provided. A representative apparatus is a communications device that includes a processing device, memory, a transceiver, and a miniature cellular tower unit. The memory includes a routing manager which has instructions that are executed by the processing device. The instructions include logics that facilitate making and receiving cellular network calls from and to the communications device. The transceiver transmits and receives radio frequency (RF) signals to and from a cellular tower and to and from at least one other communications device. The miniature cellular tower unit routes RF signals from the at least one other communications device to the cellular tower.
摘要翻译：提供了一种用于提供更好的蜂窝网络覆盖和建立新的蜂窝网络技术基础设施的方法，系统和装置。代表性装置是包括处理装置，存储器，收发器和微型蜂窝式塔架单元的通信装置。存储器包括具有由处理设备执行的指令的路由管理器。这些指令包括便于从通信设备发送和接收蜂窝网络呼叫的逻辑。收发器向蜂窝塔和从至少一个其他通信设备发射和接收射频（RF）信号。微型蜂窝塔单元将RF信号从至少一个其他通信设备传送到蜂窝塔。

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