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1. 发明授权

US09405626B1 At risk data caching (ARDC) 有权
标题翻译：在风险数据缓存（ARDC）
公开(公告)号：US09405626B1
公开(公告)日：2016-08-02
申请号：US14137575
申请日：2013-12-20
申请人： EMC Corporation
发明人： Robert P. Foley , Daniel E. Cummins , Peter Puhov , David W. Harvey , Marc C. Cassano
IPC分类号： G06F11/00 , G06F11/10
CPC分类号： G06F11/1088
摘要： A method, computer program product, and computing system for sensing the occurrence of an degraded condition within a data stripe of a RAID array. The data strip includes one or more valid data portions, one invalid data portion, and a parity portion. A request to write updated content to a target data portion within the data stripe is received, wherein the target data portion is one of the valid data portions. The valid data portions and the parity portion are read from the data stripe. The invalid data portion is reconstructed using the valid data portions and the parity portion, thus generating a reconstructed data portion. The reconstructed data portion is stored within a mirrored cache memory system. The parity portion is updated to define the updated content, thus defining an updated parity portion. The updated parity portion is written to the data stripe and the updated content is written to the target data portion within the data stripe.
摘要翻译：一种用于感测RAID阵列的数据条带内的恶化状况的发生的方法，计算机程序产品和计算系统。数据条包括一个或多个有效数据部分，一个无效数据部分和奇偶校验部分。接收向数据条带中的目标数据部分写入更新内容的请求，其中目标数据部分是有效数据部分之一。从数据条带读取有效的数据部分和奇偶校验部分。使用有效数据部分和奇偶校验部分重建无效数据部分，从而生成重构数据部分。重建的数据部分存储在镜像缓存存储器系统内。奇偶校验部分被更新以定义更新的内容，从而定义更新的奇偶校验部分。将更新的奇偶校验部分写入数据条带，并将更新的内容写入数据条带内的目标数据部分。

2. 发明授权

US09367405B1 Managing software errors in storage systems 有权
标题翻译：管理存储系统中的软件错误
公开(公告)号：US09367405B1
公开(公告)日：2016-06-14
申请号：US13804506
申请日：2013-03-14
申请人： EMC Corporation
发明人： Robert P. Foley , Peter Puhov , Marc C. Cassano , Daniel E. Cummins , David W. Harvey
IPC分类号： G06F11/14
CPC分类号： G06F11/2092 , G06F11/1415 , G06F11/142
摘要： A method is used in managing software errors in storage systems. It is detected that a first processor of a storage system has a problem performing an I/O on a logical object. The first processor has a first path to the logical object. The problem includes a software error. Whether responsibility of performing the I/O on the logical object is transferred to a second processor of the storage system is evaluated. The second processor has a second path to the logical object.
摘要翻译：一种方法用于管理存储系统中的软件错误。检测到存储系统的第一处理器在逻辑对象上执行I / O的问题。第一个处理器具有逻辑对象的第一条路径。问题包括软件错误。评估对逻辑对象执行I / O的责任是否被传送到存储系统的第二处理器。第二处理器具有到逻辑对象的第二路径。

3. 发明授权

US09558068B1 Recovering from metadata inconsistencies in storage systems 有权
标题翻译：从存储系统中的元数据不一致性中恢复
公开(公告)号：US09558068B1
公开(公告)日：2017-01-31
申请号：US14231075
申请日：2014-03-31
申请人： EMC Corporation
发明人： Jean-Pierre Bono , Philippe Armangau , Daniel E. Cummins , David W. Harvey
IPC分类号： G06F11/00 , G06F11/14 , G06F3/06 , G06F17/30
CPC分类号： G06F11/1412 , G06F3/0619 , G06F3/0653 , G06F3/0689 , G06F11/00 , G06F11/1402 , G06F17/30129
摘要： A method is used in recovering from metadata inconsistencies in storage systems. A metadata inconsistency is detected in a portion of a file system. The file system is managed by upper-layer component. The portion of the file system is recovered. Lower-layer component recovers the portion of the file system. The portion of the file system is validated. The upper-layer component validates the portion of the file system.
摘要翻译：一种方法用于从存储系统中的元数据不一致性中恢复。在文件系统的一部分中检测到元数据不一致。文件系统由上层组件管理。文件系统的一部分被恢复。下层组件恢复文件系统的一部分。文件系统的部分被验证。上层组件验证文件系统的部分。

4. 发明授权

US09348761B1 Weighted-value consistent hashing for balancing device wear 有权
标题翻译：加权值一致的哈希用于平衡设备磨损
公开(公告)号：US09348761B1
公开(公告)日：2016-05-24
申请号：US14319084
申请日：2014-06-30
申请人： EMC Corporation
发明人： Daniel E. Cummins , Thomas E. Linnell
IPC分类号： G06F12/02 , G06F12/10
CPC分类号： G06F3/0605 , G06F3/0616 , G06F3/0631 , G06F3/0659 , G06F3/0673 , G06F11/2094 , G06F12/1018 , G06F2212/7201
摘要： Described are techniques that select a physical storage device for storing data. Device weights for physical storage devices are determined in accordance with factor(s) including a storage capacity each physical storage device and an amount of remaining write capacity of each physical storage device representing an amount of remaining writes for an expected lifetime of each physical storage device. A replica set is determined for each physical storage device in accordance with a device weight. Hash value sets are determined for the physical storage devices using a hash function. A first hash value for a first data item is determined using the hash function. The first hash value is mapped to a second hash value included in one of hash value sets associated with a corresponding one of the physical storage devices. The corresponding one of the physical storage devices is selected to store the first data item.
摘要翻译：描述了选择用于存储数据的物理存储设备的技术。物理存储设备的设备权重根据每个物理存储设备的存储容量和每个物理存储设备的剩余写入容量的因素来确定，以表示每个物理存储设备的期望寿命的剩余写入量。根据设备重量为每个物理存储设备确定副本集。使用散列函数为物理存储设备确定散列值集。使用散列函数确定第一数据项的第一哈希值。第一哈希值被映射到与物理存储设备中的对应的一个相关联的哈希值集合之一中包括的第二哈希值。选择相应的一个物理存储设备来存储第一数据项。

5. 发明授权

US10353771B1 Managing data storage 有权
公开(公告)号：US10353771B1
公开(公告)日：2019-07-16
申请号：US14230583
申请日：2014-03-31
申请人： EMC Corporation
发明人： Marc C. Cassano , Robert P. Foley , Daniel E. Cummins , Socheavy D Heng
IPC分类号： G06F11/10
摘要： There are disclosed computer-implemented methods, apparatus, and computer program products for managing data storage. In one embodiment, the computer-implemented method comprises the step of receiving new data to be written to storage. The method also comprises the step determining that the new data does not form a full stripe of data. The method also comprises reading missing non-parity data in the stripe of data. The method further comprises determining new parity based on the new data and the missing non-parity data. The method still further comprises writing the new data and the new parity to storage in a manner that does not require the missing non-parity data to be written to storage.

6. 发明授权

US10235104B1 IO request system and method 有权
公开(公告)号：US10235104B1
公开(公告)日：2019-03-19
申请号：US14871803
申请日：2015-09-30
申请人： EMC CORPORATION
发明人： Robert P. Foley , Peter Puhov , David W. Harvey , Daniel E. Cummins , Marc C. Cassano , Henry A. Spang, IV
IPC分类号： G06F3/06 , G06F13/10
摘要： A method, computer program product, and computing system for receiving an IO request for a RAID array. An actual queue depth of the RAID array is compared to a maximum queue depth for the RAID array. An IO queue weight is determined for the IO request. The IO queue weight is revised based upon a degrade mode condition for the RAID array, thus defining a revised IO queue weight. The actual queue depth is incremented based upon the revised IO queue weight.

7. 发明授权

US09244632B1 Data storage system configuration 有权
标题翻译：数据存储系统配置
公开(公告)号：US09244632B1
公开(公告)日：2016-01-26
申请号：US13929070
申请日：2013-06-27
申请人： EMC Corporation
发明人： Robert P. Foley , Peter Puhov , Marc C. Cassano , Ronald D. Proulx , Daniel E. Cummins
IPC分类号： G06F12/00 , G06F13/00 , G06F13/28 , G06F3/06
CPC分类号： G06F3/0689 , G06F3/0604 , G06F3/0614 , G06F3/0632 , G06F3/0638 , G06F3/0653 , G06F3/0683 , G06F9/4401 , G06F9/4411
摘要： Described are techniques for booting a data storage system. A first set of configuration and state information is read from first storage devices of a first RAID group using special processing code and a RAID library. A first set of system objects (of a system object topology) are instantiated using the first set of information. The first set of system objects represent storage entities containing a second set of configuration and state information. Using an I/O runtime stack based on the system object topology, the second set of information is read from second storage devices of a second RAID group using the same RAID library having calls made from method(s) of a RAID group object representing the second RAID group. A second set of client objects, instantiated using the second set of information, represent storage entities including client data stored on third storage devices of a third RAID group.
摘要翻译：描述了用于引导数据存储系统的技术。使用特殊处理代码和RAID库从第一RAID组的第一存储设备读取第一组配置和状态信息。使用第一组信息来实例化第一组系统对象（系统对象拓扑）。第一组系统对象表示包含第二组配置和状态信息的存储实体。使用基于系统对象拓扑的I / O运行时堆栈，从第二RAID组的第二存储设备读取第二组信息，该第二组信息使用相同的RAID库，该库具有代表所述系统对象拓扑的RAID组对象的方法第二RAID组。使用第二组信息实例化的第二组客户端对象表示存储实体，包括存储在第三RAID组的第三存储设备上的客户端数据。

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