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1. 发明授权

US09317216B1 SMR auto-tiering 有权
标题翻译： SMR自动分层
公开(公告)号：US09317216B1
公开(公告)日：2016-04-19
申请号：US14137559
申请日：2013-12-20
申请人： EMC Corporation
发明人： Walter A. O'Brien , Thomas E. Linnell
IPC分类号： G06F3/06
CPC分类号： G06F3/0619 , G06F3/0605 , G06F3/0649 , G06F3/065 , G06F3/0653 , G06F3/0659 , G06F3/0676 , G06F3/0685 , G06F12/0253 , G06F2212/702
摘要： A method, computer program product, and computing system for initiating a relocation process to move local data from an SMR-based storage tier within an auto-tiering data system to a different storage tier within the auto-tiering data system. The local data is located within one or more sectors of the SMR-based storage tier. The local data is copied from the SMR-based storage tier to the different storage tier. The one or more sectors of the SMR-based storage tier are unmapped.
摘要翻译：一种用于发起重定位过程以将本地数据从自动分层数据系统内的基于SMR的存储层移动到自动分层数据系统内的不同存储层的方法，计算机程序产品和计算系统。本地数据位于基于SMR的存储层的一个或多个扇区内。本地数据从基于SMR的存储层复制到不同的存储层。基于SMR的存储层的一个或多个扇区未映射。

2. 发明授权

US09864683B1 Managing cache for improved data availability by associating cache pages with respective data objects 有权
公开(公告)号：US09864683B1
公开(公告)日：2018-01-09
申请号：US14501939
申请日：2014-09-30
申请人： EMC Corporation
发明人： Xinlei Xu , Yongjun Wu , Thomas E. Linnell , Xiongcheng Li
IPC分类号： G06F12/08 , G06F3/06 , G06F12/02 , G06F12/0808
CPC分类号： G06F12/0808 , G06F3/0619 , G06F3/0665 , G06F3/0689 , G06F11/00 , G06F12/0246 , G06F12/0804 , G06F12/0866 , G06F2212/1032 , G06F2212/222 , G06F2212/262 , G06F2212/285 , G06F2212/463 , G06F2212/466 , G06F2212/7207 , G06F2212/7209
摘要： A technique for managing a cache in a data storage system includes creating metadata that associates cache pages with respective data objects and storing the metadata in a location accessible to a manager of the cache. Upon a failure in the cache, the cache manager checks the metadata to identify any data objects for which the cache stores dirty pages. The cache manager then coordinates with other system resources to take the identified data objects offline.

3. 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。

4. 发明授权

US11061814B1 Managing data storage caching and tiering 有权
公开(公告)号：US11061814B1
公开(公告)日：2021-07-13
申请号：US14039463
申请日：2013-09-27
申请人： EMC Corporation
发明人： Walter A. O'Brien, III , Thomas E. Linnell
IPC分类号： G06F12/02 , G06F3/06
摘要： There is disclosed a technique for use in managing data storage in a data storage system. A first metric indicative of a specified wear rate for a flash drive is determined where the flash drive has a first portion allocated as logical space and a second portion allocated as over-provisioning space. An allocation ratio indicative of the ratio between the first portion and the second portion is determined. The allocation ration is dynamically adjusted to cause the current wear rate to change.

5. 发明授权

US09864533B2 SMR auto-tiering 有权
公开(公告)号：US09864533B2
公开(公告)日：2018-01-09
申请号：US15082686
申请日：2016-03-28
申请人： EMC Corporation
发明人： Walter A. O'Brien , Thomas E. Linnell
IPC分类号： G06F3/06 , G06F12/02
CPC分类号： G06F3/0619 , G06F3/0605 , G06F3/0649 , G06F3/065 , G06F3/0653 , G06F3/0659 , G06F3/0676 , G06F3/0685 , G06F12/0253 , G06F2212/702
摘要： A method, computer program product, and computing system for initiating a relocation process to move local data from an SMR-based storage tier within an auto-tiering data system to a different storage tier within the auto-tiering data system. The local data is located within one or more sectors of the SMR-based storage tier. The local data is copied from the SMR-based storage tier to the different storage tier. The one or more sectors of the SMR-based storage tier are unmapped.

6. 发明授权

US09571278B1 Encryption key recovery in the event of storage management failure 有权
标题翻译：存储管理失败时加密密钥恢复
公开(公告)号：US09571278B1
公开(公告)日：2017-02-14
申请号：US14059339
申请日：2013-10-21
申请人： EMC Corporation
发明人： John S. Harwood , Thomas E. Linnell , John T. Fitzgerald , Amnon Izhar , Charles E. Arsenault
IPC分类号： H04L9/32 , G06F11/30 , G06F21/00 , H04L9/08 , G06F15/16 , G06F11/14 , G06F12/14
CPC分类号： H04L9/0894 , G06F11/1402 , G06F11/1415 , G06F12/1408 , G06F21/6209
摘要： A data processing system stores encrypted data. Object identifiers are assigned to storage objects, and data encryption keys are assigned to the storage objects. When performing an operation upon a storage object, data encryption key failure may occur due to a corrupt or incorrect key. In this case, a copy of the data encryption key is fetched from a key server. It is possible for the association of the object identifiers with the data encryption keys to become lost or confused, so that the key server may fail to provide the correct key for a specified object identifier. Therefore, an absolute key identifier that is unique across the key server namespace also is stored in association with the object identifier in the storage system and in the key store of the key server, and the absolute key identifier is used as a failsafe for recovery of encrypted data.
摘要翻译：数据处理系统存储加密数据。将对象标识符分配给存储对象，并将数据加密密钥分配给存储对象。当对存储对象执行操作时，由于损坏或不正确的键，可能会发生数据加密密钥失败。在这种情况下，从密钥服务器取出数据加密密钥的副本。对象标识符与数据加密密钥的关联可能会丢失或混淆，从而密钥服务器可能无法为指定的对象标识符提供正确的密钥。因此，密钥服务器命名空间中唯一的绝对密钥标识符也与存储系统中的对象标识符和密钥服务器的密钥存储器相关联地存储，并且绝对密钥标识符被用作恢复加密数据。

7. 发明申请

US20160253116A1 SMR Auto-Tiering 有权
标题翻译： SMR自动分层
公开(公告)号：US20160253116A1
公开(公告)日：2016-09-01
申请号：US15082686
申请日：2016-03-28
申请人： EMC Corporation
发明人： Walter A. O'Brien , Thomas E. Linnell
IPC分类号： G06F3/06 , G06F12/02
CPC分类号： G06F3/0619 , G06F3/0605 , G06F3/0649 , G06F3/065 , G06F3/0653 , G06F3/0659 , G06F3/0676 , G06F3/0685 , G06F12/0253 , G06F2212/702
摘要： A method, computer program product, and computing system for initiating a relocation process to move local data from an SMR-based storage tier within an auto-tiering data system to a different storage tier within the auto-tiering data system. The local data is located within one or more sectors of the SMR-based storage tier. The local data is copied from the SMR-based storage tier to the different storage tier. The one or more sectors of the SMR-based storage tier are unmapped.
摘要翻译：一种用于发起重定位过程以将本地数据从自动分层数据系统内的基于SMR的存储层移动到自动分层数据系统内的不同存储层的方法，计算机程序产品和计算系统。本地数据位于基于SMR的存储层的一个或多个扇区内。本地数据从基于SMR的存储层复制到不同的存储层。基于SMR的存储层的一个或多个扇区未映射。

8. 发明授权

US09037795B1 Managing data storage by provisioning cache as a virtual device 有权
标题翻译：通过将缓存配置为虚拟设备来管理数据存储
公开(公告)号：US09037795B1
公开(公告)日：2015-05-19
申请号：US14085195
申请日：2013-11-20
申请人： EMC Corporation
发明人： Thomas E. Linnell , Walter A. O'Brien, III
IPC分类号： G06F11/20 , G06F12/08 , G06F11/10
CPC分类号： G06F12/0866 , G06F11/1088 , G06F11/2082
摘要： There is disclosed herein techniques for use in managing data storage in a data storage system comprising a cache and data storage devices. In one embodiment, the technique comprises setting a hot spare capacity value for a virtual hot spare device in a data storage system. The technique also comprises detecting the state of data storage devices in a RAID configuration in the data storage system. The technique further comprises determining if a cache in the data storage system has free capacity corresponding to the hot spare capacity value in response to detecting a failure state in connection with at least one of the data storage devices in the RAID configuration. The technique still further comprises provisioning at least a portion of the cache as the virtual hot spare device with a capacity corresponding to the hot spare capacity value in response to determining the cache has free capacity corresponding to the hot spare capacity value.
摘要翻译：这里公开了用于管理包括高速缓存和数据存储设备的数据存储系统中的数据存储的技术。在一个实施例中，该技术包括在数据存储系统中设置虚拟热备用设备的热备用容量值。该技术还包括检测数据存储系统中的RAID配置中的数据存储设备的状态。该技术还包括响应于检测到与RAID配置中的至少一个数据存储设备相关联的故障状态，确定数据存储系统中的高速缓存是否具有与热备用容量值相对应的空闲容量。该技术还包括响应于确定高速缓存具有对应于热备用容量值的空闲容量，将具有对应于热备用容量值的容量的高速缓存的至少一部分配置为虚拟热备用设备。

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