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公开(公告)号:US08561074B2
公开(公告)日:2013-10-15
申请号:US12950887
申请日:2010-11-19
申请人: Ludmila Cherkasova , Xin Zhang , Xiaozhou Li
发明人: Ludmila Cherkasova , Xin Zhang , Xiaozhou Li
IPC分类号: G06F9/46
CPC分类号: G06F11/1448 , G06F9/4881 , G06F11/1461
摘要: Systems and methods of enhanced backup job scheduling are disclosed. An example method may include determining a number of jobs (n) in a backup set, determining a number of tape drives (m) in the backup device, and determining a number of concurrent disk agents (maxDA) configured for each tape drive. The method may also include defining a scheduling problem based on n, m, and maxDA. The method may also include solving the scheduling problem using an integer programming (IP) formulation to derive a bin-packing schedule that minimizes makespan (S) for the backup set.
摘要翻译: 公开了增强备份作业调度的系统和方法。 示例性方法可以包括确定备份集中的多个作业(n),确定备份设备中的磁带驱动器(m)的数量,以及为每个磁带驱动器配置的多个并发磁盘代理(maxDA)。 该方法还可以包括基于n,m和maxDA定义调度问题。 该方法还可以包括使用整数规划(IP)公式解决调度问题,以导出最小化备份集的制造时间(S)的二进制包装调度。
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公开(公告)号:US20110173162A1
公开(公告)日:2011-07-14
申请号:US12687361
申请日:2010-01-14
申请人: Eric A. Anderson , Xiaozhou Li , Mehul A. Shah , John J. Wylie
发明人: Eric A. Anderson , Xiaozhou Li , Mehul A. Shah , John J. Wylie
CPC分类号: G06F11/1076 , G06F2211/104 , G06F2211/1088
摘要: A method is provided for scrubbing information stored in a data storage system where the information is stored as a plurality of encoded fragments across multiple storage devices. The method includes maintaining on a first storage device a list of metadata entries corresponding to values that are stored in the data storage system at an At Maximum Redundancy (AMR) state, verifying that encoded fragments associated with each of the metadata entries are stored on a second storage, verifying that a corresponding metadata entry is stored on the first storage device for each encoded fragment that is stored on the second storage device, and scheduling for recovery any missing encoded fragments and/or any missing metadata entry.
摘要翻译: 提供了一种用于擦除存储在数据存储系统中的信息的方法,其中信息作为多个编码片段存储在多个存储设备中。 该方法包括在第一存储设备上以与At值最大冗余(AMR)状态存储在数据存储系统中的值相对应的元数据条目的列表,验证与每个元数据条目相关联的编码片段被存储在 第二存储器,验证对于存储在第二存储设备上的每个编码片段,相应的元数据条目存储在第一存储设备上,以及调度恢复任何丢失的编码片段和/或任何丢失的元数据条目。
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公开(公告)号:US20100192018A1
公开(公告)日:2010-07-29
申请号:US12359190
申请日:2009-01-23
IPC分类号: G06F11/28
CPC分类号: G06F11/008 , G06F11/28
摘要: A method for measuring consistability of a distributed storage system is disclosed. The method includes determining at least one consistency level that the distributed storage system can provide. A plurality of failure classes can be determined for the distributed storage system. A probability of the distributed storage system to be in each of the plurality of failure classes can be measured. Each failure class can be mapped to the at least one consistency level. The probability of each failure class for each consistency level can be summed to determine an expected portion of time that the distributed storage system provides each consistency level.
摘要翻译: 公开了一种用于测量分布式存储系统的可组合性的方法。 该方法包括确定分布式存储系统可以提供的至少一个一致性级别。 可以为分布式存储系统确定多个故障等级。 可以测量分布式存储系统处于多个故障等级中的每一个中的概率。 每个故障类可以映射到至少一个一致性级别。 可以将每个一致性级别的每个故障类的概率相加以确定分布式存储系统提供每个一致性级别的预期部分时间。
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公开(公告)号:US08707098B2
公开(公告)日:2014-04-22
申请号:US13259221
申请日:2010-01-14
申请人: Eric A. Anderson , Xiaozhou Li , Mehul A. Shah , John J. Wylie
发明人: Eric A. Anderson , Xiaozhou Li , Mehul A. Shah , John J. Wylie
IPC分类号: G06F11/00
CPC分类号: G06F11/2094 , G06F11/106 , G06F2211/1088
摘要: A method of recovering a value in a data storage system includes maintaining a list of entries corresponding to values that have been inserted into the data storage system, determining whether the values are at an At Maximum Redundancy (AMR) state, and if not, the converging the values to the AMR state.
摘要翻译: 恢复数据存储系统中的值的方法包括维护与已经插入到数据存储系统中的值相对应的条目列表,确定值是否处于At最大冗余(AMR)状态,如果不是,则 将值收敛到AMR状态。
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公开(公告)号:US08392805B2
公开(公告)日:2013-03-05
申请号:US12837085
申请日:2010-07-15
申请人: John Johnson Wylie , Xiaozhou Li
发明人: John Johnson Wylie , Xiaozhou Li
CPC分类号: G06F11/1076 , G06F2211/1052 , G06F2211/1059 , H03M13/1191 , H03M13/373
摘要: Erasure-encoded data is stored across a plurality of storage devices in a data storage system. The erasure-encoded data includes k data elements to store on k data storage devices and m parity elements to store on m parity storage devices, wherein for a given minimum Hamming distance d of the data storage system and m≧(d−1), data elements are assigned only to corresponding unique combinations of parity elements of size (d−1).
摘要翻译: 擦除编码数据被存储在数据存储系统中的多个存储设备之间。 擦除编码数据包括存储在k个数据存储装置上的k个数据元素和m个奇偶校验元素以存储在m个奇偶校验存储装置上,其中对于数据存储系统的给定最小汉明距离d和m≥(d-1) 数据元素仅分配给大小(d-1)的奇偶校验元素的对应唯一组合。
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公开(公告)号:US20120017140A1
公开(公告)日:2012-01-19
申请号:US12837085
申请日:2010-07-15
申请人: John Johnson Wylie , Xiaozhou Li
发明人: John Johnson Wylie , Xiaozhou Li
CPC分类号: G06F11/1076 , G06F2211/1052 , G06F2211/1059 , H03M13/1191 , H03M13/373
摘要: Erasure-encoded data is stored across a plurality of storage devices in a data storage system. The erasure-encoded data includes k data elements to store on k data storage devices and m parity elements to store on m parity storage devices, wherein for a given minimum Hamming distance d of the data storage system and m≧(d−1), data elements are assigned only to corresponding unique combinations of parity elements of size (d−1).
摘要翻译: 擦除编码数据被存储在数据存储系统中的多个存储设备之间。 擦除编码数据包括存储在k个数据存储装置上的k个数据元素和m个奇偶校验元素以存储在m个奇偶校验存储装置上,其中对于数据存储系统的给定最小汉明距离d和m≥(d-1) 数据元素仅分配给大小(d-1)的奇偶校验元素的对应唯一组合。
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公开(公告)号:US08589360B2
公开(公告)日:2013-11-19
申请号:US13323577
申请日:2011-12-12
申请人: Xiaozhou Li , Wojciech Golab , Mehul A. Shah
发明人: Xiaozhou Li , Wojciech Golab , Mehul A. Shah
CPC分类号: G06F17/30371
摘要: A method for verifying a consistency level in a key-value store, in which a value is stored in a cloud-based storage system comprising a read/write register identified by a key. At a centralized monitor node, a history of operations including writes and reads performed at the key is created, and a distance between a read of a value at the key and a latest write to the key is determined. It can then be ascertained whether the distance satisfies a relaxed atomicity property.
摘要翻译: 一种验证密钥值存储中的一致性级别的方法,其中值存储在基于云的存储系统中,该存储系统包括由密钥识别的读/写寄存器。 在集中式监视节点处,创建包括在密钥处执行的写入和读取的操作的历史记录,并且确定在键处的读取和对该键的最新写入之间的距离。 然后可以确定距离是否满足松弛的原子性质。
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公开(公告)号:US08458513B2
公开(公告)日:2013-06-04
申请号:US12847203
申请日:2010-07-30
申请人: John J. Wylie , Joseph A. Tucek , Eric A. Anderson , Xiaozhou Li , Mustafa Uysal
发明人: John J. Wylie , Joseph A. Tucek , Eric A. Anderson , Xiaozhou Li , Mustafa Uysal
IPC分类号: G06F11/00
CPC分类号: G06F11/2094 , G06F11/1076
摘要: A method is provided for efficiently recovering information in a distributed storage system where a list of values that should be stored on a storage device is maintained. A first convergence round is scheduled to be performed on the list of values to bring each value to an At Maximum Redundancy (AMR) state. A second convergence round is scheduled to be performed on the list by selecting a wait time interval from a predefined range of wait time intervals between starts of convergence rounds.
摘要翻译: 提供一种用于在分布式存储系统中有效地恢复信息的方法,其中应保存存储在存储设备上的值列表。 第一个收敛轮被安排在值列表上执行,以使每个值达到At Maximum Redundancy(AMR)状态。 通过从收敛轮开始之间的等待时间间隔的预定义范围中选择等待时间间隔,调度在列表上执行第二收敛轮。
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公开(公告)号:US08396936B2
公开(公告)日:2013-03-12
申请号:US12914889
申请日:2010-10-28
申请人: Xiaozhou Li , Joseph A. Tucek
发明人: Xiaozhou Li , Joseph A. Tucek
IPC分类号: G06F15/167
CPC分类号: G06F12/123 , G06F12/0813 , G06F12/0866 , G06F2212/154 , H04L67/2852
摘要: A server receives information that identifies which chunks are stored in local caches at client computers and receives a request to evict a chunk from a local cache of a first one of the client computers. The server determines whether the chunk stored at the local cache of the first one of the client computers is globally oldest among the chunks stored in the local caches at the client computers, and authorizes the first one of the client computers to evict the chunk when the chunk is the globally oldest among the chunks stored in the local caches at the client computers.
摘要翻译: 服务器接收在客户端计算机上识别在本地高速缓存中存储哪些块的信息,并接收从第一个客户端计算机的本地高速缓存驱逐块的请求。 服务器确定存储在第一个客户端计算机的本地高速缓存中的块是否在存储在客户端计算机的本地高速缓存中的块中是全局最旧的,并且授权当第一个客户端计算机驱动该块时 在客户端计算机上存储在本地缓存中的块中,块是全球最大的。
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公开(公告)号:US08181180B1
公开(公告)日:2012-05-15
申请号:US11855682
申请日:2007-09-14
申请人: Eric A. Anderson , Christopher Edward Hoover , Charles E. Christian, Jr. , Tim Reddin , Robert J. Souza , Xiaozhou Li
发明人: Eric A. Anderson , Christopher Edward Hoover , Charles E. Christian, Jr. , Tim Reddin , Robert J. Souza , Xiaozhou Li
IPC分类号: G06F9/46
CPC分类号: G06F9/52
摘要: Embodiments include methods, apparatus, and systems for managing jobs in a shared file system. One embodiment includes a method that intercepts file accesses within a job on a client to a storage device in a shared file system, detects when a file associated with the job changes, and sends the client a message of the change.
摘要翻译: 实施例包括用于管理共享文件系统中的作业的方法,装置和系统。 一个实施例包括将客户端上的作业中的文件访问截取到共享文件系统中的存储设备的方法,检测与作业相关联的文件何时改变,并向客户端发送该更改的消息。
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