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1. 发明授权

US10261944B1 Managing file deletions in storage systems 有权
公开(公告)号：US10261944B1
公开(公告)日：2019-04-16
申请号：US15083687
申请日：2016-03-29
申请人： EMC Corporation
发明人： Philippe Armangau , Jean-Pierre Bono
IPC分类号： G06F17/30 , G06F16/11 , G06F16/23 , G06F16/16
摘要： A method is used in managing file deletions in storage systems. A request to delete a set of replicas of a file of a file system is received. A replica of the file represents a state of the file at a particular prior point in time. A sibling indirect block associated with a portion of the file identified for deletion is identified. The sibling indirect block includes a set of file system blocks. A set of indirect blocks associated with replicas of the file is identified. The sibling indirect block and the set of indirect blocks share a subset of the set of file system blocks where the set of indirect blocks have been identified for deletion. Weight information associated with the subset of the set of file system blocks shared among the set of indirect blocks that have been pending deletion is merged. The set of indirect blocks are processed for deletion concurrently. Metadata of the sibling indirect block is updated with the merged weight information.

2. 发明授权

US10242011B1 Managing truncation of files of file systems 有权
公开(公告)号：US10242011B1
公开(公告)日：2019-03-26
申请号：US14870514
申请日：2015-09-30
申请人： EMC Corporation
发明人： Ivan Basov , William C. Davenport , Philippe Armangau
IPC分类号： G06F17/30 , G06F3/06
摘要： A method is used in managing truncation of files of file systems. A request is received to delete a portion of a file of a file system. A replica of the file is created. The replica represents a state of the file at a particular prior point in time. The replica shares a set of file system blocks of the file with the file. The portion of the file is deleted by updating metadata of the file. The replica of the file is asynchronously deleted in background by de-allocating the set of file system blocks.

3. 发明授权

US10216757B1 Managing deletion of replicas of files 有权
公开(公告)号：US10216757B1
公开(公告)日：2019-02-26
申请号：US14581750
申请日：2014-12-23
申请人： EMC Corporation
发明人： Philippe Armangau , Junping Zhao , Yining Si , Fenghao Zhang , Gang Xie
IPC分类号： G06F17/30
摘要： A method is used in managing deletion of replicas of files. A request to delete a set of replicas of a file of a file system is received. A replica of the file represents a state of the file at a particular prior point in time. A destination replica is identified. A set of file system blocks shared between a replica of the set of replicas and the destination replica is de-allocated by updating metadata of the destination replica. File system blocks associated with the set of replicas are de-allocated. A subset of the file system blocks are de-allocated concurrently.

4. 发明授权

US10127236B1 Filesystem storing file data in larger units than used for metadata 有权
公开(公告)号：US10127236B1
公开(公告)日：2018-11-13
申请号：US13928972
申请日：2013-06-27
申请人： EMC Corporation
发明人： Yingchao Zhou , William C. Davenport , Christopher A. Seibel , Jun Guo , Jia Zhai , Wengang Wang , Philippe Armangau
IPC分类号： G06F12/00 , G06F13/30 , G06F17/30
摘要： A method is provided for storing files in a filesystem of a data storage system. The method includes (a) storing data of each file of a set of files of the filesystem in a set of data allocation units (AUs) of the filesystem on the data storage system, each data AU of the set of data AUs having a common data AU size, and (b) storing metadata pertaining to each file of the set of files in a set of metadata AUs of the filesystem on the data storage system, each metadata AU of the set of metadata AUs having a common metadata AU size, the common data AU size being larger than the common metadata AU size. A computerized apparatus and a computer program product are also provided for performing a method similar to that described above.

5. 发明授权

US09940331B1 Proactive scavenging of file system snaps 有权
公开(公告)号：US09940331B1
公开(公告)日：2018-04-10
申请号：US14319660
申请日：2014-06-30
申请人： EMC Corporation
发明人： Jean-Pierre Bono , Xiaoye Jiang , William C. Davenport , Philippe Armangau , Yingchao Zhou
IPC分类号： G06F17/30
CPC分类号： G06F17/30088 , G06F3/0608 , G06F3/0652 , G06F3/0683
摘要： Improved techniques involve a storage processor proactively scavenging provisioned free blocks in snap container files and punching holes in the scavenged provisioned free blocks. For example, the storage processor may locate provisioned free blocks by accessing container file system metadata. The storage processor may then punch holes, i.e., release ownership of the snap container file on the identified provisioned free blocks. The storage processor may also delete or otherwise invalidate pointers to those blocks in the snap container file's inode.

6. 发明授权

US09846655B1 Managing processing tasks in storage systems 有权
公开(公告)号：US09846655B1
公开(公告)日：2017-12-19
申请号：US14581620
申请日：2014-12-23
申请人： EMC Corporation
发明人： Junping Zhao , Philippe Armangau , Fenghao Zhang , Gang Xie
IPC分类号： G06F12/122 , G06F13/14 , G06F13/00 , G06F12/0871 , G06F13/16 , G06F12/00 , G06F3/06
CPC分类号： G06F3/0604 , G06F3/061 , G06F3/0631 , G06F12/00 , G06F12/0804 , G06F12/0864 , G06F12/0868 , G06F12/0871 , G06F12/123 , G06F12/126 , G06F13/00 , G06F13/14 , G06F13/16 , G06F13/161 , G06F2212/1024
摘要： A method is used in managing processing tasks in storage systems. A set of tasks is received for processing. A type of the set of tasks is identified. Based on the type of the set of tasks, a determination is made as to whether to add data objects associated with the set of tasks to a used object list managed in conjunction of a cache of the system for accessing the data objects associated with the set of tasks. The cache is configured to store the data objects of the storage system. A portion of a memory of the storage system is reserved as the cache.

7. 发明授权

US09606938B1 Managing caches in storage systems 有权
公开(公告)号：US09606938B1
公开(公告)日：2017-03-28
申请号：US14319205
申请日：2014-06-30
申请人： EMC Corporation
发明人： Philippe Armangau , Christopher Seibel , John F. Gillono , Sitaram Pawar
IPC分类号： G06F12/00 , G06F13/00 , G06F13/28 , G06F12/12 , G06F12/08
CPC分类号： G06F12/123 , G06F12/0824 , G06F12/0871 , G06F2212/1016 , G06F2212/313 , G06F2212/463 , G06F2212/502
摘要： A method is used in managing caches in storage systems. A set of block entries is reserved in a reserved block entries list of a storage system. The reserved block entries list is associated with a cache of the storage system configured to store data of the storage system. A portion of a memory of the storage system is reserved as the cache. Based on a criterion, a determination is made whether a cache entry is available for use in the cache of the storage system. Based on the determination, a block entry is selected for use from the reserved block entries list.

8. 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。

9. 发明授权

US09485310B1 Multi-core storage processor assigning other cores to process requests of core-affined streams 有权
标题翻译：分配其他核心的多核存储处理器来处理核心流处理流的请求
公开(公告)号：US09485310B1
公开(公告)日：2016-11-01
申请号：US14580865
申请日：2014-12-23
申请人： EMC Corporation
发明人： Jean-Pierre Bono , John Forecast , Mukesh Gupta , Frederic Corniquet , Philippe Armangau
IPC分类号： G06F15/16 , H04L29/08 , G06F17/30
CPC分类号： H04L67/1097 , G06F17/30197
摘要： A multi-core processor of a network attached storage system processes requests from host computers for services of a file system service. Each core maintains endpoints of respective connection-layer connections to the hosts to affine respective streams of network traffic with the core, and dynamically and preferentially assigns execution threads of the core to process file system service requests of the streams affined with the core. Each core also co-operates with the other cores to dynamically and non-preferentially (a) assign execution threads of the core to process file system service requests of the streams affined with the other cores, and (b) assign execution threads of the other cores to process file system service requests of the streams affined with the core, promoting efficient use of the cores for the processing workload of the file system service.
摘要翻译：网络连接存储系统的多核处理器处理来自主机的请求以获得文件系统服务的服务。每个核心维护到主机的相应连接层连接的端点，以便将核心的相应的网络流量流相互联系，并且动态地且优先地分配核心的执行线程来处理与核心相关的流的文件系统服务请求。每个内核还与其他内核进行动作并非优先地（a）分配核心的执行线程来处理与其他内核相关的流的文件系统服务请求，以及（b）分配其他核心的执行线程核心来处理与核心相关的流的文件系统服务请求，促进用于文件系统服务的处理工作负载的核的有效使用。

10. 发明授权

US09430503B1 Coalescing transactional same-block writes for virtual block maps 有权
标题翻译：为虚拟块映射合并事务相同块写入
公开(公告)号：US09430503B1
公开(公告)日：2016-08-30
申请号：US13929999
申请日：2013-06-28
申请人： EMC Corporation
发明人： Diane M. Delgado , Lawrence Yetto , Alexei Karaban , William C. Davenport , Philippe Armangau
IPC分类号： G06F17/30
CPC分类号： G06F17/30289 , G06F17/301 , G06F17/30227
摘要： A technique for preserving metadata changes in a transaction log involves coalescing metadata changes based on the block of storage in which the metadata to be changed resides. Metadata change information that accompanies a file system command is stored in nodes of a searchable data structure, wherein each node accumulates metadata changes for a respective block of storage. Once all metadata changes are specified in the searchable data structure, or after some threshold number of metadata changes have been stored, the storage processor composes a transaction for each node summarizing the metadata changes and writes the transaction to the transaction log.
摘要翻译：用于在事务日志中保存元数据更改的技术涉及根据要更改的元数据所在的存储块来合并元数据更改。文件系统命令附带的元数据更改信息存储在可搜索数据结构的节点中，其中每个节点累积相应的存储块的元数据改变。一旦在可搜索数据结构中指定了所有元数据更改，或者在已经存储了一些阈值数量的元数据更改之后，存储处理器将为总结元数据更改的每个节点组合事务，并将事务写入事务日志。

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