公开(公告)号：US20180285198A1

公开(公告)日：2018-10-04

申请号：US15475100

申请日：2017-03-30

申请人： Pavilion Data Systems, Inc.

发明人： Suhas Dantkale ,  Venkeepuram R. Satish ,  Raghuraman Govindasamy

IPC分类号： G06F11/14 ,  G06F12/0811 ,  G06F12/128 ,  G06F12/1045

CPC分类号： G06F11/1435 ,  G06F11/1451 ,  G06F12/0246 ,  G06F12/0811 ,  G06F12/0868 ,  G06F12/1063 ,  G06F12/128 ,  G06F2201/84 ,  G06F2212/1024 ,  G06F2212/1032 ,  G06F2212/283 ,  G06F2212/285 ,  G06F2212/312 ,  G06F2212/621 ,  G06F2212/681 ,  G06F2212/69 ,  G06F2212/7203

摘要： A storage server includes an IO controller, a management controller and physical drives. The IO controller generates multiple metadata updates and writes a cache entry that includes the multiple metadata updates to a first cache in memory of the management controller. The IO controller additionally writes a copy of the cache entry to a second cache in a memory of the IO controller and increments a commit pointer in the first and second caches to indicate that the metadata updates are committed.

公开(公告)号：US20170109284A1

公开(公告)日：2017-04-20

申请号：US14918408

申请日：2015-10-20

申请人： INTERNATIONAL BUSINESS MACHINE CORPORATION

发明人： Kevin J. Ash ,  Matthew G. Borlick ,  Lokesh M. Gupta ,  Matthew J. Kalos ,  Brian A. Rinaldi

IPC分类号： G06F12/08

CPC分类号： G06F12/0815 ,  G06F12/0868 ,  G06F12/0873 ,  G06F12/123 ,  G06F2212/1032 ,  G06F2212/285 ,  G06F2212/462 ,  G06F2212/608

摘要： Provided are a computer program product, system, and method for populating a second cache with tracks from a first cache when transferring management of the tracks from a first node to a second node. Management of a first group of tracks in the storage managed by the first node is transferred to the second node managing access to a second group of tracks in the storage. After the transferring the management of the tracks, the second node manages access to the first and second groups of tracks and caches accessed tracks from the first and second groups in the second cache of the second node. The second cache of the second node is populated with the tracks in a first cache of the first node

公开(公告)号：US20170109283A1

公开(公告)日：2017-04-20

申请号：US14883382

申请日：2015-10-14

申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION

发明人： Kevin J. Ash ,  Lokesh M. Gupta ,  Matthew J. Kalos

IPC分类号： G06F12/08

CPC分类号： G06F12/0815 ,  G06F9/4401 ,  G06F9/4418 ,  G06F12/0868 ,  G06F12/0873 ,  G06F2212/1032 ,  G06F2212/281 ,  G06F2212/285 ,  G06F2212/312 ,  G06F2212/313 ,  G06F2212/462 ,  G06F2212/604 ,  G06F2212/608

摘要： A storage system, maintains a cache and a non-volatile storage. Active tracks in the non-volatile storage are determined. The determined active tracks in the non-volatile storage are validated between the cache and the non-volatile storage during a warmstart recovery.

公开(公告)号：US09122629B2

公开(公告)日：2015-09-01

申请号：US13605254

申请日：2012-09-06

申请人： Debal K. Mridha ,  Luca Bert

发明人： Debal K. Mridha ,  Luca Bert

IPC分类号： G06F12/08 ,  G06F11/10

CPC分类号： G06F11/108 ,  G06F12/0871 ,  G06F2211/1009 ,  G06F2211/1059 ,  G06F2212/222 ,  G06F2212/283 ,  G06F2212/285 ,  G06F2212/311 ,  G06F2212/403 ,  G06F2212/7208

摘要： The invention provides an elastic or flexible SSD cache utilizing a hybrid RAID protocol combining RAID-0 protocol for read data and RAID-5 single parity protocol for write data in the same cache array. Read data may be stored in window sized allocations using RAID-0 protocol to avoid allocating an entire RAID stripe for read cache data. In the same SSD volume, dirty write data is stored in row allocations using RAID-5 protocol to provide single parity for the dirty write data. Read data is typically stored a window from the physical device having the largest number of available windows. Write data is stored in a row including the next available window in each arm, which decouples the window structure of the rows from the stripe configuration of the physical memory devices.

摘要翻译： 本发明提供了一种弹性或灵活的SSD缓存，其利用组合用于读取数据的RAID-0协议的混合RAID协议和用于在相同高速缓存阵列中写入数据的RAID-5单奇偶校验协议。 读取数据可以使用RAID-0协议存储在窗口大小的分配中，以避免为读取高速缓存数据分配整个RAID条带。 在同一个SSD卷中，使用RAID-5协议将脏写入数据存储在行分配中，为脏写入数据提供单一奇偶校验。 读取数据通常从具有最多可用窗口的物理设备存储在窗口中。 写入数据存储在包括每个臂中的下一个可用窗口的一行中，其将行的窗口结构与物理存储器件的条带配置分离。

公开(公告)号：US20150220438A1

公开(公告)日：2015-08-06

申请号：US14172699

申请日：2014-02-04

申请人： NetApp, Inc.

发明人： Mardiros Chakalian ,  Darrell Suggs ,  Robert Hyer, JR.

IPC分类号： G06F12/08

CPC分类号： G06F3/06 ,  G06F11/00 ,  G06F11/2053 ,  G06F12/0862 ,  G06F12/0868 ,  G06F12/0871 ,  G06F2212/285 ,  G06F2212/601 ,  G06F2212/621

摘要： Examples described herein include a computer system, implemented on a node cluster including at least a first node and a second node. The computer system monitors data access requests received by the first node. Specifically, the computer system monitors data access requests that correspond with operations to be performed on a data volume stored on the second node. The system determines that a number of the data access requests received by the first node satisfies a first threshold amount and, upon making the determination, selectively provisions a cache to store a copy of the data volume on the first node based, at least in part, on a system load of the first node.

摘要翻译： 本文描述的示例包括在包括至少第一节点和第二节点的节点集群上实现的计算机系统。 计算机系统监视由第一节点接收的数据访问请求。 具体而言，计算机系统监视与在第二节点上存储的数据卷上执行的操作相对应的数据访问请求。 该系统确定由第一节点接收到的数据访问请求的数量满足第一阈值量，并且在进行确定时，至少部分地基于第一节点选择性地配置高速缓存以在第一节点上存储数据卷的副本 ，在第一个节点的系统负载上。

公开(公告)号：US08996789B2

公开(公告)日：2015-03-31

申请号：US13411159

申请日：2012-03-02

申请人： Michael T. Benhase ,  Lokesh M. Gupta

发明人： Michael T. Benhase ,  Lokesh M. Gupta

IPC分类号： G06F12/00 ,  G06F12/08

CPC分类号： G06F12/0804 ,  G06F12/0868 ,  G06F12/0897 ,  G06F2212/1016 ,  G06F2212/225 ,  G06F2212/285 ,  G06F2212/312

摘要： Modified tracks for write requests to a sequential access storage medium in a sequential access storage device are cached in a non-volatile storage, which is a faster access device than the sequential access storage medium. A request queue includes destage requests to destage the modified tracks in the non-volatile storage device to the sequential access storage medium and read requests to access read requested tracks from the sequential access storage medium. A comparison is made of a current position of a read/write mechanism with respect to physical locations on the sequential access storage medium of the tracks subject to the destage requests indicated in the request queue. A determination is made of one of the destage requests to process based on the comparison. The modified track for the determined destage request is written from the non-volatile storage device to the sequential access storage medium.

摘要翻译： 用于向顺序访问存储设备中的顺序访问存储介质的写请求的修改轨道被缓存在非易失性存储器中，该非易失性存储器是比顺序访问存储介质更快的访问设备。 请求队列包括将非易失性存储设备中的经修改的轨道去往顺序存取存储介质并读取从顺序访问存储介质访问读请求的轨道的请求的到达请求。 比较读/写机构相对于在请求队列中指示的流出请求的轨道的顺序存取介质上的物理位置的当前位置。 根据比较确定要处理的要求之一。 用于确定的流出请求的经修改的轨道从非易失性存储设备写入顺序存取存储介质。

公开(公告)号：US20130198448A1

公开(公告)日：2013-08-01

申请号：US13362099

申请日：2012-01-31

申请人： Mark Ish ,  Anant Baderdinni ,  Gary J. Smerdon

发明人： Mark Ish ,  Anant Baderdinni ,  Gary J. Smerdon

IPC分类号： G06F12/08

CPC分类号： G06F12/0871 ,  G06F11/1666 ,  G06F11/20 ,  G06F12/0804 ,  G06F2212/1044 ,  G06F2212/222 ,  G06F2212/285

摘要： An apparatus for elastic caching of redundant cache data. The apparatus may have a plurality of buffers and a circuit. The circuit may be configured to (i) receive a write request from a host to store write data in a storage volume, (ii) allocate a number of extents in the buffers based upon a redundant organization associated with the write request and (iii) store the write data in the number of extents, where (a) each of the number of extents is located in a different one of the buffers and (b) the number of extents are dynamically linked together in response to the write request.

摘要翻译： 冗余高速缓存数据的弹性缓存装置。 该装置可以具有多个缓冲器和电路。 电路可以被配置为（i）从主机接收写入请求以将写入数据存储在存储卷中，（ii）基于与写入请求相关联的冗余组织在缓冲器中分配多个扩展区，以及（iii） 将写入数据存储在扩展数量中，其中（a）每个缓冲区的数量位于不同的缓冲区中，并且（b）响应于写请求动态地链接到扩展盘的数目。

公开(公告)号：US09933947B1

公开(公告)日：2018-04-03

申请号：US14984376

申请日：2015-12-30

申请人： EMC IP Holding Company LLC

发明人： Deepak Vokaliga ,  Benjamin Yoder ,  Vadim Longinov ,  George Quill ,  Benoit Joseph Merlet

IPC分类号： G06F3/06 ,  G06F12/08 ,  G06F12/0802

CPC分类号： G06F3/061 ,  G06F3/0617 ,  G06F3/0638 ,  G06F3/065 ,  G06F3/0671 ,  G06F3/0683 ,  G06F11/00 ,  G06F12/0802 ,  G06F12/0895 ,  G06F2212/1016 ,  G06F2212/285 ,  G06F2212/60

摘要： Techniques are described for processing multi-page write operations to maintain write level consistency. A multi-page write spanning multiple cache pages is directed to a target device and received on a first data storage system where writes to the target device are synchronously replicated to a second data storage system. On the first data storage system, each of the multiple cache pages may be synchronously replicated to the second data storage system. A lock on each of the cache pages is not released until an acknowledgement is received regarding successful replication of the cache page. On the second data storage system, requests to replicate the multiple cache pages containing write data of the multi-page write are received and processed using locks of corresponding cache pages on the second data storage system. Such techniques also handle concurrent reads and/or writes. Deadlock detection and resolution processing may be performed for concurrent writes.

公开(公告)号：US09766824B2

公开(公告)日：2017-09-19

申请号：US14767066

申请日：2013-11-26

申请人： Hitachi, Ltd.

发明人： Keiichi Matsuzawa ,  Hitoshi Kamei

IPC分类号： G06F3/06 ,  G06F12/0802 ,  G06F12/084 ,  G06F12/0866 ,  G06F9/455

CPC分类号： G06F3/0619 ,  G06F3/065 ,  G06F3/0655 ,  G06F3/0665 ,  G06F3/067 ,  G06F3/0689 ,  G06F9/45558 ,  G06F12/0802 ,  G06F12/084 ,  G06F12/0866 ,  G06F2009/45562 ,  G06F2009/4557 ,  G06F2009/45583 ,  G06F2212/224 ,  G06F2212/284 ,  G06F2212/285

摘要： When computers and virtual machines operating in the computers both attempt to allocate a cache regarding the data in a secondary storage device to respective primary storage devices, identical data is prevented from being stored independently in multiple computers or virtual machines. An integrated cache management function in the computer arbitrates which computer or virtual machine should cache the data of the secondary storage device, and when the computer or the virtual machine executes input/output of data of the secondary storage device, the computer inquires the integrated cache management function, based on which the integrated cache management function retains the cache only in a single computer, and instructs the other computers to delete the cache. Thus, it is possible to prevent identical data from being cached in a duplicated manner in multiple locations of the primary storage device, and enables efficient capacity usage of the primary storage device.

公开(公告)号：US09602614B1

公开(公告)日：2017-03-21

申请号：US13685607

申请日：2012-11-26

申请人： Amazon Technologies, Inc.

发明人： Nishanth Shankaran ,  Dong Shou ,  Clint Joseph Sbisa ,  Rajaprabhu Thiruchi Loganathan ,  Shyam Krishnamoorthy ,  Rajat Arya

IPC分类号： G06F15/177 ,  H04L29/08 ,  H04L12/803 ,  H04L12/26

CPC分类号： H04L67/2842 ,  G06F12/0806 ,  G06F12/0868 ,  G06F15/177 ,  G06F17/30212 ,  G06F2212/285 ,  G06F2212/314 ,  H04L29/08801 ,  H04L41/0816 ,  H04L41/0856 ,  H04L43/0858 ,  H04L43/087 ,  H04L47/125 ,  H04L67/34

摘要： A cache or other cluster is configuration-aware such that initialization and changes to the underlying structure of the cluster can be dynamically updated for use by a client. A client may use a client driver as an intermediary that is responsible for managing the communication with the cluster. For example, a client driver may resolve an alias from a static configuration endpoint to a storage node. The client driver may request an initial configuration from the storage node and then update configuration from one or more storage nodes that store current configuration of the cluster.