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    Memory preserved cache to prevent data loss
    1.
    发明授权
    Memory preserved cache to prevent data loss 失效
    内存保存缓存以防止数据丢失

    公开(公告)号：US07975169B2

    公开(公告)日：2011-07-05

    申请号：US12132087

    申请日：2008-06-03

    申请人： Kevin John Ash ,  Michael Thomas Benhase ,  Lokesh Mohan Gupta ,  Alfred Emilio Sanchez ,  Kenneth Wayne Todd

    发明人： Kevin John Ash ,  Michael Thomas Benhase ,  Lokesh Mohan Gupta ,  Alfred Emilio Sanchez ,  Kenneth Wayne Todd

    IPC分类号： G06F11/00

    CPC分类号： G06F12/0804 ,  G06F11/1441 ,  G06F11/1666 ,  G06F11/2023 ,  G06F11/2038 ,  G06F11/2043 ,  G06F12/0866

    摘要： A method, system, and computer program product for preserving data in a storage subsystem having dual cache and dual nonvolatile storage (NVS) through a failover from a failed cluster to a surviving cluster is provided. A memory preserved indicator is initiated to mark tracks on a cache of the surviving cluster to be preserved, the tracks having an image in an NVS of the failed cluster. A destage operation is performed to destage the marked tracks. Subsequent to a determination that each of the marked tracks have been destaged, the memory preserved indicator is disabled to remove the mark from the tracks. If the surviving cluster reboots previous to each of the marked tracks having been destaged, the cache is verified as a memory preserved cache, the marked tracks are retained for processing while all unmarked tracks are removed, and the marked tracks are processed.

    摘要翻译： 提供了一种用于通过从故障集群到存活集群的故障转移来保存具有双缓存和双非易失性存储（NVS）的存储子系统中的数据的方法，系统和计算机程序产品。 启动存储器保存的指示符以标记要保留的存活簇的高速缓存上的轨道，轨道在故障集群的NVS中具有图像。 执行了一个停船操作，以排除标记的轨迹。 在确定每个标记的轨道已经停止之后，禁用存储器保留指示符以从轨道中移除标记。 如果幸存的群集在已经去往每个标记的轨道之前重新启动，则将高速缓存验证为存储器保存的高速缓存，标记的轨道被保留用于处理，而所有未标记的轨道被移除，并且标记的轨道被处理。

    MEMORY PRESERVED CACHE FAILSAFE REBOOT MECHANISM
    2.
    发明申请
    MEMORY PRESERVED CACHE FAILSAFE REBOOT MECHANISM 失效
    内存保存缓存失败机制

    公开(公告)号：US20090300408A1

    公开(公告)日：2009-12-03

    申请号：US12132128

    申请日：2008-06-03

    申请人： Kevin John Ash ,  Michael Thomas Benhase ,  Lokesh Mohan Gupta ,  Alfred Emilio Sanchez ,  Kenneth Wayne Todd

    发明人： Kevin John Ash ,  Michael Thomas Benhase ,  Lokesh Mohan Gupta ,  Alfred Emilio Sanchez ,  Kenneth Wayne Todd

    IPC分类号： G06F11/20

    CPC分类号： G06F11/1417 ,  G06F11/2092

    摘要： A method, system and computer program product for preserving data in a storage subsystem having dual cache and dual nonvolatile storage (NVS) through a failover from a failed cluster to a surviving cluster, the surviving cluster undergoing a rebooting process, is provided. A memory preserved indicator associated with a cache of the surviving cluster is detected. The memory preserved indicator designates marked tracks having an image in an NVS of the failed cluster to be preserved through the rebooting process. A counter in a data structure of the surviving cache is incremented. If a value of the counter exceeds a predetermined value, a cache memory is initialized, and the marked tracks are removed from the cache to prevent an instance of repetitive reboots caused by a corrupted structure in the cache memory.

    摘要翻译： 提供了一种方法，系统和计算机程序产品，用于通过从故障集群到存活集群的故障转移来保存具有双高速缓存和双非易失性存储（NVS）的存储子系统中的数据，所述存活集群经历重新启动过程。 检测与存活簇的高速缓存相关联的存储器保存的指示符。 存储器保存的指示符指定在通过重新启动过程保留的故障集群的NVS中具有图像的标记轨迹。 幸存缓存的数据结构中的计数器增加。 如果计数器的值超过预定值，则初始化高速缓冲存储器，并且从高速缓存中移除标记的轨道，以防止由高速缓冲存储器中的破坏的结构导致的重复重新启动的实例。

    MEMORY PRESERVED CACHE TO PREVENT DATA LOSS
    3.
    发明申请
    MEMORY PRESERVED CACHE TO PREVENT DATA LOSS 失效
    内存保存缓存以防数据丢失

    公开(公告)号：US20090300298A1

    公开(公告)日：2009-12-03

    申请号：US12132087

    申请日：2008-06-03

    申请人： Kevin John Ash ,  Michael Thomas Benhase ,  Lokesh Mohan Gupta ,  Alfred Emilio Sanchez ,  Kenneth Wayne Todd

    发明人： Kevin John Ash ,  Michael Thomas Benhase ,  Lokesh Mohan Gupta ,  Alfred Emilio Sanchez ,  Kenneth Wayne Todd

    IPC分类号： G06F12/00

    CPC分类号： G06F12/0804 ,  G06F11/1441 ,  G06F11/1666 ,  G06F11/2023 ,  G06F11/2038 ,  G06F11/2043 ,  G06F12/0866

    摘要： A method, system, and computer program product for preserving data in a storage subsystem having dual cache and dual nonvolatile storage (NVS) through a failover from a failed cluster to a surviving cluster is provided. A memory preserved indicator is initiated to mark tracks on a cache of the surviving cluster to be preserved, the tracks having an image in an NVS of the failed cluster. A destage operation is performed to destage the marked tracks. Subsequent to a determination that each of the marked tracks have been destaged, the memory preserved indicator is disabled to remove the mark from the tracks. If the surviving cluster reboots previous to each of the marked tracks having been destaged, the cache is verified as a memory preserved cache, the marked tracks are retained for processing while all unmarked tracks are removed, and the marked tracks are processed.

    摘要翻译： 提供了一种用于通过从故障集群到存活集群的故障转移来保存具有双缓存和双非易失性存储（NVS）的存储子系统中的数据的方法，系统和计算机程序产品。 启动存储器保存的指示符以标记要保留的存活簇的高速缓存上的轨道，轨道在故障集群的NVS中具有图像。 执行了一个停船操作，以排除标记的轨迹。 在确定每个标记的轨道已经停止之后，禁用存储器保留指示符以从轨道中移除标记。 如果幸存的群集在已经去往每个标记的轨道之前重新启动，则将高速缓存验证为存储器保存的高速缓存，标记的轨道被保留用于处理，而所有未标记的轨道被移除，并且标记的轨道被处理。

    Memory preserved cache failsafe reboot mechanism
    4.
    发明授权
    Memory preserved cache failsafe reboot mechanism 失效
    内存保存缓存失效安全重启机制

    公开(公告)号：US07895465B2

    公开(公告)日：2011-02-22

    申请号：US12132128

    申请日：2008-06-03

    申请人： Kevin John Ash ,  Michael Thomas Benhase ,  Lokesh Mohan Gupta ,  Alfred Emilio Sanchez ,  Kenneth Wayne Todd

    发明人： Kevin John Ash ,  Michael Thomas Benhase ,  Lokesh Mohan Gupta ,  Alfred Emilio Sanchez ,  Kenneth Wayne Todd

    IPC分类号： G06F11/00

    CPC分类号： G06F11/1417 ,  G06F11/2092

    摘要： A method, system and computer program product for preserving data in a storage subsystem having dual cache and dual nonvolatile storage (NVS) through a failover from a failed cluster to a surviving cluster, the surviving cluster undergoing a rebooting process, is provided. A memory preserved indicator associated with a cache of the surviving cluster is detected. The memory preserved indicator designates marked tracks having an image in an NVS of the failed cluster to be preserved through the rebooting process. A counter in a data structure of the surviving cache is incremented. If a value of the counter exceeds a predetermined value, a cache memory is initialized, and the marked tracks are removed from the cache to prevent an instance of repetitive reboots caused by a corrupted structure in the cache memory.

    摘要翻译： 提供了一种方法，系统和计算机程序产品，用于通过从故障集群到存活集群的故障转移来保存具有双高速缓存和双非易失性存储（NVS）的存储子系统中的数据，所述经历重新启动过程的存活集群。 检测与存活簇的高速缓存相关联的存储器保存的指示符。 存储器保存的指示符指定在通过重新启动过程保留的故障集群的NVS中具有图像的标记轨迹。 幸存缓存的数据结构中的计数器增加。 如果计数器的值超过预定值，则初始化高速缓冲存储器，并且从高速缓存中移除标记的轨道，以防止由高速缓冲存储器中的破坏的结构导致的重复重新启动的实例。

    COPYING DATA FROM A FIRST CLUSTER TO A SECOND CLUSTER TO REASSIGN STORAGE AREAS FROM THE FIRST CLUSTER TO THE SECOND CLUSTER
    5.
    发明申请
    COPYING DATA FROM A FIRST CLUSTER TO A SECOND CLUSTER TO REASSIGN STORAGE AREAS FROM THE FIRST CLUSTER TO THE SECOND CLUSTER 有权
    将数据从第一集群复制到第二集群以将存储区域从第一集群转发到第二集群

    公开(公告)号：US20080250210A1

    公开(公告)日：2008-10-09

    申请号：US11696099

    申请日：2007-04-03

    申请人： Kevin John Ash ,  Lokesh Mohan Gupta ,  Steven Robert Lowe ,  Alfred Emilio Sanchez ,  Kenneth Wayne Todd

    发明人： Kevin John Ash ,  Lokesh Mohan Gupta ,  Steven Robert Lowe ,  Alfred Emilio Sanchez ,  Kenneth Wayne Todd

    IPC分类号： G06F12/00

    CPC分类号： G06F12/0873 ,  G06F11/2033 ,  G06F11/2046 ,  G06F11/2097 ,  G06F2212/284

    摘要： Provided are a method, system, and article of manufacture for copying data from a first cluster to a second cluster to reassign storage areas from the first cluster to the second cluster. An operation is initiated to reassign storage areas from a first cluster to a second cluster, wherein the first cluster includes a first cache and a first storage unit and the second cluster includes a second cache and a second storage unit. Data in the first cache for the storage areas to reassign to the second cluster is copied to the second cache. Data in the first storage unit for storage areas remaining assigned to the first cluster is copied to the second storage unit.

    摘要翻译： 提供了用于将数据从第一集群复制到第二集群的方法，系统和制品，以将从第一集群到第二集群的存储区域重新分配。 启动操作以将存储区域从第一集群重新分配到第二集群，其中第一集群包括第一高速缓存和第一存储单元，并且第二集群包括第二高速缓存和第二存储单元。 将第一个缓存中的数据重新分配给第二个集群的存储区域复制到第二个缓存。 第一存储单元中的剩余分配给第一集群的存储区域的数据被复制到第二存储单元。

    Copying data from a first cluster to a second cluster to reassign storage areas from the first cluster to the second cluster
    6.
    发明授权
    Copying data from a first cluster to a second cluster to reassign storage areas from the first cluster to the second cluster 有权
    将数据从第一个集群复制到第二个集群，以将存储区域从第一个集群重新分配到第二个集群

    公开(公告)号：US07761680B2

    公开(公告)日：2010-07-20

    申请号：US11696099

    申请日：2007-04-03

    申请人： Kevin John Ash ,  Lokesh Mohan Gupta ,  Steven Robert Lowe ,  Alfred Emilio Sanchez ,  Kenneth Wayne Todd

    发明人： Kevin John Ash ,  Lokesh Mohan Gupta ,  Steven Robert Lowe ,  Alfred Emilio Sanchez ,  Kenneth Wayne Todd

    IPC分类号： G06F12/00

    CPC分类号： G06F12/0873 ,  G06F11/2033 ,  G06F11/2046 ,  G06F11/2097 ,  G06F2212/284

    摘要： Provided are a method, system, and article of manufacture for copying data from a first cluster to a second cluster to reassign storage areas from the first cluster to the second cluster. An operation is initiated to reassign storage areas from a first cluster to a second cluster, wherein the first cluster includes a first cache and a first storage unit and the second cluster includes a second cache and a second storage unit. Data in the first cache for the storage areas to reassign to the second cluster is copied to the second cache. Data in the first storage unit for storage areas remaining assigned to the first cluster is copied to the second storage unit.

    摘要翻译： 提供了用于将数据从第一集群复制到第二集群的方法，系统和制品，以将从第一集群到第二集群的存储区域重新分配。 启动操作以将存储区域从第一集群重新分配到第二集群，其中第一集群包括第一高速缓存和第一存储单元，并且第二集群包括第二高速缓存和第二存储单元。 将第一个缓存中的数据重新分配给第二个集群的存储区域复制到第二个缓存。 第一存储单元中的剩余分配给第一集群的存储区域的数据被复制到第二存储单元。

    Preservation of cache data following failover
    7.
    发明授权
    Preservation of cache data following failover 有权
    故障转移后保存缓存数据

    公开(公告)号：US07680982B2

    公开(公告)日：2010-03-16

    申请号：US11676634

    申请日：2007-02-20

    申请人： Kevin John Ash ,  Lokesh Mohan Gupta ,  Steven Robert Lowe ,  Alfred Emilio Sanchez ,  Kenneth Wayne Todd

    发明人： Kevin John Ash ,  Lokesh Mohan Gupta ,  Steven Robert Lowe ,  Alfred Emilio Sanchez ,  Kenneth Wayne Todd

    IPC分类号： G06F12/00

    CPC分类号： G06F12/0804 ,  G06F11/1666 ,  G06F11/2092 ,  G06F12/0866

    摘要： In a data storage subsystem with disk storage and a pair of clusters, one set of DASD fast write data is in cache of one cluster and in non-volatile data storage of the other. In response to a failover of one of the pair of clusters to a local cluster, the local cluster converts the DASD fast write data in local cache to converted fast write data to prioritize the converted data for destaging to disk storage. In response to failure to destage, the local cluster allocates local non-volatile storage tracks and emulates a host adapter to store the converted fast write data by the local non-volatile storage, reconverting the converted fast write data of the non-volatile storage to local DASD fast write data stored in the local non-volatile storage and stored in the local cache storage.

    摘要翻译： 在具有磁盘存储和一对集群的数据存储子系统中，一组DASD快速写入数据位于一个集群的缓存中，而在另一个集群的非易失性数据存储中。 为了响应一对集群中的一个到本地集群的故障切换，本地集群将本地缓存中的DASD快速写入数据转换为转换的快速写入数据，以便将转换后的数据优先转发到磁盘存储。 为了应对未能到达的目的地，本地集群分配本地非易失性存储轨迹，并模拟主机适配器以存储由本地非易失性存储器转换的快速写入数据，将非易失性存储器的转换的快速写入数据重新转换为 本地DASD快速写入数据存储在本地非易失性存储器中并存储在本地缓存中。