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1.发明授权Prefetching data tracks and parity data to use for destaging updated tracks 失效预取数据轨道和奇偶校验数据以用于降级更新的轨道公开(公告)号：US08631190B2
公开(公告)日：2014-01-14
申请号：US13189285
申请日：2011-07-22
IPC分类号： G06F13/10
CPC分类号： G06F12/0868 , G06F12/0862 , G06F12/0897
摘要： Provided are a computer program product, system, and method for prefetching data tracks and parity data to use for destaging updated tracks. A write request is received including at least one updated track to the group of tracks. The at least one updated track is stored in a first cache device. A prefetch request is sent to the at least one sequential access storage device to prefetch tracks in the group of tracks to a second cache device. A read request is generated to read the prefetch tracks following the sending of the prefetch request. The read prefetch tracks returned to the read request from the second cache device are stored in the first cache device. New parity data is calculated from the at least one updated track and the read prefetch tracks.
摘要翻译： 提供了一种用于预取数据轨道和奇偶校验数据以用于降级更新的轨道的计算机程序产品，系统和方法。 接收包括至少一个更新的轨道到轨道组的写入请求。 所述至少一个更新的轨道存储在第一高速缓存设备中。 预取请求被发送到至少一个顺序访问存储设备以将轨道组中的轨道预取到第二高速缓存设备。 在发送预取请求之后，生成读取请求以读取预取轨迹。 从第二高速缓存设备返回到读取请求的读取预取轨迹存储在第一高速缓存设备中。 从所述至少一个更新的轨道和读取的预取轨迹计算新的奇偶校验数据。
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公开(公告)号：US20130024624A1
公开(公告)日：2013-01-24
申请号：US13189271
申请日：2011-07-22
IPC分类号： G06F12/12
CPC分类号： G06F12/12 , G06F12/0862
摘要： Provided are a computer program product, sequential access storage device, and method for managing data in a sequential access storage device receiving read requests and write requests from a system with respect to tracks stored in a sequential access storage medium. A prefetch request indicates prefetch tracks in the sequential access storage medium to read from the sequential access storage medium. The accessed prefetch tracks are cached in a non-volatile storage device integrated with the sequential access storage device, wherein the non-volatile storage device is a faster access device than the sequential access storage medium. A read request is received for the prefetch tracks following the caching of the prefetch tracks, wherein the prefetch request is designated to be processed at a lower priority than the read request with respect to the sequential access storage medium. The prefetch tracks are returned from the non-volatile storage device to the read request.
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3.发明申请公开(公告)号：US20130024627A1
公开(公告)日：2013-01-24
申请号：US13458791
申请日：2012-04-27
IPC分类号： G06F12/08
CPC分类号： G06F12/0868 , G06F12/0862 , G06F12/0897
摘要： Provided are a computer program product, system, and method for prefetching data tracks and parity data to use for destaging updated tracks. A write request is received including at least one updated track to the group of tracks. The at least one updated track is stored in a first cache device. A prefetch request is sent to the at least one sequential access storage device to prefetch tracks in the group of tracks to a second cache device. A read request is generated to read the prefetch tracks following the sending of the prefetch request. The read prefetch tracks returned to the read request from the second cache device are stored in the first cache device. New parity data is calculated from the at least one updated track and the read prefetch tracks.
摘要翻译： 提供了一种用于预取数据轨道和奇偶校验数据以用于降级更新的轨道的计算机程序产品，系统和方法。 接收包括至少一个更新的轨道到轨道组的写入请求。 所述至少一个更新的轨道存储在第一高速缓存设备中。 预取请求被发送到至少一个顺序访问存储设备以将轨道组中的轨道预取到第二高速缓存设备。 在发送预取请求之后，生成读取请求以读取预取轨迹。 从第二高速缓存设备返回到读取请求的读取预取轨迹存储在第一高速缓存设备中。 从所述至少一个更新的轨道和读取的预取轨迹计算新的奇偶校验数据。
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公开(公告)号：US20130024613A1
公开(公告)日：2013-01-24
申请号：US13189285
申请日：2011-07-22
IPC分类号： G06F12/08
CPC分类号： G06F12/0868 , G06F12/0862 , G06F12/0897
摘要： Provided are a computer program product, system, and method for prefetching data tracks and parity data to use for destaging updated tracks. A write request is received including at least one updated track to the group of tracks. The at least one updated track is stored in a first cache device. A prefetch request is sent to the at least one sequential access storage device to prefetch tracks in the group of tracks to a second cache device. A read request is generated to read the prefetch tracks following the sending of the prefetch request. The read prefetch tracks returned to the read request from the second cache device are stored in the first cache device. New parity data is calculated from the at least one updated track and the read prefetch tracks.
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公开(公告)号：US08775729B2
公开(公告)日：2014-07-08
申请号：US13458791
申请日：2012-04-27
CPC分类号： G06F12/0868 , G06F12/0862 , G06F12/0897
摘要： Provided are a computer program product, system, and method for prefetching data tracks and parity data to use for destaging updated tracks. A write request is received including at least one updated track to the group of tracks. The at least one updated track is stored in a first cache device. A prefetch request is sent to the at least one sequential access storage device to prefetch tracks in the group of tracks to a second cache device. A read request is generated to read the prefetch tracks following the sending of the prefetch request. The read prefetch tracks returned to the read request from the second cache device are stored in the first cache device. New parity data is calculated from the at least one updated track and the read prefetch tracks.
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公开(公告)号：US08762650B2
公开(公告)日：2014-06-24
申请号：US13480255
申请日：2012-05-24
CPC分类号： G06F12/12 , G06F12/0862
摘要： Provided are a computer program product, sequential access storage device, and method for managing data in a sequential access storage device receiving read requests and write requests from a system with respect to tracks stored in a sequential access storage medium. A prefetch request indicates prefetch tracks in the sequential access storage medium to read from the sequential access storage medium. The accessed prefetch tracks are cached in a non-volatile storage device integrated with the sequential access storage device, wherein the non-volatile storage device is a faster access device than the sequential access storage medium. A read request is received for the prefetch tracks following the caching of the prefetch tracks, wherein the prefetch request is designated to be processed at a lower priority than the read request with respect to the sequential access storage medium. The prefetch tracks are returned from the non-volatile storage device to the read request.
摘要翻译： 提供了一种计算机程序产品，顺序访问存储设备和用于管理顺序访问存储设备中的数据的方法，该顺序访问存储设备接收关于存储在顺序访问存储介质中的轨道的系统的读取请求和写入请求。 预取请求指示顺序访问存储介质中的预取轨迹，以从顺序访问存储介质读取。 所访问的预取轨道被缓存在与顺序存取存储设备集成的非易失性存储设备中，其中非易失性存储设备是比顺序访问存储介质更快的访问设备。 在预取磁道的缓存之后，为预取磁道接收读取请求，其中，预取请求被指定为以相对于顺序访问存储介质的读请求低的优先级来处理。 预取轨迹从非易失性存储设备返回到读取请求。
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公开(公告)号：US08650354B2
公开(公告)日：2014-02-11
申请号：US13189271
申请日：2011-07-22
IPC分类号： G06F13/10
CPC分类号： G06F12/12 , G06F12/0862
摘要： Provided are a computer program product, sequential access storage device, and method for managing data in a sequential access storage device receiving read requests and write requests from a system with respect to tracks stored in a sequential access storage medium. A prefetch request indicates prefetch tracks in the sequential access storage medium to read from the sequential access storage medium. The accessed prefetch tracks are cached in a non-volatile storage device integrated with the sequential access storage device, wherein the non-volatile storage device is a faster access device than the sequential access storage medium. A read request is received for the prefetch tracks following the caching of the prefetch tracks, wherein the prefetch request is designated to be processed at a lower priority than the read request with respect to the sequential access storage medium. The prefetch tracks are returned from the non-volatile storage device to the read request.
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公开(公告)号：US20130024625A1
公开(公告)日：2013-01-24
申请号：US13480255
申请日：2012-05-24
IPC分类号： G06F12/08
CPC分类号： G06F12/12 , G06F12/0862
摘要： Provided are a computer program product, sequential access storage device, and method for managing data in a sequential access storage device receiving read requests and write requests from a system with respect to tracks stored in a sequential access storage medium. A prefetch request indicates prefetch tracks in the sequential access storage medium to read from the sequential access storage medium. The accessed prefetch tracks are cached in a non-volatile storage device integrated with the sequential access storage device, wherein the non-volatile storage device is a faster access device than the sequential access storage medium. A read request is received for the prefetch tracks following the caching of the prefetch tracks, wherein the prefetch request is designated to be processed at a lower priority than the read request with respect to the sequential access storage medium. The prefetch tracks are returned from the non-volatile storage device to the read request.
摘要翻译： 提供了一种计算机程序产品，顺序访问存储设备和用于管理顺序访问存储设备中的数据的方法，该顺序访问存储设备接收关于存储在顺序访问存储介质中的轨道的系统的读取请求和写入请求。 预取请求指示顺序访问存储介质中的预取轨迹，以从顺序访问存储介质读取。 所访问的预取轨道被缓存在与顺序存取存储设备集成的非易失性存储设备中，其中非易失性存储设备是比顺序访问存储介质更快的访问设备。 在预取磁道的缓存之后，为预取磁道接收读取请求，其中，预取请求被指定为以相对于顺序访问存储介质的读请求低的优先级来处理。 预取轨迹从非易失性存储设备返回到读取请求。
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公开(公告)号：US08788742B2
公开(公告)日：2014-07-22
申请号：US13113949
申请日：2011-05-23
IPC分类号： G06F12/00
CPC分类号： G06F12/0866 , G06F12/123
摘要： Provided are a computer program product, system, and method for using an attribute of a write request to determine where to cache data in a storage system having multiple caches including non-volatile storage cache in a sequential access storage device. Received modified tracks are cached in the non-volatile storage device integrated with the sequential access storage device in response to determining to cache the modified tracks. A write request having modified tracks is received. A determination is made as to whether an attribute of the received write request satisfies a condition. The received modified tracks for the write request are cached in the non-volatile storage device in response to determining that the determined attribute does not satisfy the condition. A destage request is added to a request queue for the received write request having the determined attribute not satisfying the condition.
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公开(公告)号：US08667180B2
公开(公告)日：2014-03-04
申请号：US13531925
申请日：2012-06-25
IPC分类号： G06F15/16
CPC分类号： G06F3/064 , G06F3/0608 , G06F3/0613 , G06F3/067 , G06F12/0804 , G06F12/0868 , G06F2212/401
摘要： For facilitating data compression, a set of logical extents, each having compressed logical tracks of data, is mapped to a head physical extent and, if the head physical extent is determined to have been filled, to at least one overflow extent having spatial proximity to the head physical extent. Pursuant to at least one subsequent write operation and destage operation, the at least one subsequent write operation and destage operation determined to be associated with the head physical extent, the write operation is mapped to one of the head physical extent, the at least one overflow extent, and an additional extent having spatial proximity to the at least one overflow extent.
摘要翻译： 为了便于数据压缩，将具有压缩的数据的逻辑轨迹的一组逻辑盘区映射到头部物理范围，并且如果将头部物理范围确定为已经被填充到至少一个具有空间接近的溢出范围 头部物理范围。 根据至少一个随后的写入操作和终止操作，所述至少一个随后的写入操作和后退操作被确定为与所述头部物理范围相关联，所述写入操作被映射到所述头部物理范围中的一个，所述至少一个溢出 并且具有与至少一个溢出范围的空间接近的附加程度。
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