公开(公告)号：US09471245B1

公开(公告)日：2016-10-18

申请号：US13665881

申请日：2012-10-31

Applicant: EMC Corporation

Inventor： Philip N. Shilane ,  Hyong Shim

IPC: G06F15/167 ,  G06F3/06 ,  G06F11/14 ,  G06F11/20

CPC classification number: G06F3/065 ,  G06F3/061 ,  G06F3/067 ,  G06F11/00 ,  G06F11/1402 ,  G06F11/2056

Abstract: Techniques for transferring modified data with efficiency are described herein. According to one embodiment, the method starts with analyzing host write data to determine a host write pattern of a host writing to sectors at a primary storage, and then a data block size and a backup interval are determined based on at least one of the host write pattern, wherein a data block includes a number of sectors that is determined based on the host write pattern, and known characteristics of transferring dirty data blocks of the primary storage, wherein a dirty data block includes at least one sector that has been changed from a previous backup. Then dirty data blocks are transferred from the primary storage to a secondary storage as part of a backup.

Abstract translation: 本文描述了用于有效传送修改数据的技术。 根据一个实施例，该方法开始于分析主机写入数据以确定主机写入主存储器中的扇区的主机写入模式，然后基于主机中的至少一个来确定数据块大小和备份间隔 写模式，其中数据块包括基于主机写入模式确定的多个扇区以及传送主存储器的脏数据块的已知特性，其中脏数据块包括至少一个从 以前的备份。 然后，脏数据块将作为备份的一部分从主存储传输到辅助存储。

公开(公告)号：US09189402B1

公开(公告)日：2015-11-17

申请号：US14038699

申请日：2013-09-26

Applicant: EMC Corporation

Inventor： Stephen Smaldone ,  Grant R. Wallace ,  Frederick Douglis ,  Philip N. Shilane ,  Hyong Shim

IPC: G06F12/08 ,  G06F12/12 ,  G11C7/10

CPC classification number: G06F12/0871 ,  G06F12/0808 ,  G06F12/121 ,  G06F12/123 ,  G06F2212/1016 ,  G06F2212/222 ,  G06F2212/313 ,  G06F2212/401 ,  G06F2212/463 ,  G11C7/1072

Abstract: A computer-implemented method for caching content in a cache memory device is disclosed. The method starts with receiving, at a cache manager, one or more data chunks to be cached in a cache memory device, where the one or more data chunks are retrieved from a persistent storage disk of a storage system in response to a read request of a region of a file. Then the one or more data chunks of a file extent is compressed using a predetermined compression algorithm, and the file extent is packed into a write-evict unit (WEU) maintained in a random-access memory (RAM) that has been open to store a plurality of file extents. In response to determining that the WEU is full, the cache manager writes the WEU from the RAM into the cache memory device.

Abstract translation: 公开了一种用于在高速缓冲存储器件中缓存内容的计算机实现的方法。 该方法开始于在高速缓存管理器处接收要缓存在高速缓冲存储器设备中的一个或多个数据块，其中响应于对存储系统的读取请求而从存储系统的永久存储盘检索一个或多个数据块 一个文件的区域。 然后使用预定的压缩算法来压缩文件盘区的一个或多个数据块，并且将文件盘区打包到维持在已经打开以存储的随机存取存储器（RAM）中的写入单元（WEU）中 多个文件盘区。 响应于确定WEU已满，高速缓存管理器将WEU从RAM写入缓存存储器设备。