Two-phase snap copy
    6.
    发明授权
    Two-phase snap copy 有权
    两相快照

    公开(公告)号:US07493458B1

    公开(公告)日:2009-02-17

    申请号:US10941671

    申请日:2004-09-15

    IPC分类号: G06F12/00

    摘要: A point in time copy of a data set is provided using a two-phase snapshot copy operation. When a write request is received, as part of the first phase, a chunk including the target location of the write request is determined. Using a “copy on first write” technique, the data at the target location is copied to a snap data area in an allocated data area that is the size of the chunk. A first map for the data set is updated to include up to three entries representing a mapping of the segment including the target location. A second map for the snap data area is updated to include a single entry for the copy of the data from the target location. As part of the second phase, the multiple entries in the first map are coalesced into a single entry after the remaining portions of the chunk are copied to the data area in the snap data area.

    摘要翻译: 使用两相快照复制操作提供数据集的时间点副本。 当接收到写请求时,作为第一阶段的一部分,确定包括写请求的目标位置的块。 使用“第一次写入复制”技术,将目标位置的数据复制到作为块大小的分配数据区域中的快照数据区域。 数据集的第一个映射被更新为包括最多三个表示包括目标位置的段的映射的条目。 快照数据区域的第二张地图被更新为包含来自目标位置的数据副本的单个条目。 作为第二阶段的一部分,在块的剩余部分被复制到快照数据区域中的数据区域之后,第一个地图中的多个条目合并成一个条目。

    System and method for virtualization of networked storage resources
    9.
    发明授权
    System and method for virtualization of networked storage resources 有权
    网络存储资源虚拟化的系统和方法

    公开(公告)号:US08627005B1

    公开(公告)日:2014-01-07

    申请号:US12946424

    申请日:2010-11-15

    IPC分类号: G06F12/08

    摘要: A method, system, and program product for managing a plurality of storage area networks including a plurality of data storage volumes and one or more hosts, wherein the volumes are in a storage network, wherein the network includes one or more processors in the network, the program product comprising a computer-readable storage medium encoded with computer-executable program code enabling controlling virtualization of volumes in the storage network and managing a SCSI virtualization service; wherein the volume virtualization controller service supports virtualization enabling virtual Storage Area Networks (SAN)s by parsing between front-end SANs and back-end SANs regardless of physical configuration of the front and back-end SANs, to enable mapping from virtual volumes to back-end storage elements across virtual SANs.

    摘要翻译: 一种用于管理包括多个数据存储卷和一个或多个主机的多个存储区域网络的方法,系统和程序产品,其中所述卷位于存储网络中,其中所述网络包括所述网络中的一个或多个处理器, 该程序产品包括编码有计算机可执行程序代码的计算机可读存储介质,其能够控制存储网络中的卷的虚拟化并管理SCSI虚拟化服务; 其中,卷虚拟化控制器服务通过在前端SAN和后端SAN之间进行解析来支持虚拟存储区域网络(SAN)的虚拟化,而不管前端和后端SAN的物理配置如何,以实现从虚拟卷到后端的映射 - 跨虚拟SAN的存储元素。