Consistency across snapshot shipping and continuous replication
    32.
    发明授权
    Consistency across snapshot shipping and continuous replication 有权
    跨快照运输和连续复制的一致性

    公开(公告)号:US09087112B1

    公开(公告)日:2015-07-21

    申请号:US13924982

    申请日:2013-06-24

    IPC分类号: G06F17/00 G06F17/30

    摘要: In one aspect, a method includes performing replication of a first volume using a snapshot shipping mode, performing replication of a second volume using a continuous replication mode and generating a consistent point in time for the first and second volumes to enable retrieval of replicated data from the first and second volumes at the consistent point in time.

    摘要翻译: 一方面,一种方法包括使用快照发送模式执行第一卷的复制,使用连续复制模式执行第二卷的复制,并且生成第一和第二卷的一致的时间点以使得能够从 第一和第二卷在一致的时间点。

    Method and apparatus for round trip synchronous replication using SCSI reads
    33.
    发明授权
    Method and apparatus for round trip synchronous replication using SCSI reads 有权
    使用SCSI读取的往返同步复制的方法和装置

    公开(公告)号:US08738813B1

    公开(公告)日:2014-05-27

    申请号:US13337605

    申请日:2011-12-27

    IPC分类号: G06F3/00

    摘要: The SCSI WRITE command is a two round trip protocol, which introduces significant latency in synchronous replication environments. Example embodiments of the present invention overcome these and other deficiencies by using SCSI READ commands from the replication site to the production site instead of using SCSI WRITE commands from the production site to the replication site to decrease latency in a synchronous replication environment. SCSI READ commands are single round trip commands. Thus, the number of round trips required to complete each I/O is reduced from two round trips to one round trip by maintaining at least one SCSI READ command from a SCSI initiator to a SCSI target and then responding to at least one of the at least one SCSI READ command at the SCSI target according to the SCSI READ command.

    摘要翻译: SCSI WRITE命令是两个往返协议,在同步复制环境中引入了很大的延迟。 本发明的示例实施例通过使用从复制站点到生产站点的SCSI READ命令来克服这些和其他缺陷,而不是使用从生产站点到复制站点的SCSI WRITE命令来减少同步复制环境中的延迟。 SCSI READ命令是单程往返命令。 因此,通过将至少一个SCSI READ命令从SCSI启动器维护到SCSI目标,然后响应于at中的至少一个,完成每个I / O所需的往返次数从两次往返次数减少到一次往返 根据SCSI READ命令在SCSI目标上至少有一个SCSI READ命令。

    Continuous data replication
    34.
    发明授权
    Continuous data replication 有权
    连续数据复制

    公开(公告)号:US08600945B1

    公开(公告)日:2013-12-03

    申请号:US13434447

    申请日:2012-03-29

    IPC分类号: G06F17/00

    CPC分类号: G06F17/00 G06F11/00 G06F11/20

    摘要: In a first embodiment, computer implemented method and computer program product for executing an action selected from the group consisting of removing a LUN from a consistency group on a production site and adding a LUN to a consistency group on a production site; wherein the action is performed without loss of a journal tracking the changes to the consistency group at a replication site, the replication site replicating the consistency group on the production site.

    摘要翻译: 在第一实施例中,计算机实现的方法和计算机程序产品用于执行从包括从生产站点上的一致性组中移除LUN并将LUN添加到生产站点上的一致性组的组中的动作; 其中所述动作被执行而不丢失在复制站点跟踪对所述一致性组的改变的日志,所述复制站点复制所述生产站点上的所述一致性组。

    Mirroring metadata in a continuous data protection environment
    35.
    发明授权
    Mirroring metadata in a continuous data protection environment 有权
    在连续数据保护环境中镜像元数据

    公开(公告)号:US08438135B1

    公开(公告)日:2013-05-07

    申请号:US13541198

    申请日:2012-07-03

    IPC分类号: G06F7/00 G06F17/30

    摘要: In one aspect, a method includes providing data protection to data in a first volume at a first data protection appliance by storing a copy of the data in a second volume using a second data protection appliance, tracking changes between data locations in the first volume and the second volume using a delta marking stream (DMS) and receiving, at the first data protection appliance, metadata. The metadata is intended to be committed to the DMS. The method further includes mirroring the metadata at a third data protection appliance.

    摘要翻译: 一方面,一种方法包括通过使用第二数据保护装置将数据的副本存储在第二卷中来跟踪第一数据保护装置中的第一卷中的数据,跟踪第一卷中的数据位置之间的变化以及 所述第二卷使用增量标记流(DMS)并且在所述第一数据保护装置处接收元数据。 元数据旨在提交给DMS。 该方法还包括在第三数据保护装置处镜像元数据。

    Journal based replication with a virtual service layer
    36.
    发明授权
    Journal based replication with a virtual service layer 有权
    基于日志的复制与虚拟服务层

    公开(公告)号:US08429362B1

    公开(公告)日:2013-04-23

    申请号:US13077246

    申请日:2011-03-31

    IPC分类号: G06F12/16

    摘要: A system, program product, and computer implemented method for data replication, comprising enabling a virtual service layer to consume a storage medium of a site and map the storage medium of the site as one or more virtual storage volumes, enabling the virtual service layer to present the one or more virtual storage volumes for consumption by a host, enabling a splitter of the site to intercept I/O written to the one or more virtual storage volumes, splitting intercepted I/O to a journal based replication appliance, and enabling the journal based replication appliance to create a continuous data protection image of the data written to one or more virtual storage volumes.

    摘要翻译: 一种用于数据复制的系统,程序产品和计算机实现的方法,包括使虚拟服务层能够使用站点的存储介质并将站点的存储介质映射为一个或多个虚拟存储卷,从而使虚拟服务层能够 呈现主机消耗的一个或多个虚拟存储卷,使得站点的分离器可以截取写入一个或多个虚拟存储卷的I / O,将截取的I / O分解到基于日志的复制设备,并启用 基于日志的复制设备,以创建写入一个或多个虚拟存储卷的数据的连续数据保护映像。

    Inverse star replication
    37.
    发明授权

    公开(公告)号:US09910739B1

    公开(公告)日:2018-03-06

    申请号:US13077262

    申请日:2011-03-31

    IPC分类号: G06F11/14 G06F11/20

    摘要: A method, system and computer program product for enabling a virtual service layer to consume a storage medium at a first site and map the storage medium as one or more virtual storage volumes, enabling the virtual service layer to present the one or more virtual storage volumes for consumption at the first site, enabling a splitter of the virtual service layer to intercept I/O written to the one or more virtual storage volumes, splitting intercepted I/O to a journal based replication appliance, enabling the virtual storage volumes to be accessible at a second site, wherein the one or more the virtual storage volume are mirrored at the second site by the virtual service layer; and replicating IO from either the first site or the second site to a third site.

    Method and apparatus for replicating the punch command
    39.
    发明授权
    Method and apparatus for replicating the punch command 有权
    复制打孔指令的方法和装置

    公开(公告)号:US08996461B1

    公开(公告)日:2015-03-31

    申请号:US13073215

    申请日:2011-03-28

    IPC分类号: G06F17/30 G06F21/60

    摘要: The punch command may be replicated in a replication environment including a production site and a replication site. The solution includes implementing a punch command to free storage received at a replication site in a replication environment by applying the punch command to storage at the replication site and writing data being freed from the storage at the replication site to an undo stream of a journal at the replication site. If the punch command is not supported, a command to write zeros may be used. Further, an unpunch command is provided for properly undoing a punch command and storing data written to the volume before the punch command freed the storage. Additionally, large punch commands may be split into a plurality to smaller punch commands for efficient journal management. Additionally, volume space may be reclaimed by writing a punch command to the journal instead of zeros.

    摘要翻译: 打印命令可以在包括生产站点和复制站点的复制环境中复制。 该解决方案包括实施打孔命令以通过将复制站点上的打包命令应用于复制站点处的存储并将从复制站点上的存储器释放的数据写入到日志的撤消流来释放在复制环境中的复制站点处接收到的存储 复制站点。 如果不支持punch命令,则可以使用写入零的命令。 此外,提供了一个非打开命令,用于在打孔命令释放存储之前适当地撤销打孔命令并存储写入卷的数据。 此外,大的冲头命令可以被分成多个到较小的冲头命令,用于有效的日志管理。 另外,可以通过将punch命令写入日志而不是零来回收卷空间。

    Replicating key-value pairs in a continuous data protection system
    40.
    发明授权
    Replicating key-value pairs in a continuous data protection system 有权
    在连续数据保护系统中复制键值对

    公开(公告)号:US08949180B1

    公开(公告)日:2015-02-03

    申请号:US13535865

    申请日:2012-06-28

    IPC分类号: G06F17/30

    CPC分类号: G06F17/30587 G06F17/30575

    摘要: In one aspect, a method to replicate a key-value pair includes intercepting a command to update a key-value pair in a key-value pair database, the key-value database comprising metadata of a virtual volume, sending an updated key-value pair to a data protection appliance, receiving an acknowledgement that the data protection appliance received the updated key-value pair and updating the key-value pair in the key-value database after the acknowledgement is received.

    摘要翻译: 一方面,一种复制密钥值对的方法包括拦截用于更新密钥对对数据库中的密钥值对的命令,所述密钥值数据库包括虚拟卷的元数据,发送更新的密钥值 与数据保护设备配对,在接收到确认之后,接收到数据保护设备接收到更新的密钥对对的确认,并更新密钥值数据库中的密钥 - 值对。