Apparatus and method to adjust data transfer rate
    22.
    发明申请
    Apparatus and method to adjust data transfer rate 失效
    调整数据传输速率的装置和方法

    公开(公告)号:US20050050287A1

    公开(公告)日:2005-03-03

    申请号:US10652021

    申请日:2003-08-29

    摘要: A method to adjust the data transfer rate for one of (N) primary backup appliances. The method forms by a first primary backup appliance at least one consistent transactions set. The first primary backup appliance receives the (n)th status signal, and the (n+1)th status signal from each of the other (N−1) primary backup appliances. The method calculates the (n)th effective bandwidth for each of the (N) primary backup appliances, the (n)th time to complete for each of the (N) primary backup appliances, and the (n)th effective aggregate bandwidth for all (N) primary appliances. If the (n)th time to complete for the first primary backup appliance is greater than the (n)th time to complete for each of the other (N−1) primary backup appliances, then the method provides at least one consistent transactions set from the first primary backup appliance to a first secondary backup appliance with no delay.

    摘要翻译: 一种用于调整(N)个主备份设备之一的数据传输速率的方法。 该方法由第一个主备份设备形成至少一个一致的事务集。 第一个主要备份设备从其他(N-1)个主备份设备接收第(n)个状态信号和第(n + 1)个状态信号。 该方法计算(N)个主备份设备中的每个(N)个主备份设备的第(n)个有效带宽,(N)个主备份设备中的每一个完成的第(n)个时间,以及(N) 所有(N)主要电器。 如果第一个主备份设备完成的第(n)个时间大于其他(N-1)个主备份设备的第(n)个时间完成,则该方法提供至少一个一致的事务集 从第一个主备份设备到第一个辅助备份设备,不会延迟。

    Autonomic link optimization through elimination of unnecessary transfers
    23.
    发明申请
    Autonomic link optimization through elimination of unnecessary transfers 失效
    通过消除不必要的转移来进行自动链接优化

    公开(公告)号:US20050010732A1

    公开(公告)日:2005-01-13

    申请号:US10618242

    申请日:2003-07-11

    IPC分类号: G06F11/20 G06F12/16 H04L29/08

    摘要: Disclosed are a system, a method, and a computer program product to efficiently create consistent transaction sets to maintain one or more copies of data at different data storage sites. All transactions sent to a primary backup appliance during a consistent transaction set creation interval are formed into a consistent transaction set by efficiently adding new transactions as they are received and removing unnecessary transfers as newer versions arrive. When the creation interval has expired, the complete consistent transaction set is transferred to a secondary backup appliance to be used to update a consistent backup copy of the primary site data. For each consistent transaction set, there will be a tree data structure (a search tree) created that contains the addressing information for all of the blocks of data in the consistent transaction set. The tree data structure used is a modified splay tree, which is a specialization of a binary search tree such that accessed nodes are “percolated” to the top of the tree for faster subsequent access. Secondary data consistency is maintained because the consistent transaction sets are applied whole at the secondary site, and after application, the secondary volumes are exact copies of the primary volumes at the time the consistent transaction set was completed.

    摘要翻译: 公开了一种系统,方法和计算机程序产品,用于有效地创建一致的事务集以在不同的数据存储站点维护一个或多个数据副本。 在一致的事务集创建间隔期间发送到主备份设备的所有事务通过在接收到高效添加新事务时被形成为一致的事务集,并在新的版本到达时删除不必要的传输。 创建间隔已过期时,完整的一致事务集将传输到辅助备份设备,以用于更新主站点数据的一致备份副本。 对于每个一致的事务集,将创建一个包含一致事务集中所有数据块的寻址信息的树数据结构(搜索树)。 所使用的树数据结构是一个修改后的播放树,它是一个二叉搜索树的专门化,使得被访问的节点被“穿越”到树的顶部,以便更快的后续访问。 维持辅助数据一致性,因为一致的事务集整体应用于辅助站点,并且在应用程序之后,辅助卷是一致事务集完成时主卷的精确副本。

    Apparatus and method for file-level replication between two or more non-symmetric storage sites
    24.
    发明申请
    Apparatus and method for file-level replication between two or more non-symmetric storage sites 有权
    两个或多个非对称存储站点之间的文件级复制的装置和方法

    公开(公告)号:US20070124340A1

    公开(公告)日:2007-05-31

    申请号:US11291629

    申请日:2005-11-30

    IPC分类号: G06F17/30

    摘要: An apparatus and method to replicate one or more files between non-symmetric storage systems are disclosed. The method supplies a first storage system comprising a first configuration, a first volume, a first file system, and a first replication appliance comprising first replication appliance memory. The method further supplies a second storage system comprising a second configuration, a second volume, a second file system, and a second replication appliance comprising second replication appliance memory, where the first configuration differs from the second configuration. The first storage system receives a dataset, writes that dataset to the first volume as a first file. Applicants' method then replicates the first file to the second volume as a second file, and maintains in the second replication appliance memory a second replication appliance mapping associating the first file with the second file.

    摘要翻译: 公开了一种在非对称存储系统之间复制一个或多个文件的装置和方法。 该方法提供包括第一配置,第一卷,第一文件系统和包括第一复制设备存储器的第一复制设备的第一存储系统。 该方法还提供包括第二配置,第二卷,第二文件系统和包括第二复制设备存储器的第二复制设备的第二存储系统,其中第一配置与第二配置不同。 第一个存储系统接收数据集,将该数据集写入第一个卷作为第一个文件。 然后,申请人的方法将第一文件作为第二文件复制到第二卷,并在第二复制装置存储器中维护将第一文件与第二文件相关联的第二复制装置映射。

    Apparatus, system, and method for reliably updating a data group in a data replication environment
    25.
    发明申请
    Apparatus, system, and method for reliably updating a data group in a data replication environment 失效
    用于可靠地更新数据复制环境中的数据组的装置,系统和方法

    公开(公告)号:US20050278388A1

    公开(公告)日:2005-12-15

    申请号:US11093392

    申请日:2005-03-30

    IPC分类号: G06F7/00

    摘要: An apparatus, system, and method are disclosed for reliably updating a data group in a data replication environment. The apparatus, system, and method reliably update the data group by receiving an updated data group sent from a first storage medium to a second storage medium, comparing the updated data group with a previous data group previously existing on the second storage medium and writing the updated data group to the second storage medium. The read-before-write and differencing method disclosed maintain reliability by storing multiple copies of changes made to the second storage medium during and after the write process.

    摘要翻译: 公开了用于可靠地更新数据复制环境中的数据组的装置,系统和方法。 装置,系统和方法通过接收从第一存储介质发送到第二存储介质的更新数据组来可靠地更新数据组,将更新的数据组与先前存在于第二存储介质上的先前数据组进行比较, 更新数据组到第二存储介质。 所公开的预写入和差分方法通过在写入过程中和之后存储对第二存储介质所做的更改的多个副本来保持可靠性。

    Differencing in a data replication appliance
    26.
    发明申请
    Differencing in a data replication appliance 失效
    数据复制设备中的差异

    公开(公告)号:US20060206542A1

    公开(公告)日:2006-09-14

    申请号:US11080871

    申请日:2005-03-14

    IPC分类号: G06F17/30

    CPC分类号: G06F11/2066 G06F11/2071

    摘要: Methods and apparatus are provided for copying data from a primary storage facility to a secondary storage facility which reduce the workload on the storage controller in the primary facility and minimize bandwidth usage. The primary storage facility includes a primary data replication appliance which transfers data to a secondary replication appliance. Updated data from a host is both stored through a storage controller in the primary facility and also received by the primary replication appliance. Logic in the primary replication appliance determines whether the immediately previous version of the data is in a buffer from a previous storage operation. If so, the current (updated) version of the data is compared with the previous version and the difference, such as calculated through a bit-wise exclusive-OR operation, is transferred to the secondary replication appliance. The process is reversed in the secondary replication appliance and the recreated updated version of the data stored in the secondary facility.

    摘要翻译: 提供了用于将数据从主存储设施复制到辅助存储设备的方法和装置,其减少了主设备中的存储控制器上的工作量并且最小化带宽使用。 主存储设备包括将数据传输到辅助复制设备的主数据复制设备。 来自主机的更新数据都通过主设备中的存储控制器存储,并由主复制设备接收。 主复制设备中的逻辑可确定数据的紧接先前版本是否在先前存储操作的缓冲区中。 如果是,将当前(更新)版本的数据与以前的版本进行比较,并且通过逐位异或运算计算的差异被传送到辅助复制设备。 次要复制设备中的过程与第二个设备中存储的数据的重新创建的更新版本相反。