公开(公告)号：US06691139B2

公开(公告)日：2004-02-10

申请号：US09774839

申请日：2001-01-31

Applicant: Shivaji Ganesh ,  Ramesh Kavanappillil

Inventor： Shivaji Ganesh ,  Ramesh Kavanappillil

IPC: G06F1100

CPC classification number: G06F11/2071 ,  G06F11/1451 ,  G06F11/1464 ,  G06F11/1471 ,  G06F11/1474 ,  G06F11/2064 ,  G06F11/2066 ,  G06F11/2079 ,  G06F11/2097 ,  G06F2201/80 ,  Y10S707/99955

Abstract: A method for creating a standby data processing system located at a standby site, which is remotely located from a primary site. The method comprises a first step of computing a difference between an active data file and an archive data file to produce a delta image at the primary site. Another step is transmitting the active data file and the delta image, separately in time sequence, from the primary site to a standby site. A final step is combining the delta image with the active data file at the standby site, to produce an archive data file. An advantage of this method is the creation of a standby data processing system, while using a lower bandwidth to create this additional site.

Abstract translation: 一种用于创建位于远离主站点的备用站点的备用数据处理系统的方法。 该方法包括计算活动数据文件和存档数据文件之间的差异以在主站点处产生增量图像的第一步骤。 另一步是将主动数据文件和增量图像按时间顺序从主站点发送到备用站点。 最后一步是将增量映像与备用站点上的活动数据文件进行组合，以生成归档数据文件。 该方法的优点是创建备用数据处理系统，同时使用较低带宽创建此附加站点。

公开(公告)号：US06654752B2

公开(公告)日：2003-11-25

申请号：US10228783

申请日：2002-08-26

Applicant: Yuval Ofek

Inventor： Yuval Ofek

IPC: G06F1730

CPC classification number: G06F11/2082 ,  G06F11/1451 ,  G06F11/2064 ,  G06F11/2066 ,  Y10S707/99953

Abstract: A data network with data storage facilities for providing redundant data storage and for enabling concurrent access to the data for multiple purposes. A first data processing system with a first data facility stores a data base and processes transactions or other priority applications. A second data storage facility, that may be physically separated from the first data storage facility, mirrors the data in the first data storage facility. In a concurrent access operating mode, the second data storage facility makes the data available to an application concurrently with, but independently of, the operation of the other application. On completion of the concurrent operation, the second data storage facility can reconnect with and synchronizes with the first data storage facility thereby to reestablish the mirroring operation.

公开(公告)号：US20030182312A1

公开(公告)日：2003-09-25

申请号：US10100434

申请日：2002-03-19

Inventor： Raymond C. Chen ,  Stephen L. Manley

IPC: G06F017/30

CPC classification number: G06F11/2066 ,  G06F11/1435 ,  G06F11/1451 ,  G06F11/2074 ,  G06F17/30088 ,  Y10S707/99954

Abstract: In a system and method for updating a remote replicated destination file system snapshot with changes in a source file system snapshot, users and processes are redirected to a local exported snapshot of the replicated snapshot on the active file system on the destination before beginning the next update of the active file system's replicated snapshot. In this manner, an unstable replicated snapshot is not accessed. Indirection is introduced into inode lookup at the destination as the destination's active file system is being updated. The indirection can be based upon a snapshot ID that conforms to a latest exported snapshot ID.

Abstract translation: 在使用源文件系统快照中的更改更新远程复制目标文件系统快照的系统和方法中，用户和进程将重定向到目标上的活动文件系统上的复制快照的本地导出快照，然后再开始下一次更新 的活动文件系统的复制快照。 以这种方式，不会访问不稳定的复制快照。 当目标的活动文件系统正在更新时，将间接引入到目标的inode查找。 间接可以基于符合最新导出的快照ID的快照ID。

公开(公告)号：US06625705B2

公开(公告)日：2003-09-23

申请号：US10224211

申请日：2002-08-20

Applicant: Moshe Yanai ,  Natan Vishlitzky ,  Bruno Alterescu ,  Daniel D. C. Castel ,  Gadi G. Shklarsky

Inventor： Moshe Yanai ,  Natan Vishlitzky ,  Bruno Alterescu ,  Daniel D. C. Castel ,  Gadi G. Shklarsky

IPC: G06F1216

CPC classification number: G06F11/2071 ,  G06F3/0601 ,  G06F3/0608 ,  G06F3/061 ,  G06F3/0619 ,  G06F3/064 ,  G06F3/065 ,  G06F3/0661 ,  G06F3/0689 ,  G06F11/2066 ,  G06F11/2074 ,  G06F11/2079 ,  G06F11/2082 ,  G06F2003/0697 ,  G11B20/1217 ,  H04L29/06 ,  H04L67/1095 ,  H04L69/26 ,  H04L69/40 ,  Y10S707/99942

Abstract: A primary data storage system is linked to a geographically remote secondary data storage system for automatically maintaining a remote copy of the data in the primary storage. Each of the data storage systems has at least one data storage device, a cache memory, a data storage system controller, and a service processor for servicing the data storage system. The primary and secondary service processors are linked to permit remote system configuration and remote software programming of the secondary data storage system, and to exchange a report of all the non-valid, out of sync tracks. The service processors can also perform the task of scanning for remote write pending bits to invoke the remote copy task, and checking for invalid track bits to invoke a task for copying data from a known good storage device to the device with the invalid track bit set.

公开(公告)号：US20030014523A1

公开(公告)日：2003-01-16

申请号：US09905436

申请日：2001-07-13

Inventor： John Teloh ,  Simon Crosland ,  Philip Newton

IPC: G06F015/173 ,  G06F012/00 ,  G06F017/30

CPC classification number: G06F11/2074 ,  G06F11/2058 ,  G06F11/2066 ,  G06F11/2079 ,  G06F11/2082 ,  G06F2201/855 ,  Y10S707/99953 ,  Y10S707/99955

Abstract: A method and apparatus for performing remote data replication. The method and apparatus can detect an interruption in the remote data replication process and begin local logging of all local data writes that occur while the remote data replication process is unavailable. The method and apparatus can perform remote data replication across multiple remote storage devices or the method and apparatus can replicate a data structure from a first storage device to multiple locations on one or more remote storage devices. In addition, the method and apparatus can halt the remote data replication and copy data from the local storage device to the remote storage device to ensure data uniformity on all storage devices.

公开(公告)号：US06502205B1

公开(公告)日：2002-12-31

申请号：US09709814

申请日：2000-11-10

Applicant: Moshe Yanai ,  Natan Vishlitzky ,  Bruno Alterescu ,  Daniel Castel ,  Gadi Shklarsky ,  Yuval Ofek

Inventor： Moshe Yanai ,  Natan Vishlitzky ,  Bruno Alterescu ,  Daniel Castel ,  Gadi Shklarsky ,  Yuval Ofek

IPC: H02H305

CPC classification number: G06F11/2071 ,  G06F3/0601 ,  G06F3/0608 ,  G06F3/061 ,  G06F3/0619 ,  G06F3/064 ,  G06F3/065 ,  G06F3/0661 ,  G06F3/0689 ,  G06F11/2066 ,  G06F11/2074 ,  G06F11/2079 ,  G06F11/2082 ,  G06F2003/0697 ,  G11B20/1217 ,  H04L29/06 ,  H04L67/1095 ,  H04L69/26 ,  H04L69/40 ,  Y10S707/99942

Abstract: Two data storage systems are interconnected by a data link for remote mirroring of data. Each volume of data is configured as local, primary in a remotely mirrored volume pair, or secondary in a remotely mirrored volume pair. Normally, a host computer directly accesses either a local or a primary volume, and data written to a primary volume is automatically sent over the link to a corresponding secondary volume. Each remotely mirrored volume pair can operate in a selected synchronization mode including synchronous, semi-synchronous, adaptive copy-remote write pending, and adaptive copy-disk. Direct write access to a secondary volume is denied if a “sync required” attribute is set for the volume and the volume is not synchronized. If a “volume domino” mode is enabled for a remotely mirrored volume pair, access to a volume of the pair is denied when the other volume is inaccessible. In a “links domino” mode, access to all remotely mirrored volumes is denied when remote mirroring-is disrupted by an all-links failure. The domino modes can be used to initiate application-based recovery, for example, recovering a secondary data file using a secondary log file. In an active migration mode, host processing of a primary volume is concurrent with migration to a secondary volume. In an overwrite cache mode, remote write-pending data in cache can be overwritten. Write data for an entire host channel command word chain is bundled in one link transmission.

Abstract translation: 两个数据存储系统通过用于数据远程镜像的数据链路相互连接。 每卷数据被配置为本地，主要在远程镜像卷对中，或辅助在远程镜像卷对中。 通常，主机直接访问本地或主卷，并且写入主卷的数据将通过链接自动发送到相应的辅助卷。 每个远程镜像卷对可以在所选择的同步模式中操作，包括同步，半同步，自适应复制远程写入挂起和自适应复制盘。 如果为卷设置了“需要同步”属性，并且卷未同步，则对副卷的直接写入访问被拒绝。 如果对远程镜像卷对启用“体积多米诺骨牌”模式，则在其他卷无法访问时，对该卷的访问将被拒绝。 在“连接多米诺骨牌”模式下，当远程镜像被全连接故障中断时，对所有远程镜像卷的访问被拒绝。 多米诺骨牌模式可用于启动基于应用程序的恢复，例如，使用辅助日志文件恢复辅助数据文件。 在主动迁移模式下，主卷的主机处理与迁移到辅助卷并发。 在覆盖缓存模式下，高速缓存中的远程写挂起数据可以被覆盖。 整个主机通道命令字链的写入数据捆绑在一个链路传输中。

公开(公告)号：US06487645B1

公开(公告)日：2002-11-26

申请号：US09519080

申请日：2000-03-06

Applicant: Brian Dow Clark ,  William Frank Micka ,  Warren Keith Stanley

Inventor： Brian Dow Clark ,  William Frank Micka ,  Warren Keith Stanley

IPC: G06F1200

CPC classification number: G06F3/0656 ,  G06F3/0619 ,  G06F3/0659 ,  G06F3/067 ,  G06F11/2066 ,  G06F11/2074 ,  Y10S707/99953 ,  Y10S707/99955

Abstract: When a primary data storage subsystem receives updates for local storage and mirroring at a counterpart secondary storage subsystem, the primary subsystem institutes device-specific, fairness-driven update blocking to avoid overrunning the primary subsystem's update buffer with updates destined for any one device. Broadly, the primary subsystem first receives update requests, then logs the updates in an update buffer, then stores the logged updates in primary storage, and finally copies the updates to the secondary storage subsystem. Each update request includes update data and also identifies a targeted logical device, physical device, or other subpart of primary storage. The primary subsystem maintains a counter or other update activity indicator that represents update activity for each storage subpart, such as the number of updates stored in the buffer. For each update request, the primary subsystem determines whether target subpart's update activity exceeds a prescribed level. If not, the update data is stored in primary storage. Otherwise, if the update activity is excessive, the primary subsystem rejects the update. Optionally, the primary subsystem may selectively override certain rejections to prevent completely blocking updates for that subpart.

Abstract translation: 当主数据存储子系统接收本地存储的更新并在对应的辅助存储子系统中进行镜像时，主要子系统将进行特定于设备的公平驱动的更新阻止，以避免超过主子系统的更新缓冲区，并更新目的地为任何一个设备。 一般来说，主子系统首先接收更新请求，然后将更新记录在更新缓冲区中，然后将记录的更新存储在主存储中，最后将更新复制到辅助存储子系统。 每个更新请求包括更新数据，并且还标识目标逻辑设备，物理设备或主存储器的其他子部分。 主子系统维护计数器或其他更新活动指示符，表示每个存储子部分的更新活动，例如存储在缓冲区中的更新次数。 对于每个更新请求，主子系统确定目标子部分的更新活动是否超过规定级别。 如果没有，则更新数据存储在主存储器中。 否则，如果更新活动过多，则主子系统将拒绝更新。 可选地，主子系统可以选择性地覆盖某些拒绝以防止完全阻止该子部分的更新。

公开(公告)号：US20020147886A1

公开(公告)日：2002-10-10

申请号：US10100760

申请日：2002-03-19

Inventor： Moshe Yanai ,  Natan Vishlitzky ,  Bruno Alterescu ,  Daniel Castel

IPC: G06F012/00

CPC classification number: G06F11/2071 ,  G06F3/0601 ,  G06F3/0608 ,  G06F3/061 ,  G06F3/0619 ,  G06F3/064 ,  G06F3/065 ,  G06F3/0661 ,  G06F3/0689 ,  G06F11/2066 ,  G06F11/2074 ,  G06F11/2079 ,  G06F11/2082 ,  G06F2003/0697 ,  G11B20/1217 ,  H04L29/06 ,  H04L67/1095 ,  H04L69/26 ,  H04L69/40 ,  Y10S707/99942

Abstract: An apparatus and method for disk mapping and data retrieval includes a data storage medium on which has been stored a plurality of data records. Each record includes at least a record identification portion, for uniquely identifying each record from among the plurality of data records. The apparatus builds a record locator table and high speed semiconductor memory which comprises the unique record identifiers for the records on the storage medium as well as a record locator index generated by the apparatus, which indicates the address of the data record on the storage medium. Data retrieval is facilitated by first searching the record locator table in high speed semiconductor memory for a requested data record. Utilizing the record locator index associated with the requested data record, the system directly accesses the requested data record on the storage medium thereby minimizing storage medium search time. Also disclosed is an apparatus and method for converting CKD formatted data records to FBA formatted disk drives and for building and compressing the nullcountnull portion of the CKD data formatted record into a record locator table.

Abstract translation: 用于盘映射和数据检索的装置和方法包括其上已经存储有多个数据记录的数据存储介质。 每个记录至少包括记录识别部分，用于从多个数据记录中唯一地识别每个记录。 该装置构建记录定位器表和高速半导体存储器，其包括用于存储介质上的记录的唯一记录标识符以及由设备生成的记录定位符索引，其指示存储介质上的数据记录的地址。 通过首先在高速半导体存储器中搜索用于所请求的数据记录的记录定位器表，便于数据检索。 利用与请求的数据记录相关联的记录定位符索引，系统直接访问存储介质上的所请求的数据记录，从而最小化存储介质搜索时间。 还公开了一种用于将CKD格式化数据记录转换为FBA格式的磁盘驱动器并用于将CKD数据格式化记录的“计数”部分建立并压缩到记录定位器表中的装置和方法。

公开(公告)号：US06446176B1

公开(公告)日：2002-09-03

申请号：US09521341

申请日：2000-03-09

Applicant: Christopher J. West ,  Scott Adam States

Inventor： Christopher J. West ,  Scott Adam States

IPC: G06F1100

CPC classification number: G06F11/2066 ,  G06F11/2074

Abstract: A method and system for transferring data from a primary storage system to a secondary storage system in which the primary storage system includes primary storage volumes and a primary bridge volume and the secondary storage system includes secondary storage volumes and a secondary bridge volume. A link between the primary bridge volume and the secondary bridge volume is established. The data to be transferred from a primary storage volume to a corresponding secondary storage volume is then copied onto the primary bridge volume by using pointers to the data of the primary storage volume (internal snapshot copy). Snapshot copied data is then transferred from the primary bridge volume to the secondary bridge volume over the link. The data is then moved from the secondary bridge volume to the secondary storage volume corresponding to the primary storage volume to put the primary storage volume and the corresponding secondary storage volume in synchronization. This process enables the use of bridge volumes to handle data synchronization responsibilities in addition to data transferring responsibilities thereby allowing the host to not have to compete for access to primary storage volumes.

Abstract translation: 一种用于将数据从主存储系统传送到辅助存储系统的方法和系统，其中所述主存储系统包括主存储卷和主网桥卷，并且所述辅助存储系统包括辅助存储卷和辅助桥卷。 建立主桥体积和次桥体积之间的连接。 然后，通过使用指向主存储卷（内部快照副本）的数据的指针将要从主存储卷传输到相应辅助存储卷的数据复制到主网桥卷上。 然后，快照复制的数据从主桥卷传输到链路上的辅桥网络卷。 然后将数据从辅助网桥卷移动到与主存储卷对应的辅助存储卷，以使主存储卷和相应的辅助存储卷同步。 除了数据传输责任之外，此过程还能够使用桥卷来处理数据同步责任，从而允许主机不必竞争访问主存储卷。

公开(公告)号：US20020078296A1

公开(公告)日：2002-06-20

申请号：US09797479

申请日：2001-02-28

Inventor： Yasuaki Nakamura ,  Hideo Tabuchi ,  Akinobu Shimada ,  Toshio Nakano

IPC: G06F012/16

CPC classification number: G06F11/2071 ,  G06F11/1461 ,  G06F11/2064 ,  G06F11/2066 ,  G06F11/2082 ,  G06F2201/82 ,  Y10S707/99953 ,  Y10S707/99955

Abstract: A storage system data duplication method for copying data of a plurality of logical volumes possessed by a first storage system to a second storage system includes the steps of: (a) copying the data of the plurality of logical volumes to the second storage system; (b) interrupting copying of the data of the plurality of logical volumes to the second storage system; (c) starting copying of data of one or more of the plurality of logical volumes to the second storage system; and starting copying of data of ones of the plurality of logical volumes other than the one or more logical volumes to the second storage system as delayed from the step (c), shortening a time taken until completion of data duplication on recreation of a group of paired logical volumes in a volume group after remote copy is temporarily stopped.

Abstract translation: 一种用于将由第一存储系统拥有的多个逻辑卷的数据复制到第二存储系统的存储系统数据复制方法，包括以下步骤：（a）将多个逻辑卷的数据复制到第二存储系统; （b）中断将所述多个逻辑卷的数据复制到所述第二存储系统; （c）开始将所述多个逻辑卷中的一个或多个的数据复制到所述第二存储系统; 以及从所述步骤（c）开始将所述多个所述逻辑卷中的一个以上的逻辑卷的数据的数据复制到所述第二存储系统，从而缩短在重新构建一组 远程复制后暂时停止卷组中的配对逻辑卷。