Emc IP Holding Company LLC

International Business Machines Corporation

Xin Zhong

Yan Shao

Yue Yang

Qinghua Ling

Jianbao Li

Lei Han

Yuan Gu

Yangfeng Chen

Qing Hua Ling

Wei Feng

Wai Chuen Yim

Wei Qi

Wenjun Wang

Brian R Tetreault

Zheng Wang

Yongmei Xie

Friar Yangfeng Chen

Wenxuan Yin

Zhou Wu

Techniques for data replication involve: in response to a first source state machine associated with a source file system being booted up, booting up a second source state machine associated with the source file system, the first source state machine performing a first operation for resizing a first storage area of data for replication from the source file system; transmitting a resizing message from the second source state machine to a destination file system, to enable the destination file system to perform a second operation for resizing a second storage area for storing the data to be replicated into the destination file system; and in response to the first operation and the second operation being successfully performed, enabling the data for replication from the source file system to be replicated into the destination file system.

Method, device and computer program product for data replication

Techniques convert a first bitmap into a second bitmap. Such techniques involve determining a first plurality of bits in the first bitmap corresponding to a particular bit in the second bitmap; determining whether the first plurality of bits include a dirty bit as a unit of a processor line width; in response to determining that the first plurality of bits include a dirty bit, setting the particular bit as a dirty bit; and in response to determining that the first plurality of bits do not include a dirty bit, setting the particular bit as a non-dirty bit.

Method, device, and computer-readable storage medium for bitmap conversion

Techniques for backing up data involve receiving, by a proxy server and from an application, a backup request comprising a backup path. The techniques further involve determining a target server associated with backup request according to the backup path, and the proxy server and the target server share the same storage processor. The techniques further involve backing up a file in the target server associated with the backup path. Along these lines, a dedicated proxy server may be provided, and the proxy server may be used to handle backup requests for all file systems on the storage processor. Then, the backup requests can be forwarded to the corresponding target servers through a virtual file system without configuring corresponding Internet protocol (IP) address for each target server.

Method, device and computer program product to backup data

Techniques manage snapshots in an application environment. The application environment includes a first application system and a second application system. A group of snapshots of the first application system are identified in a fracture state where synchronous communication between the first application system and the second application system is paused. A group of snapshot differences between two successive snapshots in the group of snapshots are obtained, the group of snapshots being arranged in chronological order that the group of snapshots are generated. The group of snapshot differences are transmitted from the first application system to the second application system in response to determining the synchronous communication between the first application system and the second application system is resumed. Accordingly, snapshots in the application environment can be managed more effectively, and further data synchronization between the first application system and the second application system may be realized.

Method, device, and computer program product for managing snapshot in application environment

Techniques for managing a storage system involve at a second device: in response to receiving a command to failback a first device, determining a snapshot synchronized between the second device and the first device before a failure of the first device, wherein the first device has been failed over to the second device; causing the first device to be restored based on the snapshot; determining a change in latest data of the second device relative to the snapshot; and synchronizing the change to the first device.

Method, device, and computer-readable storage medium for managing storage system

Techniques perform storage management. Such techniques involve: detecting a change of a size of storage space for a file system, the file system having one or more associated bitmaps, each active bit in the one or more bitmaps indicating data status in storage space not exceeding an upper size limit of the file system; in response to detecting the change, determining, based on the upper size limit, a first number of bits required for indicating the changed storage space; and in response to determining that the first number exceeds a second number of current active bits in the one or more bitmaps, allocating at least one additional active bit for the file system. Accordingly, the number of bits for indicating the file system can be dynamically adjusted based on the changes of the file system.

Method, device and computer program product for storage management

Techniques for data synchronization involve obtaining a first bitmap about a first storage device, the first storage device including a group of storage areas, a bit in the first bitmap indicating whether data in a corresponding storage area of a first size in the group of storage areas is to be synchronized to a second storage device. The technique further involves, in response to a configuration of the first storage device being changed, determining a second size of a storage area in the group of storage areas. The technique further involves converting the first bitmap into a second bitmap based on the first size and the second size. In addition, the technique further involves synchronizing data from the first storage device to the second storage device based on the second size and the second bitmap.

Method, apparatus and computer program product for data synchronization

Embodiments of the present disclosure relate to a method and apparatus for incremental backup. The method comprises receiving a set of file paths to be backed up and parsing each file path in the set of file paths to construct a prefix tree. The method further comprises traversing the prefix tree to read an ordered set of file paths in the prefix tree and performing an incremental backup sequentially according to the ordered set of file paths. Embodiments of the present disclosure sort a set of file paths to be backed up using a prefix tree that shares common path prefixes. Thus, embodiments of the present disclosure can achieve fast sort of the set of file paths, and can effectively save storage space needed for sorting a considerable number of file paths in the memory, thereby reducing the times of comparing file names when sorting file paths.

Method and apparatus for incremental backup based on file paths and a prefix tree

Described are techniques for processing event occurrence. A first notification may be received regarding a first occurrence of a first event. Responsive to receiving the first notification, first processing may be performed that includes mapping the first event to a first profile, and performing second processing using the first profile to collect first data regarding the first occurrence of the first event.

Event triggered data collection

The present invention provides a method and a compiler of compiling a source program. According to an aspect of the present invention, there is provided a method of compiling a source program comprising: identifying a hint related to vector aligning when syntax analyzing said source program; and generating a simplified code based on said identified hint related to vector aligning when generating a code.

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Beijing, China

Xin Zhong