Emc IP Holding Company LLC

Dell Products Inc.

Qinghua Ling

Xin Zhong

Yan Shao

Yue Yang

Jianbao Li

Lei Han

Yifeng Lu

Yue Qian

Yuan Gu

Yangfeng Chen

Techniques for transmission of replicated data involve acquiring the replicated data from a storage space based on a plurality of replication requests in a replication queue. Such techniques further involve determining whether the plurality of replication requests are added to a plurality of transmission queues from the replication queue. Such techniques further involve removing the plurality of replication requests from the replication queue in response to the plurality of replication requests being added to the plurality of transmission queues from the replication queue. Such techniques further involve transmitting the replicated data to a plurality of target devices based on the plurality of replication requests in the plurality of transmission queues.

Method, device, and computer program product for transmission of replicated data

Techniques for processing compressed data involve: determining, based on parsing of a header of a compressed data packet, a size of original data corresponding to compressed data, wherein the compressed data packet comprises the header, compressed metadata, and the compressed data. The techniques further involve: allocating, based on the size of the original data, a shared buffer space for receiving and converting the compressed metadata and the compressed data; and storing the compressed data packet in the shared buffer space. The shared buffer space can be used for the receiving and conversion processing of compressed data at the same time, without allocating a separate buffer space for each processing, thereby improving the memory efficiency. Since the allocated shared buffer space is used for both receiving processing and conversion processing, the complexity of configuration of a memory pool is also reduced.

Method, device, and computer program product for processing compressed data

Techniques for managing a file system involve in response to receiving, at a first backup device of the file system, a request for replicating data of the file system from the first backup device to a second backup device of the file system, determining a synchronization state between the first backup device and the file system, the second backup device being a backup device located downstream of the first backup device; creating, based on the synchronization state, a target snapshot associated with the file system; and causing the data to be replicated from the first backup device to the second backup device based on the target snapshot. Therefore, the data backup flexibility and accuracy of a file system can be significantly improved and therefore the reliability of the whole system may be enhanced.

Method, device, and computer program product for managing file system

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.

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Qinghua Ling