Emc IP Holding Company LLC

Otis Elevator Company

Fei Long

John Duncan Bankier

Ronald Brown

Tianfang Xiong

Hongru Xu

Qiu Shang

Yue Qian

Zexian Liao

Xianfeng Wang

Yuan Luo

Meihong Mao

Rongrong Shi

Yaxin Zhang

Honglei Qu

A method, computer program product, and computing system for establishing a first file system protocol connection between a first storage system and a second storage system. A security descriptor of one or more electronic files on the first storage system may be queried for security-related information using the first file system protocol connection. Security-related information associated with a first file system protocol and security-related information associated with a second file system protocol may be migrated from the first storage system to the second storage system.

Multi-protocol migration system and method

An elevator door interlock assembly and an elevator system. The elevator door interlock assembly includes: a first base plate on which a common rotating shaft is arranged; a first hanging wheel, which is pivotally connected to the first base plate through the common rotating shaft and guides the first base plate to reciprocate in an opening and closing direction of an elevator door; and a first lock arm, a middle part of which is pivotally connected to the first base plate through the common rotating shaft, so as to rotate between a locked position and a released position when the elevator door is closed.

Interlock assembly for elevator door and elevator system

Techniques manage application systems in an application environment. The application environment includes a first application system, a second application system and a third application system. First snapshot information of a first group of snapshots of the first application system is obtained, the first application system being in active state. Second snapshot information of a second group of snapshots of the second application system is obtained, the second application system being in standby state. It is determined whether the second application system and the third application system have a common snapshot based on the first snapshot information and the second snapshot information. Data is synchronized to the third application system depending on whether the second application system and the third application system have a common snapshot. Overheads required during data synchronization may be reduced as far as possible, and the efficiency of data synchronization may be improved.

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

A method, computer program product, and computer system for creating, by a computing device, a first directory entry with a name using a majority protocol, wherein the creation may be done on a source side for a multi-protocol delta copy migration session. Minority protocol name information associated with the first directory entry using the majority protocol may be relayed to a destination side for the multi-protocol delta copy migration session, wherein the minority protocol name information is cached on the destination side. A second directory entry with the name using the majority protocol for the multi-protocol delta copy migration session may be created on the destination side. The name of the second directory entry created using the majority protocol may be reset to the minority protocol name created using the minority protocol name information cached on the destination side.

System and method for preserving a minority protocol name in a multiple protocol migration

Techniques perform data backup. Such techniques involve: in response to a first storage node to be switched to a second storage node, determining whether there is an ongoing data backup operation between the first storage node and a third storage node; and in response to the ongoing data backup operation between the first and third storage nodes, ceasing the data backup operation. The second storage node is used for backing up data of the first storage node in real time and the third storage node is used for backing up the data of the first storage node periodically. Accordingly, colliding operations can be prevented, system resource can be saved and processing efficiency can be improved.

Method, apparatus and computer program product for data replication

Techniques perform data synchronization. The techniques involve: in response to writing of data to a source storage array, determining whether a transmission link between the source storage array and a destination storage array is disconnected, the data being to be synchronized to the destination storage array; in response to determining that the transmission link is disconnected, accumulating in the source storage array the data written to the source storage array; in response to detecting that the transmission link is recovered, creating a snapshot for a storage unit associated with the data in the destination storage array; and in response to crashing of the source storage array during resynchronization of the data accumulated in the source storage array to the storage unit, restoring the storage unit in the destination storage array using the snapshot. Therefore, the storage space for the snapshot is greatly saved while disaster recovery is ensured.

Method, device and computer readable medium for data synchronization

A target data storage system performing a migration operation also responds to client requests by creating and maintaining a metadata cache for caching attributes of a user file as obtained from a source data storage system. A read-type client request is processed by (1) determining whether the metadata cache stores current attribute values, (2) if so, then satisfying the client request using the current values in the metadata cache, and (3) otherwise obtaining current attribute values from the source data storage system and satisfying the client request using the obtained current attribute values, and storing the current values in the metadata cache to be available for use in processing subsequent read-type client requests. A write-type client request is processed forwarding modified attribute values from the client request to the source data storage system for storage therein.

Data storage system with transparent presentation of file attributes during file system migration

A user I/O operation is processed in a file system of a target data storage system (DSS) performing a file system migration. The target DSS assesses a migration state of a user file of the user I/O operation, including (1) determining whether a metadata file storing migration state data for the user file has an already recovered record indicating the migration state of the file, (2) if so, then using the already recovered record to assess the migration state of the user file, and (3) otherwise (a) initiating an on-demand recovery to obtain an on-demand record for the user file, and (b) using the on-demand recovered record to assess the migration state. If the migration state indicates that the file has not yet been migrated, then the user I/O operation is redirected to a separate source DSS, and otherwise the user I/O operation is completed locally at the target DSS.

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Shanghai, China

Fei Long