Ca, Inc.

Zhiye Wang

Chuanqi Sun

Pengcheng Dun

Friar Yangfeng Chen

Performing a file backup includes receiving a file to backup from a source machine and performing a write operation to write the file to a mount point in a file system on a backup server. The backup also includes intercepting a block-level data block to be written which is generated by the write operation; and writing the block-level data block to a corresponding, respective block of a disk image file having a plurality of blocks.

Backup files to a disk image

Performing a snapshot backup includes initiating, by a snapshot driver, a snapshot of at least a portion of a filesystem; and receiving, by the snapshot driver, a filesystem bitmap from a backup agent. Subsequently, the snapshot driver performs copy-on-write operations based on the filesystem bitmap.

Filesystem independent snapshot driver

A computer-based system includes a backup server, a production server, a recovery agent that executes on the production server, a database on the production server, a backup database on the backup server, and a meta data file on the backup server. The meta data file includes file names, a file directory, and file attributes. The system is configured to copy the metadata file from the backup server to a production server. When the copying of the metadata file from the backup server to the production server is complete, and before or during a time period in which backup data is copied from the backup server to the production server, the system is configured to receive a request from the production server to restore a file from the backup server with a higher priority than other files on the backup server.

Minimizing data recovery window

A method for providing recovery from a remote server to a client includes sending at least one data restore request to the remote server. A data block identifier are received at the client system via a network. A data block associated with the data block identifier is retrieved from a local backup server associated with the client system if the local back up server stores the data block. The data block associated with the data block identifier is received from the remote server if the local backup server does not store the data block. The data block is restored to the client system.

Methods and systems for speeding up data recovery

A system includes a production computer machine that includes an operating system and a driver stack. The driver stack includes a file system layer, a recovery driver, a storage layer, a driver layer, a bus driver layer, and a storage device. The system also includes a backup computer processor coupled to the production computer machine via the recovery driver. The recovery driver is configured to commence a recovery of data from the backup computer processor, receive a disk access request from the file system layer, determine if the disk access request accesses data that has not yet been recovered from the backup computer processor, and initiate an on-demand recovery request from the backup computer processor when the data has not been recovered from the backup computer processor.

Data disaster recovery

A system includes a proxy processor configured to simulate a virtual disk, and a daemon processor in communication with the proxy processor and a backup repository. The proxy processor is configured to receive from an application a read request or a write request and to direct the read request or the write request to the daemon processor. The daemon processor is configured to receive the read request from the proxy processor and to access the backup repository or the simulated virtual disk, and to receive the write request from the proxy processor and to write data in the write request to the simulated virtual disk.

Data recovery using conversion of backup to virtual disk

System and method for data disaster recovery

A system and method for testing a computer program using a computer system includes a plurality of computer systems communicating using a network. An interface parser module defines at least one program interface in a program file of a specified program. A fuzzer module reads the program file and identifies the program interfaces. An attack data generator module attacks the program interfaces and communicates with the fuzzer, and the fuzzer determines vulnerabilities in the specified program. A recorder records the attacking procedure. A verifier verifies remedies for vulnerabilities by replaying the attacking procedure of the program interface and determining vulnerabilities. A service status detective module restarts the specified program when the specified program ceases to operate or crashes.

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Beijing, China

Zhiye Wang