Abstract: An apparatus, method, and system for updating a file index in a search engine in a data backup system to reflect file changes introduced in a new backup is disclosed. The operations comprise: generating a first external file, the first external file comprising file hashes for files already indexed in a file index in a search engine of a data backup storage system that are not associated with a deleted status; generating a second external file, the second external file comprising file hashes for files in a new backup; determining one or more file changes introduced in the new backup based on a comparison between the first external file and the second external file; and updating the file index in the search engine to reflect the one or more file changes introduced in the new backup.

Abstract: File metadata of a virtual machine can be generated when performing a backup of a virtual machine. A backup copy of the virtual machine and the file metadata can be stored in a backup storage system. The file metadata can be retrieved from the storage system in a manner that is decoupled from the performance of the backup of the virtual machine. The file metadata can be used for searching for files within the backup copy of the virtual machine.

Abstract: According to one embodiment, one or more consistent states of a virtual machine (VM) are backed up and stored. An index library is used to extract, from the consistent state(s) of the VM, metadata corresponding to content files captured in the consistent state(s). The extracted metadata is stored into a metadata catalog, where the metadata catalog is subsequently downloaded by an index server to index the content files captured in the consistent state(s).

Abstract: The present disclosure relates to a method, apparatus and computer program product for managing a virtual machine. According to example implementations of the present disclosure, there is provided a method for managing a virtual machine. In the method, in response to receiving a backup request for the virtual machine, corresponding metadata of a corresponding object of at least one object in the virtual machine is obtained, the corresponding metadata describing multiple attributes of the corresponding object in a file system of the virtual machine. A corresponding abstract describing a basic attribute of multiple attributes of the corresponding object is generated on the basis of the corresponding metadata. An index of a backup version of the virtual machine is created on the basis of the corresponding abstract, the index comprising a corresponding path of the corresponding object in the backup version of the virtual machine.

Abstract: The present disclosure provides a backlight source monitoring device and a pattern generator. The backlight source monitoring device includes a base, a fixing structure arranged on the base and configured to fix a backlight source to be monitored, a monitoring element fixed on the base and configured to monitor a brightness value of the backlight source to obtain brightness data, and a display element connected with the monitoring element and configured to receive and display the brightness data obtained by the monitoring element.

Abstract: Embodiments of the present disclosure provide a method and device for managing document indexes. The method includes: in response to a request for adding a target segment to a document set including a plurality of segments, determining an original segment associated with the target segment from the plurality of segments; partitioning the original segment into a first portion and a second portion, the first portion being used to update the original segment, the second portion being used as the target segment; and rebuilding indexes for documents in the target segment.

Abstract: The present disclosure provides a backlight source monitoring device and a pattern generator. The backlight source monitoring device includes a base, a fixing structure arranged on the base and configured to fix a backlight source to be monitored, a monitoring element fixed on the base and configured to monitor a brightness value of the backlight source to obtain brightness data, and a display element connected with the monitoring element and configured to receive and display the brightness data obtained by the monitoring element.