The present disclosure relates to a method, an electronic device, and a computer program product for monitoring a storage system. For example, a method of monitoring a storage system is provided. This method may include setting a quota type of a folder to be monitored in the storage system to a monitored type. This method may further include acquiring quota monitoring data of which the quota type is the monitored type from a quota monitoring report associated with the storage system. In addition, this method may further include generating storage information of the folder based on the quota monitoring data. In this way, the time spent on monitoring the storage system can be shortened, the system resources can be saved, and ultimately, the user experience can be improved.

A method, a device, a node and a system for managing file in distributed data warehouse are provided. The method includes: acquiring, by a data node, a deleting instruction carrying a data block identifier, wherein the deleting instruction is sent by a management node; suspending, by the data node, the deleting instruction; and deleting, by the data node, a data block corresponding to the data block identifier after a condition is met, thereby resolving the technical issue that an accidentally deleted file can not be recovered by setting a trash in the management node in some cases and ensuring the data security of the Hadoop system.

A computing device of a database system includes a plurality of processing modules, a computing device operating system, and an application specific operating system. The application specific operating system includes at least one custom instruction set that configures operation of a configurable set of processing modules of the plurality of processing modules based on generating, for each processing module of the configurable set of processing modules, a corresponding configuration signal indicating a selected instruction set of either the computing device operating system or the application specific operating system. Each processing module of the configurable set of processing modules operates in accordance with the selected instruction set based on the corresponding configuration signal.

A method and apparatus for reserving a usable storage space on a storage device is provided. The method includes collecting context data representing an environment surrounding the storage device; selecting at least one file from among files stored in the storage device by using at least one of the context data and user profile data; and processing the selected file and reserving a usable storage space on the storage device. The method reserves the usable storage space by using the context data or user profile data, thereby allowing efficient reserving of usable storage space without a user's manual intervention and preventing waste of unnecessary resources.

Various examples described herein provide for migrating a file between a non-persistent memory file system and a persistent memory file system. In particular, some examples detect, on a non-persistent memory file system, a file that has been memory-mapped while being accessed from the non-persistent memory file system by a computer system, and the detected file is migrated from the non-persistent memory file system to the persistent memory file system.

A method of constructing a database in an on-vehicle device includes the steps of connecting a mobile terminal storing a plurality of pieces of music and music information associated with each of the plurality of pieces of music, acquiring the music information of each piece of music from the mobile terminal, when the acquired music information is stored in a storage space, determining whether free capacity of the storage space is insufficient, and when it is determined that the free capacity of the storage space is insufficient, removing at least one piece of music information of each piece of music from the storage space, and constructing a database for searching music on the basis of the music information stored in the storage space.

Provided are a high-performance distributed storage apparatus and method. The high-performance distributed storage method includes receiving and storing file data by a chunk unit, outputting file data chunks stored in an input buffer and transmitting the file data chunks to data servers in parallel, additionally generating a new file storage requester to connect the new file storage requester to a new data server based on a data input speed of the input buffer and a data output speed at which data is output to the data server, re-setting a file data chunk output sequence for a plurality of file storage requesters including the new file storage requester, and applying a result of the re-setting to output and transmit the file data chunks stored in the input buffer to the data servers in parallel.

Techniques for efficiently managing a file clone from a filesystem which supports efficient volume snapshots are provided. In some embodiments, a system may receive an instruction to remove the file clone from the filesystem. The file clone may be a point-in-time copy of metadata of an original file. The system may further—for a file map entry in a filesystem tree associated with the file clone, the file map entry indicating a data block—decrement a reference count in a reference count entry associated with the file map entry. The reference count entry may be stored in the filesystem tree according to a key and the key may comprise an identification of the original file. The system may further reclaim the data block in a storage system when the reference count is zero.

In one embodiment, a system for managing a virtualization environment includes a set of host machines, each of which includes a hypervisor, virtual machines, and a virtual machine controller, and a virtualized file server backup system configured to identify backup data, wherein the backup data comprises data stored on the virtual disks and VFS configuration information, and the first data is identified in accordance with a backup policy, send the backup data to one or more remote sites for storage, and, in response to detection of changes in the backup data, send the changes to the remote sites in accordance with a replication policy. The backup data may be identified based on a protection domain associated with the backup policy. The data stored on the VFS may include one or more storage objects. The storage objects may include shares, groups of shares, files, or directories.

Methods and systems are disclosed for optimizing record placement in a graph by minimizing fragmentation when writing data. Issues with fragmented data within a graph database are addressed on the record level by placing data that is frequently accessed together contiguously within memory. For example, a dynamic rule set may be developed based on dynamically analyzing access patterns of the graph database, policies, system characteristics and/or other heuristics. Based on statistics regarding normal query patterns, the systems and methods may identify an optimal position for certain types of edges that are often traversed with respect to particular types of nodes.