Abstract: Embodiments of the present disclosure provide a method, a device and a computer program product for storing metadata. The method comprises determining, based on a set of metadata items to be stored, a first sequence and a second sequence, wherein the first sequence and the second sequence each include a plurality of key-value pairs, each key-value pair including a metadata item from the set of metadata items and a keyword corresponding to the metadata item in the set. The method also comprises causing a first co-routine to utilize available computing resources to process the first sequence. The method further comprises in response to an amount of computing resources available for the first co-routine to process the first sequence being below a first threshold, causing a second co-routine to process the second sequence, wherein the second co-routine is different from the first co-routine.

Abstract: Embodiments of the present disclosure relate to method and apparatus for data protection. For example, there is provided a computer-implemented method. According to the computer-implemented method, it only needs to read the changed data to be protected rather than the entire data to be protected during the procedure of generating a redundant data portion for the changed data to be protected. Thus, I/O and memory consumptions can be reduced.

Abstract: Embodiments of the present disclosure provide methods, apparatuses, a system and computer program products for managing storage units. According to embodiments of the present disclosure, it is determined whether a first storage unit allocated at a first node is reclaimable, wherein data in the first storage unit is backed up to a second storage unit at a second node. In response to determining that the first storage unit is reclaimable, a condition to be satisfied for reclaiming the second storage unit is determined. A command indicating the condition is sent to the second node, such that the second node reclaims the second storage unit in response to the condition being satisfied. Moreover, in response to the command being sent, the first storage unit is reclaimed. The embodiments of the present disclosure enable timely reclaiming of storage units, thereby improving utilization of the storage space effectively.

Abstract: Embodiments of the present disclosure provide a method, a device and a computer program product of storage management. According to example implementations of the present disclosure, in response to data to be replicated from a first storage zone to a second storage zone, a utilization rate of resources associated with the replication is determined; the utilization rate of the resources is compared with a predetermined threshold utilization rate; and in response to the utilization rate of the resources being less than the threshold utilization rate, the replication of the data is initiated from the first storage zone to the second storage zone. Therefore, the present disclosure can automatically adjust replication behaviors for various scenarios, thereby realizing a more flexible data replication policy, and enabling more efficient use of various resources.

Abstract: A method, apparatus and computer program product for managing a storage system are provided. For example, in a method, a tree index of the storage system is obtained, where a leaf node among multiple leaf nodes in the tree index comprising a keyword and an attribute of an object among multiple objects in the storage system. Respective attributes of nodes in a set of the multiple leaf nodes in the tree index are obtained, and the set of the multiple leaf nodes having a same parent node. The tree index is updated based on respective attributes of the leaf nodes in the set of the multiple leaf nodes. With the above example implementations, performance of the index of the storage system can be increased, and further overall response speed of the storage system can be improved. Further, there is provided an apparatus and computer program product for managing a storage system.

Abstract: Embodiments of the present disclosure provide a method and device for storing data. The method comprises: generating a data block corresponding to data to be stored; aligning the data block to a boundary of a tracking unit of a predefined size for validating the data; and storing the aligned data block in at least one storage unit of a storage space, the at least one storage unit having an identical size. The method according to embodiments of the present disclosure can align the data block so as to minimize the waste of storage space and avoid the situation where the rest data cannot be validated due to disappearance of partial data.

Abstract: Embodiments of the present disclosure relate to method and apparatus for data protection. For example, there is provided a computer-implemented method. According to the computer-implemented method, it only needs to read the changed data to be protected rather than the entire data to be protected during the procedure of generating a redundant data portion for the changed data to be protected.

Abstract: Embodiments of the present disclosure provide a method and device for storing data. The method comprises: generating a data block corresponding to data to be stored; aligning the data block to a boundary of a tracking unit of a predefined size for validating the data; and storing the aligned data block in at least one storage unit of a storage space, the at least one storage unit having an identical size. The method according to embodiments of the present disclosure can align the data block so as to minimize the waste of storage space and avoid the situation where the rest data cannot be validated due to disappearance of partial data.

Abstract: A method of controlling a hard disk and an electronic device, comprising: determining a number of power cycles that have been completed by the hard disk at a time point within a predetermined period of time, a power cycle including a total duration of the hard disk in a spin-on mode and an immediately neighboring spin-off mode; and in response to the number of power cycles that have been completed being below an upper limit number for the power cycles of the hard disk in the predetermined period of time, determining remaining time of the predetermined period of time starting from the time point, and determining, based on the remaining time, the number of power cycles that have been completed, and the upper limit number, a threshold idle duration for controlling the hard disk to enter the spin-off mode.

Abstract: Embodiments of the present disclosure relate to method and apparatus for data protection. For example, there is provided a computer-implemented method. According to the computer-implemented method, it only needs to read the changed data to be protected rather than the entire data to be protected during the procedure of generating a redundant data portion for the changed data to be protected. Thus, I/O and memory consumptions can be reduced.

Abstract: Embodiments of the present disclosure provide a method and device for storing data. The method comprises: generating a data block corresponding to data to be stored; aligning the data block to a boundary of a tracking unit of a predefined size for validating the data; and storing the aligned data block in at least one storage unit of a storage space, the at least one storage unit having an identical size. The method according to embodiments of the present disclosure can align the data block so as to minimize the waste of storage space and avoid the situation where the rest data cannot be validated due to disappearance of partial data.