Abstract: This disclosure describes, in part, techniques for generating captions for audio content items. For instance, a system may store a user profile that is associated with audio content items. When a user associated with the user profile requests captions, the system may determine which audio content items have available captions and which audio content items do not have available captions. For the audio content items that do not have available captions, the system may determine priorities for the audio content items. The system may then cause the captions to be generated based on the priorities. When the captions are generated, the system may update statuses of the audio content items to indicate that the captions are available. The system may further store the captions in a database that is accessible to the user.

Abstract: This disclosure describes, in part, techniques for providing captions with audio content. For instance, an electronic device may receive first data representing audio content and second data representing captions that are available for the audio content. The electronic device may then select portions of the captions for display while outputting the audio content. In some instances, the electronic device selects the portions using timestamps represented by the second data. For instance, the electronic device may select a portion of the captions such that the portion of the captions begins at a first pause within the audio content and/or ends at a second pause within the audio content. In some instances, the electronic device may also display graphical elements that indicate the current location within the captions.

Abstract: A technique is directed to cleaning a log structure. The technique involves identifying extents (e.g., a contiguous segment of 8 MB) to reclaim from a first storage tier of a set of storage tiers containing the log structure. The technique further involves performing a tier selection operation to select a target storage tier from the set of storage tiers based on a utilization measure of the log structure. The technique further involves, after identifying the extents to reclaim and performing the tier selection operation, storing data from the identified extents into a new extent of the target storage tier and freeing the identified extents. Such a technique combines log cleaning and tiering into a single operation thus placing less stress on storage devices (e.g., less wear on flash memory, etc.), consuming fewer system resources, and providing better performance.

Abstract: A technique for managing spare disk drives in a data storage system includes transferring segments of data from disk drives of an operating RAID group to spare regions on a set of spare disk drives to create unused space in the disk drives of the RAID group, thus using the spare regions to overprovision storage in the RAID group. Upon a failure of one of the disk drives in the RAID group, data of the failing disk drive are rebuilt based on the segments of data as well as on data from still-functioning disk drives in the RAID group. Thus, the spare disk drives act not only to overprovision storage for the RAID group prior to disk drive failure, but also to fulfill their role as spares in the event of a disk drive failure.