Resource management techniques, such as cache optimization, are employed to organize resources within caches such that the most requested content (e.g., the most popular content) is more readily available. A service provider utilizes content expiration data as indicative of resource popularity. As resources are requested, the resources propagate through a cache server hierarchy associated with the service provider. More frequently requested resources are maintained at edge cache servers based on shorter expiration data that is reset with each repeated request. Less frequently requested resources are maintained at higher levels of a cache server hierarchy based on longer expiration data associated with cache servers higher on the hierarchy.

Apparatus and method for managing metadata in a data storage device. In some embodiments, a metadata object has entries that describe data sets stored in a non-volatile write cache. During an archival (persistence) operation, the metadata object is divided into portions, and the portions are copied in turn to a non-volatile memory at a rate that maintains a measured latency within a predetermined threshold. A journal is formed of time-ordered entries that describe changes to the metadata object after the copying of the associated portions to the non-volatile memory. The journal is subsequently stored to the non-volatile memory, and may be subsequently combined with the previously stored portions to recreate the metadata object in a local memory. The measured performance latency may be related to a specified customer command completion time (CCT) for host commands.

Among other things, embodiments of the present disclosure improve the functionality of electronic messaging and imaging software and systems by enabling users to generate customized media overlays that can be shared with other users. For example, media overlays can be generated by the system and displayed in conjunction with media content (e.g., images and/or video) generated by an image-capturing device (e.g., a digital camera). In some embodiments, existing media overlays may be used by users to create derivative media overlays. The system may track usage of media overlays and any derivatives created based thereon, and allow users to control the distribution and use of their overlays in future derivatives. In some embodiments, for example, a user can modify an overlay they created and cause the modification to propagate to all derivative overlays based on the user's overlay.

Implementations disclosed herein include a method comprising detecting a workload request from a host, estimating a media cache fill-up rate based on the detected workload request, estimating a current media cache usage, predicting, based on the detected workload request, the estimated media cache fill-up rate and the estimated current media cache usage, a workload profile, and determining a preemptive media cache cleaning strategy based on the predicted workload profile.

Resource management techniques, such as cache optimization, are employed to organize resources within caches such that the most requested content (e.g., the most popular content) is more readily available. A service provider utilizes content expiration data as indicative of resource popularity. As resources are requested, the resources propagate through a cache server hierarchy associated with the service provider. More frequently requested resources are maintained at edge cache servers based on shorter expiration data that is reset with each repeated request. Less frequently requested resources are maintained at higher levels of a cache server hierarchy based on longer expiration data associated with cache servers higher on the hierarchy.

Apparatus and method for managing metadata in a data storage device. In some embodiments, a metadata object has entries that describe data sets stored in a non-volatile write cache. During an archival (persistence) operation, the metadata object is divided into portions, and the portions are copied in turn to a non-volatile memory at a rate that maintains a measured latency within a predetermined threshold. A journal is formed of time-ordered entries that describe changes to the metadata object after the copying of the associated portions to the non-volatile memory. The journal is subsequently stored to the non-volatile memory, and may be subsequently combined with the previously stored portions to recreate the metadata object in a local memory. The measured performance latency may be related to a specified customer command completion time (CCT) for host commands.

In accordance with some embodiments, a separate pipe is used in graphics processor for handling accesses, namely reads, to read only (RO) surfaces within caches. Moreover, the caches may have defined read only section and defined read write (RW) sections. The read only section may be accessed through a dedicated read only pipe and the read write section may be accessed through a read write pipe for those surfaces that can also be written. Thus, the read only sections are handled in a read only fashion without the need to accommodate writes.

Among other things, embodiments of the present disclosure improve the functionality of electronic messaging and imaging software and systems by enabling users to generate customized media overlays that can be shared with other users. For example, media overlays can be generated by the system and displayed in conjunction with media content (e.g., images and/or video) generated by an image-capturing device (e.g., a digital camera). In some embodiments, existing media overlays may be used by users to create derivative media overlays. The system may track usage of media overlays and any derivatives created based thereon, and allow users to control the distribution and use of their overlays in future derivatives. In some embodiments, for example, a user can modify an overlay they created and cause the modification to propagate to all derivative overlays based on the user's overlay.

Memory descriptor list caching and pipeline processing techniques are described. In one or more examples, a method is configured to increase efficiency of buffer usage within a pipeline of a computing device. The method includes creation of a buffer in memory of the computing device and caching of a memory descriptor list by the computing device that describes the buffer in a buffer information cache and has associated therewith a handle that acts as a lookup to the memory descriptor list. The method also includes passing the handle through the pipeline of the computing device for processing of data within the buffer by one or more stages of the pipeline such that access to the data is obtained by the one or more stages by using the handle as the lookup as part of a call to obtain the memory descriptor list for the buffer from the buffer information cache.

Among other things, embodiments of the present disclosure improve the functionality of electronic messaging and imaging software and systems by enabling users to generate customized media overlays that can he shared with other users. For example, media overlays can be generated by the system and displayed in conjunction with media content (e.g., images and/or video) generated by an image-capturing device (e.g., a digital camera). In some embodiments, existing media overlays may be used by users to create derivative media overlays. The system may track usage of media overlays and any derivatives created based thereon, and allow users to control the distribution and use of their overlays in future derivatives. In some embodiments, for example, a user can modify an overlay they created and cause the modification to propagate to all derivative overlays based on the user's overlay.