upthere Assigned Patent

upthere, Inc., Palo Alto, CA, has been assigned a patent (9,659,023) developed by Serlet, Bertrand, Palo Alto, CA, for a “maintaining and using a cache of child-to-parent mappings in a content-addressable storage system.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “Techniques for maintaining and using cached child-to-parent mappings in a content-addressable storage system are provided. A cache of child-to-parent mappings is maintained. Each child-to-parent mapping corresponds to a particular chunk in a hierarchy of chunks stored in a content-addressable chunk store, and maps the particular chunk to a parent chunk in the hierarchy of chunks. The hierarchy of chunks includes a first root chunk associated with a file system volume. In response to a change to the file system volume that causes associating a new root chunk with the file system volume, the cache is updated by adding one or more first child-to-parent mappings based on traversing at least a portion of a current file system hierarchy from the new root chunk, and removing one or more second child-to-parent mappings based on traversing at least a portion of a prior file system hierarchy from the first root chunk.“

The patent application was filed on March 12, 2014 (14/205,982).