The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 19, 2014
Filed:
Apr. 20, 2012
Max Laier, Seattle, WA (US);
John Benjamin Brazel, Seattle, WA (US);
Max Laier, Seattle, WA (US);
John Benjamin Brazel, Seattle, WA (US);
EMC Corporation, Hopkinton, MA (US);
Abstract
The various embodiments are directed towards enabling a versioned coalescer to defer when data blocks cached in unstable storage may be flushed to stable storage. In at least one of the various embodiments, deferring the flushing of cached data blocks until they are read may avoid having to periodically suspend cache operations to flush all cached data from unstable storage to stable storage. In at least one of the various embodiments, if data blocks may be written, a versioned coalescer may cache the data blocks in a high-performance node cache that may be dedicated to a node in a distributed file system. Further, if a process requires a snapshot of at least a portion of the file system a versioned coalescer may examine the node caches for each node. If a node cache contains relevant data blocks the versioned coalescer may insert a snapshot sentinel into the node cache.