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:
Oct. 13, 2015
Filed:
Dec. 27, 2013
Google Inc., Mountain View, CA (US);
Alexander Kesselman, Sunnyvale, CA (US);
Michael O'Reilly, Sydney, AU;
George Datuashvili, Sunnyvale, CA (US);
Alexandre Drobychev, San Mateo, CA (US);
GOOGLE INC., Mountain View, CA (US);
Abstract
Placement of object replicas in a distributed storage system includes, at a first instance, opening a journal for storage of object chunks. Each journal is associated with a single placement policy. An object is received, which comprises a chunk. The object has a placement policy, and the chunk comprises a plurality of storage blocks. The blocks are stored in a journal that matches the placement policy. Global metadata for the object is stored, which includes a list of chunks for the object. Local metadata for the chunk is stored, which includes a block list identifying each block of the plurality of blocks. The local metadata is associated with the journal. The journal is later closed. The journal is subsequently replicated to a second instance according to the placement policy. The global metadata is updated to reflect the replication, whereas the local metadata is unchanged by the replication.