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:
Feb. 11, 2020
Filed:
Jun. 30, 2016
International Business Machines Corporation, Armonk, NY (US);
Sandeep Tata, San Jose, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Augmenting data files in a repository of an append-only file system includes maintaining a companion metadata file for each corresponding data file in a map-reduce system using the append-only file system. Each companion metadata file tracks a logical end-of-file (EOF) for each data file. Global versioning of each companion metadata is maintained. A map-reduce append job is performed for a set of data files using a current global version number for the companion metadata file. The map-reduce job including multiple append tasks. For each successful append job, a logical EOF for each appended file is incremented to a new physical EOF. For each failed append task of the append job, a logical EOF is maintained for each failed append task by not incrementing the logical EOF for each failed append task.