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. 15, 2022
Filed:
Jun. 30, 2017
Microsoft Technology Licensing, Llc, Redmond, WA (US);
Krishnan Varadarajan, Redmond, WA (US);
Jianwu Gao, Shanghai, CN;
Jegan Devaraju, Redmond, WA (US);
Shane Mainali, Duvall, WA (US);
Zichen Sun, Sammamish, WA (US);
Quan Zhang, Kenmore, WA (US);
Venkates Paramasivam Balakrishnan, Redmond, WA (US);
Shaoyu Zhang, Shanghai, CN;
Kaifeng Zhu, Nanjing, CN;
Ju Wang, Cupertino, CA (US);
Manish Chablani, Redmond, WA (US);
Hao Feng, Bellevue, WA (US);
MICROSOFT TECHNOLOGY LICENSING, LLC, Redmond, WA (US);
Abstract
A distributed storage system includes table controllers collectively storing partitions of a logical table having multiple rows. For each of the partitions, a corresponding table controller stores a subset of the rows of the logical table across individual pages. A management controller updates a schema of the logical table from a first to a second schema definition by, for each of the partitions, sending an update command indicating the second schema definition to the corresponding table controller. The first table controller corresponds to a first partition that includes a first subset of the rows. The first table controller, prior to receiving the update command, includes an identifier of the first schema definition within each page of data for the first subset. Subsequent to receiving the update command, the first table controller, when writing each new page of data for the first subset, includes an identifier of the second schema definition.