Dynamically varying the number of database replicas

Patent metadata

Field	Value
Publication number	US-9053166-B2
Application number	US-201213710349-A
Country	US
Kind code	B2
Filing date	Dec 10, 2012
Priority date	Dec 10, 2012
Publication date	Jun 9, 2015
Grant date	Jun 9, 2015

Abstract

Embodiments of the invention dynamically vary the number of replicas based on certain conditions to protect users from data loss. The size of the database is one condition that can be used to determine the number of replicas required. A database system may create three replicas. When the database size exceeds a first threshold, a fourth replica may be created. The fourth replica is maintained as long as the database size is above a second threshold that is smaller than the first threshold. However, when the database shrinks below the second threshold, then the fourth replica is deleted. Using two different thresholds in this manner prevents the system from frequently cycling between three and four replicas.

First claim

What is claimed is:

1. A computer-implemented method, comprising:
in the computer having a processor and a memory coupled to the processor, the memory having program instructions stored thereon that, upon execution by the processor, cause the computer to dynamically vary a number of replicas of a database to protect users from data loss by:
creating, by a partition manager, at least three replicas for the database;
monitoring, via a load balancer coupled to the partition manag…

Assignees

• Microsoft Corp
• Microsoft Technology Licensing Llc

Inventors

• Guo Qun
• Mani Pradeep
• Kalhan Ajay

Classifications

• G06F2201/81

  Physics · mapped topic

• G06F16/278

  Physics · mapped topic

• G06F16/951

  Physics · mapped topic

• G06F11/2094 Primary

  Physics · mapped topic

• G06F16/1844 Primary

  Physics · mapped topic