Container VM Volume Cloning Across Distributed Nodes
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Solution Overview
Problem
Existing storage systems face inefficiencies in managing and optimizing data storage operations, particularly in flash storage systems, where lower-level processes often perform tasks that can lead to unnecessary write operations and reduced reliability.
Innovation Solution
A direct-mapped flash storage system that addresses data blocks directly without translation by the storage controllers, allowing the operating system to initiate and control processes such as data rewriting and erasure, thereby reducing redundant operations and enhancing reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If storage controllers perform lower-level data management processes, then data storage operations can be automated, but unnecessary write operations increase and reliability decreases
Solution Approach 1:
The patent extracts the data management process from the storage controller and places it directly in the flash storage device. The flash storage device now directly receives and processes data blocks from the operating system without controller intervention, eliminating the controller's ability to perform harmful lower-level operations while maintaining automation of essential storage functions.
Solution Approach 2:
The flash storage device performs its own data management operations directly, such as handling data blocks, managing wear leveling, and controlling write operations autonomously based on OS commands. This self-service approach prevents the storage controller from interfering with reliability-critical operations while maintaining system automation.
2Ease of operation
If storage controllers translate and manage data blocks, then data storage can be controlled centrally, but redundant write operations increase and component wear increases
Solution Approach 1:
The patent removes the data block translation and management function from the storage controller and implements it directly in the flash storage device. This extraction eliminates redundant write operations caused by controller translation while preserving centralized control through direct OS-to-storage communication.
Solution Approach 2:
The operating system acts as an intermediary between the user and the flash storage device, directly issuing data block commands without controller translation. This eliminates the storage controller as a mediating layer that causes redundant writes, while maintaining centralized control through OS-level management.
3Device complexity
If multiple storage drives operate independently, then system complexity is reduced, but coordination across drives becomes difficult
Solution Approach 1:
The patent merges the control functions for multiple storage drives into a unified operating system-level management system. The OS directly coordinates data block operations across all flash storage devices, eliminating the need for complex controller-level coordination while maintaining drive independence and reducing overall system complexity.
Data Source
AI summary
An example method for facilitating virtual machines running in a container system includes determining, by a distributed storage management system, that a volume includes a disk image for providing virtual machines in a container system; copying, by the distributed storage management system and based on the determining that the volume includes the disk image, the volume to a plurality of nodes in the container system; and producing, by the distributed storage management system and based on the copying, a clone of the volume on a particular node of the plurality of nodes to start a virtual machine on the particular node.