Tree Data Structure Copy with Version Priority
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Solution Overview
Problem
Current tree data structure copy operations do not effectively prioritize and manage updates, leading to unnecessary complexity and resource utilization during the copy process.
Innovation Solution
A method involving obtaining a latch for a node, copying its version number, unlatching, copying the node, re-latching, copying the updated version number, and performing actions based on the comparison of these version numbers to prioritize updates over copy operations, ensuring efficient and resource-effective tree data structure copying.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the tree data structure is copied while it is being used, then the system can maintain operational continuity and avoid downtime, but write conflicts may occur and update management becomes complex
Solution Approach 1:
The patent applies preliminary action by capturing the version number of each node before copying it. This allows the system to record the state of the node at the time of copying, and then later verify whether the node was modified during the copy operation by comparing version numbers. This preliminary version capture enables the copy operation to proceed without blocking writes, while still ensuring data consistency can be verified afterward.
Solution Approach 2:
The patent implements feedback by comparing the version number captured before copying with the current version number after copying. This feedback mechanism determines whether the copy operation successfully captured the intended node state or if the node was modified during copying. Based on this feedback, the system can decide whether to retry the copy or accept the modified state, thus managing update conflicts without requiring complex locking mechanisms.
2Reliability
If traditional locking mechanisms are used during tree copy operations, then data consistency can be ensured, but resource utilization increases and performance decreases
Solution Approach 1:
The patent applies the copying principle by creating a duplicate of the tree data structure rather than modifying the original during the copy operation. The system copies nodes from the source tree to a destination tree, allowing the original tree to remain accessible and modifiable. This copying approach inherently ensures data consistency because the copy operation works on a separate structure, eliminating the need for locking mechanisms that would block writes and degrade performance.
3Productivity
If updates are prioritized over copy operations, then write operations complete faster with fewer conflicts, but copy operations may need to be retried
Solution Approach 1:
The patent applies preliminary action by capturing the version number at the start of the copy operation. This version capture happens before any potential conflicts with write operations, establishing a baseline for later verification. This allows write operations to proceed immediately without being blocked, while the copy operation can later verify its success by comparing version numbers, thus prioritizing writes without completely abandoning the copy timing.
Solution Approach 2:
The patent implements dynamics by making the copy operation adaptive to write operations. Instead of using a static locking mechanism that would block writes, the system dynamically checks version numbers to determine whether a node was modified during copying. If modifications are detected, the copy operation can retry or adjust its approach. This dynamic verification allows write operations to proceed at full speed while providing a mechanism to handle copy conflicts when they occur.
Data Source
AI summary
A computer-implemented method according to one embodiment includes obtaining a first latch for a first node within a tree data structure; copying a first version number of the first node; unlatching the first node; copying the first node; latching the first node a second time after completing the copying; copying a second version number of the first node; and performing one or more actions in response to a comparison of the first version number and the second version number.