Container Sync Flag to Reduce File System Write Operations

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Solution Overview

Problem

Sync operations to file systems during container image builds consume excessive resources and are unnecessary, as changes in memory are often disregarded if the build fails or system failure occurs, leading to resource wastage.

Innovation Solution

A container orchestration system sets a flag in the metadata of mounted file systems to indicate that sync operations should be ignored, allowing the OS kernel to prevent unnecessary sync operations and report success to processes, thereby reducing resource utilization and extending data availability in memory.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If sync operations are performed to persist container data to file system during build, then data reliability is improved, but resource consumption and build time increase significantly

Engineering Contradiction:

Improvedata persistence reliabilityVSAvoidbuild container speed

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent changes the synchronization parameter by introducing a flag in the file system metadata that indicates whether sync operations should be performed. During container builds, this flag is set to disable sync operations, allowing the build process to proceed without forcing data to persistent storage, thereby improving build speed while maintaining the option to enable sync when reliability is critical

Inventive Principle:

Principle #35Parameter changes

2Reliability

If sync operations are performed to save changes to persistent storage, then data loss prevention is improved, but resource utilization increases unnecessarily when builds may fail

Engineering Contradiction:

Improvedata loss preventionVSAvoidresource wastage

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent applies local quality by making sync operations selective rather than universal. The file system metadata contains a specific flag for the mounted file system that controls whether sync operations are performed. This allows sync to be disabled locally for build containers where it would be wasteful, while potentially remaining enabled for other file systems or containers where data persistence is critical

Inventive Principle:

Principle #3Local quality

3Reliability

If sync operations are performed frequently, then data durability is improved, but write operations to file system increase reducing performance

Engineering Contradiction:

Improvedata durabilityVSAvoiddata access speed

Core Design Contradiction:

ReliabilityVSSpeed

Solution Approach 1:

The patent implements preliminary action by setting the sync-disable flag in the file system metadata before the container build process begins. This preliminary configuration allows the build process to proceed without repeatedly performing sync operations, eliminating the trade-off between durability and speed during the build phase while maintaining the ability to enable sync when needed

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS11921680B2Speedup containers in production by ignoring sync to file system

Publication Date: 2024.03.05 RED HAT INC

AI summary

A method includes receiving, an operation from a container to synchronize container data from memory to a file system mounted by the container and determining whether the file system indicates that the operation is to be ignored. The method further includes, in response to determining that the file system indicates that the operation is to be ignored, preventing, by the operating system kernel executing on the processing device, performance of the operation.