NVRAM Buffer for Object Storage Write Latency
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Solution Overview
Problem
Current object-based storage systems face challenges in efficiently managing data across multiple storage tiers and types, particularly in handling object versioning, replication, and lifecycle management, which affects performance and reliability as storage needs continue to grow.
Innovation Solution
The implementation of a storage system that utilizes non-volatile random access memory (NVRAM) as a buffer for write operations, offloading device management responsibilities from storage drives, and employing erasure coding and mirroring schemes to ensure data redundancy and availability across multiple storage nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional storage systems use standard storage drives for data management, then device management responsibilities are handled directly by storage drives, but write latency increases and unnecessary write operations occur
Solution Approach 1:
The patent introduces NVRAM as an intermediary buffer between the storage drive and the data management system. This mediator handles write operations by buffering data temporarily, allowing the storage drive to be offloaded from direct write management responsibilities. The NVRAM buffer resolves the contradiction by providing fast write access (reducing write latency) while the storage drive focuses on persistent storage, separating management responsibilities from execution.
2Reliability
If storage systems implement comprehensive object versioning and replication, then data reliability improves, but system complexity and management overhead increase
Solution Approach 1:
The patent extracts the complexity of object versioning and replication management from the storage drive itself and relocates it to a centralized storage management system. The storage drive is taken out of the management loop, focusing only on raw storage operations. The management system handles versioning, replication, and data reliability independently, separating the reliability function from the storage hardware complexity.
Solution Approach 2:
The storage management system provides self-service capabilities by automatically handling object versioning, replication, and data management without requiring manual intervention. The system monitors and manages its own state, performing necessary operations to maintain data reliability while shielding users from the underlying complexity. This automated self-service approach maintains high reliability while managing complexity internally.
3Productivity
If storage systems use standard RAM for buffering write operations, then write performance improves, but data loss occurs during power failures
Solution Approach 1:
The patent applies preliminary action by using NVRAM to buffer write operations before they are permanently committed to the storage drive. This buffer is populated in advance during normal operation, and its contents are automatically flushed to persistent storage when power is restored after a failure. This preliminary buffering action allows for high write performance during operation while ensuring data safety through automatic persistence on power restoration.
Solution Approach 2:
The patent implements beforehand cushioning by using NVRAM as a protective buffer between write operations and persistent storage. This cushion absorbs the impact of power failures by preserving data in the NVRAM buffer during outages and automatically flushing to storage when power returns. The cushioning mechanism protects against data loss while maintaining high write performance during normal operation.
4Reliability
If storage systems implement proactive data rebuilding and redundancy mechanisms, then data availability improves, but write operations become more complex
Solution Approach 1:
The storage management system provides self-service by automatically monitoring storage node health and performing proactive data rebuilding without intervention. The system detects failures and initiates redundancy operations autonomously, maintaining data availability while shielding write operations from the complexity of these management tasks. Write operations remain simple client-side operations while the system handles redundancy internally.
Data Source
AI summary
A method of operating an object-based storage system, practiced by the storage system, is provided. The method includes establishing a plurality of buckets for objects, in the storage system and establishing a plurality of bucket views in the storage system, each bucket view supporting access to objects of one of the plurality of buckets. The method includes accessing an object of a bucket through one of the plurality of bucket views.