Network Interface Controller Offloading for Distributed Storage Redundancy
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Solution Overview
Problem
Distributed data storage systems face inefficiencies in CPU offloading during redundancy calculations and data transfers, which can lead to high hardware complexity and communication overhead, especially in redundant array of independent disks (RAID) systems.
Innovation Solution
The implementation of network interface controllers (NICs) with computation logic and cache memory to offload CPU tasks, performing redundancy calculations and data transfers, thereby reducing the burden on CPUs and eliminating the need for a RAID controller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If CPU performs redundancy calculations and data transfers in distributed storage systems, then calculation accuracy and data integrity are ensured, but CPU utilization increases and system efficiency decreases
Solution Approach 1:
The patent extracts the redundancy calculation function from the CPU by introducing a dedicated NIC with computation logic. The NIC independently performs redundancy calculations and data transfers, removing this workload from the CPU while ensuring data integrity through dedicated hardware implementation.
Solution Approach 2:
The NIC acts as an intermediary between the CPU and storage devices, handling redundancy calculations and data transfers. This intermediary component relieves the CPU of these tasks while maintaining system reliability through dedicated computation logic in the NIC.
2Productivity
If dedicated hardware is added for redundancy calculations, then calculation speed and efficiency improve, but hardware complexity increases
Solution Approach 1:
The NIC is designed with multi-functionality, serving both as a network interface for data transfers and as a computation unit for redundancy calculations. This universal component improves calculation speed without requiring separate dedicated hardware, thereby limiting the increase in hardware complexity.
Solution Approach 2:
The patent merges the redundancy calculation function with the existing NIC infrastructure. By combining computation logic with the network interface, the system achieves faster redundancy calculations while avoiding the hardware complexity increase that would result from completely separate dedicated hardware.
3Adaptability or versatility
If more computation logic is embedded in NICs, then CPU burden is reduced and system scalability improves, but NIC complexity and manufacturing cost increase
Solution Approach 1:
The NIC is pre-configured with computation logic that enables it to perform redundancy calculations independently before data is fully processed by the CPU. This preliminary action by the NIC reduces the CPU burden and improves system scalability, while the computation logic is integrated in a way that limits NIC complexity increases.
Data Source
AI summary
A network interface includes a host interface for communicating with a node, and circuitry which is configured to communicate with one or more other nodes over a communication network so as to carry out, jointly with one or more other nodes, a redundant storage operation that includes a redundancy calculation, including performing the redundancy calculation on behalf of the node.