Unified VHBA Buffer Pool for InfiniBand and FC
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Solution Overview
Problem
Traditional network and storage architectures in cloud computing environments face performance and administrative bottlenecks, particularly in handling input/output (I/O) operations, which hinder efficient I/O virtualization and lead to inefficiencies in managing multiple memory interfaces and handling ingress traffic.
Innovation Solution
The implementation of a system that supports I/O virtualization using a single memory interface, which includes a free buffer pool with a hybrid linked list structure, allowing for efficient storage and management of disk read data across multiple virtual host bus adaptors (vHBAs) and avoiding head-of-line blocking, by using a single chip and memory interface instead of separate ones for InfiniBand (IB) and Fiber Channel (FC) domains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple memory interfaces are used for separate InfiniBand and Fiber Channel domains, then I/O operations can be handled independently, but device complexity and cost increase
Solution Approach 1:
The patent combines separate InfiniBand and Fiber Channel memory interfaces into a single shared memory interface. The buffer pool is implemented as a unified structure that can be accessed by both I/O domains, eliminating the need for separate memory interfaces while maintaining independent I/O operation capabilities through logical separation of buffer management
Solution Approach 2:
The single memory interface is designed to serve multiple I/O domains (both InfiniBand and Fiber Channel) simultaneously. The buffer pool structure is made universal by implementing linked list mechanisms that can dynamically allocate and manage buffers for different I/O protocols through a common interface, reducing overall system complexity
2Ease of manufacture
If separate memory interfaces are used for each I/O domain, then data management is simplified, but data redundancy increases
Solution Approach 1:
The patent merges separate data management structures into a unified buffer pool that serves both InfiniBand and Fiber Channel domains. By implementing a shared memory space with protocol-agnostic buffer management, the system eliminates redundant data storage while maintaining simplified management through centralized control mechanisms
Solution Approach 2:
Instead of maintaining separate physical copies of buffer management structures for each I/O domain, the patent uses a single shared buffer pool where data is stored once and accessed by multiple domains through virtual addressing and linked list references, eliminating redundancy while preserving management simplicity
3Stability of the object's composition
If traditional network and storage architectures are used, then system stability is maintained, but performance bottlenecks occur
Solution Approach 1:
The patent introduces dynamic buffer management mechanisms that adapt to varying I/O workloads. The linked list structure allows flexible allocation and deallocation of buffers based on real-time demands from different I/O domains, enabling the system to maintain stability while achieving high performance through dynamic resource adjustment rather than static architecture
Solution Approach 2:
The patent segments the buffer pool into logically independent regions managed by separate linked lists for different I/O domains. This segmentation allows each domain to operate independently (maintaining stability) while sharing the same physical memory resources (improving performance), resolving the contradiction between stability and productivity
4Adaptability or versatility
If multiple linked lists are used for buffer management, then buffer allocation flexibility increases, but memory overhead increases
Solution Approach 1:
The patent combines multiple separate linked lists into a unified buffer pool structure where a single linked list manages all available buffers. This consolidation reduces memory overhead by eliminating redundant list structure elements while maintaining allocation flexibility through protocol-specific buffer selection logic that operates within the unified structure
Data Source
AI summary
A system and method can support input/output (I/O) virtualization in a computing environment. The system comprise a free buffer pool that contains a plurality of packet buffers associated with one or more virtual host bus adaptors (vHBAs), wherein each said vHBA maintains a main linked list of buffer pointers that point to one or more packet buffers. Furthermore, a context table can be defined on an on-chip memory associated with an input/output (I/O) device, wherein the context table maintains a temporary linked list of buffer pointers that point to one or more packet buffers allocated for a disk read operation. The I/O device can open the context table when the I/O device receives disk read data from a physical host bus adaptor (HBA), update the temporary linked list of buffer pointers, and merge the temporary linked list into the main linked list when the context table is closed.