Load Balancer Buffer Management via Dynamic Memory Stack Allocation
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Solution Overview
Problem
Load balancers face challenges in managing buffers efficiently, leading to a large memory footprint due to the need for maintaining empty buffers to handle bursts of traffic, which increases storage requirements and reduces performance.
Innovation Solution
Implementing a hardware-centric approach with a buffer cache and memory stack that allows the load balancer to directly manage receiving and transmitting queues, using a Last In, First Out (LIFO) structure to minimize memory usage and scale with traffic demands, eliminating the need for a receiving and transmitting core pair.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the load balancer maintains empty buffers to handle bursts of traffic, then the reliability is improved, but the memory footprint increases
Solution Approach 1:
The patent implements dynamic buffer management where the load balancer allocates and releases buffers based on real-time traffic conditions. Instead of maintaining static empty buffers, the system dynamically adjusts buffer allocation to match actual traffic demands, allowing buffers to be reused efficiently and reducing the overall memory footprint while maintaining the ability to handle traffic bursts.
Solution Approach 2:
The system changes the state of buffers from permanently empty to dynamically allocated based on traffic patterns. By monitoring traffic conditions and adjusting buffer allocation parameters, the load balancer optimizes memory usage while ensuring sufficient buffering capacity is available when needed, thus resolving the contradiction between reliability and memory footprint.
2Ease of operation
If the load balancer uses a traditional buffer management approach with receiving and transmitting core pair, then the buffer management capability is improved, but the device complexity increases
Solution Approach 1:
The patent merges the functions of receiving and transmitting core pairs into a single integrated buffer management mechanism. Instead of maintaining separate core pairs for receiving and transmitting operations, the load balancer implements a unified buffer management approach that handles both operations through consolidated logic, reducing structural complexity while preserving full buffer management capabilities.
Solution Approach 2:
The load balancer implements a universal buffer management system that performs multiple functions (receiving, transmitting, allocation, release) through a single integrated mechanism. This multi-functional approach eliminates the need for dedicated core pairs, simplifying the device structure while maintaining comprehensive buffer management capability across different operations.
3Productivity
If the load balancer allocates large buffers for queueing I/O data, then the productivity is improved, but the memory footprint increases
Solution Approach 1:
The patent implements a buffer recycling mechanism where buffers are released back to the pool after being used for I/O data queueing. Instead of permanently allocating large buffers, the system efficiently recovers and reuses buffers after their purpose is fulfilled, maintaining high productivity through adequate buffering while minimizing the total memory footprint through continuous buffer recovery and reuse.
Data Source
AI summary
Methods, apparatus, and computer programs are disclosed for buffer management in load balancing. In one embodiment, a method is disclosed to comprise providing a set of buffers by a storage of a load balancer to store packets to be distributed by the load balancer, and distributing the packets by the load balancer to a set of cores of a computer processor to be processed by the set of cores. The method further comprises responsive to buffer utilization in the storage over a first threshold, obtaining by circuitry of the load balancer, from top of a memory stack coupled to the storage, additional buffers to store the packets to be distributed and responsive to buffer utilization in the storage below a second threshold, returning by the circuitry of the load balancer, available buffers in the storage to the top of the memory stack.