摘要
针对当前拟态表决器以连接为单位“连接内数据传输结束后再表决、转发”的机制难以适应HTTP 1.1协议在持久性连接、分块传输编码的应用场景中开销过大的问题,设计实现了面向持久性连接的自适应拟态表决器,在数据持续传输过程中滑动窗口式表决、释放异构冗余执行体的分块传输编码报文,通过分析滑动窗口式表决的分块传输编码报文的数据特征,构建了表决算法选择策略集,给出了表决准确性维护方案;提出了基于存贮模型的自适应表决窗口控制策略,为待表决数据提供最佳的切分方案。基于原型系统的实验结果表明,自适应拟态表决器在具有可接受的表决准确度下,降低了内存开销并提升了拟态表决效率。
Aiming at the problem that the current mimic voting usually adopts the mechanism of voting and forwarding after collecting all the transmission data in the connection,which has heavy overhead the application scenarios of the HTTP 1.1 protocol with the form of the persistent connection and the chunked transfer encoding,an adaptive mimic voting device was designed and implemented,where the chunked transfer encoded packets from heterogeneous redundant executives were voted and then released in the order as a sliding window during the voting device receives packets in the persist connections.By analyzing the characteristics of the chunked transfer encoded packets of the sliding window voting,a voting algorithm selection strategy set was constructed to maintain the voting accuracy,and an adaptive voting window control strategy based on the inventory model was proposed to provide the best segmentation scheme for the chunked transfer encoded packets to be voted.The experimental results based on the prototype system show that the adaptive mimic voting device reduces the memory overhead and improves the mimic voting efficiency with acceptable voting accuracy.
作者
周大成
陈鸿昶
程国振
何威振
商珂
扈红超
ZHOU Dacheng;CHEN Hongchang;CHENG Guozhen;HE Weizhen;SHANG Ke;HU Hongchao(Institute of Information Technology,Information Engineering University,Zhengzhou 450001,China)
出处
《通信学报》
EI
CSCD
北大核心
2022年第6期71-84,共14页
Journal on Communications
基金
国家自然科学基金资助项目(No.62072467)
国家重点研发计划基金资助项目(No.2021YFB1006200,No.2021YFB1006201)。
