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技术

并行核对

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This blip is not on the current edition of the Radar. If it was on one of the last few editions it is likely that it is still relevant. If the blip is older it might no longer be relevant and our assessment might be different today. Unfortunately, we simply don't have the bandwidth to continuously review blips from previous editions of the RadarUnderstand more
Published: Oct 28, 2020
Oct 2020
试验?

大规模替换遗留代码始终是一项艰巨的工作,而且经常受益于执行 并行核对(Parallel run with reconciliation) 。实际上,该技术依赖于通过旧代码和新代码执行相同的生产流程,从旧代码返回响应,比较结果从而对新代码产生信心。尽管这是一种古老的技术,但近年来,我们在持续交付实践(如金丝雀发布和特性切换)的基础上看到了更健壮的实现,并通过添加额外的实验和数据分析层来比较实时结果来扩展它们。我们甚至已经使用这种方法来比较跨功能的结果,例如响应时间。尽管我们已结合定制工具多次使用该技术,但我们还是要感谢 GitHub 的Scientist工具,该工具对应用程序的关键部分进行了现代化改造,现已移植到多种语言。