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    # 道法術器:高效企業的 DevOps 實踐地圖 - 张乐 {%hackmd B44mr9JvRMSCm5gVjQMNXA %} #### 企業如何提升軟件研發效能? 1. 設定全局化目標 - Deliver High Quality Working Software Faster 2. 引入體系化的方法 3. 採用被證明有效的解決方案 4. 獲得可持續性、有效果的改進 #### 阿里巴巴的效能指標定義(案例) 2 weeks 交付週期 (最重要的) 1 week 開發週期 1 hour 發布前置時間 ### 引入體系化的方法 鳥飛派 vs 空氣動力學 > 萊特兄弟發行飛行器 > 商業航空 > 從原理出發,而不是模仿 #### DevOps實施的三步工作法 ##### 流動 用戶價值在整個體系中的流動速度 ##### 反饋 越早反饋,越早發現並解決問題,成本越低 ##### 持續學習與反饋 《MySQL 從刪庫到跑路》 順豐的工程師誤刪資料庫,然後被fire了 Gitlab的工程師誤刪資料庫,後續持續的反省並修訂工作方法,然後被處罰要看10個小時的無聊動畫彩虹貓 ### 採用被證明有效的解決方案 DORA Accerelate: State of DevOps #### 重量級變更管理流程 案例故事:英國多佛爾角的哨兵 > 以前留下的流程(但現在已經不需要了)因為沒有想到要去改變而持續遺留。 #### 輕量級、清晰的變更管理流程 即使是很嚴謹的銀行業,也能透過"隔離"、"變更"的方式來逐漸讓測試變更左移 > 核心業務仍保持原樣,但非核心業務可以開始採用輕量級變更管理 #### 代碼可維護性 > The only valid measurement of code Quality: WTFs/minutes >代碼評審(code review)要佔工作時程(而不是加班做) Google, Facebook 對 code review 的要求: 1. 設計 2. 功能 3. 複雜性 4. 測試 5. 命名 6. 注釋 ... #### 自動化測試:微軟測試左移實踐 (案例) 從黑盒測試、UI測試比例較多的情況,逐漸變成Unit Test比例大幅升高 #### 監控和實驗 - 微軟A/B 測試案例 #### 你所在企業的核心競爭力是什麼? 如果你是農場主人,鵝 vs 鵝蛋,哪個才是你的財富? #### 有用、易用的工具 Facebook研發的原則之一:不要阻塞開發人員工作,讓開發專注編寫代碼,不受到其他干擾 #### 獲得可持續性、有效過的改進 one size fits all(X) vs made to measure(O) > 選擇最適合你的方法,找到瓶頸,並找到解決方法,如果做了沒效果,怎麼辦?不用擔心,因為解決點到點的問題,不會只有一個瓶頸點。 > 找到你的痛點,找到解決方式,找到你要去哪裡? ###### tags: `DevOpsDays Taipei 2019`

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