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    # How to survive in the 1111 - 陳道陞 (Tao-Sheng) ###### tags: `2023` {%hackmd @sre-conf/H1pCafrG3 %} ### Key elements - Estimation for the worst/best? - Money talks but can't buy everything - Alignment with Business(know the traffic behavior) - Auto-Scale 還是事後指標 仍會造成slow response ### Estimation - Planning for the target and estimation on the resources 活動內容(99% cash back) 流量來源(裝置是手機還是瀏覽器,信件連結? Infra or SRE 把需求轉成所需的資源準備,是每次的挑戰 ### Load testing Simulation in Production env (仿真測試,因為在驗證環境可能無法真的反應出狀況,或是正式環境的資料也不可能搬移到驗證環境) - Avoid resource leaking - Gain confidence - Pick right timing (4am) 有些日常排程,重要性相對低,在負載高時,可以先捨棄不跑 ### Planning - Plan ahead of the time - D-Day plan - Worst case plan - On-duty schedule - Technically readiness - No silver bullet - public cloud is good...but - k8s is good...but(需要reserve node,這樣要長pod 也需要有Node,不然會卡在EC2的時間) 雙11會需要開 spot instance 可能性很低,因為大家都要擴容 所以得前兩天先將 spot instance 改成 reversed instance ㄎ ### D-Day - On-Duty - Process - Leadership --- ====== 聊天區 ====== 本來想嘗試寫什麼 不過後來想想還是算了 -> 我光看標題還以為是1111的人來講,結果是shopback,剛剛還在想說怎麼找不到筆記XD ![](https://memeprod.sgp1.digitaloceanspaces.com/meme/46b9568828d8ae7d5fd00c2c9305127f.png) 剛開始聲音太小了哈哈 看標題本來以為是在1111的工作經驗,結果原來是1111流量存活,好像可以期待 真的 同意 對!我也以為是 好像短延時強降雨的圖ㄎㄎ XD 可是shopback有需要及時處理嗎? 優惠審核大概會超過一個月(之前的使用印象 -> ~~自信點,把大概去掉~~,我自己就有一拖拉庫,零零總總加起來差不多要等超過一年ㄌ 這什麼水文發言,我PTSD了 大氣版看太多ㄎㄎ 有需要吧 朋友在那邊 1111 都要先試跑 可是 Shopback 主要是 Chrome 擴充套件,拿來蒐集使用者資訊 應該可以用非同步,設計成 Queue 處理吧? 做為第三方服務,需要跟電商串接資料,所以還是需要即時處理吧? 後續資料處理應該就可以緩衝了 個人淺見,要做即時的部分應該是跟電商串接,後續的點數回饋可以用非同步 只需要確保該次消費有被驅動回饋事件應該就OK 對欸Shopback有App 聽起來需要進後端交涉 K8S 是事後成長,不是事前成長 所以我們要預判使用者的預判 這樣才可以應付大流量嗎??? 事前成長應該本來就只能用預判的吧XD 就跟張惠妹演唱會,飯店先把房價漲起來一樣 還有BP啊!賣一堆假票 GAN 太賤惹 > 之前聽 KKTIX 賣票,也是搶票前先把機器開好 > 我朋友公司也是有搶購機制的,也都是預先開好 還好不是分享 ANA Bug 票 不然我會懷疑講者前幾天才做好投影片 !! 完全沒發摟到這個新聞 Load test為什麼不建立staging環境要在production測試呢?如果生產環境24小時都在使用,應該不能這樣搞吧XD 成本&資料? 上面共筆有稍微記錄到 -> 所以才要在離峰時間 正式...環境...壓測...

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