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Tag Archives: uber
Uber 戰火蔓延到 Unroll
最近 Uber 的 CEO 被 Tim Cook 叫去喝咖啡的事情被報導出來：「Uber’s C.E.O. Plays With Fire」，裡面提到了 Uber 試著要「辨別」使用者的 iPhone，而這違反蘋果的政策： To halt the activity, Uber engineers assigned a persistent identity to iPhones with a small piece of code, a practice called “fingerprinting.” Uber could then … Continue reading
LibreTaxi：Uber 的替代方案
應該是因為 #DeleteUber 的關係而冒到排行榜上的「LibreTaxi」(關於 #DeleteUber 的事情，可以參考「What You Need to Know About #DeleteUber」這邊的說明)。 看了官網的說明覺得還蠻特別的，看了 GitHub 上的 ro31337/libretaxi 說明才對於他運作方式稍微有感覺： 系統跑在 Firebase 上，用 Telegram 當溝通工具，用這樣的架構來建構系統... 然後專案從 2016 年四月開始做的。
看到 zmx 貼了之前的連結，更確信 Uber 的問題不是技術問題了...
在 Twitter 上看到 zmx 提了一個連結，講 Uber 年初時貼的「How We Built Uber Engineering’s Highest Query per Second Service Using Go」這篇文章的問題： TLDR; Uber：傳統方式太複雜了根據我們資料特性自創一套高效能的空間索引服務。前 Bing 員工：買了 Bing 怎麼不問專家啊？Quadtree 降兩個數量級啊，不然你們自創的做了這個小修改也是降兩個數量級啊！https://t.co/nHw1DgmYtU — Bill Zhong (@zmx) August 2, 2016 對照最近的事情還蠻有趣的，尤其是這篇文章後面提到的，酸～爆～了～XDDD： It is clear to me that the … Continue reading
Posted in Computer, Murmuring, Network, Programming, Search Engine, Software
Tagged algorithm, data, database, db, map, mysql, postgresql, quadtree, structure, uber, zmx
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最近討論 Uber 的 MySQL 換 PostgreSQL 後又換回 MySQL 的文章...
先把兩份連結丟出來，一份是 PyPgDay 2013 時由 Uber 的 Evan Klitzke 給的「Migrating Uber from MySQL to PostgreSQL」，原 PDF 連結已經失效 (看起來已經被刪除)，但這個網路年代什麼都可以找到備份... 可以在「Migrating Uber from MySQL to PostgreSQL」取得，但這個網站怪怪的，我另外丟了一份到 Google Docs 上。 另外一份則是同一個人 Evan Klitzke 在 2016 年發表於公司的官方網站上：「Why Uber Engineering Switched from Postgres to MySQL」。 2013 … Continue reading
Posted in Computer, Database, Murmuring, MySQL, Network, Political, PostgreSQL, Software
Tagged clustered, database, db, index, migration, mysql, postgis, postgresql, pypgday, replication, uber
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Wal-Mart 與 Uber/Lyft 合作迎戰 Amazon
Amazon 透過各種技術整合的比較好 (像是先前發表無人機空運的技術 Amazon Prime Air)，而 Wal-Mart 則是跟 Uber/Lyft 這樣的公司配合：「Wal-Mart Plans to Test Grocery Delivery Through Uber, Lyft」。 不過可以看到運費不算低，如果買的東西不多的話： The move steps up competition with Amazon’s burgeoning grocery-delivery service and provides a potential new avenue of growth for Uber and … Continue reading
Uber 這類服務在北美的商務交通支出超越一般租車
從 Bloomberg 上看到的新聞，Uber 這類服務在北美的商務交通支出的佔有率已經超越一般租車了：「Uber Overtakes Rental Cars Among Business Travelers」。 資料來源是來自 Certify，北美第二大的雲端管理服務。所以這份資料其實還是有 bias 存在，但還是可以看出大趨勢： 所以不只有一般計程車行業受到影響，在商務客也受到衝擊。
Uber 在泰國曼谷提供 UberMOTO 服務：機車載客
Uber 在泰國曼谷推出 UberMOTO：「Uber launches its first motorcycle service」，官方的英文新聞稿：「Bangkok, UberMOTO is arriving now!」。 可以用現金或是信用卡付款： At the end of your trip, you can pay with either cash or credit, depending on what you chose before requesting the ride. You’ll also receive an … Continue reading
印度的 Uber 將會有「Panic Button」提供給乘客
在「Uber has a panic button in India. But don’t expect it to come to the U.S.」這邊看到印度的 Uber 將會有 Panic Button 給乘客使用，馬上想到這種按鈕 XDDD 不過實際讀了文章以及官方的說明「Uber Upgrades In-App Safety Features in India」後，發現是 app 裡面的緊急通報： 這應該是因應先前印度發生好幾起 Uber 司機犯罪事件所做的改變 (參考「India Uber driver guilty of rape」)。
安倍政權打算規範民宿，使得 Airbnb 變成非法
日本市場是 Airbnb 成長最快的市場 (參考「Airbnb to Boost Japan Listings, Its Fastest-Growing Market」)，也使得日本的旅館業者想透過立法手段打擊 Airbnb 這類服務：「Airbnb Faces Major Threat in Japan, Its Fastest-Growing Market」。 Under pressure from the hotel industry and a populace concerned with the surge of foreigners in their neighborhoods, Prime … Continue reading
舊金山最大的計程車行 Yellow Cab 打算申請破產
舊金山最大的計程車行 Yellow Cab 打算申請破產：「Yellow Cab to file for bankruptcy」： Martinez wrote that the co-op plans to file for bankruptcy in one month. The letter was dated Dec. 10, 2015. The Examiner learned of it after rumors about the bankruptcy began … Continue reading