關於 system monitoring software ，我們在網路上蒐集到這些相關的討論、資訊與評價

輪胎大廠普利司通（Bridgestone）和軟體業巨擘微軟（Microsoft），傾力針對輪胎安全進行技術合作，合力推出全球第一套，能夠即時回報輪胎毀損資訊的TDMS（Tyre Damage Monitoring System）輪胎損傷監控系統。
Bridgestone and software giant Microsoft have worked together to launch the world's first set of tdms (Tyre Damage Monitoring System) tire damage Surveillance System.Translated

因為看到這一篇文，讓我想要請教我很佩服，也曾經待過 LinkedIn 的實戰強者 Ian Tsai
，他的洞見與補充，真的是滿滿的功力跟學問。

經過他同意之後，想分享給更多人一起學習交流。相信可以對很多強者、想變強的強者、老闆、技術管理者帶來一些 AHA 與幫助。

原討論串：https://www.facebook.com/1069344389/posts/10220464611619871/?d=n

原討論串的文章：https://mp.weixin.qq.com/s/NhES8FHIhyfCxaPiM508EQ

—
以下來自 Ian:

1)
這篇文章的核心前提，是『重寫』

只有一開始就把很多東西做好，相對獨立且沒有過去包袱的專案才能這樣搞出十倍速，比如Voyager Mobile App

其他division 的產品與系統，有太多跟舊系統交雜在一起而動不了的，就不可能達到他講的3X3，因為有需要在那些系統上開發，就是會很慢

然後他還有一個假設就是做這個專案的從頭都是某個人做中間不換人，LinkedIn的平均工程師年資就是2.5年，所以，他在專案開始啟動的那兩年可能是可以的，兩年之後就很難說了，因為新加入的人也不可能可以這麼快入手，起碼以我觀察LinkedIn內部做Knowledge transfer 就是沒那麼快(但LinkedIn 可能是算快的)

針對這一點，現在需要搞軟體開發的公司，都應該要有一個Tools Team，而這個team 其中一項最重要的業務，就是開發維護一套公司內部使用的KMS系統，而這套系統的核心必定是一個Omni Search Engine，能夠跨越多個異質CMS 平台、EMail、IM、VCS 把所有的自然語言與程式語言的內容都能集成在搜尋結果(Google search result + web IDE)中呈現，沒有這個，只靠現成的外部工具提供的功能，找來的人平均會需要至少兩到三倍的時間才能進入情況(LinkedIn 有這個，超好用！)

最後一個需要的是高度客製化的CI系統，這種平台的CI系統不能有太多人為介入得要全自動，整個流水線過程中發生的任何錯誤，都能在第一時間全自動的通知『真正的負責人』，包含log、request context, call tree graph都提供，才能讓開發人員不會害怕系統出錯，而不必在開發階段搞很多很複雜的E2E Test

至於測試，這段老實說就是設計架構切割是不是有真的切在對的邊界上，一旦切錯，測試不是很難寫就是寫一堆沒用的，而且我在LinkedIn後期，還是有產品線為了衝Craftsmanship 指標搞出要求工程師 code coverage 90%的要求

我覺得對於backend，真正重要的是distributed Log management system，還有像是Datadog 這樣快速方便的 System Monitoring 服務，在寫程式的時候把這些一開始就根據業務邏輯規劃進去，然後確保觀察得到的與預測符合，這些在現在都比拼測試重要，因為Microservices 之後，對於很上游的Upstream 服務，要對每個Downstream Service 一開始就搞出範圍適當的defensive programming 是很麻煩的

這其實也是一個後端架構上的硬需求，也就是每一個Module 在software stack 上 ，對於他使用的任何Downstream Service 怎麼做Async + Failover + Timeout + Circuit Breaker + Monitoring & Instrumentation + Graceful Degradation + Logging & Alerting ... 都要有方案且預先做出來，不然想要App backend developer 在後端一邊搞Home Made solution 一邊還要拼出3X3 的效率也是不可能的。

2)
其實好的產品開發工程團隊，一定要持續規劃有人去conclude 系統中的共通需求，透過共識討論找到合適的解決方案，然後也一定要有農閒期，好讓這種共識得出的艱難改造有喘息的機會上線

這個佔總體開發量大概至少得要15% ~ 20%，也就是團隊如果有10個專職開發者，那至少要有一個名額(不同專長的人輪流)負責幫大家把刀磨利、把工具保養好

不然熵會把系統吃掉的。

Joey: 完全認同，全局優化，避免重工、多頭馬車、穀倉、無法相容異質系統的影響，永遠都在熵的影響下消耗掉所有產能。

就是那個「壯士斷腕」的決心，要把有能力的人拉出來搞全局的、長期的健壯性，很多公司跨不過去，除非已經有一個起家厝在養家了。

Ian:
問題就是方形的車輪滾不遠，做產品的團隊經營超過一年後還沒有建立閒置產能，那第二年就會在不同的專業領域接連出現技術落伍的現象，而好的工程師都是很敏感的，當老闆持續消耗自己的職業壽命賺錢或求生的時候，他自然會考慮繼續待著機會成本是否划算

這種考慮講個幾次，越是有野心、有衝勁、early adopter 類型的人才就會越早流失，而這是最糟糕的，因為這種人才是幫助公司導入新技術、保持團隊知識領先的關鍵火星塞，所以這種人被天擇掉了之後，剩下來的人不論在價值觀、還是行為慣性上都會更保守、更抗拒變化

這一但超過一個閥值(或者說事件地平線)就不可能回來，這間公司不論當時訂單多少、市場再大都要走入平庸了

當然，如果他家大業大而且上層還能持續透過併購招募新血，那或許還能透過慣性再小衝一段，但都是減緩衰退續命而已。

麻煩大家幫忙
留下優秀的一家人

他們來自波多黎各
父母親都是名校約翰霍普金大學的電腦碩士
(Master Degree in Computer Science - Johns Hopkins University at Laurel, MD)
他們著五個孩子，到全世界學習
Diego 17歲 Paula 13 歲 Alonzo 12 歲
Felizi 8 歲 Matteo 6 歲

八月，他們到了台灣
發覺這是一個非常適合的生活環境
有好的醫療、中文學習環境、電腦產業、和超好吃的水果
九月，Diego , Paula, Alonzo進入惠文高中寄讀
他們來了之後，學校形成一個很棒的英語學習情境
台灣學生都被迫用英文跟他們互動

星期五與台北歌德學院簽訂德國「PASCH夥伴學校」時
他們三個和學校弦樂社一起合奏卡農(見影片)
非常非常有教養的一家人

然而他們11月就必須離開台灣
因為他們來台灣的第五天
得到美國總公司的通知
他們收掉波多黎各的公司
爸爸Tommy失業了
所以這幾天，他在台中接一個英文家教
但經濟仍是問題

如果台中的朋友可以提供11月4日前的短期英文、西班牙文家教工作
或是提供長期電腦工程師的工作
麻煩和Tommy聯絡
以下是他的聯絡方式及完整資歷
(願意幫他們申請工作簽證更好)
他們很願意把台灣當成第二個家

PS
覺得政府說要把英文變成第二語言
最棒的方式是吸引國外的學生進入我們的校園
在人才即國力的年代
讓優秀的國際人才留在台灣
如果在台灣就有很好的英語學習環境
我們就不用一窩蜂跑到國外

聯絡TOMMY IRIZARRY-SIKES
Contact Information
Postal: Lane 400, Unit 11, Section 2, Nantun Road, Nantun District, Taichung City, Taiwan 408
Email: tirizar@gmail.com
Phone number: 0908 979 417
LinkedIn Profile: http://pr.linkedin.com/pub/tommy-irizarry/25/16/815

孩子的影片
Diego violin in a quartet:
https://youtu.be/ArkvU8Czmk8?t=37s

Diego violin Doble de Bach:
https://youtu.be/LYvnKwEueyA

Diego plays piano Clair de Lune:
https://youtu.be/CWCQMo5XJEY?t=14s

You can see some other videos in this YouTube channel:
https://www.youtube.com/user/tirizar/videos?reload=9

履歷
Summary of qualifications
Software developer for private industries and government agencies. Proficient web developer using classic ASP code, standard html, CSS and SQL Server for data storage. Web server administrator and SharePoint Power User.
 Android developer
 Certified Ethical Hacker
 Programming / Markup languages: HTML, XML, ASP, PHP, CSS, JavaScript/AJAX/JQuery, experience with Java, C++ and C.
 Mobile development: Java, Android, Android Studio.
 Technologies / Tools: IIS 6.0/7.5, SQL Server, Dreamweaver, Fireworks, Microsoft SharePoint 2007/2010, Microsoft Office suite including InfoPath, Access, Excel, Google Analytics, Google AdSense, Facebook Advertising, Microsoft SharePoint Designer, Inquisite Surveys.
Experience
Since November 2016-current
Enterprise Iron
Principal consultant – Web Developer
 Worked on the redesign efforts of the secure site for an international financial client. Applied responsive design principles using the Bootstrap framework while creating modular, reusable components of the code. Analyzed web page dependencies and identified legacy unused pages in the system.
Since November 2015-current
e-Nabler Corporation
Android developer – Professional Services Contract
 Developed Java code for the eMobilePOS and Tupyx apps for their Android versions.

Since October 2013-November 2014 TEK Systems
Web Developer / Web Master for the Department of Veterans Affairs in DC
 Continued supporting Veteran’s Affairs IT systems, including managing SharePoint 2010 systems and supporting databases. We identified issues with several databases including the management of IIS and SharePoint logs which were consuming many recourses and in a couple of occasions made the systems unavailable.
 Enabled and configured space monitoring tools in the SharePoint server farms.
Since November 2011-September 2013 Centuria Corporation
Web Developer / Web Master for the Department of Veterans Affairs in DC
 Developed a training registration web site that has been tweaked and used multiple times for different registration purposes, including new telephone system training, and scheduling software upgrades of encryption on laptops and upgrades to Apple Mac OS. The system uses a web front end and a SQL back end.
 Performed a routine web server maintenance tasks including monitoring traffic logs, identifying and archiving sites no longer in use, evaluating tools to assist in the management of the web server.
 Administered and migrated the FTP server from Windows 2003 Server / IIS 6 into Windows 2008 R2 Server / IIS 7.5. Configured new sites to support general operations within the VA Intranet.
 Maintained and enhanced legacy sites, modifying forms and reports in needs to be updated. This includes modification and creation of site in the Enterprise Content Management System used at the VA.
 Assisted other team members in various tasks including the creating or modification of surveys in the Inquisite system, and also the migration of some surveys into SharePoint, the modification of an Access application.
December 2001 – August 2011
Systems & System Software Solutions
Web Developer / Web Master for the Department of Veterans Affairs in DC
 Mr. Irizarry developed a web based application for the State Home Per Diem Office, which manages millions of dollars in payments to the state homes, to replace an Access database. The Access database was converted to MS SQL Server database and all data was migrated successfully. He created a web based interface using the standard VA intranet look and feel. He also developed a custom interface for each of the 3 roles (CBO, VAMC and VISN). Tools were built for the administrator to view current reports, view missing reports lists, and configure many parameters in the application. The VAMC report form was heavily automated using jQuery to perform auto calculations, increasing data validation and saving time to the users. After the application was launched users commented frequently about how user friendly is the new interface and about the time savings. Tasks that will take 2 hours to be completed now take 15 minutes. We have close to 12,000 reports in the system.
 There were various requests to the IT office for a web based training registration system of different types. Mr. Irizarry developed a registration system which was later used for the following projects: Take your child to work day, New Telephone system training registration, Laptop Hard Drive encryption software upgrade among others.
 Developed an alternate cascading style sheet for SharePoint 2007, converting the out of the box look and feel to the Department of Veterans Affairs standard website look and feel.
 After one of the VA’s laptops was stolen Mr. Irizarry worked to develop a Risk Assessment web based application. He created an Excel template which management will upload to an FTP server with information and details about remote employee access and the sensibility of the data accessed by those users. He also created VB Scripts to validate those Excel files an upload that information into an MS SQL database. Reports for upper management in Central Office were then created which prompted management to enforce stronger security measures, like hard drives encryption. In total more than 500,000 records were processed for the reports.
 Administration of IIS 6.0 web server and MS SQL Server databases used in our websites.
 Wrote migration scripts to move IIS 6.0 sites into a new IIS 7.5 server
 Designed, developed and maintained multi-tier applications for the Veterans Health Administration. Most of the sites access a MS-SQL Server database, use cascade style sheets and ASP server side processing. The sites were developed using Adobe/Macromedia tools like Fireworks, and Dreamweaver.
 Installed BlackBerry wireless email devices and trained users on the basic device usage.
 Web developer for the Department of Veterans Affairs. Redesigned and modified web pages to make them compliant with the Section 508 guidelines. Tested validation tools that verify if web pages are “Section 508” compliant. Section 508 are guidelines that must be followed by all government agencies and points to which government resources must be make accessible to people with disabilities, i.e. blind, deaf, etc.

November 1999 - December 2001
Compaq Computer Corporation
Consulting Associate II
 Design and develop the XOOB (Xevo out of the box) Web user interface. XOOB uses COM+, ASP, XML, XSL and JavaScript to provide a web user interface to the Xevo Workbench Platform based on the role associated with the user. Development was done using Visual Studio tools, IIS and XMLSpy.
 Develop Active Server Pages for the Helpdesk solution for the PrimusASP project.
 Design and code an ActiveX component that serves as the bridge between the Compaq ASP Framework and the Infranet billing system for Primus. Supported integration with other components of our framework.
 Design, code and troubleshoot software for the Primus ASP (Application Service Provider) project. Software includes a DLL and various VB programs that run as NT Services, which are key components of the Compaq ASP framework.
June 1998 – October 1999
National Security Agency
Computer Scientist
 Mr. Irizarry worked for as a software developer for the TOKENEER project. TOKENEER is a test platform for the integration of smart cards, biometrics (fingerprint, hand, iris and facial recognition) and a public key infrastructure. Development was done on Windows NT workstations using Visual C++ and Visual SourceSafe for source control. Mr. Irizarry used an SDK to capture and match fingerprints against a database of fingerprints. He also created software to created some statistics of “False Accepts and False Reject Rates” of the fingerprint. He also worked with other team members to identify which fingerprints characteristics could affect those rates. He then added error detection functions to the fingerprint recognition software to identify corrupted files of fingerprint images
 Conducted research for methods to add security services to an off-the-shelf computer.
 Developed C code to process fax data on an UltraSparc/SunOS station.
 Wrote software to generate a daily report of traffic load in a telephone switch by analyzing the switch logs.
Education
Certifications:
 Certified Ethical Hacker – 03/28/2014
Master Degree in Computer Science - May, 2001 Johns Hopkin

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SATA3
Serial ATA (SATA)
Serial AT Attachment
SATA revision 3.0 (6 Gbit/s, 600 MB/s, Serial ATA-600)


Capacity : 240GB
Dimensions : 100.0 x 69.9 x 7.0mm
Weight : 63g (max.)
Controller : Phison
NAND Flash : TLC
Interface : SATA III

Performance Read(max.)
ATTO : 240GB - 560MB/s
CDM : 240GB - 460MB/s

Performance Write(max.)
ATTO : 240GB - 530MB/s
CDM : 240GB - 430MB/s

MTBF : 1,500,000 hours
Operation Voltage : 5V
Vibration Resistance Test : 20G
Shock Resistance Test : 1500G Max

Features
- Adopts TLC NAND flash and "SLC Cache Technology" to improve overall performance
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- 7mm slim design suitable for ultrabooks and ultra-slim laptops
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