SCM and Performance - NY Web Performance Meetup

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A discussion of the relationship between Software Configuration Management and Performance.

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SCM and Performance - NY Web Performance Meetup

  1. 1. SOFTWARE CONFIGURATION MANAGEMENT & PERFORMANCE GUY FERRAIOLO NY WEB PERFORMANCE MEETUP, 2/22/2010, NY, NY COPYRIGHT 2010 some rights reserved This work is licensed under the Creative Commons Attribution-No Derivative Works 3.0 License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nd/3.0/ or send a letter to Creative Commons, 171 Second Street, Suite 300, San Francisco, California, 94105, US
  2. 2. TOPICS OF THIS TALK BACKGROUND, DEFINITIONS, DESCRIPTIONS OF SCM GOOD THINGS SCM PROVIDES FOR PERFORMANCE ENGINEERS SOME ASPECTS OF A GOOD SCM METHODOLOGY
  3. 3. SOFTWARE CONFIGURATION MANAGEMENT USUALLY CALLED SCM IMPORTANT FOR MANY REASONS NOT RELATED TO PERFORMANCE OFTEN NEGLECTED FREQUENTLY REINVENTED
  4. 4. DEFINITION OF SCM In software engineering, software configuration management (SCM) is the task of tracking and controlling changes in the software. Configuration management practices include revision control and the establishment of baselines. [ http:// en.wikipedia.org/wiki/Software_configuration_management]
  5. 5. A MORE ECCENTRIC DEFINITION A FORM OF FUNCTIONAL PROGRAMMING THE DATA OPERATED ON IS CODE THE PRIMARY OUTPUTS ARE TRANSFORMED CODE, EXECUTABLES AND SCRIPTS
  6. 6. SCM ACTIVITIES MANAGE CODE REPOSITORIES BUILD SPECIFIC VERSIONS OF SOFTWARE RECORD WHAT WAS BUILT, WHEN, WHY AND BY WHOM MANUFACTURE, DISTRIBUTE AND INSTALL SOFTWARE
  7. 7. MORE SPECIFIC SCM ACTIVITIES RELATED TO PERFORMANCE (#1) AUTOMATE DEPLOYMENT OF MONITORING TOOLS
  8. 8. MORE SPECIFIC SCM ACTIVITIES RELATED TO PERFORMANCE (#2) CORRELATE MONITORING WITH DEPLOYMENT
  9. 9. MORE SPECIFIC SCM ACTIVITIES RELATED TO PERFORMANCE (#3) DEPLOY WITH A HIGH DEGREE OF UNIFORMITY
  10. 10. MORE SPECIFIC SCM ACTIVITIES RELATED TO PERFORMANCE (#4) UNDO!
  11. 11. MORE SPECIFIC SCM ACTIVITIES RELATED TO PERFORMANCE (#5) CONTROL URL-BASED CACHING
  12. 12. MORE SPECIFIC SCM ACTIVITIES RELATED TO PERFORMANCE (#6) DEPLOY FOR SPECIFIC PURPOSES DEVELOPMENT PERFORMANCE TESTING A/B TESTING
  13. 13. MORE SPECIFIC SCM ACTIVITIES RELATED TO PERFORMANCE (#7) TRACK PROBLEMS BY MODULE BY DEVELOPER
  14. 14. WHAT DO WE WANT FROM OUT SCM METHODOLOGY HIGHLY AUTOMATED REVERSIBLE SELF-DOCUMENTING SIMPLE WORKFLOW
  15. 15. THINGS THAT MAKE AN SCM PROCESS WEAK (#1) NOT INTEGRATED • MONITORING AND DEPLOYMENT ARE COMPLETELY DISTINCT PROCESSES MANUAL MAGIC IN THE MIDDLE OF THE PROCESS • HIGHLY AUTOMATED UNTIL A MANUAL STEP REQUIRING HIDDEN KNOWLEDGE IS DONE BY A SMALL SET OF PEOPLE FAILS TO RECORD KEY INFORMATION OR PRESENTS IT IN SUCH VOLUME THAT IT CAN’T BE EASILY ANALYZED
  16. 16. THINGS THAT MAKE AN SCM PROCESS WEAK (#2) ALLOWING PRIVILEGED PEOPLE TO BREAK RULES USING TOOLS THAT CAN’T PROVIDE KEY FUNCTIONALITY
  17. 17. POSITIVE STEPS TO GOOD SCM NEEDS SUPPORT OF MANAGEMENT AND KEY DEVELOPERS NEEDS TO BE USED ON A REGULAR BASIS NEEDS TO REPORT UNDERSTANDABLY AND REGULARLY
  18. 18. TOOLS AND TECHNIQUES (#1) MAKE DECISIONS EXPLICITLY TAKE ACTION AUTOMATICALLY
  19. 19. TOOLS AND TECHNIQUES (#2) I DISLIKE RPM AS A DEPLOYMENT TOOL, TRY SOMETHING ELSE MAKE IS GOOD, I HAVE NOT WORKED WITH ANT VIEWPATHING IS A VERY POWERFUL TECHNIQUE, LATER GENERATION NMAKE HAS IT
  20. 20. TOOLS AND TECHNIQUES (#3) SUBVERSION IS ACCEPTABLE, IT’S GLOBAL NUMBERING SCHEME HIDES SOME USEFUL INFORMATION INVESTIGATING S-LISTS AS A CONCEPTUAL MODEL IS VERY USEFUL
  21. 21. RECAP SCM IS VALUABLE IN GENERAL SCM HAS DIRECT AND SIGNIFICANT IMPACT ON PERFORMANCE ENGINEERING THERE IS A LARGE BODY OF WORK THAT CAN BE MINED TO IMPROVE ANY SCM PROCESS RESULTS ARE (SOMEWHAT) PROPORTIONAL TO EFFORT
  22. 22. THANKS TO WEB PERFORMANCE MEETUP LOGICWORKS SERGEY CHERNYSHEV
  23. 23. THANKS FOR LISTENING! CONTACT ME IF YOU WANT TO TALK ABOUT THIS SUBJECT
  24. 24. CONTACT INFORMATION GUY FERRAIOLO GDF@NORSTRILIASOFTWARE.COM
  25. 25. DEFINITION OF SCM: HTTP://EN.WIKIPEDIA.ORG/WIKI/SOFTWARE_CONFIGURATION_MANAGEMENT CONTAINS A FAIRLY DETAILED EXPLANATION OF VIEWPATHING: HTTP://WWW2.RESEARCH.ATT.COM/~GSF/NMAKE/NMAKE.HTML

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