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IDK0040 Võrgurakendused I Building a site: Implementation

IDK0040 Võrgurakendused I Building a site: Implementation. Deniss Kumlander. Implementation. From A to B. idea money content / users / services business/technical implementation splitter operating system (e.g., Windows XP or Unix) service-specific software

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IDK0040 Võrgurakendused I Building a site: Implementation

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  1. IDK0040 Võrgurakendused IBuilding a site: Implementation Deniss Kumlander

  2. Implementation

  3. From A to B • idea • money • content / users / services business/technical implementation splitter • operating system (e.g., Windows XP or Unix) • service-specific software • data management system (Database, files [flat] etc) • TCP/IP • Resources (processor, HDD, network)

  4. Using services remotely • Remote server is administrated by somebody else (read controlled) • You just download your site • Different levels of services: • Just HTML • +PHP or ASP • +DB • +performance

  5. Domain • www.ttu.ee/yourname or • www.yourname.eu / .com etc • Registrar + DNS address

  6. Control PC, use (restricted) network • You do whatever you want on software, installs etc. • You must administrate your site and monitor avoiding downtime. • ISP provider defines what ports are open. • Dynamic IP address? • http://www.dyndns.com

  7. Control PC, control network • + You can open/close/control ports, gateways, routers

  8. Hardware • Computer (number of users, connections, materials, applications) • Personal • Server • Mirrored disks (RAID) • Router (firewall, gateway) • UPS

  9. Software • Windows / UNIX • IIS / Apache • PHP / ASP • ORACLE / MS SQL Server / MySQL

  10. Network • Network channel • Upload “Bandwidth is cheap and getting rapidly cheaper, notably because of cable modems. Don't make too many decisions based on the assumption that users will be connecting at 56K”http://philip.greenspun.com/panda/server • Download • Limits • Internal network

  11. Conclusion • Decide what you are going to concentrate on • How you do that • What will you need

  12. Realisation

  13. Development cycle steps • Build a data model • Define activities / functions to be used to produce, get, report etc these data • Defines forms you are going to use • Write program implementing those activities, i.e. mapping data to forms and parsing parms to get data Prototype using a simple (text only?) interface and thereafter implement a graphic UI if the simple one is accepted (move from simple to complex)

  14. Data Storage • Restricted amount of data • Flat system (files based) • Sufficient amount of data • RDBMS

  15. DB implementation • Connection-pooling • Cache (enough RAM) • ? Load balancing • Restrict connecting directly to DB computer • ODBC or direct string mapping Web browser/client Request Web server (IIS, Apache) Load & Run Program (PHP, ASP) Open connection Close DB (ORACLE, MySql, MS SQL Server)

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