IDK0040 Võrgurakendused I Building a site: Implementation Deniss Kumlander.

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Presentation transcript:

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 data management system (Database, files [flat] etc) TCP/IP Resources (processor, HDD, network)

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

Domain or /.com etcwww.yourname.eu –Registrar + DNS address

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? –

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

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

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

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” –Download –Limits Internal network

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

Realisation

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)

Data Storage Restricted amount of data –Flat system (files based) Sufficient amount of data –RDBMS

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