Best Western Green Bay CHEMS 2013 SYSTEM ARCHITECTURE.

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Presentation transcript:

Best Western Green Bay CHEMS 2013 SYSTEM ARCHITECTURE

CHEMS SYSTEM ARCHITECTURE CHEMS CLOUD PROD #1 PROD #2 OP08 ORACLE DATABASE APPLICATION SERVERS DOT SERVER MACHINES (BITS) INTERNETCOUNTY CLIENT PC

COUNTY PC Relatively Current Windows PC Typically Windows XP, 7 or 8 possibly Installed and configured Internet Explorer (IE 10 OK) Faster is always better, if it’s slow CHEMS will be slow CHEMSPRO.EXE (Only thing needed) Install the CHEMSPRO.EXE on your machine Different install options to meet varying county security needs

CHEMS SYSTEM ARCHITECTURE CLOUD INTERNET

Reliable / Decent Internet Connection Required Faster is better here too, in terms of mb/sec Minimum – 1.5 x 1.5 ( Shared Courthouse link ) Better – 10 x 3 ( typical in standalone Depts ) Best – 50+ x 50+ ( fiber in some counties, DOT side is fiber ) Ping times matter too, average of about 30 msec or less is OK Shared lines can saturate dropping your speed to less than a dialup CHEMS won’t work right, even web pages appear to be failing

CHEMS SYSTEM ARCHITECTURE PROD #1 PROD #2 OP08 ORACLE DATABASE APPLICATION SERVERS DOT SERVER MACHINES (BITS)

DOT MACHINES Application Servers Prod #1 and Prod #2 are two identical physical application servers Quad Core Pentium 4, 32GB ram, IBM Blade servers Redundant - Sized so that one server can handle all of the load Balanced – Monthly the traffic to each app server is about the same BITS manages the hardware, I manage the CHEMS server software

DOT MACHINES CHEMS Server Software (on each physical server) IIS web services handles requests (SSL) coming in from your PC Your request is directed to either a DATA or REPORT ‘app’ server The DATA and REPORT servers communicate with the Oracle database DATA server program requests are passed back to your PC REPORT server program requests generate report pages on the server Rendered reports are then passed back to your PC

DOT MACHINES Oracle Database 11g running in a Unix Cluster managed by a group DOT Oracle DBA’s DOT follows a ‘by-the-book’ development practice Developers can NOT make direct changes to PROD or TEST SQL Code mods are allowed only in DEV, no tables or new code I submit requests for a change to the database, tables or code It’s reviewed, potential impacts, approved, and done by the DBA’s

SUMMARY CHEMS is a client/server based system utilizing a ‘Fat’ (EXE) client to provide the required functionality. Because it’s client/server the amount of bandwidth required is kept to a minimum. (keyed data and report pages) Windows compliant, reports come off faster and data entry is similar to AREV CHEMS even though it’s Windows based.