1. UNIX Epi
Dakai Zhu
January 5th, 2005

2. Servers
Cedric
Penrose
Request

3. Cedric Basics: 8 CPUs (770MHz each), 16GB RAM + swap
File system: NFS for all UNIX users’ home directory – default location for all files. Currently, 3 partitions, 35GB each

4. Cedric (Cont.) User account database (NIS) – master
Major statistical programs: SAS, S+, SAGE, CAGE, Linkage, ACT
Programming environment: FORTRAN, C, C++, Java, PHP, Perl, Shell scripting

5. Cedric (Cont.) This is where your home directory is.
This is where you are actually logging into.
Files are backed up via SANS, daily.
John Fueger will give a talk on SANS on Wednesday February 2nd, 2005

6. penrose Used to offer main computation power
Will retire soon and be replaced be a new SUN box for additional computing capacity.
User can access its CPUs, Memory, and run Customize compiled programs
Use of this box can cause network congestion – ask for temp spaces!
Should we back up this one?

7. request Departmental Web server POP3 E-Mail server
Web application server (oracle client etc.)
No computational tasks please
Will be upgraded to a new box early 2005

8. Web Computing
Database
Business layer
Web client

9. Database
Oracle tables, queries etc.

10. Business layer Fetching data to and from database
Execute customer request behind the scene
Generate Web contents

11. Business layer (Cont.)
Database transactions: fetching database to and from the database (demo)

12. Business layer (Cont.)
Can execute any command line commands, such as SAS, S+ (demo)

13. Business layer (Cont.)
Generate Web contents on the fly (demo)

14. Web client
Internet Explorer
Netscape
Web forms etc.