UNIX Computation @ Epi Dakai Zhu January 5th, 2005

Servers Cedric Penrose Request

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

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

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

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?

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

Web Computing Database Business layer Web client

Database Oracle tables, queries etc.

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

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

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

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

Web client Internet Explorer Netscape Web forms etc.