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System Administration

   Case Studies

System administration is the installation, testing, operation, troubleshooting, and monitoring of hardware and software systems. The Infrastructure Management consultants at Celeritas Technologies realize that there are many different activities involved in effective System Administration. At Celeritas, our goal is to deliver systems that are high performing, highly available, scalable, and easy to maintain and monitor. Celeritas' Infrastructure Management consultants provide the expert System Administration assistance clients need in order to plan, integrate, and manage their end-to-end computing environment.

This is a partial list of the tasks we perform when managing systems:
  • Install & configure the operating system
  • Upgrade the operating system & apply patches
  • Install & configure other software (database software,
    backup software, monitoring software)
  • Startup & shutdown processes
  • User account management
  • Set up disks & file systems
  • Manage/monitor system resources: CPU, memory,
    disk I/O, disk space usage
  • Securing the environment
  • Backup & recovery
  • Network configuration
  • Mail configuration
  • Printer configuration
  • Automate common tasks
  • Configure monitoring software to monitor and notify
Our expertise spans various operating systems:
  • Linux - Red Hat Linux, Fedora, SUSE, Debian
  • Unix - Sun Solaris, Tru64, HP-UX, AIX
  • Windows - Server 2003, Server 2000, NT

Celeritas Technologies also offers a Shared Services program: let our seasoned, certified professionals manage your systems.

System Administration Case Studies

Industry: Engineering
Project: Linux System Administration & Oracle e-Business Suite DBA Support

An international engineering firm was deploying Oracle e-Business Suite 11i on Red Hat Linux to support their enterprise. The company was primarily a Windows shop and had no prior Linux expertise. They requested Celeritas services and advice on best practices for installation, configuration, management and training in the Linux environment.

Celeritas built six Linux servers to support this environment. On each server, the Red Hat Linux Advanced Server operating system was installed and kernel parameters were configured specific to the Oracle e-Business Suite environment.

Celeritas also configured the local and SAN storage, implemented password policies using the Pluggable Authentication Module (PAM), configured Samba to provide access from Windows, created startup and shutdown scripts for various services, and scheduled jobs using the job control utility (crontab). Celeritas also installed and configured the Oracle technology stack for the e-Business Suite environment.

Ongoing system administration tasks included: downloading and installing Red Hat package updates each quarter, account management, monitoring for specific components and events and sending email notifications and pages when problems occurred, system and Oracle database backups, troubleshooting, and tuning.


Industry: Health Services
Project: Tru64 Administration & Support

A health services client requested help from Celeritas with several Compaq Tru64 and Oracle projects. These projects included moving (with minimal downtime) several production systems to new data centers, modifying storage on these systems, performance tuning of the production Oracle databases and network aggregation.

   Celeritas planned, documented and implemented the move of the production databases to allow for the production servers to be shipped out of town to a new data center. Celeritas rebuilt the HSG80 storageset and moved production storage from LSM mirrored volumes to AdvFS hardware mirrored volumes.

Celeritas also provided Oracle tuning advice related to the Oracle 9i upgrade and configured network aggregation with multiple GbE interfaces.



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