Ralf Lehmann, your IT-specialist with experience since 1991, working for:
  • Bayernwerk AG
  • Allianz, DePfa, Unicredit (HypoVereinsbank), Commerzbank, Deutsche Bank, Credit Suisse, Pioneer Investments
  • Fujitsu, Sun Microsystems
Your experienced expert for
  • Apache Kafka, Setup and Operation; Confluent Connectors for database connection
  • Mairadb database, operations and programming
  • Freeradius high availability Setup, module development for Kafka connectivity
  • Design and setup of Red Hat and Ubuntu Linux and Oracle Solaris server
  • Datacenter migration
  • Virtualisation of UNIX servers on basis of Linux KVM and Solaris Container
  • Harddisk mirror, striping via Solaris LVM (known as SDS), Veritas Volume Manager and Linux LVM, MD
  • Analysis and performance tuning of Red Hat Linux and Solaris server
  • Analysis and correction of network problems involving routing, name services und network interfaces
  • Analysis and troubleshooting of netzwork services like NFS, TCP/IP, DNS and NIS+
  • Upgrade of Linux and Solaris server to higher OS releases
  • Design and implementation of high availability solutions via Solaris Cluster and Veritas Cluster
  • Integration of applications to high available environments
  • Creation of Solaris and RPM software pakages for automated installation via Jumpstart and satelite server