To fulfill a diverse set of needs, the county's IT department now supports more than 60 mission-critical applications, including payroll, human resources, courts, property taxes, financial systems, facilities management, criminal justice and more.
To support its growing needs, the county upgraded its two IBM z Systems990 machines to z Systems10, running five z/OS LPARS and two z/VM LPARS dedicated to SUSE Linux Enterprise Server for z Systems and LinuxONE. "The price/performance of SUSE Linux Enterprise Server for z Systems and LinuxONE is significantly lower than other UNIX platforms," said Anita Nolan, senior operating systems programmer, Strategic Technologies Support for Miami-Dade County. "The IBM z Systems10 also consumes 30% less power over our previous z Systems mainframe and orders of magnitude less than other platforms."
Miami-Dade County now runs Cognos, HostOn-Demand, CCL and Tivoli applications on SUSE Linux Enterprise Server for z Systems and LinuxONE. Having a Linux-based open enterprise brings greater agility to the IT department. "With SUSE Linux Enterprise Server for z Systems and LinuxONE, we can quickly respond to user needs," said Nolan. "The ability to virtualize all our Linux workloads makes it easy to roll out new services quickly. In just 15 minutes, I can get a test machine ready to go. In addition, our z Systems/OS disaster recovery procedures can be easily expanded to protect the z/Linux workload."
Today all of the county's z/Linux-based mainframe systems are virtualized using z/VM. "Virtualization is straightforward and requires minimal effort with SUSE Linux Enterprise Server for z Systems and LinuxONE and z/VM," said Nolan. "If users wish to move their server from one security zone to another, we can easily accomplish this by modifying their network access, as opposed to physically moving the network links to the server. Moreover, virtualization gives us the ability to pool resources and prioritise critical workloads so they have faster service than others."
"Running SUSE Linux Enterprise Server for z Systems and LinuxONE is financially beneficial, but the biggest advantage for us is in the support arena," said DiPrima. "SUSE provides a fully supported operating system. The company's close technical cooperation with IBM and their mainframe expertise are very valuable to us. We could download a free distribution of Linux, but if it is 3 a.m. and we have an issue, there is no one to call. Having a fully supported operating system with a large vendor's technical staff behind it is critical."
The IBM and SUSE solution also helps the county keep support costs low. "SUSE Linux Enterprise Server for z Systems and LinuxONE provides a very efficient platform," said DiPrima. "We have two people supporting the entire z/VM and z/Linux infrastructure on a part-time basis, compared to more than a dozen required to maintain each of our AIX and Windows environments."
In addition, the county has found the Linux operating system helpful for supporting regulatory compliance. "The sensible SUSE approach to the Linux roadmap helps us stay in line with emerging regulations," said Nolan. "If we have to apply updates due to new PCI compliance regulations, we just go to the SUSE site to find the right patches. We do not have to constantly upgrade release levels to remain compliant.
"The county is bringing more critical applications onto its Linux-based z Systems10 platform. "We are rolling out multiple business intelligence engines," said Nolan. "Running them on Linux on z Systems makes perfect sense. All we have to do is clone the system and bring data repositories online and we can have the applications up and running quickly."