- non-stop and high-speed EFTPOS transactions
- enriched payment functionality (including mobile)
- proven non-stop system availability
- PCI-DSS compliance, high data security
- expert 24/7 local customer support.
As its business grew, Tyro naturally needed to expand its infrastructure to handle the rising volume of transactions. At that time, its payment acquisition and processing systems were running on Red Hat Enterprise Linux, and the vendor’s subscription model made it inefficient to scale as the business grew. Equally, Tyro wanted to improve the quality of vendor support it was receiving.
“We felt that we weren’t getting much support out of the relationship, which meant we were spending time on the OS that would have been better spent on building our business,” said Sascha Hess. “By migrating to a different Linux distribution, we aimed to cut our total cost of ownership—both present and future—and to improve our focus on our core competence. We also saw this as an opportunity to make some architectural optimizations.”
services regulations but also with regulations and certifications relating to Medicare. Reviewing the list of approved operating systems at that time, the company determined that only two options
would meet its requirements: one was its existing OS, and the other was SUSE Linux Enterprise Server—which Tyro determined would reduce its total cost of ownership.
By choosing SUSE Linux Enterprise Service with Expanded Support, Tyro was able to plan for a staged migration, during which it would receive full expert support for both its new SUSE Linux Enterprise Server instances and its existing instances of Red Hat Enterprise Linux. “Expanded Support facilitated the migration quite a bit, enabling us to avoid a ‘big bang’ approach that would have tied up our resources,” said Sascha Hess. “This has enabled us to take a very steady and methodical approach to migrations that helps eliminate any risk of downtime. And while we migrate, we get full support from a single source for both our new SUSE Linux Enterprise Server instances and our outgoing Red Hat Enterprise Linux instances.”
The fully virtualized Tyro software stack runs on the company’s own Dell blade servers, which are hosted in two major third-party data centers. Tyro built its own multi-layer clustering solution to create an active-active landscape in which transaction loads are balanced across a duplicate
architecture in each data center. VMware virtualization enables Tyro to pack approximately 90 VMs into each set of four blades; in total, the company has more than 180 production VMs split between its two sites and a further 50+ VMs for development and testing. There are more than 60 different application artefacts, 70 application servers and over 200 running application artefact instances in total. There are also further Linux and Windows virtual servers for both corporate and production running infrastructure services and backoffice systems.
“With four blade servers in each data center, our environment is very small by the standards of a bank, but we are currently growing at 30 percent a year,” said Sascha Hess. “We pride ourselves on high availability—in the context of our business, we call it non-stop acquiring—and the
natural stability of SUSE Linux Enterprise Server is one of the elements that helps us to achieve this. Another element is the proactive expert support we receive from SUSE. The testing and quality control that go into each new release of SUSE Linux Enterprise Server help us to keep our critical payment processing systems running smoothly at all times.”
Security is another important aspect to the solution. It is built in at every level of Tyro’s architecture, ensuring among other things that merchant networks have no access to cardholder data—which removes the burden of PCI-DSS compliance from Tyro’s customers. “Using Linux makes it
easier for us to ensure security at the operating system level than if we were using non-open-source software,” said Sascha Hess. “In addition, the testing and quality control from SUSE help ensure that we deploy only previously-tested open source components.”
Tyro is embracing the collaborative ‘DevOps’ philosophy and uses agile and lean principles for software development. As the company moves towards a micro services model for its software, it is addressing the need to ramp up the speed of OS provisioning. Using pre-built OS templates in VMware, the company has a platform that already makes it fast and easy to create new virtual machines to host more servers. As part of its migration to SUSE Linux Enterprise Server, Tyro took
the opportunity to deploy the open source Puppet tool for configuration management, which is included in its SUSE Linux Enterprise Server subscription and helps it manage this standardized environment and automate common tasks. Equally, an in-house tool ensures the swift delivery of tested applications into production. To augment these existing capabilities and tools, and to further streamline back-end administration so that it can focus more on software development, Tyro is introducing SUSE Manager for server inventory and patch management.
“Our infrastructure has now reached the point at which we need to leverage a commercial product for managing the patching of the OS,” said Sascha Hess. “SUSE Manager will save us time and effort in patch management and reporting, which we can then reinvest in adding value to our core business of payments processing.”
“At a purely technical level, the differences between the red corner and the green corner are superficial,” said Sascha Hess. “The added value we get from SUSE is the support and the diligence in the testing of their packages before release—that’s what we’re paying for. The support has also been very good. When we found a bug in the Linux TCP stack that was causing intermittent latency problems for a small set of terminals, SUSE validated the issue and released a kernel patch for us that solved the problem.”
He added: “Availability is one of our key concerns, and we’re very happy with SUSE Linux Enterprise Server from that angle, too. Our main focus is on Java; the SUSE operating system gives us a stable, secure platform on which to run it.”
Tyro is continuing to optimize its Linux landscape, in particular by building in new automation features. As part of its move towards continuous delivery, the company is hoping to adopt a platform-as-a-service approach that will empower development and test teams to provision their own compute and storage resources as they require them. “We see ourselves as the internal IT service for the business, and we want to make it easy for developers and testers to be able to spin up consistent new environments at will,” said Sascha Hess. “This selfservice capability will help make us even more responsive to new demands as we continue to innovate and bring new products to the payments market.”