Xero presentation at Rackspace Route to SaaS event, London, 2 October 2008. Rod Drury, CEO, Xero

1. Delivering the Infrastructure for Scale Rod Drury, CEO, Xero www.xero.com

2. Research and Development Platform Vendor Picking winners High performance, scalability, maintainability, security, access to resources Global Hosting Global from day 1 Centralised database, fast from anywhere in the world Application Scale for competitive advantage Single instance, multi-tenanted, multi-user, plug in modules (e.g. tax), separation of UI, testable, debuggable, performance monitoring, role based security Operation Support Systems Server runs the business Build or buy, integration, logical separation from application, topology, ease of management, scale globally Teaming model Multi-disciplined team Design led, customer driven, product management, program management, QA

3. Our stack Development environment Microsoft Visual Studio 2008, Virtualisation for internal servers & QA Rendering framework XSLT, Ext.js Data Access LLBLGen pro Runtime platform ASP.Net with custom architecture, WCF Database SQL Server 2005 Enterprise Edition Database Server Windows Server 2003 x64 App Server Windows Server 2003 Hardware 23 servers, 8 for production, load balancing for web servers, clustering for database servers

4. Operational Systems Support (OSS model)

5. Global Hosting Model