The key needs of SaaS vendors include: i) managing multi-tenant architectures with shared DBMS, ii) maintaining customer SLAs for uptime and performance and iii) optimized, efficient operations. The key benefits Continuent Tungsten offers SaaS vendors are: i) high availability and protection from data loss, ii) simple, efficient cluster management and iii) enable complex database topologies. Tungsten offers high-availability, database cluster management and management of complex topologies for multi-tenant architectures. Tungsten high availability and data protection features include maintaining live copies with data consistency checking and tightly coupled backup/restore integration with cluster management tools. Tungsten cluster management allows SaaS vendors to migrate customers and perform system upgrades without downtime, thus enabling these maintenance operations during normal business hours. Tungsten also enables complex replication topologies, including data filtering and data archiving strategies, maintaining extra data copies for data-marts, routing different customers to different DBMS copies, and providing cross-site multi-master replication.

1. Scalable SaaS Data Management with Tungsten Robert Hodges CTO, Continuent, Inc.

4. What’s So Hard about SaaS Data Management?

8. Introducing Tungsten Clustering

11. Tungsten Clustering In Action Master DB Slave DB Master Host Slave Host Replicator Manager/Monitor Replicator Manager/Monitor Application Server SQL Router/Connector Application Server SQL Router/Connector Management Client Management Client

12. Distributed Rule-Based Management Broadcast commands and monitoring data Business Rules Manager #1 (Coordinator) Manager #3 Manager #2 Admin Client #1 Admin Client #3 Group Communications Admin Client #2 Local DBMS Resources Local DBMS Resources Local DBMS Resources

13. Implementing SaaS Data Management with Tungsten

15. Typical SaaS Architecture globalds1 tenantds1 tenantds4 tenantds4 tenantds2 Global tenant definitions and billing data Per tenant data (usually many tenants per service) globalds1 Master/slave pair for each service Implementation tenantds2 tenantds4 tenantds3 tenantds1

18. Multiple Routes to Databases Java App Server Tungsten SQL Router PHP Application Tungsten Connector libmysqlclient.a Tungsten Cluster MySQL JDBC Driver Admin & Monitoring Admin & Monitoring Virtual IP Address

21. A Short Digression on Backups MySQL Server DBMS Data Files Active Host Applications Backup HOT/COLD: mysqldump Backup HOT: LVM snapshot HOT: InnoDB Hot Backup COLD: File system copy

28. SaaS Problems and Tungsten Solutions MySQL 5.0/5.1 Open source databases Cctrl switch operation and offline/online commands System maintenance Upgrades via replication; slave upgrade Application upgrades Automated and manual failover; live replicas; recovery procedures Handling failures Backups; live replicas; consistency checks Protecting tenant data from loss or corruption Tenant-based load balancing Performance scaling Simple installation; cctrl distributed commands Implementing easy-to-manage clusters “ Best-practices” database design Multi-tenant architecture Tungsten Features(s) Problem

30. Commercial Support for SaaS from Continuent

35. Contact Information EMEA and APAC Lars Sonckin kaari 16 02600 Espoo, Finland Tel +358 50 517 9059 Fax +358 9 863 0060 Continuent Web Site: http://www.continuent.com HQ and Americas 560 S. Winchester Blvd., Suite 500 San Jose, CA 95128 Tel (866) 998-3642 Fax (408) 668-1009 e -mail: [email_address]

36. Backup Slides