1. Deniss Gaplevsky System engineer at inbox.lv

2. The portal inbox.lv is a leading national e-service in Latvia More than 80% Latvian inhabitants use inbox.lv services Since 2007 i nbox.lv is in the Latvian Top 20 Media i nbox.lv takes the 10th place among all the Latvian media (based on TNS Latvia)

3. Services Social networking LifestyleInfo Search Tools Daily

4. Evolution of Users Platform evolution

5. A Platform Evolution 1998-1999 (1,000 users* ) 1 server: smtp + filters + web + storage + db 2000-2001 (10,000 users*) 4 servers: smtp + filters, web, storage, db 2006-2009 (1,000,000 users*) 5 clusters, 100 servers: web - 14 servers incoming SMTP – 4 servers outgoing SMTP – 4 servers SQL – 4 servers anti SPAM- 5 servers anti Virus - 6 servers storage array - 37 servers *- active users

6. Free E-mail Service More than 600’000 logins per day More than 1’200’000 incoming messages per day Up to 200 Mbps of traffic More than 100 servers More than 250 TB of stored user data Up to 7’000’000 ads views per day

7. Server Room

8. Scheme of E-mail Service WEB SMTP POP SQL SpamAssasin Kaspersky Anti-Virus Kaspersky Anti-Spam UserStorage

9. Corporate Policy Open Source software – Quick adaptation – Simple identification and fixing of bugs Stable time-proven solutions Simplicity Unification & Standardization HARDWARE SOFTWARE MONITORING TEAM

10. Hardware Reliability Efficient energy saving Cost of ownership Price – AMD based servers – price, quality & energy saving – Intel, broadcom NICs – reliability & performance – 3ware, Adaptec SATA/SCSI – price & quality – HDD Hitachi – reliability

11. Clustering Basics One-type tasks requiring CPU + Memory balancing ability One-type servers Advantages Simple maintainability of clusters step-by-step manual Simple horizontal scaling of services High availability of services

12. Monitoring 7x24 Two parallel systems – Nagios – availability of services – Internal system – availability & thresholds Historical data and graphs - only for traffic and data storage. Two types of failures – routine failures failures of hardware or software. Reboot/removal as quick fix (partly delegated to hosting company) – critical failures failures of databases and balancers. Must be immediately fixed by inbox.lv team.

13. Team Highly qualified staff Interchangeability Separated responsibilities Documentation

14. Questions ? Thank You!