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Cold Fusion High Availability “Taking It To The Next Level” Presenter: Jason Baker, Digital North

Cold Fusion High Availability “Taking It To The Next Level” Presenter: Jason Baker, Digital North Date: 01.07.2004. About the Presenter:. 7 years of Cold Fusion development experience Participated in the development of 100+ Cold Fusion websites

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Cold Fusion High Availability “Taking It To The Next Level” Presenter: Jason Baker, Digital North

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  1. Cold Fusion High Availability “Taking It To The Next Level” Presenter: Jason Baker, Digital North Date: 01.07.2004

  2. About the Presenter: • 7 years of Cold Fusion development experience • Participated in the development of 100+ Cold Fusion websites • 10 years of Webhosting/ ISP/ Telecommunications experience • Co-Founder and Director of Operations for Digital North • Email: jbaker@digitalnorth.net

  3. About Digital North: • Business Class Hosting Provider since 2001 • Shared and Dedicated Hosting, Colocation, Managed Services • 3 Data Centers: Agiliti, Inflow, Visi • Windows, Linux, IIS, Apache, MS SQL, Load Balancing, Firewalls, Cold Fusion 4.5-6.1, Flash Remoting • We serve over 1,000 business customers • www.digitalnorth.net

  4. What is High Availability? • High Availability (HA) web applications provide maximum uptime while minimizing risks associated with service failures. • We need to think about the Datacenter, Network, Server, OS, Application, People • Risks: Architecture changes, Business process changes, Cost • Rewards: Better uptime, faster websites, happy customers 

  5. HA Infrastructure Requirements • Environment Is Everything • Physical service location • Climate control • Physical security – protection from yourself • Power backup and redundancy • Multiple upstream providers • Local network redundancy • Fire suppression

  6. HA Webserver Requirements • Server-class machine • Redundant power supplies • Redundant Array of Independent Disks (RAID) • Network storage • Redundant network access • Latest Firmware updates

  7. HA OS & Application Requirements • Hardened OS: Windows, Linux, Sun • Security and performance tweaks • Virus Protection • Firewall Protection • Intrusion Detection • Data Backup – Onsite and Offsite • Service Monitoring • Cold Fusion Security Best Practices http://www.macromedia.com/devnet/server_archive/articles/prioritizing_network_server_security.html Macromedia Security Zone: http://www.macromedia.com/devnet/security/security_zone/

  8. What is Load Balancing? • Load Balancing is using multiple webservers to maximize service performance and minimize service failures. • 2+ servers can handle more requests or handle current requests faster • 2+ servers minimize risks associated with hardware failure, OS failure, Cold Fusion failure

  9. Load Balancing Techniques • DNS Round-Robin: El Cheapo Method • Software Load Balancing: The Heartbeat • Cold Fusion MX for J2EE: Multiple Instances Application Isolation ColdFusion Development Center:http://www.macromedia.com/devnet/mx/coldfusion/clustering.html • Cold Fusion Distributed Mode • Hardware Load Balancing http://www.macromedia.com/devnet/server_archive/articles/choosing_hardware_lbdevice.html

  10. Hardware Load Balancing • Network Architecture • Server failover: one server takes the load of two servers • Load balancing algorithms: Round Robin, Least Used, Fastest Response • Sticky sessions • Service monitoring agents • Active Content Verification

  11. Cold Fusion Development Issues • Best case scenario: Cold Fusion installation is identical on multiple servers • Store Cold Fusion session information in a database!! (Common problem) • Beware of local databases (MS Access) • Beware of writing to local disk (uploads), memory, or registry • Use replication to deploy application • Create a clustered development environment to properly test

  12. Additional Design Issues • Load balanced applications could share similar failure points • Recognize issues related to applications sharing a common database • SSL requirements: same key on each server or SSL proxy on hardware • Logfile analysis tools need to handle multiple logs • Stress test your applications in a load balanced environment

  13. Hardware Load Balancing Costs • Costs for an entry-level solution (2 servers, < 1000 simultaneous connections, 5-10 Mb/s bandwidth) • Hardware: 2 – Dell/HP/IBM Servers $6,000 1 – Load Balancing Switch $5,000 • Software: 2 – MS Windows 2000 $1,500 2 – Cold Fusion MX $2,500 1 – File Replication $1,000 • Labor: 8 hours $1,000 • Total: $17,000

  14. Questions?Thank you!jbaker@digitalnorth.net

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