Plan/Discovery One/BootCamp

Stage 0 Systems

Deploying and maintaining a scalable and reliable web service.

1. Learning objectives

• What is ASLO?
• What is a system?
• What is scalablity?
• What is reliablity?

2. What is a System?

3. Why build a System?

4. Why are systems hard?

5. Critial thinking

• What is the problem being solved?
• What approach is being used?
• What benchmarks are being performed?
• What conclusions can be drawn?
• What are the next steps?

6. Parts of a web service.

• Model - database.
• View - html pages delivered to users
• Controller - web site code.

7. Activities.sugarlabs.org overview

8. What is the problem.

• Distribute activities
• Community of Users
• Community of developer

9. What is the approach.

• Links on a wiki
• Roll your own
• Build on existing open source project
• addons.sugarlabs.org

Stage 1 basic technologies

scripting language - php. database - mysql.

hands on- splitting scripting code and db on separate machines

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Stage 2 caching technologies

more memory memcached squid

hands on - adding caches

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Stage 3 Load balancing technologies

multiple databases multiple web servers

hands on - setting up slave server and multiple web nodes

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Stage 4 Reliability technologies

redundency failover

hands on - setting up proxy, web node, and datebase failover.

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