Real time cooperative editing systems allowing multiple geographically dispersed users to view and edit a shared document at the same time.

1. 2/12/2015

2. CONCURRENCY COLLABORATION

3. Concurrency Collaboration
Real time cooperative editing systems allowing multiple geographically
dispersed users to view and edit a shared document at the same time
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4. Challenges
• Consistency maintenance under the following constrains:
– High responsiveness
– High concurrency
– High communication latency
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5. Traditional approaches
• Turn-taking
• Locking
• Serialization
• Causal ordering
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6. Eduwall
• A next generation real time collaboration
platform
– Web based
– Multi-user
– Multi-touch
– Allows real-time editing from multiple users using the same or
different devices
– Video-Conference features
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7. Approach
Operational Transformation (OT)
• Real time collaboration edition
– Reorders the operations
– Handles conflicts between operations
• Optimistic replication
– Local operations
• Non blocking/locking
– Remote operations
• Transformed according to concurrent local operations
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8. Eduwall
• Allows concurrent editions
• Supports high and low latency connections
• Does not favor high latency operations over low latency’s
operations
• Does not block or lock shared resources by design
• Solves operations locally and remotely
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9. www.eduwall.pt
geral@edubox.pt
THANK YOU!