Data Synchronisation Flashcards by ACHIM SCHNEIDER

Q

Describe the Read-Only optimized Data Sync

A

Client calls the server with last sync time
Server returns changed and deleted entities
Client updates current local storage entities
Client deletes removed entities
Client updates last sync time
server only sends changed data

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Q

Describe Read-Write sync pattern with Last Write Wins strategy

A

Client retrieves changed entities(added, updated & deleted)
Client calls server with list of changes
Server updates data (added, updated & changed)
Server returns updated list of data
Client deletes current local storage
Client creates new local storage

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Q

Describe Read-Write sync with conflict detection

A

Client checks for unresolved conflicts(if so, aborts)
Client retrieves changed entities (Added, updated & deleted)
Client calls server with list of changes and last sync times
Server checks data for conflicting changes, creates list of conflicts
Server updates data (added, updated and deleted)
Server returns updated list of data and list of conflicts
Client checks for conflicts
Client deletes current local storage
Client creates new lpocal storage entities
Client resolves pending conflicts

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