Planning for Synchronization with Browser-Local Databases

Eric Farrar, Product Manager Sybase iAnywhere October 20 th , 2009 Preparing for Synchronization with Browser-local Databases

Web applications are always online. Aren’t they? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

It Isn’t Only About Going Offline ,[object Object],[object Object]

Browser-Local Databases ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

But... ,[object Object],[object Object],[object Object]

Synchronization ,[object Object],[object Object],[object Object],[object Object],[object Object]

How often are you synchronizing? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

What are you synchronizing? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

“A few rows up, a few rows down. What’s so hard about that?” ,[object Object],[object Object],[object Object],Contact ID Name Address City Last Contact 102 Homer Simpson 742 Evergreen Terrace Springfield 2009-10-10 10:00

Data Subsetting ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Implementing Subsetting for Contacts ,[object Object],RowID User ID City 1 0001 Springfield 2 0002 Ogdenville 3 0003 Springfield 4 0003 Ogdenville 5 ... ...

Adding Contacts ,[object Object],[object Object],[object Object],[object Object],Contact ID Name Address City Last Contact ???? Mr. Teeny 123 Fake Street Springfield 2009-10-10 10:00

GUIDs to the Rescue. Maybe... ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Composite Keys ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Primary Key Pools ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Deleting a Contact ,[object Object],[object Object],[object Object],[object Object],[object Object]

Updating a Column ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Non-Synchronized Deletes ,[object Object],[object Object]

Our Simple Contact List ,[object Object],[object Object]

Our Not-So-Simple Synced Contact List ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Data Reassignment ,[object Object],[object Object],[object Object],[object Object],[object Object]

Referential Integrity: Friend or Foe? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Application and Schema Upgrades ,[object Object],[object Object],[object Object],[object Object]

Data Integrity in the Field ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

What else might you want? ,[object Object],[object Object],[object Object],[object Object],[object Object]

Summary ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object]

Planning for Synchronization with Browser-Local Databases

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