partial replication in dynamoDB global tables

Question

DynamoDB documentation on global tables is not very clear when it says this,  
  
"With a global table, each replica table stores the same set of data items. DynamoDB does not support partial replication of only some of the items."  
  
Ref - https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/globaltables_HowItWorks.html  
  
What does this mean exactly?  
  
Could someone explain this with an example?  
  
Thanks!

Accepted Answer

Lets say you have a Global table with replicas in region 'us-east-1' and 'us-west-2'. You have performed write operation (100 items) on replica in region 'us-east-1'. So by default all 100 items will be replicated to table in us-west-2. You cant restrict or configure your Global table to only partially replicate only few items (lets say 5 out of 100).   
  
This is what is mentioned in developer docs you are referencing  
  
Hopefully it helps. Let us know if you have any other questions

Answer

> _shantanus wrote:_    
> Thanks for the reply Ankur. That seems to be what they have said.  
> Why would anyone want to do that though?  
For example, some customers have policies, regulations, etc. that require certain data not leave home regions.  
  
-Jeff

Answer

Thanks for the reply Ankur. That seems to be what they have said.  
Why would anyone want to do that though?

partial replication in dynamoDB global tables

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