Riak and Data at Multiple Data Centers

Protecting data by moving it to multiple data centers is getting more common:

It should come as no surprise to anyone that enterprises are continuing to push increasingly more traffic between their data centers. The drivers for this huge uptake in inter-data center WAN utilization range from the need to protect data (e.g. through replication and backup), to making data available ubiquitously (e.g. through active-active storage or live migration).

Basho Riak EnterpriseDS does this at the database level for you.