Why databases will follow applications into the cloud

摘要

As increasing numbers of applications move to the cloud, architects need to think about system performance. A key benefit of the cloud is access to resources on demand so that, as applications need more processor, memory or disk space, these can be provisioned on demand.rnBut this is irrelevant if the applications and the databases on which they rely are too far apart. This creates a significant challenge for a lot of companies and can be compounded by the cloud model they choose.rnAs application and database get further apart, latency increases. Typically, organisations whose databases and applications are in the same metropolitan area network (MAN) should be able to cope with the latency, but beyond this the delay causes problems.