Database Reference
In-Depth Information
Service-oriented architecture
Amazon's platform is fully service oriented, which means various components in Amazon's
ecosystem are exposed as a service for the other services to consume. Each service has to
maintain its SLA in order to complete the response accurately and on time. SLA is a Ser-
vice Level Agreement where a service agrees to provide a response within the said time for
a said number of requests per second. In Amazon's service-oriented architecture, it is very
important for services to maintain the agreement, as Amazon's request response engine
builds the response dynamically by combining the results from many services. Even to an-
swer a single request on Amazon's e-commerce website, hundreds of services come togeth-
er to form the response.
In the following diagram, the request comes from the web via Amazon's e-commerce plat-
form, which is then forwarded to various services to get the appropriate data from Dy-
namoDB. Data transfer happens in DynamoDB from simple APIs like GET/PUT/DELETE.
The data from various services gets aggregated, and then it's provided to the page rendering
service, which actually builds the page.
