amazon rds vs dynamodb

-type primary keys: The primary key is the hash value of an attribute. Dynamodb creates an unordered hash index for the primary key atrributes. In the preceding example, the product has an ID as the primary key. This is the hash attribute (attributes) of the table ). * Hash and Range Primary keys: A primary key is a combination of two attributes. The first attribute is hash attributes. The second attribute is range attribute.

combination of "UserID" (hash) and "timestamp" (range). By keeping the hash key element constant, you can search within the range keys element to retrieve the item. This way you can use the Query API to retrieve all the items of a single UserID in a series of timestamps, and so on, which is why Dynamodb is very much like SQL in the same way that it is nosql, and it's possible to achieve both the benefits of SQL and NoSQL, and see how you design your

with the same primary key hash value share the same partition in DynamoDB, the local level two index contains only items that are stored in the same location (the same partition). Therefore, LSI can be used to query items that have the same primary key hash value, but with different range keys.It is important to note that all the GSI related to the table must be specified when the table is created. A GSI index does not require that indexed properties

BKJIA, December 10 (Internet headlines) Amazon's RDS Service Relational Database Service (Relational Database Service) has brought us a MySQL Database server in the cloud, making the concept of "Database as a Service" a reality, it provides a fast automatic upgrading/downgrading ladder for existing MySQL applications to enter the cloud. We know that Amazon EC2 instances can run MySQL, and it also provides S

AWS Opsworks is an application management service. You can use it to define your application in one stack as a collection of different layers. Each stack provides package information that needs to be installed and configured, while also deploying any AWS resources defined in the Opsworks layer. Depending on the load or the predefined plan, Opsworks can also extend your application as needed. If you plan to use Mysql,oracle,sqlserver or PostgreSQL, then Amaz