52 Weeks AWS_ Episode 32-Certified-Developer-Part4-DynamoDB

Dynamodb is a database system that can create a table. You can utilize it; it is a fully managed service that will scale up and down. It also has a consistent and fast performance, like millisecond level performance when servicing it. Dynamo is a key value store in the document store. Each item comprises one or more attributes, so no two entities should have the same key. Unlike a relational database, dynamo DB doesn't have a predefined schema. That s a huge advantage for many scenarios. Dynamo allows fast access to items by specifying the primary key. But there s also places where you would want to have one or more secondary, basically alternate keys available. And one way to do that is by having a secondary index on the table. The secondary index would let you query, for example, data that s on the table by using an alternate key. In addition to the alternate key, you could also have a subset of other table attributes. There s a global secondary index with a partition key and a sort key, which are different from the base table. The amazon dynamodb transactions are a pretty easy way to simplify developer experience. So you can do, or nothing changes to, multiple items; you can have transactions that include consistency, isolation, and durability, called acid. There is a there s a kind of a rule of thumb that you can use to figure out the number of RCUS necessary. Many applications can benefit from the ability to capture changes to items stored in dynamo when these changes occur. Amazon dynamodb provides this on-demand backup and restore concept, which is fantastic, right? You can create a complete blockage so that you'll rest at night. You also have the idea of point-in-time recovery, which is pretty neat. AWS SDK for python is a great way to do that. I use boto three with dynamo; it s a great tool. The put item operation would create a new item or replace an old thing with a recent article. The get item operation allows you to retrieve a specific item from a dynamodb table. Dynamo is a pretty cool tool, and it s great for building fast prototypes. I think an excellent way to use it is to use the moto three A P I. And I would recommend doing things inside of cloud nine to get this superb experience.

52 Weeks of Cloud