DynamoDB
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Time
19 hours 19 minutes
Difficulty
Intermediate
CEU/CPE
20
Video Transcription
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>> Hey everybody and welcome back.
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In this lecture we're going to talk about DynamoDB,
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which is a database service.
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On this lecture we're going to be defining what
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DynamoDB is and this will give
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you the context that you need to
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sit in the exam and understand the difference
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between this and other database services in AWS.
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What is DynamoDB? Well, it is a fully managed
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and very much available, NoSQL database.
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Not going to go into
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the differences between NoSQL and SQL,
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because that's something that you should probably
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check on before you dive into this exam.
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They're just basically
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two different types of databases and
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NoSQL's a little bit more beneficial to
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developers than relational databases.
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But you should definitely do
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a little bit of research so you
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understand the differences going in.
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But anyways, going back to DynamoDB,
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it is a NoSQL database.
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It is not a relational database.
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It scales massively, very, very scalable.
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It is a little bit expensive, I will say that.
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But that's not something
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that you're going to be quizzed on.
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It's just my personal thoughts on that.
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You get millions of requests per seconds,
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it integrates with IAM for security.
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It allows for event-driven programming.
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If you're going to be doing anything with Lambda,
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like we had just spoken about in the last lecture,
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DynamoDB may be a great option for
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you if you're looking for a database to integrate with.
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Some basics here. They're made up of tables.
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Each table has a primary key,
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infinite number of items.
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Each item has an attribute.
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The supported data types are
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scalar types and then document types.
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DynamoDB, read write capacity.
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You can control how you manage your tables capacity,
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you have that, you have
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provision mode which is your defaults.
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This is going to specify
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a number of reads, writes per second.
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You have a plan for capacity
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and a possibility for auto-scaling,
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and then you have your on-demand mode which read,
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writes are automatically scaled.
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There's no capacity planning.
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It's more expensive, but you pay for what you use.
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Two different pricing models basically.
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Provision, you are
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planning what you are going to be using.
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On-demand, no borders,
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no fences, go for it,
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but you're paying for that flexibility.
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What you could do is you can use
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the on-demand and then go to provision after.
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To summarize, DynamoDB is a NoSQL database,
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very highly available and very scalable.
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All the good things that we love about the Cloud,
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it plays nicely with all different types of services.
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Is very popular amongst developers.
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It's something that you can
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integrate well with your function apps as well.
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That is it for DynamoDB.
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You just need to know that it is
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a NoSQL database service. That's about it.
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We're going to compare this to RDS here in a second,
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which is our relational database service.
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I'll see you in the next lecture.
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