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I am a learning by hands-on or video person. Are there any resources out there to learn complex querying in DynamoDB for instance querying in deeply nested maps? I want to have a practice and it will help me design DynamoDBs better.
The docs are hard to follow for queries/filter.
Any resources will help. Thank you.
Here are some great resources that I gathered available online for you to learn DynamoDB:
Best Practices for Designing and Architecting with DynamoDB
alexdebrie/awesome-dynamodb
Build with DynamoDB
Serverless Stack (Start your first fully serverless project)
AWS DynamoDB Guides - Everything you need to know about DynamoDB
AWS DynamoDB
The DynamoDB Book
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I've been thinking with my team which solution is the best for deploying Apache Airflow on AWS in terms of cost and performance. We did some research and found out some solutions, among them using Kubernetes (EKS), a machine on EC2 and using ECS (Fargate). But, on Google there isn't so much detailed contents about it. Also, we did some estimates based on our calculations, however, we're not so sure about that. We are looking for a discussion about the trade off of each solution.
So, my question is: is there someone who is going through this or someone who has been through this? And, which is, if exists, the best solution?
In late 2020, AWS announced Amazon Managed Workflows for Apache Airflow (MWAA). It is a fully managed service that makes it easy to run open-source versions of Apache Airflow (including v2) on AWS.
I'd suggest having a read through the documentation to find out more and determine if it meets your requirements.
From my personal experience: I had previously managed an Airflow stack using EC2 and ECS worker pools. Moving over to MWAA has definitely been a better solution & provided a much better user experience.
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I am working on an application that has some scalability requirements and consists of a web-based front-end along with a set of services and workflows. In the architecture that I have designed, some of these services will perform necessary transformations on a given set of data, pull additional data from a database, and so on.
In terms of documenting my architectural design, I am wondering if someone can suggest a couple books or some reading material on what are the best practices. I am not looking for a guide on UML. Let me clarify...
For example: I have a service... let's call it my Workflow service. It will take a request, read some stuff from a database to look up that request, and trigger a workflow. Sounds easy enough. In terms of the architectural design, lets say I break off the database logic into its own module or package... should this just be called the blahblahblahDAO or blahblahblahBusinessObjects?
Thanks in advance.
If you are looking for deeper insights in how to layer real software and what proper names they should have you should read about Domain Driven Design
First and classic book (be aware that it's very general). As for something practical you can check out this book or just google for some online examples.
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I wanted to store Browsenodes of Amazon in my database. I found the complete list of this one on this url http://docs.amazonwebservices.com/AWSECommerceService/latest/DG/BrowseNodeIDs.html . I think those are just the parent nodes which is fine to me.
Does anyone of you have a database for Amazon Browsenodes, it would be too hassle to manually encode it in the database or to web scrape it.
Your help would be greatly appreciated and rewarded!
Thanks!
You can download a mySQL database of the Amazon USA nodes on aFeeds. There's a small fee to obtain the entire database, but there's a free sample containing all the Book nodes.
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A few months ago I visited an interesting web site. It was a web to create data models (online) and web services (rest or soap) and deploy them at the moment, all without coding any server or SQL.
I think it's interesting for creating prototypes when I create iOS apps, as many of them are just web service consumers.
The problem is that I forgot the name of the website.
Do you know that website or similar services?
Thanks.
You're probably talking about https://parse.com/, they are really doing a great job, iterating really fast. I used them in the past and I would go with Parse anytime before Stackmob.
Stackmob is one such service that allows you to create models on their servers easily.
https://www.stackmob.com/
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I am looking for a free service (providing a web service or a database that gets updated regularly) that will allow me to retrieve the Geolocations (Long/Lat) for Country/Prov/City.
Yahoo & Google's API's are unacceptable as they limit the total amount of requests DAILY.
I'm a fan of Geolite, they have both city and country databases, freely available api's in a number of languages and they update the databases on a fairly regular basis.
Have you looked at GeoNames?
Try iopatch.com. It's also free and unlimited.
Have a look at TIGER line data
EDIT: In my experience it's not as accurate as NAVTEQ data (i think google and yahoo use them) but its what you get for free.