Questions tagged [amazon-dynamodb]

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DynamoDB Cost in 2019

I am currently trying to line out the stack for a social-media-like application (users, follows, likes etc.). My initial plan was to do this with the Serverless Framework using AWS Lambda and most ...
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2answers
88 views

Running AWS Lambda in same VPC as DocumentDB or DynamoDB

We are currently running our AWS Lambda's in a VPC due to an earlier architectural decision. We are also using MongoDB Atlas and a peering connection setup between the VPC and Atlas. This obviously ...
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How to set up Application on EC2 to access DynamoDB?

I am studying AWS and preparing exam, one of the question I came out is: Which of the following items are required to allow an application deployed on an EC2 instance to write data to a DynamoDB ...
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59 views

current number of partitions of a DynamoDB table

The number of partitions is mostly dependent on WCU/RCU and amount of data. However, how can I check what's the current number of partitions (e.g. if one accidentally set the WCU too high for a short ...
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43 views

How do you decouple storage and compute resources without losing the benefits of locally attached storage?

Services like DynamoDB (not specifically, but it was the first that came to mind) provide dynamic scaling on write/read capacity (i.e. compute) as well as storage capacity. This means that you can ...
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1answer
709 views

Migrating from DynamoDB to RDS

I'm considering the different options available for migrating a DynamoDB Database to RDS. The data structure makes much more sense in a relational format. There are 8 tables with around 1 million ...
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1answer
373 views

Is it possible to use the Free Tier of AWS DynamoDB On Demand?

The DynamoDB On Demand Free Tier documentation describes the free tier as including 25 GB of data storage 2.5 million stream read requests from DynamoDB Streams 1 GB of data transfer out, ...
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71 views

AWS serverless setup for recurring tasks?

I have a database consisting of many items. At least one time per day I want to loop through all items in this database and for each item, call an external API to fetch current data about this item ...
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1answer
1k views

When happens when I reach max concurrent Lambda functions

I have 200 jsonl (json-lines) files in an s3 bucket. Each file contains 100,000 JSONs to be written into a DynamoDB. I want to use Lambda to download the file from S3, and batch-write it into the ...
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1answer
651 views

Tradeoffs for naming DynamoDB tables with CloudFormation

I’m creating some dynamodb tables via CloudFormation, which will be accessed by Python lambdas. It looks like I have two choices in naming the tables — let CF do it, and therefore put a whole bunch ...
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1answer
378 views

To implement persistent queue, should I go for RDS or DynamoDB on aws?

This is my use case: I have a decoupled application system. One application is accepting requests, validating, and queuing in SQS. Other application is mounted on a cluster of EC2 workers that will ...
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1answer
77 views

AWS Lowest latency infrastructure

I'd like to setup the most correct and lowest latency infrastructure for AWS. I would like to serve static Javascript files over CloudFront, and on top of that - a call to a dynamic server that will ...
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106 views

Convert case of DynamoDB data types in stream or dump

When I dump data from DynamoDB using a data pipeline, it looks like this, with lowercase data types: {"id":{"n":"2918466"},"time":{"n":"1404783111.4180515"},"user":{"s":"...
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1answer
828 views

DynamoDB Streams with Lambda, how to process related messages in order?

I want to use DynamoDB Streams + AWS Lambda to process chat messages. Messages regarding the same conversation user_idX:user_idY (a room) must be processed in order. Global ordering is not important. ...
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745 views

object mapping for [doc.awsRegion] tried to parse field [awsRegion] as object, but found a concrete value

I am using Logstash Dynamodb PLugin to index data to be able to query it. Everything was running pretty smoothly, until one of my teammates started messing with the schema, and broke it. We can still ...
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1answer
237 views

Does AWS support DBF files or Samba Shares?

We have DBF files running in our local network. It's on an Ubuntu Server running Samba shares. The DBF files are used by our in-house system running on xBase. Now we're moving everything to Amazon ...
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2k views

AWS DynamoDB Cost efficiency

I have to move a business application into the cloud, therefore cost is one of my biggest concerns. DynamoDB seems to be a good option, while a big part of our data is able to migrate from ...
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3answers
9k views

AWS ElastiCache/SimpleQueue vs DynamoDB

I'm wondering about the rationale for using ElastiCache/SimpleQueue vs just having "Cache" and "Queue" tables inside of DynamoDB respectively. It seems that the network latency to the Cache/Queue ...
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2answers
378 views

See how many times the provisioned throughput was decreased within the same day in a DynamoDB table

Is there anyway to see how many times the provisioned throughput was decreased within the same day (UTC) in a DynamoDB table? When increasing the provisioned throughput I am always afraid not to be ...
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1answer
8k views

Drop/Truncate DynamoDB table with AWS Data Pipeline

I have set up a Data Pipeline that imports files from an S3 bucket to a DynamoDB table, based on the predefined example. I want to truncate the table (or drop and create a new one) every time the ...
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1answer
5k views

Using DynamoDB for logging user activity

I am developing a freelancing platform for certain professionals. I was thinking of utilizing the AWS DynamoDB for logging user activity (like posting a job, editing a job etc). Fields would be ...
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2answers
5k views

Timeouts while trying to connect to DynamoDB endpoint

We were performing a test deployment of an application, that utilizes DynamoDB for persistency. A number of tables was created in the us-east region. Then we ran some tests against the application, ...
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3answers
2k views

amazon dynamoDB or MySQL for storing large arrays inside each row

I am trying to decide which database I should use for an application I'm making. I was leaning toward dynamoDB because of its scalability, but then I read in the documentation which said: there is ...
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2answers
10k views

How to set up AWS EC2 with apache

I am new to AWS and I have some basic set up questions that I can't find answers to. 1) I have created an EC2 instance using the default Amazon Linux AMI. How can I install apache? Then how can I ...
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1answer
820 views

Is it possible to run Joomla in DynamoDB?

I'm trying to find a scalable way to run my Joomla installation with Amazon Web Services. I was very excited with the announcement of DynamoDB, but I'm not sure about the challenges to run Joomla on a ...