Questions tagged [nosql]

Databases that propose alternative solution to SQL (Relational) Database which can be document oriented, key/value, graph, objects,...

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13 views

Abstracting resource permissions in noSQL

I'm building a booking system and my team is currently constructing a web application for the system where a staff member should be able to manage all the bookings related to a user with permission to ...
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14 views

Storing common data across tenants in NoSQL databases like mongoDB

We are designing a multi-tenant architecture. In our multi-tenant architecture, there are different email templates that are shared across all the tenants. Email template looks like subject: {...
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2answers
72 views

Saving & Referencing different Schema Types in MongoDB (e.g. for a CMS with Building Blocks)

Say I wanted to build my own CMS system and store data in MongoDB. I would like to have a Collection called BlogArticle. Each article can have a different structure, but will be put together by the ...
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1answer
117 views

Can I manage a NoSQL database with only JavaScript?

I am creating an app with Deno (a personal project), and I manage the "database" with only the Javascript code of the Deno enviroment, modifying JSON files like any other JS object. For me, ...
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27 views

MongoDB schema to support concurrent update on a document

We were working on a project with a 300 documents with currentValue field in a main collection, in order to track the history of each document of first collection. we created another collection named ...
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45 views

Microservices: blog post -comment

I am studying Microservices and designing an application with a blog functionality. User can create a post, someone can comment on it, someone else might like the comment. And here comes probably one ...
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1answer
55 views

AWS Architecture: How to search in Dynamodb?

Firstly, I want to state that this is my first time trying to build an app. I am doing this for fun, mostly as an exercise to learn system design/architecture. The goal is to build an app that would ...
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1answer
103 views

Can we do domain modelling or create domain entities/models in NoSQL like Amazon DynamoDB? If yes then how?

Recently I was going through an article (link at the end) on AWS for DynamoDB NoSQL and got to know that they are suggesting to only have a single table with certain access patterns in your NoSQL ...
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67 views

Should I use Odata with non-relational database?

I'm working on a project where I need to expose Odata endpoints to the clients, and we are using CosmosDB for our database. Most of the documents I found on implementing Odata with Cosmos DB actually ...
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1answer
45 views

Thoughts on adding a DB collection with a single record for version

I'm building an application with Google Firebase and Firestore that has it's structure defined in the DB. This structure is not very big and doesn't change all that often. This structure is stored in ...
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67 views

Outbox pattern in a monolith with NoSQL?

As I have come to understand, there is generally two ways of ensuring atomicity of both domain events and state changes to aggregate roots in order to achieve at least once delivery of events--the ...
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125 views

Relational or non-relational database for storing and querying log data?

I'm planning to extend an application with logging of user events. (Client application via REST-API to Symfony). What is the preferred type of databases? Currently the log data is stored in a ...
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2answers
312 views

When would I pick NoSQL over SQL when dealing with partly schema-less data?

so, I'm currently developing a feature for a website of mine, which aims to gather a set of financial data from the user so the user can start and take care of a budget, as well as the website ...
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30 views

Structuring data effectively on cloud firestore

Situation: There is N number of users and n number of user groups (N >= n) where each user belongs to a user group. For example: group1 = [user1, user2], group2 = [user3, user4, user5], etc. How to ...
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1answer
109 views

How to create an Event-Driven Architecture with many external sources

I work for this Accounting company - as a Product Owner - that uses several external services (one for Contract management, another one for Accounting Demands management, a third one for Financial ...
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2answers
43 views

Does it make sense for a large scale SaaS project to use a single all powerful SQL/RDBMS database?

Scalability seems to be a thing now. I was in a heated argument with one of my developer who insist on using MySQL for a data intensive application we are building. MySql is easy, fits the purpose and ...
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41 views

NoSQL Database Schema w/ Very Flexible Hierarchy

Recently I have been working with a NoSQL database (Firestore to be exact) to be used for my Web App where we essentially allow our users to create 'trees' of some sort. What this means is that you ...
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2answers
195 views

What's the use of a wide-column NoSQL db such as Cassandra over a K-V store or a document based db?

Say we're making a simple photo app. This link says that we can store the image in S3 and now have a URL. Great. Next, we need a mapping of a UserID to the many images they've created. For this, it ...
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20 views

Firestore implement Notifications View

So to begin with this question is not related to Push Notifications. What I want to achieve is a View in which all notifications are displayed. Something like Instagram or Facebook. There could be a ...
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1answer
53 views

Keeping JSON in database

I'm trying to create web app(flask or django-rest) that would scrape some data and save it to JSON so that it can be viewed in the frontend (VueJS). I'm wondering if it is better to save the scraped ...
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3answers
109 views

Can I manage thousands of concurrent connections with a non-Node stack?

I'm developing a social network with Django (Python) + Postgres SQL. My site will have a chat feature so that users can communicate to each other in real-time, and the communication will be only from ...
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54 views

Creating group/applicaton/user permissions around mongodb documents

I'm trying to find a good way to manage permissions for a high number of mongo documents. What I want to do: Apply group/user/and or application permissions to mongo documents. Idea 1: Use mysql ...
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1answer
46 views

Saving large files like Credit Reports in Data Store - SQL/NoSQL/ObjectStore

I am working on a project to save external credit bureau reports in database. These reports are typically big and could go from 0.5MB to 5.0 MB. Number of files will grow exponentially over the time ...
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1answer
219 views

What *really* is the difference between relational and non-relational data?

Here is where I am at right now: I know that relational data, like that found in relational databases like MySQL or Postgres, is relational because there are relations between the tables. That is the ...
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32 views

Partial database synchronisation across multiple databases

Currently we are looking for a solution to sync databases across multiple locations. We a location hierarchy such as Country -> State -> District -> Center. To increase speed and reliability of the ...
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1answer
32 views

Storage and partitioning in Cosmos DB

I'm working on designing a system for reporting/storing information on hardware devices (IoT-like), and trying to figure out how that would best be structured in Azure's Cosmos DB. Every device will ...
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1answer
47 views

Firebase prefer separate collections over mixed collection?

I'm writing an education app and my current Firebase structure looks like: Course ∟ Lesson ∟ Modules (Includes video, audio, text and quiz modules in one collection) Where "Course", "...
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1answer
89 views

Query by NoSQL keys versus SQL hash

I am trying to decide between a NoSQL (MongoDB) or a SQL (Oracle) database for my project. This database will be used to store output files from a set of parameters. I can model this as a MongoDB ...
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2answers
74 views

System design for filtering/sorting objects whose properties are stored in distributed storage

Imagine that we have a storage of objects O (can be in SQL, NoSQL, doesn't matter) where the object contains some property P_1 to P_n. Some of these properties are stored in storage S1, some in ...
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1answer
78 views

Uncertain of cache solutions for CAD models

I am running a personal project of offering 3D model generation as a service (in this case CAD model). Since most of the generation of 3D models take a long time, I thought about using cache to ...
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1answer
260 views

Is it recommended to use schemas on non-relational databases?

I'm trying to figure out if the use of schemas on non-relational schemaless databases like MongoDB is a recommended practice or a bad practice to be avoided. I am doing research work and am looking ...
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3answers
96 views

How should I best structure my app when I want to sort a “parent” model by a property computed on another “child” model?

Question about OO-programming, functional programming, NoSQL, SQL databases, and software architecture Hi all, I am a intermediate-level self-taught programmer, and have been dying to get an answer ...
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1answer
560 views

Optimizing inserting/storing Large amount of data in database

We have a POST API that takes data from the Client and send it to different applications (Payment, Email, SMS). We also store all the data sent by the Client in a database for future analytics ...
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2answers
705 views

Designing database: split into different tables or group them together?

I am fairly new to database design and now trying to build my own forum-based application. The app will have nested categories as countries > systems > levels > subjects In every subject ...
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2answers
120 views

Gathering data from JSON fields in a relational database

I'm working on a small e-commerce solution which uses MySQL. At first there was an initiative by the boss to use MongoDB but I suggested relational database because there are lot entities with ...
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0answers
59 views

What is the correct way of setting and then differentiating between paid and free user in Firebase / Firestore?

I am developing a mobile application that will have both free and paid versions. The way I see how I could differentiate between what is a paid and free user is to set a property isPaid on their ...
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1answer
30 views

Update items based on a read operations on same items is a bad practice?

DynamoDB is the database solution, I'm using to store my items. It's a NoSQL/Document database and I got a real problem on real-time updates of items. First, the saved format is like { expiredTime:...
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2answers
1k views

How to update a NoSQL database and publish event atomically in an event-driven microservices architecture?

In an event-driven microservices architecture, services typically need to update their domain state and publish an integration event to a service bus at the same time (Either both operations complete, ...
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22 views

Efficiently querying for a set of objects for price comparison

I am designing a system where a user can input a budget and a query returns to them sets of objects that they can afford from different vendors. The system has 100s of different combination types (i.e ...
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4answers
1k views

Database agnostic DAO (NoSQL + SQL)

Background While writing a new component, I m in middle of making a decision of SQL/NOSQL database (Mongo vs Mysql) for my storage layer. As of today, mysql seems to be a perfect fit for my use-case (...
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2answers
155 views

Some Suggestion about Data Modeling

I want to make a social game for Android. I am using NoSQL Based Database (MongoDB) and I am using NodeJs. I am using Android-Volley library to make POST and GET requests. But I am stucked on ...
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5answers
896 views

My team is scared of relational database entities with foreign key relationships and I don't understand why

I'm relatively fresh out of college so most of my familiarity with relational databases is from my databases course where anything not in BCNF or 3NF is a travesty. Certainly that's one end of the ...
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1answer
257 views

Some Guidance on Parent-Child Relationships in Elasticsearch

I would like some guidance in setting up my document structure Elasticsearch. The company I work for has an app that stores around 20,000 new phone records each day in a SQL database. And we feel we ...
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2answers
205 views

Most efficient way to get unique customer count

I'm working on a system that stores details of customer purchases for several stores. One statistic that they would like is to know how many unique customers they have had over a specified day range, ...
2
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1answer
71 views

Alternatives to RDBMS For Forecast Data

I currently capture well structured forecast data in a SQL Server. An example of this data is below: What this tells me is that each day, I receive a forecast for the next three days. Note that in ...
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1answer
306 views

Regarding data modeling in a NoSQL use case

I am reading the following link to learn about system designs of various systems. (This is a paid link, I am attaching all explanations below.) In an attempt to explain the system design of Instagram ...
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1answer
654 views

How to think about queries in NoSQL

I'm writing a project for school - Tinder-like app. I thought of implementing database entirely in RDBMS (PostgreSQL). But now I think it's a good opportunity to get to know NoSQL systems a bit. I'm ...
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2answers
549 views

How to model JSON data so it can be easily de-serialized in to simple Java classes?

Context Currently I'm struggling with correctly modeling a small instruction set I want to send as JSON to an Android application to generate a list of UI parts. Right now it's layered as pretty much ...
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45 views

Giving search on customizable fields

I have some user defined custom fields corresponding to a ticket (A ticket is an entity which has subject, status and custom fields). I need to search tickets based on its custom field values. A ...
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2answers
341 views

How is Eventual Consistency (EC) better than Strong Consistency (SC) when N = 3, R=W=2 when SC gives better consistency gurantee in same config?

In dynamo paper, it says that in production most of the users set N = 3, R = 2 and W = 2. The common (N,R,W) configuration used by several instances of Dynamo is (3,2,2). These values are chosen to ...

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