A catch-all term describing database systems using various non-relational models. Such systems are usually engineered to be high-performance.

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Which NoSQL Database is best suited?

I have been reading a lot of blogs trying to determine which NoSQL database would be best. I am looking at moving from file based (xml) storage to using a database. The application will be storing ...
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15 views

Mongodb database design

I'm planning to implement this schema in Mongodb, I have been doing some readings about schema design, and the notion was whenever you structure your data like a relational database you must be doing ...
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2answers
34 views

What is considered as a document in mongoDB?

I have been learning MongoDB for the past two days and I've been confused with documents and their limits, and how to overcome the limits. What is a difference between documents and collection?
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9 views

Product Features table for No Sql Databse

I want to design database to save products features. Actually i want to store all features of mobile given on this link http://www.gsmarena.com/samsung_galaxy_j7-7185.php After search on google i ...
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8 views

Titan on HBase 1.x [closed]

I am running Titan 0.53 on HBase 0.98 right now. But wanted to upgrade HBase to 1.1. Is there any compatibility issues between Titan 0.53 and HBase 1.1?
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22 views

Cassandra filtering multiple items

I am attempting to learn Cassandra by taking my RDBMS database and create a nosql version of it. Forgive any mistakes I am just making a quick example so I can ask my question. Here is my ...
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0answers
21 views

Solr with SQL Server or NoSQL

I am working on a POC of using Solr with SQL Server. I have a very complex data model with SQL server which required a bunch of joining and scalar functions to strip some mark up and other stuff. ...
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28 views

Would it be good practice to represent MongoDB ObjectId as a String or a Blob type in SQL Lite (RDMS world)?

All: We have a software application with 1) Web-based component 2) Mobile-based component Our 1) Web-based component uses a) MongoDB as the Database b) ASP.NET C# Our 2) Mobile-based component ...
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1answer
74 views

How to efficiently design MongoDB database for Uber-like application?

I'm designing a MongoDB database for an Uber-like application, but since I'm new to NoSQL concept, I have several doubts. I have three main collections - users, requests and messages. User can post a ...
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1answer
9 views

couchbase - multiple buckets or documents with different types

Background Information This is day one for me with couchbase. I've been reviewing the sample databases using the database console that comes with couchbase. Specifically, I've been playing with the ...
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22 views

NoSQL : Getting latest item from DynamoDB table

I'm implementing chat server currently, with dynamoDB. Here is keys from ChatData table Primary partition key : roomNo Primary sort key : seq Chat server, can created many instant rooms, ...
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43 views

mongod.exe has stopped working

I have installed mongoDB 3.2.4 and I am on windows 7 64-bit system. After installation of mongoDB , i have specified dbpath as c:\data and also set the environment variable. Now whenever I am trying ...
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6 views

pattern matching on row attributes

I have the following: there are dozens of millions of records on the following format a1 a2 a3 ..... a10 where ai are float values of some attributes. I would like to store these records in a db ...
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1answer
14 views

“Neo4j” support the data replication between datacenters? [closed]

“Neo4j” support the data replication between datacenters?
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34 views

AS/400 + DB2 to MongoDB?

I'm not seeing a whole lot of info on the subject, so I figured I'd ask people who might know more about it than I do: Is it possible to replicate data from an AS/400 + IBM DB2 instance to MongoDB? If ...
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1answer
86 views

ReplicaSet MongoDB

I'am trying to create replcaSet in MongoDB and I'am facing a problem. This is what I did step by step: 1- I entered this command to create these repertories: mkdir \data\rs1 \data\rs2 \data\rs3 ...
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24 views

How to add an index to attributes sorted on in mongodb

Before you find another reason for changing the category of this question, it was on Stack Overflow and it was described as a DB Admin question, so here goes: I am running a reporting app with ...
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13 views

Is it viable to connect RethinkDB to mssql server

I'm adapting a nodejs project for a client. This project uses RethinkDB as it's database server, obviously NoSQL, it serializes data from Android systems, such as state, battery life, software ...
2
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20 views

InfluxDB - How can i limit the measures that an user can read by their tags?

I have some data that is collected by several sensors. Some users may own many of this sensors. So, i want to keep all the measures in a single database in InfluxDB. To differentiate the sensors i ...
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1answer
70 views

Should I look into alternatives to a relational database? [closed]

I am currently in the process of going through some PHP training with procedural code and will be doing a course in OOP with PHP right after that. The course will provide a solid starting point for me ...
4
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1answer
51 views

Dynamic form builder database optimization Postgresql

Hi I have a project that create forms dynamically I use a model like the following: forms ----- id (PK) name (other fields) form_fields ------------- id (PK) form_id (FK to forms.id) ...
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0answers
15 views

Do all types NoSQL databases have a transaction log?

Do all types NoSQL databases have a transaction log? It seems to me that there should be at least one type that doesn't but I don't know which one.
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2answers
60 views

Document Store & Relational DB Hybrid. Exists? Possible?

Does anyone know of any product or open source project that attempts to strap together Mongo DB and MySQL for instance? I hear a lot about how relational DBs being ACID compliant makes it nearly ...
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1answer
30 views

Google datastore modeling help

I have a very simple requirement. I have an application where users log in, add/remove/view friends, and can send/receive (also view the message you sent and received) a message (message is more like ...
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35 views

Design options for time series scientific data

I've been scratching my head over the last few days trying to find a solution that best suit my needs. I tried to think that what I want is probably not very different from what many others wanted ...
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1answer
25 views

Google Datastore model User and Messages efficently

I have two kinds: USER and MESSAGES. A user can send/receive many messages to/from another user. Thinking in a relational way the relationship would suggest a user can have many messages, and a ...
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28 views

Data Model for a popular/basic type of social app

I am trying to learn about Google Datastore and creating a basic application to have some practical experience with it opposed to just reading the docs. I would like to create a basic social ...
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1answer
78 views

Can SQL Server Change Data capture (CDC) log rows to an external DB?

I have not used SQL Server CDC before, but to my understanding it works like this: business data changes in source DB, e.g. SQL Server CDC has been configured to track certain table/column changes, ...
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33 views

How to use DBRefs to fetch records from multiple collections in MongoDB

I am working on a database for library system. I have a collection called 'books' and another collection called 'publishers'. This is my documents structure in collection 'book'. { "_id" : ...
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1answer
49 views

What database supports over a thousand fields and tables

I have a requirement to store several csv files with several fields in an database. This data does not need to be searchable but i need to query the data by Id. I will also need SQL to query the data ...
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1answer
54 views

From RDBMSs to MongoDB

I've worked exclusively with RDBMSs for the past 10 years and am trying to explore something new to me like MongoDB. I’m trying to learn about data model design in this environment and because ...
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2answers
84 views

Is my db too big for my server? Should I go nosql or stick with relational db management? [closed]

I have a mysql database that is about 22GB in size and has multiple tables with hundreds of thousands of records, my biggest table has 1.8 million records. The Database was not professionally designed ...
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0answers
159 views

Merging time series in influxdb 0.9.x

I have a system which demands monitoring its metrics. In order to do that I use grafana + influxdb. The version of influxdb I currently use is 0.9.x. I want to be able to calculate some statistics. ...
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1answer
88 views

Why are writes failing in MongoDB?

Here is the information about my development environment: Microsoft Visual Studio Community 2015 .NET Framework 4.6 ASP.NET MVC assembly System.Web.Mvc Version=5.2.3.0 MongoDB.Driver 2.0.1.27 ...
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1answer
130 views

Why does MongoDB give me the cannot use 'w' > 1 when a host is not replicated Error message?

Here is the information about my development environment: •Microsoft Visual Studio Community 2015 •.NET Framework 4.6 •ASP.NET MVC assembly System.Web.Mvc Version=5.2.3.0 •MongoDB.Driver 2.0.1.27 ...
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0answers
36 views

Which hosting technology is suitable for large data with limited index

I have a scenario where I have to host very large amount of data in database type solution. The amount of data is very very large. When I try to host it in mysql database the size increases as mysql ...
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0answers
32 views

does solution of Normalilization causes duplicacy in NoSQL?

i am currently using mysql as a database but now i have decided to switch rdbms to nosql probably on mongoDB. i have an doubt that nosql removed the concept of normalization from database so in such ...
2
votes
1answer
199 views

A good use case for Postgres JSONB?

I am looking to create an Asset Management System to track assets (laptops/desktops, monitors, keyboards, mice, bags, software keys, etc), basically anything that can be assigned to an employee. My ...
4
votes
1answer
69 views

What exactly are secondary members acknowledging in replicasets with MongoDB?

I try to understand the mechanics and behavior of MongoDB's replica-features better. I hope to get some insightful information from someone who is familiar with mongo's internals and behaviour. My aim ...
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1answer
65 views

What kind of database should I use?

I'm designing a new system and I'm wondering what kind of DB should I use for my needs. I have a tree structure of nodes, where each node has historic values. For each historic value it should hold 2 ...
8
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2answers
455 views

NoSQL : What is unstructured data?

we are currently running at the edge of resources with our mssql server based solution. We have now many traditional options regarding the next move to tackle the load: buy faster CPUs and IO ...
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0answers
56 views

How to merge numerous collections within one colection in MongoDB?

Here is the scenario: In one collection name is "Parent" I have the following document {"_id" : ObjectId("4f7ee46e08403d063ab0b4f9"), "name" : "MongoDB", "range" : "spec", "notes" : { { ...
0
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1answer
103 views

Based from experience, is dreamfactory better paired with a RDBMS like MySQL or NoSQL like MongoDB

This is our first time to create a data logging web application and we have chosen to use Dreamfactory as the backend framework. We have been used to with MySQL from the past with small amount of data ...
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0answers
51 views

mysql - suggestions for table design with huge number of columns [duplicate]

We have a table that consists of a huge number of columns (usually between 500 to 1000, depends on our clients websites). We are suffering from speed issues due to this, and we're looking for the best ...
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0answers
42 views

MongoDB: Multiple timezone support

In Mongodb how to support multiple timezones? Say every client has his own timezone. I want to group by dates. Records are in different timezones before aggregation. The report should be aggregated ...
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2answers
359 views

MongoDB document delete and fragmentation

I've a MongoDB collection that works like a queue: new documents are insert and old documents (after 60days) are removed. I can see a rapid grown of the datafile size, too rapid. I can be reasonable ...
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0answers
67 views

Can we swap out SQL Server with HBase on our .Net application?

In a current application we use SQL Server. The data flow consists of using TVPs for better-than-bulk-insert performance by passing in DataTables. As part of the data addition process, old records ...
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0answers
20 views

Would a nosql db handle sorting by latitude and longitude queries as well as a mysql db?

I have a table with a couple hundred advertisers including the latitude and longitude of the centroid of their zip code. I will also know the centroid of the zip code of website visitors. What I want ...
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0answers
197 views

Running out of disk space when removing documents error

I'm trying to remove unused document from a production instance of MongoDB but, when I try to execute this query: db.collection.remove( { date: {$lt: new Date((new Date())-1000*60*60*24*90)} } ) ...
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1answer
89 views

How to Query Properties of an Entity in Apache Cassandra

I am new to Apache Cassandra, and I would like to know how to create a table in which I can filter rows by non-key columns. In relational databases, I would simply create a table with an ID as a ...