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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Redis takes up all the Memory and Crashes

A redis server v2.8.4 is running on a Ubuntu 14.04 VPS with 8 GB RAM and 16 GB swap space (on SSDs). However htop shows that redis alone is taking up 22.4 G of memory! redis-server eventually crashed ...
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1answer
115 views

Database Design for NoSQL Fantasy Baseball League

I am trying to create a proper schema to place scraped data into, using a MongoDB database. Currently it looks like Team { id : id, name : String, teamLink : String, username : ...
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1answer
19 views

Best practices for relating NoSQL data to RDMBS

I am looking to use both a NoSQL solution (Redis, Mongo, etc) with a mySQL/Laravel application. My reasons for this is that I need a schemaless key value storage to go with my relational data. I could ...
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1answer
21 views

Keeping rows ordered by counter value

I'm storing linked words in a Cassandra v2 cluster and I'm having a hard time doing efficient reads. I'm trying to fetch the top X rows with the highest counter value. Cassandra doesn't store the ...
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1answer
20 views

How should I implement logs into a document store db?

I am somewhat unsure if I want to use document store(noSQL) for the sake of using it or because it could really help in my situation. Here is my problem, I have users, I can think about them as ...
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1answer
17 views

View collation are incomplete joins in couchdb

I was trying to create view collations following this tutorial: http://elegantcode.com/2012/02/14/view-collation-in-couchdb/ but I realize that the result was an array with 5 elements with 2 objects ...
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1answer
40 views

Is using a relational DB for storing votes and (accessed resources) overkill?

I am writing a forum component for a site and would like to keep track of what topics/questions a user accesses so that other topics/questions can be recommended based on said users previous choices. ...
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1answer
346 views

Storing multidimensional array in MongoDB

I am attempting to convert a large MySQL database of product information (dimensions, specifications, etc) to MongoDB for flexibility and to move away from the restriction of a column based table. I ...
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1answer
32 views

Disable MongoDB journaling?

Are there any benefits in disabling mongodb journaling besides performance gain? I know journaling provides write durability and crash resiliency. But I can tune syncdelay parameter to make data files ...
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0answers
80 views

Should I use SQL Azure to store product descriptions and links to images in Azure Blob

For an html/Css/JQuery public Azure website to be coded using Zurb Foundation html5 responsive framework, I'd like to use SQL Azure (web edition) to store product descriptions and links to images that ...
2
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0answers
213 views

Strugling with updating a cassandra row in FluentCassandra

I have this problem with using Fluent Cassandra in a test application. All I want to do is set the IsOnline field to true inside the SignIn method, but I keep getting the exception supercolumn ...
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0answers
48 views

Relational or non-relational database for a system to pass objects on?

hopefully this is the right place to ask this kind of question. I am working on a system that focuses on helping people give away things that they don't use anymore. So, an object typically has the ...
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0answers
92 views

Best database for fast read all in one table

I currently have a large database in SQLite that I was using for rapid-prototyping for a software I am working on. Now that I am planning to move it to another database that should give better ...
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0answers
58 views

Why NOSql should be more performant than RDBMS under structured data loads?

The main reason NoSQL dbms have become so common is the need of storing unstructured data where a Relational database instead would require carefully designing a database schema and fitting data into ...
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0answers
42 views

Dealing with null values in non-nullable columns in a NoSQL database

If I have an existing table in a NoSQL database cluster and I want to add a new column that should never return null, how do I handle it in my application code? I can update all exist records and ...
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0answers
76 views

Can XML columns in Oracle/MS SQL Server replace document oriented databases to some extent?

Just a strategic question: I am currently working with frequently changing data schemas and it takes a lot to keep track of versions and specific content. I do, however, have a classic OLTP ...
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0answers
287 views

Data replication between SQL server 2008 R2 and other NOSQL DB (ML, MongoDB)

I'm a newbie in RDBMs and I have the question regarding replication between SQL Server (Oracle in future) and NOSQL MarkLogic server (ML). There are two servers: Machine with SQL server 2008 R2 ...
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0answers
164 views

Store large hierarchy in NoSQL each day and compare

I'm in the process of creating a utility that stores a fairly large hierarchy into a NoSQL document. The data of this is similar to an Active Directory / LDAP structure which contains sub groupings, ...
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0answers
116 views

Real Time data collection - Help select Database

My Scenario: I want to collect data from various sensors[for now I have 600 sensors sending data, but this may have to scale up to 3000 more data sensors, all sensors send real time data] Now I have ...
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0answers
48 views

Any suggestions on having master-master replications around the world by nosql solutions?

I would like to set up databases that are put at different data centres around the world. For this, I think some nosql solutions may suit the case. For example, couchdb, maybe. Eventual consistency is ...
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0answers
10 views

Architecture for huge catalog of products

I need to upgrade my current system of product catalog. For currently I have a 12 000 items in catalog, it's not a lot, but I need to improve them for feature. I have a task to reorganize my database ...
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0answers
8 views

Cassandra cluster on Windows Machine

I am new to Cassandra, and have been trying to create a cluster using DevOps. When I add a node , I get the following error: Error provisioning cluster: Unable to SSH to some of the hosts ...
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0answers
29 views

noSQL for log/stats database

I'm trying to determine whether pursuing (learning,testing and implementing) a noSQL (CouchDB) to store and process log information. The log depending on the type of event has varying number of ...
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46 views

Collection VS lots of Fields

As of the moment we are having this collections RptCustomer RptCustomerMonthly RptCustomerDaily RptStoreCustomer RptStoreCustomerMonthly RptStroreCustomerDaily RptFranchise ...
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0answers
10 views

Are rfiles in Accumulo and hfiles in Hbase similar in structure and purpose?

I cannot seem to find much info on rfiles other than the Accumulo site and from what I can gather from the information I cannot deduce whether like hfiles they are based on Mapfiles and meant to store ...
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0answers
89 views

Elasticsearch: Versioning a document on revisions

I currently have a document which gets revised regularly, I want to keep track of the document by keeping each old version of the document. So if document A has a summary and update date I want to, ...
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74 views

show database command doesn't show databases

I've made the following configuration options logpath=D:\mongodb\log\mongo.log logappend=true dbpath=D:\data\db directoryperdb=true port=64623 # [mo]ngodb maxConns=100 objcheck=true cpu=true # ...
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37 views

Riaks Bitcask- Why high throughput?

In the Riak docs I have read: High throughput, especially when writing an incoming stream of random items Because the data being written doesn't need to be ordered on disk and because the log ...
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0answers
78 views

Mongoose: Using limit operator with subdocs match a condition

I have a Schema like this in Mongoose: var Schema = require('mongoose').Schema; var ActivitySchema = new Schema({ is_hidden : { type: Boolean, required: true, default: false }, post : ...
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49 views

how to design my database for faster reads for my situation

I have a situation where i have two categories. Lets say type A and type B. In my database I have some 50,000 type A entries and 100,000 type B entries as of now. For each entry mentioned above(type ...
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188 views

Two-phase commit in MongoDB

I read the online document here and for hours of researching and trying things out I still have a question need explanation. The documentation says that there are two classes of failures, which for ...
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0answers
201 views

Use cases for NoSQL databases: Time series

I need to set up a database that will record temporal series data (sensors). A friend of mine has recommended me to use a NoSQL database instead of using Oracle (for instance). There're also some ...
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0answers
108 views

Database (open source) for complex queries (for analytics) like these:

In an app, I'll be storing information about events, specifically, session_id url time type data: foo: bar bar: foo The data will basically be a hashmap (need to support arbitrary types / names ...