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

learn more… | top users | synonyms

0
votes
0answers
7 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 ...
0
votes
3answers
149 views
+100

Heterogeneous ordered list of value

I have the following object model: class A { List<Thing> orderedListOfThings; } interface Thing { } class X implements Thing { int attr; } class Y implements Thing { String ...
0
votes
0answers
11 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 ...
0
votes
0answers
24 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 ...
0
votes
1answer
32 views

SQL or NoSQL for structured clinical data [closed]

I'm designing a database for a primary health center, the idea We basically have a Patient with many Encounters, also the Encounters have to be entered from different Users (Health Professionals). ...
1
vote
1answer
43 views

Data modeling with many attributes where few apply to each record [closed]

I'm pretty new to data modeling, so please excuse me if I've missed something obvious. I'm trying to decide on a schema (or possibly a DBMS) to work with some data where there are quite a few possible ...
0
votes
1answer
7 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 ...
0
votes
1answer
13 views

Collate view with old record on couchdb

I need to create a collate view with couch db but I dont want to use the current records, I want to use records of a specific revision. For example, lets imagine that I have an invoice with an array ...
0
votes
1answer
35 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. ...
1
vote
0answers
14 views

Checking records consistency after mongorestore --noobjcheck

I had an HDD malfunction on a Mongo node. After running fsck and mongod --repair I was able to dump the needed collection with mongodump and move it to another server. However, some records appear ...
0
votes
4answers
62 views

Use SQL or NoSQL? [closed]

I'm designing a system that checks a given website for any security vulnerabilities. The system includes a client (firefox plugin) and a server. The server does all the scanning while the client just ...
1
vote
0answers
41 views

Advice to choose the best tool [closed]

We have some kind of a high-load system. Currently, we're using Postgres on RAM disk (you know all the pros and cons). There are around 10 millions of rows. There's only 1 external key, and these 2 ...
1
vote
0answers
74 views

How do you think in NoSQL? [closed]

I'm from the pre-nosql era and am rather comfortable with SQL. However, I cringe whenever someone suggests using a NoSQL database for the "upcoming" project. There are some major problems that I'm ...
-1
votes
0answers
20 views

Minimal db structure for multiple parents and multiple children nesting

I stuck trying to do regular category nesting with noSQL db like parent -> child -> child but in one table. DB engine is parse.com so i got pointer and relation as db relation options. what ...
0
votes
1answer
35 views

Maximum number of fields/columns in MongoDB

I'm considering learning and using MongoDB for a project, but I'm going to need to be able to store at least 1024 columns for the first part, and as many as 1048577 for the second. Does MongoDB have a ...
0
votes
1answer
108 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 ...
0
votes
0answers
41 views

Collection VS lots of Fields

As of the moment we are having this collections RptCustomer RptCustomerMonthly RptCustomerDaily RptStoreCustomer RptStoreCustomerMonthly RptStroreCustomerDaily RptFranchise ...
0
votes
1answer
45 views

Deleting aerospike bins

I have an Aerospike instance and I messed up one of my namespaces. I didn't know there was a ~32k limit on bins, so i wrote unique bin names into my namespace. I hit that 32k limit, and now my whole ...
1
vote
0answers
77 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 ...
1
vote
1answer
98 views

What mongodb database layout would fit better

I'm currently writing an application using the MEAN stack, pretty much only for fun and because MEAN is "cool" at the moment. Therefore I'm thinking about the database layout. The data needed to be ...
1
vote
1answer
93 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 : ...
0
votes
0answers
8 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 ...
0
votes
1answer
20 views

On my local computer, where is the data stored for a search on a dynamodb database

I am using RazorSQL to access a dynamodb database in a "SQL"-like way. One of the things RazorSQL lets you do is the sql command select * from table where ... on all columns. This is significant ...
0
votes
1answer
168 views

How can I Automate MongoDB schema design from existing MySQL Database and Logs?

I am working on the project which will automatically generate sample MongoDB schema analyzing existing MySQL database and logs. I am looking for help regarding the below questions. Please, share your ...
0
votes
2answers
309 views

Is there any open source GUI tool to monitor cassandra? [closed]

I would like to monitor cassandra database as well as need to check the values in the database. Could any one suggest me best open source GUI tool ? Regards, Arun Raj.
0
votes
0answers
43 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, ...
3
votes
1answer
632 views

What is a good way to copy data from one Cassandra ColumnFamily to another on the same Keyspace (like SQL's INSERT INTO)?

Trying to find a way to easily transfer all the rows from a Cassandra ColumnFamily/Table to another. The COPY command, as I understand, is a good option. However, as it dumps all the data to .csv on ...
0
votes
1answer
47 views

Terminology No-SQL Database [closed]

I'm looking for a good explanation of terminology for No-SQL. I have some colleagues that won't get the point, and for the sake of advancing i need to have definitions of the names.. Though this seems ...
1
vote
1answer
115 views

Can anyone offer an opinion on handlersocket vs memcached performance in MySQL 5.6

I must say I was a little mis(un)-informed about the MySQL Memcached plugin which offers the same NoSQL like access to InnoDB tables as HandlerSocket, I had only had experience with entirely ...
0
votes
0answers
59 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 # ...
0
votes
1answer
27 views

Line Comment in MongoDB config file

How to mark a line comment in mongodb configuration file? cpu=true #temporary for dev env Is this the right way? There is no clue about it in their website page about setting the configuration ...
0
votes
0answers
35 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 ...
0
votes
0answers
58 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 : ...
0
votes
1answer
308 views

~2 Billion row fact table in star schema on Oracle. Advisable? [closed]

Let me start with: I am not a DBA; I am a backend developer. It has been suggested that, for a report schema, I implement a star schema where-in the fact table can have ~2B rows before being ...
1
vote
0answers
55 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 ...
1
vote
0answers
37 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 ...
0
votes
0answers
46 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 ...
0
votes
0answers
144 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 ...
1
vote
0answers
72 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 ...
1
vote
1answer
223 views

Design DB for users with different information fields?

Let's say I want to register all faculty of a university and they are in different fields and have different resume information. Here we have some common fields and some field specific fields. for ...
0
votes
1answer
228 views

Accumulo table design methodology

I am just getting started with Accumulo and NoSQL databases and I am looking for some discussion on table design. I get the key value structure that is seen in the manual. However, if I am trying to ...
1
vote
1answer
78 views

Use Database to Store Data Extracted From Internet

I'm mining 500 million users, and their "followers" from a social network using their API. The extraction of data itself is not a problem, since I can do it with my scripts. However having 500 million ...
0
votes
1answer
68 views

Two types of data, so two type of databases?

For a social network site, I need to propose a DB. The application is written in Java & will be hosted on VPS(s) initially. Broadly classified there is two type of data to be stored at backend: ...
2
votes
1answer
263 views

What database and setup can handle several million inserts per minute? [closed]

We have come to a point where for a few of our customers' systems, at peak times, events are generated at that crazy rate. That is, millions of new events per minute (between 1M and 2M). The ...
0
votes
1answer
75 views

Is PostgreSQL appropriate for processing this large but simple dataset? [closed]

I have a dataset I'm not sure how to store. The structure is simple: 30 numeric attributes identified by about 15 billion x, y, and t values. We're expecting ~17k t values and maybe 90k x/y ...
5
votes
1answer
403 views

Full text search through many tables in MySQL

We have high traffic NEWS websites, I want to add a feature that every user can search through over all content of site, such as news, polls, comments, galleries,etc . Each of contents type has its ...
0
votes
1answer
244 views

difference between MySQL and noSQL databases [duplicate]

All these days I've been using MySQL, recently I saw a kind of similar named Database NoSQL. What is NoSQL and what is the difference between them ?
1
vote
0answers
238 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 ...
3
votes
2answers
171 views

Scalability: Desiging a message table

This question might be deadly simple but I wanted to make sure I am going through the correct path and not making any simple and irrevertible mistakes. My project will be based on messaging and it ...
1
vote
1answer
115 views

MongoDB service not starting on RedHat - missing 'service_uri'

I'm on a Red Hat Enterprise Linux Client release 5.4 (Tikanga) machine I created my /etc/yum.repos.d/10gen.repo like this: [10gen] name=10gen Repository ...