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Questions tagged [riak]

Riak is a key/value data store written in Erlang. It implements principles from Amazon's Dynamo paper.

Riak is a NoSQL database implementing the principles from Amazon's Dynamo paper. Riak is designed to deliver maximum data availability by distributing data across multiple servers. As long as your Riak client can reach one Riak server, it should be able to write data.

While Riak is typically known as an eventually consistent system, beginning with version 2.0 it can be used either as an eventually or strongly consistent system, and these two approaches can be mixed and matched in a single cluster.

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ORM lirbary for Riak on Node.js

Can anyone recommend a library that provides an ORM-like framework for Riak/Node.js that is similar to Mongoose for MongoDB? I've checked out Riak-js (http://riakjs.org/) but it doesn't seem to provide a way to define a model like the following: var…
Cliff F
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How do I deploy Riak on dotCloud?

How do I get a riak service started on dotcloud? I tried: data: riak It says the service is unrecognized.
kthakore
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Multi-row atomicity-consistency with Riak?

Let me get to my example: For the ID=>values 0=>87, 1=>24, 2=>82, 3=>123, 4=>34, 5=>61, increment all values for keys between 1 and 4 by 10 For a multi-row operation like this, does Riak offer atomicity; ie this operation either fails or…
Jesvin Jose
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Migrate Data from one Riak cluster to another

I have a situation where we need to migrate data from one Riak cluster to another and then remove the old cluster. The ring size will be same, even the region will be the same. We need to do this to upgrade the instances to AL2. Is there a clean…
WordsWorth
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NoSQL architecture for app like Google Reader

What NoSQL architecture would you use for application like Google Reader (one to one copy)? I consider MongoDB, Cassandra, CouchDB, Redis, HBase and Riak.
elniño
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Difference between different type of Key Valye Databases

My question may be very broad but I really need to ask this. I am planning to use a Key Value NoSQL Database and I am completely new in NoSQL world. I was going through Wikipedia Page https://en.wikipedia.org/wiki/Key-value_database As per Wiki KV…
GD_Java
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RIAK high diskspace usage

I am evaluating RIAK kV V2.1.1 on a local desktop using java client and a little customised version of the sample code And my concern is I found it to be taking almost 920bytes per KV. That's too steep. The data dir was 93 mb for 100k kvs and kept…
Kedar Parikh
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Java mapreduce and search for Riak

I saw the examples for Riak erlang and JS mapreduce. But I am a JAVA guy :), like to do it in JAVA. Moreover JS mapreduce is deprecated. Is there a way to do it in Java? Kindly give a sample. I was also looking for a Java sample of Riak 2.0 Search.…
Raghuveer
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How to make existing data indexed by newly created index

I have created a new solr schema. I have created a new index from new schema. I have an existing bucket type where data exists. How will the existing data can be indexed with the new index created?
Jubin Juneja
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Riak CS - Unable to create/view bucket details using dragon disk

I installed Riak 2.0.5, Riak-cs 2.0.1(AWS VM) and trying to access it from Dragon disk. I ran s3cmd --configure and set the access/secret key. But unable to view Riak bucket details in Dragon Disk using access/secret key. I'm able to view/post data…
user5380795
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How does Riak nodes distribute data

We have a single production node of riak for our game. We would like to backup our database constantly, so we decided to start up some other nodes. We're trying to use AWS free tier. What we see is that some parts of data just moved to second node,…
iluh
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RIAK database and ACID

Can you please help me in these questions: Is the write operation in RIAK atomic? Is the write operation durable? How is concurrent write handled? Does RIAK support transactions? Thank you
user3341697
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Can't get Erlang based Riak to work under Ubuntu 9

I have been unable to get Riak working under Ubuntu 9 due to many problems. I tried following the current blog: http://onerlang.blogspot.com/2009/10/fighting-with-riak.html : but still Riak is not working. Has anyone else had problems with Riak on…
yazz.com
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Best way to run a delayed job in browser

I have to develop an API which does some map reduce jobs in the background and then return the results. Its a sinatra application with a Riak No-sql database. The issue is that the job takes around 5-10 minutes to run. And the request times out in…
Infant Dev
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Delete bunch records by 2i at once in Riak

I found one quote here: https://stackoverflow.com/a/13001495/1539017 Perform a 2i query to get list of message keys for the user, feed that list to a Map/Reduce job to delete the objects. Does it really possible? Any example exists?
Alexander Popov
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