Read reader,
This is first post of my Raik journey. Journey of discovering and crafting Riak database. Riak is an open-source, fault-tolerant key-value NoSQL database written in Erlang. I cannot it describe better than Basho who invented it below.
Basho’s goals for Riak
| Goal | Description |
|---|---|
| Availability | Riak writes to and reads from multiple servers to offer data availability even when hardware or the network itself are experiencing failure conditions |
| Operational simplicity | Easily add new machines to your Riak cluster without incurring a larger operational burden |
| Scalability | Riak automatically distributes data around the cluster and yields a near-linear performance increase as you add capacity |
| Masterless | Your requests are not held hostage to a specific server in the cluster that may or may not be available |
Installation
I choose install from source, before you install make sure you have already installed Xcode, Java and Erlang. Don’t use homebrew installation, in time writing this it has old version 1.4.7 which didn’t work for me. Here is list of commands which I executed:
wget http://s3.amazonaws.com/downloads.basho.com/riak/2.0/2.0.0pre11/riak-2.0.0pre11.tar.gz tar zxvf riak-2.0.0pre11.tar.gz cd riak-2.0.0pre11 make rel
I assume you are install your risk to directory /Users/xyz/riak-2.0.0pre11 and risk libs will be located on path
riak-2.0.0pre11/rel/riak/bin. Please add this path to $PATH file accordingly:
sudo nano /etc/paths
Now we are going to do five minute install describe in risk documentation here.
Go back to path where you installed risk to create five node cluster by following commands:
make all
make devrel DEVNODES=5
for node in `ls`; do $node/bin/riak start; done
for node in `ls`; do $node/bin/riak ping; done
for n in {2..5}; do dev$n/bin/riak-admin cluster join dev1@127.0.0.1; done
Congratulation, you are proud owner or Riak cluster!
Now you can check your cluster plan by riak-admin on any node:
dev1/bin/riak-admin cluster plan
and commit the batch:
dev2/bin/riak-admin cluster commit
Also you can check how well balanced your cluster is by:
dev1/bin/riak-admin member-status
My Intention with Riak
If you thinking about high available and fault-tolerant cluster for computing great amount operations, let’s say I’d love to compute
millions of pattern recognition which database has the best assumptions to achieve this task. I think the Riak is the right one.
Next Steps
I will write basic CRUD operations with languages Erlang and F#.
I hope this is useful for you!
Reference:
Functional Data Science Monkey 