Use CouchDB for Document Based Data Storage on Fedora 14
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CouchDB is a non-relational, document based database. Like other entrants into the “NoSQL” field, CouchDB attempts to provide a more flexible data storage system for use in custom application development. CouchDB is written in the Erlang programing language which supports an innovative concurrency model. While CouchDB does not use an SQL interface, it uses an HTTP interface and JSON as a data format for easy integration in application development.
Before proceeding with the installation of CouchDB, make sure your package repositories and installed programs are up to date by issuing the following command:
To install CouchDB and all of its dependencies, issue the following command:
yum install couchdb
To start CouchDB, use the “init script” located at
/etc/init.d/couchdb. Issue the following commands to start CouchDB:
Later, if you need to restart or stop CouchDB you can use the following commands to accomplish these functions:
/etc/init.d/couchdb restart /etc/init.d/couchdb stop
To ensure that CouchDB starts following the next system reboot, issue the following command:
chkconfig couchdb on
Congratulations! In most cases, you will not need to modify CouchDB’s configuration file. However, should you need to modify any of its settings, a number of options are set in the
Most of your interaction with CouchDB will occur by way of the system’s HTTP and JSON interface. CouchDB comes with a web-based administrative interface called “Futon”. Since CouchDB is only accessible over the local interface by default, you will want to create a secure ssh tunnel in order to access CouchDB or Futon from your local machine to avoid sending data in the clear.
Once the SSH tunnel is in place or you have configured your Linode, you can access the CouchDB HTTP interface by making a request for
http://localhost:5984. For a simple command-line HTTP client consider installing
curl. You can test your CouchDB instance by issuing the following command:
In response, CouchDB will return the following:
With the SSH tunnel active, you can access the Futon interface by visiting the URL
http://localhost:5984/_utils/ in a web browser on your local system.
couchjs command in your terminal by issuing a command in the following form:
You may wish to consult the following resources for additional information on this topic. While these are provided in the hope that they will be useful, please note that we cannot vouch for the accuracy or timeliness of externally hosted materials.
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