Category Archives: NoSQL

“Synchronous” MongoDB Calls with Fibers

Posted on 2013/05/15 by rp8

Here I’m showing an example of converting MongoDB node driver into “synchronous” APIs from callback based asynchronous APIs. We define two new classes to wrap up the native Db and Cursor. Two methods are converted: Db.Open and Cursor.toArray. The “sync” … Continue reading →

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MongoDB Test2

Posted on 2013/04/29 by rp8

Using a two-core server generating enough traffics and achived over 8000 ticks/s. mongod runs 65% CPU time.

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MongoDB Test 1

Posted on 2013/04/25 by rp8

Simple test in simulated ticks: single node process had throughput of 2394 ticks per second. mongod runs at 44% CPU usage.

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MongoDB Build

Posted on 2013/04/24 by rp8

Spent a few hours building a simple MongoDB cluster with Digital Ocean VPS. Three nodes: Primary, Secondary and Arbiter. Primary node is located in New York and Secondary node is in San Francisco. Arbiter is also in New York leveraging … Continue reading →

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Reset CouchDB Instance

Posted on 2012/10/16 by rp8

It’s really easy to clean up a CouchDB instance as fresh as new. Just delete the database files and .delete folder in /usr/local/var/lib/couchdb and restart the CouchDB service. $ sudo /etc/init.d/couchdb stop $ cd /usr/local/var/lib/couchdb $ sudo rm -rf * … Continue reading →

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Riak vs CouchBase

Posted on 2012/10/05 by rp8

CouchBase 2.0 went beta last month. Here`s a very comprehensive comparison between the two.

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Testing views in couchdb with curl

Posted on 2012/09/02 by rp8

Couchdb has REST APIs and it works well with curl. Let’s build a contact database in Futon with following: Documents {"_id": "bill", "name": "bill", "groups": ["friends"], "type": "contact"} {"_id": "john", "name": "john", "groups": ["friends", "coworkers"], "type": "contact"} {"_id": "111-222-3333", "phone": … Continue reading →

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