Are you sure Makobu about Facebook? I think they&#39;ve been using Cassandra @ least for thier Messaging and then moved to HBase. These two scale way more than you can with RDBMs. Others who use such DBs include LinkedIn, Amazon, Google and many others.<br>
<br>Personally, I&#39;ve read about Cassandara and HBase and these are both open and in copmetition. Look at <a href="http://www.roadtofailure.com/2009/10/29/hbase-vs-cassandra-nosql-battle/">http://www.roadtofailure.com/2009/10/29/hbase-vs-cassandra-nosql-battle/</a>.<br>
<br><div class="gmail_quote">On Wed, Dec 15, 2010 at 2:25 PM, Makobu <span dir="ltr">&lt;<a href="mailto:makobu.mwambiriro@gmail.com">makobu.mwambiriro@gmail.com</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
@Patrick, hehe, the joke escapes me too :D<br><br>But yes, different problems require different solutions. <br><br>I find that relational databases preserve data integrity and reduce the code you need to work with them, and provide many other features that enable one to create things that one would otherwise not be able to with a none-relational database.  Case in point, Facebook still uses a relational database, and its one of the hugest apps ever.<br>

<br><div class="gmail_quote"><div class="im">On Wed, Dec 15, 2010 at 10:34 AM, Dennis Kioko <span dir="ltr">&lt;<a href="mailto:dmbuvi@gmail.com" target="_blank">dmbuvi@gmail.com</a>&gt;</span> wrote:<br></div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div class="im">
MongoDB seems to be well supported in Python, other languages and distributions. Appscale (<a href="http://appscale.cs.ucsb.edu/" target="_blank">http://appscale.cs.ucsb.edu/</a>) allows you to implement your own Google App Engine compatible platform and supports <span style="color: rgb(0, 0, 238);"><font style="display: inline ! important;" color="#000000" face="Arial, Helvetica, &#39;Liberation Sans&#39;, sans-serif"><span style="font-size: 14px;"><a href="http://hadoop.apache.org/hbase/" style="display: inline ! important;" target="_blank">HBase</a>, </span></font></span><span style="color: rgb(0, 0, 238);"><font style="display: inline ! important;" color="#000000" face="Arial, Helvetica, &#39;Liberation Sans&#39;, sans-serif"><span style="font-size: 14px;"><a href="http://hadoop.apache.org/hbase/" style="display: inline ! important;" target="_blank">Hypertable</a>, </span></font></span><span style="color: rgb(0, 0, 238);"><font style="display: inline ! important;" color="#000000" face="Arial, Helvetica, &#39;Liberation Sans&#39;, sans-serif"><span style="font-size: 14px;"><a href="http://hadoop.apache.org/hbase/" style="display: inline ! important;" target="_blank">MySQL Cluster</a>, </span></font></span><span style="color: rgb(0, 0, 238);"><font style="display: inline ! important;" color="#000000" face="Arial, Helvetica, &#39;Liberation Sans&#39;, sans-serif"><span style="font-size: 14px;"><a href="http://hadoop.apache.org/hbase/" style="display: inline ! important;" target="_blank">Cassandra</a>, </span></font></span><span style="color: rgb(0, 0, 238);"><font style="display: inline ! important;" color="#000000" face="Arial, Helvetica, &#39;Liberation Sans&#39;, sans-serif"><span style="font-size: 14px;"><a href="http://hadoop.apache.org/hbase/" style="display: inline ! important;" target="_blank">Voldemort</a>, </span></font></span><span style="color: rgb(0, 0, 238);"><font style="display: inline ! important;" color="#000000" face="Arial, Helvetica, &#39;Liberation Sans&#39;, sans-serif"><span style="font-size: 14px;"><a href="http://hadoop.apache.org/hbase/" style="display: inline ! important;" target="_blank">MongoDB</a> ,</span></font></span><span style="color: rgb(0, 0, 238);"><font style="display: inline ! important;" color="#000000" face="Arial, Helvetica, &#39;Liberation Sans&#39;, sans-serif"><span style="font-size: 14px;"><a href="http://hadoop.apache.org/hbase/" style="display: inline ! important;" target="_blank">MemcacheDB</a> as datastores</span></font></span>
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