<p dir="ltr"><a href="https://eng.uber.com/mezzanine-migration/">https://eng.uber.com/mezzanine-migration/</a></p>
<p dir="ltr">"<b>Lessons Learned</b></p>
<p dir="ltr"><b>Use </b><b>UUIDs</b>: <i>Always use </i><i>UUIDs</i><i> for everything.</i> If you start out with integer IDs and you experience large growth, it’s a lot of tedious work to undo it."</p>