opener noreferrer">More about IOP DAG</a></u>
<h3 class="anchor anchorWithStickyNavbar_LWe7" id="2-online-feature-store---0th-version">2. Online Feature Store - 0th Version<a href="#2-online-feature-store---0th-version" class="hash-link" aria-label="Direct link to 2. Online Feature Store - 0th Version" title="Direct link to 2. Online Feature Store - 0th Version">​</a></h3>
<ul>
<li>Used <strong>Cassandra</strong> and <strong>Redis</strong> for low-latency feature serving.</li>
<li>Maintained feature consi