Solution: Schema Separation" title="Direct link to The Solution: Schema Separation">​</a></h2>
<p>We introduced the concept of Feature Groups—logical groupings of features that must remain consistent with one another.
To represent these groups efficiently, we adopted a layered storage approach:</p>
<ul>
<li><strong>Feature Labels (Keys)</strong> were stored in ZooKeeper, serving as the schema.</li>
<li><strong>Feature Values</strong> were stored as a comma-separated string array in Cassandra or Redis.</