
Learn how your application intelligently routes requests to the right database shard without users ever knowing.
Here's where the magic happens - your API server becomes like a smart traffic controller that knows exactly where every piece of data lives!
The Routing Logic:
function getShardForUser(userId) {
if (userId >= 1 && userId <= 500000) {
return 'shard-1.<TopicPreview slug="database">database</TopicPreview>.com';
} else if (userId >= 500001 && userId <= 1000000) {
return 'shard-2.database.com';
}
}
const userShard = getShardForUser(userId);
const userData = await userShard.query('SELECT * FROM users WHERE id = ?', [userId]);
The Beautiful Transparency: Users have no idea their data might be in California while their friend's data is in New York. Your API handles all the complexity!
Magic: If one shard gets too hot, you can move partitions around:
Key Insight: "Your API server becomes the intelligent middleman that makes multiple databases look like one seamless system to your users."
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