A programmable database proxy is a smart intermediary that receives requests to access data on your databases, examines and potentially modifies these requests, then forwards them to the DB. This enables developers to implement and deploy complex logic in a more efficient way.
As a result, your proxy database API integration services can operate with more reliable and flexible performance, even when the underlying DB server fails or is experiencing high load. In addition to providing high availability, a database proxy can help protect your data by automatically replaying uncommitted transactions to a new server during database failover or cluster outage.
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In environments with custom sharding strategies, a database proxy can intercept SQL queries from applications and dynamically route them to the appropriate shard. This allows you to add more shards and scale out your database with flexibility, without interrupting the application.
Another way a database proxy can make your applications more resilient is by enabling read/write splitting using proxy addresses. This splits read requests among your read replicas based on weights to improve load distribution and resource utilization. It also helps reduce a database system overload by eliminating unnecessary writes to your database.
Finally, a database proxy can provide DB connection pooling to enable more efficient application-to-database connectivity. This feature allows a DB proxy to establish a long-running pool of backend DB connections and “borrow” one of these connections when a client connection is made, then immediately return it to the pool.