Redis is a popular modern database option that has aided in creating over 50,000 databases for its 2,500 paying customers, with more than 100 new databases created daily. It is widely used in various industries such as social applications, online advertising companies, and gaming companies. However, running Redis in the cloud can cause performance degradation due to its fast response times, which require multiple instances to be incorporated into a cluster to enable pure multi-tenancy architecture without degraded performance. To address this challenge, users need to consider data center selection carefully to avoid network latency, and instance selection should not be limited by predefined sizes, allowing flexibility in terms of size and type. Additionally, data persistence is crucial for high-performance applications like those running 1 million operations per second, which can be achieved through hybridizing ephemeral storage with EBS infrastructure. Monitoring is also essential, where tools like Zabbix and Limbic are used to monitor nodes and database metrics respectively. A strong DevOps team plays a crucial role in handling complex infrastructures, using a 'baby steps' approach to move from manual configuration to automation.