What approaches would you take to ensure data quality and consistency in a distributed data store used by multiple microservices? Outline the techniques you'd apply and their potential impact on system performance.

Employ data validation at service boundaries combined with eventual consistency patterns and data replication strategies to ensure high availability and reliability. Scenario Pressure: What challenges might arise from asynchronous data replication? Depth Trigger: Discuss the impact of these strategies on read/write performance and overall system scalability.