What is Amazon Route 53's default TTL for DNS records? How does adjusting the TTL impact the performance and cost of a service?
Amazon Route 53’s default TTL for DNS records is 300 seconds. Adjusting the TTL impacts performance and cost in several ways:
A lower TTL value ensures faster propagation of changes, providing quicker updates to clients but increases query volume, leading to higher costs. It also puts more load on the authoritative DNS servers.
A higher TTL value reduces the frequency of queries, lowering costs and decreasing server load. However, it may result in slower propagation of changes, causing outdated information to be served to clients longer.
Balancing these factors is crucial for optimizing performance and cost-effectiveness.
