In this section, we will discuss the expectations of log streaming tools in terms of performance, reliability, and scalability. The reliability of the system can be identified by message delivery semantics. There are three types of delivery semantics:
- At most once: Messages are immediately transferred. If the transfer succeeds, the message is never sent out again. However, many failure scenarios can cause lost messages.
- At least once: Each message is delivered at least once. In failure cases, messages may be delivered twice.
- Exactly once: Each message is delivered once and only once.
Performance consists of I/O, CPU, and RAM usage and impact. By definition, scalability is the capability of a system, network, or process to handle a growing amount of work, or its potential to be enlarged in order to accommodate...
