How do you order logs? For example, a log entry, in this context, what does 'right‑after logs' mean? How would you ensure correct ordering of log events?

Ordering logs is critical for debugging and for building a reliable audit trail. In a distributed system, each log entry should carry a monotonically increasing sequence number or a timestamp with sufficient precision. If you can’t rely on wall‑clock time, use logical clocks such as Lamport timestamps or vector clocks to capture causal ordering. For example, a log entry might include a 'log_id' and a 'prev_log_id' to link events. When you say 'right‑after logs', you’re referring to the immediate successor in the event stream; you can enforce this by writing logs to a single partition or by using a transactional log service that guarantees order. In practice, you would store logs in a system like Kafka or a distributed log store, configure the producer to use a single key so all messages go to the same partition, and consume them in order. If ordering is lost, you can replay logs using the sequence numbers to reconstruct the correct order.