kcat:tldr:9e356

The command you provided is using the kcat tool with some arguments. kcat is a command-line utility that is part of the librdkafka package, which is a C/C++ library implementation of the Apache Kafka protocol.

Here is the breakdown of the command:

• kcat: This is the command itself, invoking the kcat tool from the command line.
• -Q: This flag stands for "quick mode". Enabling this flag makes kcat produce messages quickly by skipping some default configurations like message compression, validation, and buffering.
• -t ${topic}:${partition}:${unix_timestamp}: This argument specifies the topic, partition, and the Unix timestamp for consuming messages from Kafka. Here, ${topic} is a placeholder for the actual topic name, ${partition} is a placeholder for the partition number, and ${unix_timestamp} is a placeholder for the Unix timestamp.
• -b ${brokers}: This argument specifies the Kafka broker(s) to connect with. Here, ${brokers} is a placeholder for the actual broker address(es).

To summarize, the command is using kcat in quick mode to consume messages from a specified topic, partition, and Unix timestamp, connecting to the specified Kafka broker(s).