A Stack probe is a probe that decodes of messages, timestamps, maps, detects anomalies, and generates pre-aggregated stats. It then sends the decoded message, anomalies, and pre-aggregated stats to the Agent service in VMX-Analysis and to a Core Data Feed.
Stack probes provide data for analytics in VMX-Analysis and capture the following types of information:
Data about business objects (transmitted as Agent Events) For example, data relating to a quote, order, fill, heartbeat.
Latency stats For example, Market Data wiretime, TCP roundtrip.
Network stats For example, bandwidth per link, microbursts per port, loss, window size etc.
To configure a Stack probe, you’ll define a Berkeley Packet Filter (BPF) filter to determine what the probe will listen for. This will be packet-level data such as packet headers, TCP ports, or protocol types. Then you’ll set the data that will be passed to VMX-Analysis.