CensusServerStatsEncoding.md

Census Server Stats

The encoding is based on BinaryEncoding

Fields added in Census Server Stats version 0

LB-Latency-Ns

• optional
• field_id = 0
• len = 8

Request processing latency observed on Load Balance. The unit is nanoseconds. It is int64 little endian.

Server-Latency_Ns

• optional
• field_id = 1
• len = 8

Request processing latency observed on Server. The unit is nanoseconds. It is int64 little endian.

Trace-Options

• optional
• field_id = 2
• len = 1

It is a 1-byte representing a 8-bit unsigned integer. The least significant bit provides if the request was sampled on the server or not (1= sampled, 0= not sampled).

The behavior of other bits is currently undefined.

Valid example (Hex)

{0, 0, 38, C7, 0, 0, 0, 0, 0, 0, 1, 50, C3, 0, 0, 0, 0, 0, 0, 2, 1}

This corresponds to:

• lb_latency_ns = 51000 (0x000000000000C738)
• server_latency_ns = 50000 (0x000000000000C350)
• trace_options = 1 (0x01)