How to render the Span data by nanoseconds?

[TheodoreG]

Hey guys, I pass some traces data with timestamp in nanoseconds to Jaeger server and got like this

It seems like the server render the bar by converting nanoseconds to microseconds.
Is there any way to show those bars by nanoseconds?
Thanks very much!

[dosubot[bot]]

Hey @TheodoreG! I'm here to help you with any bugs, questions, or contributions. Let's tackle this together!

To render the Span data by nanoseconds in Jaeger, you need to modify the transformSpan function in the domainToJaegerTransformer struct to use nanoseconds instead of microseconds for the StartTime and Duration fields.

Here is the modified code:

func (d domainToJaegerTransformer) transformSpan(span *model.Span) *jaeger.Span {
    tags := d.convertKeyValuesToTags(span.Tags)
    logs := d.convertLogs(span.Logs)
    refs := d.convertSpanRefs(span.References)

    jaegerSpan := &jaeger.Span{
        TraceIdLow:    int64(span.TraceID.Low),
        TraceIdHigh:   int64(span.TraceID.High),
        SpanId:        int64(span.SpanID),
        ParentSpanId:  int64(span.ParentSpanID()),
        OperationName: span.OperationName,
        References:    refs,
        Flags:         int32(span.Flags),
        StartTime:     span.StartTime.UnixNano(), // Use nanoseconds
        Duration:      span.Duration.Nanoseconds(), // Use nanoseconds
        Tags:          tags,
        Logs:          logs,
    }
    return jaegerSpan
}

In this modification:

• span.StartTime.UnixNano() is used to get the start time in nanoseconds.
• span.Duration.Nanoseconds() is used to get the duration in nanoseconds ^[1].

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[yurishkuro]

Jaeger internally (i.e. in the database) only keeps microsecond precision.

[TheodoreG]

Ok, thanks very much.