Why only grpc to send trace data, not http?

[lijial]

Hi SkyWalking team

As I choose SkyWalking to trace, Some question confuse me

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Question

In v5.0.0-beta2 , there is embed jetty, javaagent could send tracedata to collector use http
In v6.0.0-GA and later versions, there is only grpc .
Why remove jetty/http?
Is the reason only grpc performance better?
Now can I use http to send tracedata? is there any worse situation from http?

[wu-sheng]

Why remove jetty/http?

You are not following the latest, it is back, but we only recommend for the languages don't support grpc.

Is the reason only grpc performance better?

Yes, much much better than JSON based HTTP.

Now can I use http to send tracedata? is there any worse situation from HTTP?

Send, I don't know, that depends on the agent or SDK. As OAP server, we support that.

[lijial]

@wu-sheng

Now can I use http to send tracedata? is there any worse situation from HTTP?
Deal wu-sheng, Thanks for your reply , as this question I should not understand your answer,
As I use 8.4.0 , I can use http? And you support to use http?
Are there still several kind of agent ?
As I only know only one agent and OAP server...

[kezhenxu94]

@lijial if you mean to send the data in Java agent with HTTP, it's not supported, for Java agent, we only support gRPC.

The OAP backend can receive HTTP data because some languages are hard to use gRPC, Nginx Lua for example

[lijial]

@wu-sheng

@lijial if you mean to send the data in Java agent with HTTP, it's not supported, for Java agent, we only support gRPC.

The OAP backend can receive HTTP data because some languages are hard to use gRPC, Nginx Lua for example

OK，this is what I wanna know. And 8.4.0 version not support javaagent using HTTP either?

[wu-sheng]

I think that would be never due to no reason to do this.

[lijial]

I think that would be never due to no reason to do this.

As our company use skywalking but grpc not stable in some situation. So I wanna change the grpc to http.
If it's just performance, and our flow is low as 10k/s.
Should I change the agent to use http?
Is it necessary for safety and stability for me to do so？

[wu-sheng]

I don't know what do you mean grpc is not stable. But from my understanding, it is really widely adopted. You could change the codes by yourself, for stability, that depends on your codes only.

[lijial]

I don't know what do you mean grpc is not stable. But from my understanding, it is really widely adopted. You could change the codes by yourself, for stability, that depends on your codes only.

OK，I know, thankyou
And is there SPI interface in javaagent, Easy for me to extend data transmission using http?

[wu-sheng]

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