Dear Skywalking Dev Team,
I have a question about the service instance and did not find answer in docs, so have to email here for your help. Let's take the case in the discussion https://github.com/apache/skywalking/issues/3829 as example, does the "service instance" stand for the instance on which the service is deployed "physically", or it is a dummy terminology in Skywalking does not match the "physical" instances? I.e. Does it means the Service A is deployed to 3 VM instances and Service B is deployed to 2 VM instances, or there is NO guarantee of this? If yes, does it require the DevOps team to maintain sequence number of the deployed instances for Skywalking? Or Skywalking can get and maintain the instance sequence itself, no need the extra work for DevOps team? Also imagining the Instance 2 of Service A was kicked out automatically due to a serious issue, and registered back again after is was fixed. In such case if the sequence is still "Instance 2", or it will be assigned a new sequence like "Instance 4"? Much appreciate, Patrick
