Add a parameter that controls the number of StreamLoad tasks committed per partition #92

[baishaoisde]

Add a parameter that controls the number of StreamLoad tasks committed per partition

Issue Number: close #92

1. Does it affect the original behavior: (I Don't know)
2. Has unit tests been added: (No)
3. Has document been added or modified: (Yes)
4. Does it need to update dependencies: (Yes)
5. Are there any changes that cannot be rolled back: (No)

[JNSimba]

Thank you for your contribution, can you resolve the conflict?

[JNSimba]

If the data is processed according to the partition, when a single partition is particularly large, there may be problems in a streamload?

[baishaoisde]

If the data is processed according to the partition, when a single partition is particularly large, there may be problems in a streamload?

Yes, for this problem, we need to prompt the user in the parameter description that "reparation needs to be used to ensure that the data volume per partition is in a reasonable range after this parameter is enabled". Do you think it is appropriate?