spark - local question

[张健BJ]

Dear developers:
 I have a question about the pyspark local mode. Can it be used in production 
and Will it cause unexpected problems? The scenario is as follows: 
Our team wants to develop an etl component based on python language. Data can 
be transferred between various data sources. 
If there is no yarn environment, can we read data from Database A and write it 
to Database B in local mode.Will this function be guaranteed to be stable and 
available?
Thanks,
Look forward to your reply