I am working on a web app that will receive meter readings from our customers' electric submeters. Data will be sent as JSON strings from the computer that reads the meters to a web app on a VPS which will send the data to a mySQL database. Many of our customers only have only one or two meters but some have up to 300. One has 800. I am concerned that if two large facilities transmit their data at the same time I may have conflicts with the locked tables, What is the best way to handle this? I would like to plan for this before the system is built and runs into problems. All my previous db experience has been with very small systems, 3 users max.