Here's an efficient way to load a dataset into Vertica by splitting it up into multiple pieces and then parallelizing the load process.
Note that this only makes sense if your Vertica cluster is a single node. If it's running more nodes, there are definitely more efficient ways of doing this.
For this example, the large CSV file will be called large_file.csv. If your file is under 1GB, it
probably makes sense to load it using a single COPY command.