I currently work with postgres cluster with 16 shards on 4 machines. Overall database size is bigger than a few terabytes. Horizontal scaling with postgres is p

I currently work with postgres cluster with 16 shards on 4 machines. Overall database size is bigger than a few terabytes. Horizontal scaling with postgres is possible and it works more reliable than mongos. What's more, the exact data in mongo would require a few(dozens) times more disk space - so maybe scaling in mongo is easier, but the way i see it, mongo tries to solve problems that it actually creates.