So, how do you actually deal with database sharding when you've got huge amounts of data? Like, what's the strategy?

hey everyon, been wrestlin with database scaling lately, specificly sharding. were starin down the barrel of potentilly petabytes of data in the next few years, and the current single-node setup just isnt going to cut it. were considerin a few options like horizontal sharding based on user id ranges or maybe a more dynamic approach. curius to hear what strats youve found effective for sharding massive datasets. what were the biggest pain points you encountered, and how did you overcome them? any specific tools or architecures youd recommend