What is the best database to store big data?

Can you elaborate on what criteria you are considering when asking about the best database to store big data? Are you looking for scalability, performance, ease of use, or cost-effectiveness? Also, what kind of big data are you planning to store? Is it structured, unstructured, or a mix of both? And what are your specific requirements for querying and analyzing this data? Answering these questions will help narrow down the options and find the most suitable database for your needs.