See https://pkg.go.dev/github.com/gocql/gocql#hdr-Data_center_awareness_and_query_routing
1. create a keyspace
CREATE KEYSPACE seaweedfs WITH replication = {'class':'SimpleStrategy', 'replication_factor' : 1};
2. create filemeta table
USE seaweedfs;
CREATE TABLE filemeta (
directory varchar,
name varchar,
meta blob,
PRIMARY KEY (directory, name)
) WITH CLUSTERING ORDER BY (name ASC);