#include <db.h> int DB->set_partition_dirs(DB *db, const char **dirs);
Specify which directories will contain the database extents. If the number of directories is less than the number of partitions, the directories will be used in a round robin fashion.
             The DB->set_partition_dirs() method
             may not be called after the 
             DB->open()  method is called.
    
         The DB->set_partition_dirs()
         
            
                  method returns a non-zero error value on failure and 0 on success.
            
            
        
    
The dirs points to an array of directories that will be used to create or locate the database extent files specified to the DB->open() method. The directories must be included in the environment list specified by DB_ENV->add_data_dir().
            The DB->set_partition_dirs()
            
            
                 method may fail and return one of the following non-zero errors: