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\section{Management Module}
The management module provide a working environment for cass\_table,
cass\_index and cass\_distfunc. It respond to user request to
add/remove table, indices, etc. 

\subsection {Management related API}
\begin{verbatim}

typedef struct _cass_env_t {
    // Internal management data for controlling the whole system 
    // similar to DB_ENV in BDB.
    // Need to hold all the meta data about tables, maps, indexes as well
    // as their checkpoint informations.
    
} cass_env_t; 

int cass_env_create(cass_env_t **env, uint32_t flags);
int cass_env_open(cass_env_t *env, char *db_home, uint32_t flags); 
      // Automatically recover to a consistent stage in case of crash.
int cass_env_close(cass_env_t *env, uint32_t flags);
int cass_env_err(cass_env_t *env, int error, const char *fmt, ...);

int cass_env_checkpoint(cass_env_t *env);
int cass_env_restorelastcheckpoint(cass_env_t *env);

// Control the system via cass_table_create, cass_idx_create etc.
// For simplicity, we will assume that we can load the table&index
// control structure into memory as part of cass_env upon system
// startup. This will simplify the management and enable on-disk
// sequential scan if needed since we know about the table even when 
// the data is not in memory.

// Need to add details on how to do checkpointing and recovery.
// Need details on external config file, what the user interface will
// look like, etc.
\end{verbatim}