Direct Driver vs Client/Server performance

Question

What is the bench mark comparison figures for Direct Driver connection vs Client/Server? For example what would be the response times for an index based single row select query on a 1 million row table with an average row-size of 1KB in DD mode and C/S mode?

Answer 1

Chris,
The main application I have discussed in this thread is multi-threaded, using database contexts  and optionally may connect to a remote database. Below is a snippet of the relevant parts for connection:
  sql_context osqlctx;
  char            sname[ NAME_LEN ];
  char            spwd[ NAME_LEN ];
    if ( dbIsRemote ) { // db is remote, use @ to connect
      sprintf(sname,"%s@%s",INTERNAL_DB_CONNECTION_USERNAME,dbConn);
          else {  // db is local, use oracle_sid
      strcpy( sDbEnvName, "ORACLE_SID=" );
      strcat( sDbEnvName, dbConn );
      putenv( sDbEnvName );
      EXEC SQL CONTEXT ALLOCATE :osqlctx;
      EXEC SQL CONTEXT USE :osqlctx;
      EXEC SQL CONNECT :sname IDENTIFIED BY :spwd;
We also have some simpler non-threaded utility applications (some in C and some in C++, also using embedded SQL) which primarily access tables owned by the Oracle instance, but which would also on occasion need to update or remove data from a table cached in TimesTen. So for these scenarios again two connections would be needed also in these utility applicatons, one to oracle, and one to TT to manipulate data in cached tables. Establishing a connection in these applications is using same type of command as above:
EXEC SQL CONNECT :sname IDENTIFIED BY :spwd;
M