将数据从Oracle复制到SQL Server的速度更快？

Question

我一直在尝试使用以下代码将数据（80000行，105列）从Oracle复制到SQL Server：

OracleConnection oraCon = new OracleConnection(ORACLE_CONNECTION_STR); 
oraCon.Open();                
OracleCommand cmd = new OracleCommand();
cmd.Connection = oraCon;
cmd.CommandText = packageName;
cmd.CommandType = CommandType.StoredProcedure;
OracleParameter param1 = cmd.Parameters.Add(PARAM_YEAR_TERM, OracleDbType.Int32);
param1.Direction = ParameterDirection.Input;
param1.Value = yearTerm;        
OracleParameter param2 = cmd.Parameters.Add(PARAM_RESULT, OracleDbType.RefCursor);
param2.Direction = ParameterDirection.Output;
OracleDataReader reader = cmd.ExecuteReader();    
SqlConnection sqlCon = new SqlConnection(SQL_CONNECTION_STR);
sqlCon.Open();               
SqlBulkCopy bulk = new SqlBulkCopy(sqlCon);
bulk.BulkCopyTimeout = 10000;
bulk.BatchSize = 5000;                
bulk.DestinationTableName = string.Format("dbo.{0}", tableName);               
bulk.WriteToServer(reader);

我更改了各种BatchSize并尝试了但至少需要10分钟。你有什么想让它更快吗？