原理是使用ORACLE的CTL文件,然后用系统的命令直接调用导入。
测试过导入几百个文件,220分钟导入3.7亿条,每秒大概2.8万条。
1.CTL文件模板
LOAD DATA
INFILE '<!--input file name-->'
APPEND INTO TABLE STAT_PVTEMP
FIELDS TERMINATED BY '|'
(Email,ClientIP,Tstamp,URL)
INFILE '<!--input file name-->'
APPEND INTO TABLE STAT_PVTEMP
FIELDS TERMINATED BY '|'
(Email,ClientIP,Tstamp,URL)
2.用服务程序调用目标文件夹下的文件,然后按照CTL文件模板生成文件。
取相应的配置信息:
static string downloadFilePath = System.Web.Configuration.WebConfigurationManager.AppSettings["DownloadFilePath"].ToString();
static string ctlTemplateFile = System.Web.Configuration.WebConfigurationManager.AppSettings["CtlTemplateFile"].ToString();
static string batTemplateFile = System.Web.Configuration.WebConfigurationManager.AppSettings["BatTemplateFile"].ToString();
static string exeTemplatePath = System.Web.Configuration.WebConfigurationManager.AppSettings["ExeTemplatePath"].ToString();
生成导入文件的执行命令:static string ctlTemplateFile = System.Web.Configuration.WebConfigurationManager.AppSettings["CtlTemplateFile"].ToString();
static string batTemplateFile = System.Web.Configuration.WebConfigurationManager.AppSettings["BatTemplateFile"].ToString();
static string exeTemplatePath = System.Web.Configuration.WebConfigurationManager.AppSettings["ExeTemplatePath"].ToString();
string batCmd = "sqlldr userid=用户ID/密码@服务 control="+ctlFilePath+" log="+logFilePath+" bad="+badFilePath+" errors=1000";
执行的命令的函数:
public static string ExeCommand(string commandText)
{
Process p = new Process();
p.StartInfo.FileName = "cmd.exe";
p.StartInfo.UseShellExecute = false;
p.StartInfo.RedirectStandardInput = true;
p.StartInfo.RedirectStandardOutput = true;
p.StartInfo.RedirectStandardError = true;
p.StartInfo.CreateNoWindow = true;
string stroutput = null;
try
{
p.Start();
p.StandardInput.WriteLine(commandText);
p.StandardInput.WriteLine("exit");
stroutput = p.StandardOutput.ReadToEnd();
p.WaitForExit();
p.Close();
}
catch (Exception ex)
{
stroutput = ex.Message;
}
return stroutput;
}
以上方法仅供学习研究,有好的方法可以讨论。
{
Process p = new Process();
p.StartInfo.FileName = "cmd.exe";
p.StartInfo.UseShellExecute = false;
p.StartInfo.RedirectStandardInput = true;
p.StartInfo.RedirectStandardOutput = true;
p.StartInfo.RedirectStandardError = true;
p.StartInfo.CreateNoWindow = true;
string stroutput = null;
try
{
p.Start();
p.StandardInput.WriteLine(commandText);
p.StandardInput.WriteLine("exit");
stroutput = p.StandardOutput.ReadToEnd();
p.WaitForExit();
p.Close();
}
catch (Exception ex)
{
stroutput = ex.Message;
}
return stroutput;
}