ODBC Logging <odbcLogging>


The <odbcLogging> element configures Open Database Connectivity (ODBC) logging for Internet Information Services (IIS) 7. ODBC logging records all HTTP activity to a user-defined database instead of to text files.

ODBC logging is implemented as a custom logging module in IIS 7, therefore enabling and configuring ODBC logging in IIS 7 consists of two separate actions:

  • Setting the ODBC logging attributes in the <odbcLogging> element. Specifically, the following attributes must be configured:
    • The dataSource attribute must specify the System Data Source Name (DSN) for the database where the table specified by the tableName attribute is located.
    • The password attribute must specify the database password that IIS 7 will use when writing log information to the database.
    • The tableName attribute must specify the name of the database table in the database that is specified by the dataSource attribute.
    • The userName attribute must specify the database user name that IIS 7 will use when writing log information to the database.
  • Setting the correct custom logging attributes in the <logFile> element. Specifically, the following attributes must be configured:
    • The logFormat attribute must be set to "Custom."
    • The customLogPluginClsid attribute must be set to "{FF16065B-DE82-11CF-BC0A-00AA006111E0}"

By default, IIS 7 logs all activity to text files that use the W3C extended log file format, and by default you can configure IIS to use other text file formats such as the NCSA or native IIS format. The major disadvantage of using these text-based formats is that they are more difficult to parse for activity, and generally require a utility like Microsoft's LogParser in order to retrieve any useful information from your logs. In addition, data-parsing performance with text files is also typically much slower than using a database. However, text-based logging is performed in kernel mode, which improves the performance for logging requests.

When you use ODBC logging, your server's activity is stored in a database, which should greatly improve data retrieval. This expands the possibilities for using a wide variety of database clients when data mining your server's activity. The major disadvantage to using ODBC logging is the performance for logging because when ODBC logging is enabled, IIS disables the kernel-mode cache. For this reason, implementing ODBC logging can degrade overall server performance.

Note: To create the table for ODBC logging, you can use the "%windir%\System32\inetsrv\logtemp.sql" file that is provided with IIS 7. For more information about ODBC logging, see Microsoft Knowledge Base Article 245243.


Version Notes
IIS 7.5 The <odbcLogging> element was not modified in IIS 7.5.
IIS 7.0 The <odbcLogging> element was introduced in IIS 7.0.
IIS 6.0 The attributes of the <odbcLogging> element replace the following IIS 6.0 metabase properties:
  • LogOdbcDataSource
  • LogOdbcPassword
  • LogOdbcTableName
  • LogOdbcUserName


The <odbcLogging> element is not available on the default installation of IIS 7. To install it, use the following steps.

Windows Server 2008 or Windows Server 2008 R2

  1. On the taskbar, click Start, point to Administrative Tools, and then click Server Manager.
  2. In the Server Manager hierarchy pane, expand Roles, and then click Web Server (IIS).
  3. In the Web Server (IIS) pane, scroll to the Role Services section, and then click Add Role Services.
  4. On the Select Role Services page of the Add Role Services Wizard, select ODBC Logging, and then click Next.

  5. On the Confirm Installation Selections page, click Install.
  6. On the Results page, click Close.

Windows Vista or Windows 7

  1. On the taskbar, click Start, and then click Control Panel.
  2. In Control Panel, click Programs and Features, and then click Turn Windows Features on or off.
  3. Expand Internet Information Services, then select ODBC Logging, and then click OK.

How To

There is no user interface for configuring ODBC logging for IIS 7. For examples of how to configure ODBC logging programmatically, see the Code Samples section of this document.



Attribute Description
dataSource Optional string attribute.

Specifies the System Data Source Name (DSN) for the database to which the log is written.

The default value is InternetDb.

password Optional string attribute.

Specifies the ODBC database password that you use when you write information to the database during event logging. By default, this value is encrypted.

The default value is [enc:AesProvider::enc].

tableName Optional string attribute.

Specifies the name of the ODBC database table where Windows writes information during event logging.

The default value is InternetLog.

userName Optional string attribute.

Specifies the ODBC database user name that is used for writing information to the database during event logging.

The default value is InternetAdmin.

Child Elements


Configuration Sample

This first configuration sample for the Default Web Site configures the attributes in the <odbcLogging> element that specify the system DSN, table name, user name, and password for an ODBC logging connection.

<location path="Default Web Site">
      <odbcLogging dataSource="InternetDb"
         password="[enc:AesProvider:57686f6120447564652c2049495320526f636b73:enc]" />

This second configuration sample configures the correct custom logging attributes in <logFile> element that enable ODBC logging for the Default Web Site.

<site name="Default Web Site" id="1" serverAutoStart="true">
   <application path="/" applicationPool="DefaultAppPool">
      <virtualDirectory path="/" physicalPath="%SystemDrive%\inetpub\wwwroot" />
      <binding protocol="http" bindingInformation="*:80:" />
   <logFile logFormat="Custom"
      customLogPluginClsid="{FF16065B-DE82-11CF-BC0A-00AA006111E0}" />

Sample Code

The following code samples configure two sets of options for the Default Web Site:

  • The first half of each sample configures the attributes in the <odbcLogging> element that specify the system DSN, table name, user name, and password for an ODBC logging connection.
  • The second half of each sample specifies the custom logging attributes in <logFile> element that enable ODBC logging.


appcmd.exe set config "Default Web Site" -section:system.webServer/odbcLogging /dataSource:"InternetDb" /commit:apphost
appcmd.exe set config "Default Web Site" -section:system.webServer/odbcLogging /tableName:"InternetLog" /commit:apphost
appcmd.exe set config "Default Web Site" -section:system.webServer/odbcLogging /userName:"InternetAdmin" /commit:apphost
appcmd.exe set config "Default Web Site" -section:system.webServer/odbcLogging /password:"P@ssw0rd" /commit:apphost

appcmd.exe set sites "Default Web Site" -logFile.logFormat:"Custom" /commit:apphost
appcmd.exe set sites "Default Web Site" -logFile.customLogPluginClsid:"{FF16065B-DE82-11CF-BC0A-00AA006111E0}" /commit:apphost

Note: You must be sure to set the commit parameter to apphost when you use AppCmd.exe to configure these settings. This commits the configuration settings to the appropriate location section in the ApplicationHost.config file.


using System;
using System.Text;
using Microsoft.Web.Administration;

internal static class Sample
   private static void Main()
      using (ServerManager serverManager = new ServerManager())
         Configuration config = serverManager.GetApplicationHostConfiguration();

         ConfigurationSection odbcLoggingSection = config.GetSection("system.webServer/odbcLogging", "Default Web Site");
         odbcLoggingSection["dataSource"] = @"InternetDb";
         odbcLoggingSection["tableName"] = @"InternetLog";
         odbcLoggingSection["userName"] = @"InternetAdmin";
         odbcLoggingSection["password"] = @"P@ssw0rd";

         ConfigurationSection sitesSection = config.GetSection("system.applicationHost/sites");
         ConfigurationElementCollection sitesCollection = sitesSection.GetCollection();
         ConfigurationElement siteElement = FindElement(sitesCollection, "site", "name", @"Default Web Site");
         if (siteElement == null) throw new InvalidOperationException("Element not found!");

         ConfigurationElement logFileElement = siteElement.GetChildElement("logFile");
         logFileElement["customLogPluginClsid"] = @"{FF16065B-DE82-11CF-BC0A-00AA006111E0}";
         logFileElement["logFormat"] = @"Custom";


   private static ConfigurationElement FindElement(ConfigurationElementCollection collection, string elementTagName, params string[] keyValues)
      foreach (ConfigurationElement element in collection)
         if (String.Equals(element.ElementTagName, elementTagName, StringComparison.OrdinalIgnoreCase))
            bool matches = true;
            for (int i = 0; i < keyValues.Length; i += 2)
               object o = element.GetAttributeValue(keyValues[i]);
               string value = null;
               if (o != null)
                  value = o.ToString();
               if (!String.Equals(value, keyValues[i + 1], StringComparison.OrdinalIgnoreCase))
                  matches = false;
            if (matches)
               return element;
      return null;


Imports System
Imports System.Text
Imports Microsoft.Web.Administration

Module Sample
   Sub Main()
      Dim serverManager As ServerManager = New ServerManager
      Dim config As Configuration = serverManager.GetApplicationHostConfiguration

      Dim odbcLoggingSection As ConfigurationSection = config.GetSection("system.webServer/odbcLogging", "Default Web Site")
      odbcLoggingSection("dataSource") = "InternetDb"
      odbcLoggingSection("tableName") = "InternetLog"
      odbcLoggingSection("userName") = "InternetAdmin"
      odbcLoggingSection("password") = "P@ssw0rd"

      Dim sitesSection As ConfigurationSection = config.GetSection("system.applicationHost/sites")
      Dim sitesCollection As ConfigurationElementCollection = sitesSection.GetCollection
      Dim siteElement As ConfigurationElement = FindElement(sitesCollection, "site", "name", "Default Web Site")
      If (siteElement Is Nothing) Then
         Throw New InvalidOperationException("Element not found!")
      End If

      Dim logFileElement As ConfigurationElement = siteElement.GetChildElement("logFile")
      logFileElement("customLogPluginClsid") = "{FF16065B-DE82-11CF-BC0A-00AA006111E0}"
      logFileElement("logFormat") = "Custom"

   End Sub

   Private Function FindElement(ByVal collection As ConfigurationElementCollection, ByVal elementTagName As String, ByVal ParamArray keyValues() As String) As ConfigurationElement
      For Each element As ConfigurationElement In collection
         If String.Equals(element.ElementTagName, elementTagName, StringComparison.OrdinalIgnoreCase) Then
            Dim matches As Boolean = True
            Dim i As Integer
            For i = 0 To keyValues.Length - 1 Step 2
               Dim o As Object = element.GetAttributeValue(keyValues(i))
               Dim value As String = Nothing
               If (Not (o) Is Nothing) Then
                  value = o.ToString
               End If
               If Not String.Equals(value, keyValues((i + 1)), StringComparison.OrdinalIgnoreCase) Then
                  matches = False
                  Exit For
               End If
            If matches Then
               Return element
            End If
         End If
      Return Nothing
   End Function

End Module


var adminManager = new ActiveXObject('Microsoft.ApplicationHost.WritableAdminManager');
adminManager.CommitPath = "MACHINE/WEBROOT/APPHOST";

var odbcLoggingSection = adminManager.GetAdminSection("system.webServer/odbcLogging", "MACHINE/WEBROOT/APPHOST/Default Web Site");
odbcLoggingSection.Properties.Item("dataSource").Value = "InternetDb";
odbcLoggingSection.Properties.Item("tableName").Value = "InternetLog";
odbcLoggingSection.Properties.Item("userName").Value = "InternetAdmin";
odbcLoggingSection.Properties.Item("password").Value = "P@ssw0rd";

var sitesSection = adminManager.GetAdminSection("system.applicationHost/sites", "MACHINE/WEBROOT/APPHOST");
var sitesCollection = sitesSection.Collection;
var siteElementPos = FindElement(sitesCollection, "site", ["name", "Default Web Site"]);
if (siteElementPos == -1) throw "Element not found!";
var siteElement = sitesCollection.Item(siteElementPos);

var logFileElement = siteElement.ChildElements.Item("logFile");
logFileElement.Properties.Item("customLogPluginClsid").Value = "{FF16065B-DE82-11CF-BC0A-00AA006111E0}";
logFileElement.Properties.Item("logFormat").Value = "Custom";


function FindElement(collection, elementTagName, valuesToMatch) {
   for (var i = 0; i < collection.Count; i++) {
      var element = collection.Item(i);
      if (element.Name == elementTagName) {
         var matches = true;
         for (var iVal = 0; iVal < valuesToMatch.length; iVal += 2) {
            var property = element.GetPropertyByName(valuesToMatch[iVal]);
            var value = property.Value;
            if (value != null) {
               value = value.toString();
            if (value != valuesToMatch[iVal + 1]) {
               matches = false;
         if (matches) {
            return i;
   return -1;


Set adminManager = WScript.CreateObject("Microsoft.ApplicationHost.WritableAdminManager")
adminManager.CommitPath = "MACHINE/WEBROOT/APPHOST"

Set odbcLoggingSection = adminManager.GetAdminSection("system.webServer/odbcLogging", "MACHINE/WEBROOT/APPHOST/Default Web Site")
odbcLoggingSection.Properties.Item("dataSource").Value = "InternetDb"
odbcLoggingSection.Properties.Item("tableName").Value = "InternetLog"
odbcLoggingSection.Properties.Item("userName").Value = "InternetAdmin"
odbcLoggingSection.Properties.Item("password").Value = "P@ssw0rd"

Set sitesSection = adminManager.GetAdminSection("system.applicationHost/sites", "MACHINE/WEBROOT/APPHOST")
Set sitesCollection = sitesSection.Collection
siteElementPos = FindElement(sitesCollection, "site", Array("name", "Default Web Site"))
If (siteElementPos = -1) Then
   WScript.Echo "Element not found!"
End If
Set siteElement = sitesCollection.Item(siteElementPos)

Set logFileElement = siteElement.ChildElements.Item("logFile")
logFileElement.Properties.Item("customLogPluginClsid").Value = "{FF16065B-DE82-11CF-BC0A-00AA006111E0}"
logFileElement.Properties.Item("logFormat").Value = "Custom"


Function FindElement(collection, elementTagName, valuesToMatch)
   For i = 0 To CInt(collection.Count) - 1
      Set element = collection.Item(i)
      If element.Name = elementTagName Then
         matches = True
         For iVal = 0 To UBound(valuesToMatch) Step 2
            Set property = element.GetPropertyByName(valuesToMatch(iVal))
            value = property.Value
            If Not IsNull(value) Then
               value = CStr(value)
            End If
            If Not value = CStr(valuesToMatch(iVal + 1)) Then
               matches = False
               Exit For
            End If
         If matches Then
            Exit For
         End If
      End If
   If matches Then
      FindElement = i
      FindElement = -1
   End If
End Function
Deprecated Elements