What is the file that's responsible for keeping all Active Directory databases?

The file is called as ntds.dit. 

Along with this file there are other files also present in this folder. 

List of files listed below 

1. ntds.dit 

2. edb.log 

3. res1.log

4. res2.log  

5. edb.chk 

NTDS.DIT is the file that's responsible for keeping all AD databases

all ADDS database objects should be keep in NTDS.dit file

NTDS.dit means New Technology Directory Servics. Directory Information Tree

There are many ...but to be specific its the  "ntds.dit"(which full form goes as New Technology Directory Services. Directory Information Tree)......and by the way ...Active Directory Database is Stored in NDTS folder of %SYSTEM ROOT%.....

Hope this helps.

The Active Directory Database is Stored in %SYSTEM ROOT%\\NDTS folder. The file is called as ntds.dit. Along with this file there are other files also present in this folder. List of files and use of those files are listed below 1. ntds.dit : This is the main database file for active directory. 2. edb.log : When a transaction performed to ad database, like writing some data first the data will be stored to this file. And after that it will be sent to database. So the system performance will be depends on how this data from edb.log file will be written to ntds.dit 3. res1.log : Used as reserve space in the case when drive had low space. It is basically 10MB in size and creted when we run dcpromo. 4. res2.log : Same as res1.log. It is also 10MB in size and the purspose also same. 5. edb.chk : This file records the transactions committed to ad database. During shutdown, shutdown statement is written to this file. If it is not found when the system rebooted, the ad database tries to check with edb.log for the updated information. Edb corruption or Edb active directory corruption is really serious. However you can get this repaired by using edb repair tool.

active directory database ntds.dit

ntds.dit  is the file and extension is dit which have the responsibility

Stored in %SYSTEM ROOT%\\NDTS folder.