How to Use Jetpack.exe to Compact a WINS or DHCP Database

 Last reviewed: November 25, 1997
Article ID: Q145881
The information in this article applies to:
  • Microsoft Windows NT Server versions 3.5, 3.51, and 4.0

SUMMARY

Microsoft Windows NT Server includes a utility, Jetpack.exe, that can be used to compact a Windows Internet Name Service (WINS) or Dynamic Host Configuration Protocol (DHCP) database. Microsoft recommends that you compact the WINS database whenever it approaches 30 MB.

NOTE: Chapter 5 page 133 of the Microsoft Windows NT Server versions 3.5 and 3.51 TCP/IP manuals states that Compact.exe can be executed to compact the WINS database. This is not correct. The correct file name is Jetpack.exe.

MORE INFORMATION

The correct syntax for Jetpack.exe is: 

   JETPACK.EXE <database name> <temp database name>
Example commands to compact the WINS database: 

   CD %SYSTEMROOT%\SYSTEM32\WINS
   NET STOP WINS
   JETPACK WINS.MDB TMP.MDB
   NET START WINS
Example commands to compact the DHCP database: 

   CD %SYSTEMROOT%\SYSTEM32\DHCP
   NET STOP DHCPSERVER
   JETPACK DHCP.MDB TMP.MDB
   NET START DHCPSERVER
In the examples above, Tmp.mdb is a temporary database that is used by Jetpack.exe. Wins.mdb is the WINS database. Dhcp.mdb is the DHCP database.

Jetpack.exe compacts the WINS or DHCP database by doing the following:

  1. Copies database information to a temporary database file called Tmp.mdb.

  2. Deletes the original database file, Wins.mdb or Dhcp.mdb.

  3. Renames the temporary database files to the original filename.

NOTE: Jetpack.exe creates another temporary file called Temp.mdb during the compact process. Temp.mdb is removed when the compact process is complete. Therefore, note the following:
  • Do not specify a filename of Temp.mdb on the JETPACK command line. A duplicate file error message appears if Temp.mdb is used.
  • Make sure you not have any file called Temp.mdb in your WINS or DHCP folder.

Additional query words: 3.50 3.51 4.00 prodnt JET access database dynamic
Keywords : NTSrv nttcp ntutil kbtool
Version : 3.5 3.51 4.0
Platform : winnt

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Last reviewed: November 25, 1997
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