KnowledgeBase Archive

An Archive of Early Microsoft KnowledgeBase Articles

View on GitHub

Q133280: FTPSVC: Delay Receiving FTP Directory Annotation and Prompt

Article: Q133280
Product(s): Microsoft Windows NT
Version(s): 3.51
Operating System(s): 
Keyword(s): kbnetwork
Last Modified: 08-AUG-2001

-------------------------------------------------------------------------------
The information in this article applies to:

- Microsoft Windows NT Workstation version 3.51 
- Microsoft Windows NT Server version 3.51 
-------------------------------------------------------------------------------

SYMPTOMS
========

When you logon to a very busy Windows NT 3.51 ftp server, you experience a delay
receiving the directory annotation and ftp prompt (after you enter your
password).

Network Performance Monitor (PERFMON.EXE) shows the number of ftp server current
connections increasing, but the number of anonymous users logged on decreasing.
The system normally recovers within a few minutes.

CAUSE
=====

The FTP service was modified for Windows NT version 3.51 to provide directory
annotation of the ftp root directory at logon. The calls used to do this
annotation involved unnecessary file locking, especially when no ~ftpsvc~.ckm
(directory annotation) file existed in the ftp root directory.

RESOLUTION
==========

To correct this problem, install the latest U.S. Service Pack for Windows NT
version 3.51.

Microsoft corrected this problem in the modified file, FTPSVC.DLL. This fix
improves logon performance by optimizing the directory annotation code so it
does less file locking.

NOTE: This fix was tested on ftp.microsoft.com, which performs over 50,000
anonymous ftp logons per day.

STATUS
======

Microsoft has confirmed this to be a problem in Windows NT version 3.51. This
problem has been corrected in the latest U.S. Service Pack for Windows NT
version 3.51. For information on obtaining the Service Pack, query on the
following word in the Microsoft Knowledge Base (without the spaces):

  S E R V P A C K

Additional query words: prodnt log on ons

======================================================================
Keywords          : kbnetwork 
Technology        : kbWinNTsearch kbWinNTWsearch kbWinNT351search kbWinNTW351search kbWinNTW351 kbWinNTSsearch kbWinNTS351 kbWinNTS351search
Version           : 3.51

=============================================================================

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.