Microsoft KB Archive/890476

= FIX: You experience poor performance when you perform automatic synchronization of content that is uploaded from an FTP server in Application Center 2000 =

Article ID: 890476

Article Last Modified on 6/5/2006

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APPLIES TO


 * Microsoft Application Center 2000 Standard Edition

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SYMPTOMS
In Microsoft Application Center 2000, you experience poor performance when you perform automatic synchronization of content that is uploaded from a File Transfer Protocol (FTP) server.

Note You discover this problem when you enable tracing, and the output reveals that the same files are being synchronized many times.



CAUSE
FTP writes data in chunks and then immediately closes the file handle by design. This behavior may lead the content synchronization service to believe a new file has been completely uploaded. Therefore, the content synchronization service replicates the content on every write. This can cause several replications of the same file when the file is uploaded.

The content synchronization service does test for duplicate files. However, the content synchronization service does not hold on to records long enough to detect duplicate files when you use a slow upload process such as FTP.



Hotfix information
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Application Center 2000 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

Prerequisites
To apply this hotfix, you must have Application Center 2000 Service Pack 2 (SP2) installed on the computer.

Restart requirement
You do not have to restart the computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other hotfixes.

File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.   Date         Time   Version     Size     File name 24-Mar-2005 19:24  1.0.781.13   58,880  Mdutil.exe 24-Mar-2005 19:25  1.0.781.13  105,472  Rdrvfs.dll



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
This hotfix adds a configurable replication governor to the content synchronization service. This configurable replication governor lets you determine how long a potential duplicate file is held in the duplicate list so that the content synchronization service can detect duplicate files and prevent unnecessary replications. You can delay processing a duplicate file by changing the following metabase key:

Path: /webreplication/local/ReplicationResourceTypes/fs

Value: FileChangeDelta

Type: DWORD

Range: from 0 to 2147483647

Description: Set to the number of milliseconds (1/1000 second = 0.001 second) to delay processing a duplicate file change.

To change this value, use the Mdutil.exe file that is included in this hotfix. To run the Mdutil.exe file, follow these steps:  Click Start, click Run, type cmd, and then click OK. Type a command that is similar to the following command at the command prompt. For example, type the following command at the command prompt to change the FileChangeDelta value to 5 seconds:

mdutil SET /webreplication/local/ReplicationResourceTypes/fs/FileChangeDelta 5000

Note The FileChangeDelta value can be any value from 0 milliseconds to 2,147,483,647 milliseconds.

For more information, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Keywords: kbbug kbfix kbqfe kbacenter2000fix kbprb kbhotfixserver KB890476

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