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Windows 2008 DFS - Random slow browsing

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Windows 2008 DFS - Random slow browsing

Postby guest » Thu Jul 29, 2010 11:46 am

Hiya,

Got DFS setup between 2 file servers seperated by a 2Mbps WAN link. The Namespace service is installed on all 3 of our DC's (2 main office and 1 branch office). The Replication service is installed on both file servers (1 main office and 1 branch office).

Replication itself seems to be working fine.

However, every now and again browsing DFS shares will be slow, as in 30+ seconds to bring up the folder list. Once it loads, is resumes acceptable browsing speeds. Then randomly will revert to being slow.

This happens on both servers and clients.

Any ideas?

Thanks
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Re: Windows 2008 DFS - Random slow browsing

Postby guest » Thu Jul 29, 2010 11:46 am

Hi,



Yes, “sites” referred in my previous post is Active Directory sites.



Regarding this kind of network performance issue, it is necessary to enable network monitor, and even enable the trace to perform analysis/troubleshooting. However, please understand that it could be time consuming to analyze these trace logs. Also, forum is not the best resource to troubleshoot this kind of issue. I’d like to recommend that you contact Microsoft Customer Support Service for assistance. The support professionals there can provide one-one instant support for you so that the issue can be resolved more efficiently.


To obtain the phone numbers for specific technology request please take a look at the web site listed below:
http://support.microsoft.com/default.aspx?scid=fh;EN-US;PHONENUMBERS





Before that, here are some steps that you can perform on the DFS clients to analyze/troubleshoot this issue:



1. Access the DFS share by using IP address.

2. Access the DFS share by typing the specific file server computer name. For example: \\computername\share

3. Perform a clean boot:
http://support.microsoft.com/kb/331796



Additionally, please understand that, after the DFS clients start, they need to access the DC/root server to obtain referrals at the first time they access the DFS share. Then, DFS clients store the root referrals and link referrals in the referral cache (also called the PKT cache). The next time they access the same DFS share, they will check the cache and access the target folder directly instead of accessing the DC/root server again. However, there is an expiry time for each referral. If the referral has expired, the client will need to obtain a new referral the next time the client tries to access the DFS share.



Therefore, it could be normal that the DFS clients spend more time to access the share folder at the first time after they start.


For more information about the referral proces, refer to the following article:

How DFS Works
http://technet.microsoft.com/en-us/library/cc782417.aspx
Tablet and Smartphone Setup Guide
http://www.quicksetupguide.com

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http://chicagotech.net/
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