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Offline Files (Background) Sync makes File Explorer and other programs responding slow

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Hi TechNet,

I have a problem with Offline Files and especially with VPN users.
For VPNusers, theslow-link policy is activated with abackground syncinterval of onehour. But, when Offline Files is syncing, their File Explorer is hanging (not responding) by creating new files/folders, deleting files/folder, or rename files/folders. This happens only in their (redirected)UserData folder or with other DFS shares which are cached locally. In other programs (Outlook or Office 2010) when they save data in the UserData folder exactly the same things happens (not responding).Thisproblemoccursin both theinternal network and viaVPN,sobandwidth isnot the problem. When the sync is finished, everything is working fine again.

I've tested:

- Offline mode with scheduled background sync: problem occurs
- Online mode with manual sync: problem occurs
- Rebuild offline cache database: no effect
- Tested with fresh Windows 8(.1) installations and user profiles: problem occurs
- Monitoring SMB traffic with WireShark: no result
- Montoring Windows 8(.1) clients with procmon: no result
- Tested with full DFS paths: problem occurs
- Browsing in the Offline Files folder (Sync Center -> Manage Offline Files -> View Offline Files) is very slow (with +-200MB and more data). This occurs also when Offline Files is not syncing.

Does anyone have anidea how I cansolve this problem?

Thanks,
Bas

(Sorry for my bad English)


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