When you use SMB and oplocks, the client caches the data that is locked to speed up the accessed to frequently accessed file info. This is the client side setting that controls the caches life time, if we stop caching then we are reading from the server directly and there is no chance for cached data getting stale and causing corruption. If you suspect metadata caching in the redirector as cause for misbehaving applications, disable the caches in the following order to determine which of these caches is affecting the application.
Disabling the File information cache can have significant effect on client performance and show an increase in the number of metadata requests that are sent to the server. We had a site that lost all of their networked driver paths mapped drives when SMB2 was disabled. Disabling only the file caches should not cause this to happen? Is there away to disable the SMB2 caches on the server side as instead of each clients?
However you should look at fixing the corruption issue. There are a few known issues that has hotfix. The one below deals with a corruption issue and the workaround is also on the same lines as you are doing but is for Win7 RTM.
We have been trying to test the effects of oplocking on our ISAM database but so far it seems to not be causing an issue. However we know that in the past our clients have had to disable oplocking to prevent data corruption. As far as I know if I get a lock on a file or a region of a file and then another user tries to get a lock, then my lock will be released to the other user. Is that how it is supposed to work? We have so far not been able to get this to happen. With Exclusive Oplock, if a file is opened in a non-exclusive deny none mode, the redirector requests an opportunistic lock of the entire file.
As long as no other process has the file open, the server will grant this oplock, giving the redirector exclusive access to the specified file. This will allow the redirector to perform read-ahead, write-behind, and lock caching, as long as no other process tries to open the file. At that point, the redirector must invalidate cached data, flush writes and locks, and release the oplock, or close the file.
Opportunistic Locking level II, provides a method for granting read access to a file by more than one workstation, and these workstations can cache read data locally read-ahead. As long as no station writes to the file, multiple stations can have the file open with level II oplock. Sorry this didn't help. Thanks for your feedback. I will repost. I'll leave 10 out of it. When I get to the section about disabling SMB2 on the client the command fails. I have the same question 8. Report abuse.
Details required :. Cancel Submit. Balaji Kundalam MVP. How satisfied are you with this reply? Post a Comment. Popular posts from this blog How to force a DNS zone to replicate. In other words, the DNS zone information is actually stored as a partition in the active directory database. When Active Directory replicates, the zone data transfers. For standard DNS deployments, the data is stored in a file.
You have to configure zone transfers manually in the DNS console. The question in class was how to initiate replication manually. Once you have properly configured a Primary and secondary DNS server and configured the Primary server to allow zone transfers, you can manually initiate a zone transfer.
Below you can see our test environment. The image is of to RDP sessions to two different servers. The DNS console on the left is the primary. You can see and entry for Test2 that is not in the secondary database. The DNS zone is named test. On the se. Read more. Determine which Domain Controller a client is connected to with PowerShell. When a Windows client comes online, it must find a domain controller to bind to.
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