SMB2 Directory Caching
We started noticing a problem with our Windows 7 clients accessing files stored on a 2008 R2 server. Specifically we saw that the network directory was not displaying updated content on some of the clients. Further research suggests that adding the
following keys resolves the problem.
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters
FileInfoCacheLifetime
FileNotFoundCacheLifetime
DirectoryCacheLifetime
My question is what effect will setting the value of these keys to 1 have on our network. I know by default SMB2 caching is suppose to poll every 10 seconds. So by dropping this down to 1 second are we going to notice a significant amount of additional
bandwidth? I dont want to roll out this change and have our network or file server overwhelmed. I appreciate any information anyone has regarding this change.
May 23rd, 2012 10:06am
Hi,
Here is an article can be referred to.
SMB2 Client Redirector Caches Explained
http://technet.microsoft.com/en-us/library/ff686200(v=ws.10).aspxIvan-Liu
TechNet Community Support
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May 25th, 2012 11:59pm
I appreciate your response. However I have seen this article. My question is, what will the effects be to my file server and network by changing this registry value. By disabling\reducing caching is my file server going to be inundated with requests. Is
there a performance hit for modifying this registry key?
Thank you,
Kevin
June 4th, 2012 1:33pm
Why are you continously replying back with hyperlinks that dont specifically address my question? Cant you just answer my question in your own words?
"My question is what effect will setting the value of these keys to 1 have on our network. I know by default SMB2 caching is suppose to poll every 10 seconds. So by dropping this down to 1 second are we going to notice a significant amount of additional
bandwidth? I dont want to roll out this change and have our network or file server overwhelmed. I appreciate any information anyone has regarding this change."
Free Windows Admin Tool Kit Click here and download it now
June 24th, 2012 9:50pm