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HomeHomeUsing DNN Platf...Using DNN Platf...Administration ...Administration ...DNN 6.2.6 CE web farm with multiple file serversDNN 6.2.6 CE web farm with multiple file servers
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8/1/2013 4:56 PM
 
Ana


Joined: 10/14/2010
Posts: 12

Hi,

We are planning to convert our website which is running on single server to a web farm with two servers on Windows 2008 R2. I am afraid I haven't found lot of documentation on this topic. Can any one point me to the proper documentation for this. The one document I found is

http://www.datasprings.com/resources/...

This one explains using single UNC share as file server but we are looking into to use every server in the web farm as file server (i.e have dotnetnuke folder on all the server's local drive) since UNC share becomes single point of failure (I don't have big understanding on this topic, please correct me if my assumption is wrong about single point of failure).   So my questions are:

1. Can I do DNN web farm with multiple file servers, if so, how?

2. And also, how does the modules updates should be done? Does it need to be done on all the servers separately or does the DNN has any inbuilt mechanism for this or do we need to use DFS replication between the servers?

3. Also, we use heavy caching. Since we have to use file caching in the DNN CE web farms, how does the caching works with multiple file servers?

Also, please let me know any points or gotcha that I need be aware of. Any help is greatly appreciated.

Thanks,

Ana
 
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8/12/2013 9:24 PM
 
cathal connolly


cathal connolly's Avatar

www.cathal.co.uk
Joined: 4/9/2003
Posts: 9676

1. yes, it's perfectly possible. The wiki has some useful information - http://www.dnnsoftware.com/wiki/Page/... . Basically we need a shared space where cache entries can be written so that things do not get stale. The filebased caching provider uses a UNC path as it's shared space - but that's all that needs shared. The caching providers do not take care of the files themselves, you have to manage that. The most common ways are to put them all on one machine and set all your webservers to access that via UNC, but it's equally valid to use other synchronisation approaches such as Microsofts DFS - we even have some users using simply programs such as robocopy.

2. install the module on any of the webservers - this will create some database entries (which is fine as all the webservers use the same database) and create the files on that machine. If using a UNC approach, then the sites all share the filesystem so nothing further needs done. If doing synchronisation, whatever approach (DFS, robocopy) they will automatically copy the files to the other machines.

3. that is what the cache provider is for - it synchronises the cache on the different machines e.g. if a site setting is changed on one machine, and stored in cache , the cache provider will create an item to handle the expiry of it. If you're using the file based provider it does this by creating a small file.

Buy the new Professional DNN7: Open Source .NET CMS Platform book Amazon US
 
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8/15/2013 3:56 AM
 
Wes Tatters


Wes Tatters's Avatar

Joined: 4/30/2004
Posts: 2155

just a tip - if you have the option put the shared cache UNC on a raid drive or a ssd - it can get a serious pounding in a heavily loaded system - and can wind up being the bottleneck if performance is what you need.
 
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