Problems with IIS6.0 and UNC shares. Any help appreciated.
From: David Olive (david.olive_at_westnet.com.au)
Date: 02/24/05
- Next message: rhelsens_at_gmail.com: "IIS6 - ASP.NET Permissions woes"
- Previous message: Dave: "Re: Question - Virus Related"
- Next in thread: Bernard: "Re: Problems with IIS6.0 and UNC shares. Any help appreciated."
- Reply: Bernard: "Re: Problems with IIS6.0 and UNC shares. Any help appreciated."
- Messages sorted by: [ date ] [ thread ]
Date: Thu, 24 Feb 2005 09:48:14 +0800
We are a second tier ISP based in Australia who has recently started pushing
Windows based hosting as an additional revenue stream. We currently host
700 websites on a load balanced IIS6.0 based server with a NAS backend. We
are currently experiencing problems with our IIS 6.0 / UNC configuration.
Here is the background of our network layout. Our NAS is a Intel Dual Xeon
server running Windows 2003 Standard edition and our Web servers are both
Pentium 3 1GHz machines running Windows 2003 Web Edition.
Requests come in on a load balancer that pushes each request to an IIS6.0
web server which then refers to a UNC share on our NAS for the data backend.
The load balancer polls each web servers default site every 15 seconds to
ensure that the service is still up. If it is unable to retrieve a HTTP
response header it will remove the server from the load balancer. Once this
is done the load balancer continues to poll the default site and once it is
able to resolve it will be added back into the cluster by the load balancer.
We are finding that servers are being removed fairly often from the load
balanced cluster due to the load balancer being unable to retrieve the
default page. Normally within a minute or so it is able to retrieve the
page and the server is then added back to the cluster. Obviously this is a
problem due to session state being lost for our asp.net hosted customers.
We have done some testing of this behaviour and have noticed that when a
site is removed from the cluster we are unable to browse to our NAS using
UNC paths from both a management workstation or a web server. Once the
cluster is added back the NAS responds almost immediately.
Based on this I assumed the problem may have something to do with SMB queue
requests but am having problems finding the exact settings to change to fix
or monitor the behaviour. We have added some more powerful servers into the
equation but while this stops the problem occurring so regularly it still
seems to occur. If the data is stored locally we have no problems with
removal of cluster members but this is not a solution to our problem. At
the moment we have setup an IIS6.0 server running the majority of our
requests from local storage on our NAS, and also have our other two servers
configured with decreased weighting in our load balancer. I assume that the
problem is no longer manifesting itself due to the increased hardware and
looking at the performance logs the majority of the requests are being sent
to our NAS which is serving from local storage. If the other two servers
are given increased weighting then they will start to drop from our load
balancer again.
If requested I am able to run an IISTrace and dump the web servers when they
are removed form the load balancer but I am not convinced the problem lies
with IIS6.0 as the servers are almost idle and IISCrash / Hang Agent shows
no errors.
Sorry for the novel but I thought the more information the better. Any help
with the above would be much appreciated, I'm ready to open a support case
but thought I would ask some of the newsgroups first.
- Next message: rhelsens_at_gmail.com: "IIS6 - ASP.NET Permissions woes"
- Previous message: Dave: "Re: Question - Virus Related"
- Next in thread: Bernard: "Re: Problems with IIS6.0 and UNC shares. Any help appreciated."
- Reply: Bernard: "Re: Problems with IIS6.0 and UNC shares. Any help appreciated."
- Messages sorted by: [ date ] [ thread ]
Relevant Pages
|
