I have tried the hashing code on IIS 5 and it works but this doesn't match what
would happen by default.
I think the website creation needs a parameter for SiteId which by default
works as it currently does to avoid breaking existing installs. It should be
possible to set this to default (as it works now), hash or a specific value.
I have remembered why we needed this to be an known repeatable value. If you
are using a farm with a session state server all servers must have the same
site Id as this is used to identify the session.
Neil
Neil Sleightholm
X2 Systems Limited
[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
________________________________
From: [EMAIL PROTECTED] on behalf of Andrew Burgher
Sent: Tue 10/06/2008 23:28
To: 'General discussion for Windows Installer XML toolset.'
Subject: Re: [WiX-users] IIS Website Identifier / Site Id
Hi Neil,
This would definitely be a welcome addition to the WiX toolset; and would be
great if you could help make it happen.
For installs targeting IIS6 my view is that the hashed id should be the
default behaviour - but also supporting specification of an explicit
identifier would give alot of flexibility too.
Good luck.
Cheers,
Andrew
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Neil
Sleightholm
Sent: Wednesday, 11 June 2008 5:57 AM
To: WiX Users
Subject: [WiX-users] IIS Website Identifier / Site Id
When you use WiX to create a new website in IIS 6 it creates it with an
Identifier or Site Id of one more than the last website that was created
(this is the same as IIS 5). If you create it manually then IIS sets the
Identifier to a number based on the hash of the site name - the
algorithm for this is explained here on Mike Poulson's blog:
http://blogs.msdn.com/mpoulson/archive/2006/03/06/544893.aspx. To
summarise it creates the hash and then if that Identifier is in use it
just adds one until it finds an unused Identifier.
This method of creating Identifier's based on the hash of the name is
very useful when you have a farm of servers as it means that the
Identifier is not dependent on the order in which installs are run. For
in house websites you can arrange for the website names to have unique
hash values and be sure that all servers in a farm are identical and
even build servers with a subset of the sites that again are identical
to the original install. The identifier is also used for log file path,
so on a farm of servers it helps if the logs are all in known folders.
Now to my point, would it be possible to get this functionality built
into WiX v3?
A company I work for has already done it for WiX v2 but the approach was
to simply change the IIS site creation code to use the hashing method. I
suspect this is not the best approach to this but as we only target IIS
6 servers it hasn't caused a problem.
I am happy to share this code (it is a change to scaweb.cpp) and to try
to implement it in WiX v3 but I would like to know what other people
think about it and how best to approach it. Here are some of the issues
I see:
1. Should this value be automatically generated by the install?
2. Should it be possible to override the identifier value in WiX
when creating a site?
3. Should the default be the hashing method on IIS 6?
4. I haven't used IIS 7, does it use the same hashing scheme?
Neil
Neil Sleightholm
X2 Systems Limited
[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
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