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A minimum of Windows NT Service Pack 4 must be installed on each member.
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The Streams Environment must be added to Network Protocols on NT 4.0 based systems. On Windows
2000 systems, the installation procedure will automatically configure Streams.
1. Right mouse on the Network Neighborhood.
2. Select Properties.
3. Select Protocols.
4. Click Add.
5. Select Streams Environment, and click OK.
6. Select Control Panel, select Device, and then select Enable Streams.
Customizing the Web Server's Response When No Resources are Available in a Cluster
When all web servers in a ClusterCATS cluster are busy and/or restricted, a browser's request to any member of
the cluster will receive a HTTP 503 (server too busy) failure response from the server. For example, trying to
browse index.html on server KITCAT in the completely busy cluster KitKatCluster will return the following error
response:
index.html is not currently available in cluster KitKatCluster.
Please try again later.
To override this default 503 response with one more appropriate for your web site, you must edit the ClusterCATS
server entries in the registry for your OS platform.
In the following procedure, you will add a value called "ErrorUrl" to each desired ClusterCATS server registry key.
This value will specify the name of a file, relative to the server's document root, containing the text you want
browsers to see when all servers in the cluster are unavailable. The procedure differs between Window NT and
Solaris/Linux platforms.
For Windows NT:
1. Edit the registry and open the key:
HKEY_LOCAL_MACHINE | SYSTEM | CurrentControlSet | Services | BrightTiger | Servers
Under the Servers key, you should see the names of the current cluster members for this system. These
are the individual "server keys" that you will modify in the next step.
2. For each cluster member that you wish to customize for the 503 error response, create the following
REG_SZ value under its server key:
ErrorUrl NameOfErrorFile.htm
Replace "NameOfErrorFile.htm" with the name of the file containing your selected error text, relative to this
server's web document root. For example, the sample file above might be physically located in
C:/Inetpub/wwwroot/NameOfErrorFile.html.
3. Close the registry editor.
4. Test the change by restricting all servers in the cluster -- a one-node cluster simplifies this -- and hitting a
server with a browser. You should see your customized error text returned.
For UNIX:
NOTE: Solaris/Linux versions of ClusterCATS user a file called bt.registry to emulate aspects of NT registry
features. This is an ordinary text file with stringent formatting requirements. This procedure requires hand-editing
of this file. Be careful!
Page 18 of 26Release Notes - ColdFusion Server 4.5.1
08/22/2000file://C:\TEMP\cfserver451_release_notes.htm
(36 Seiten)
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