Hello,
There is some questions regarding clustering I've never found a clear /
consistent answer on.
I hope someone can give me the ultimate answers on my questions..
I've tried to generalize a bit to "broaden" the scope for this,
Software
Win2003/2008 32/64 bit - IIS6/IIS7 - CF7/8/9 Enterprise - 32bit/64bit
Hardware
2-x servers with 1-x jrun/coldfusions instances on each (and 2 nics on each -
one connected to the load balancer (via a switch) and one connected to internal
network, db server etc (also via a switch))
Hardware load balancer in front of the servers, sticky sessions set on the load
balancer
x is a number - from 1 to whatever (number of servers and number of instances)
Goal:
One rock stable high performance ColdFusion cluster with session replication
and quick failover when:
* JRun/CF instance crashes
* Physical server crashes
* IIS on server chrashes
The setup for the different software configurations is rather similar ("if 32
bit you must pay attention to this", "if 64 bit you must pay attention to that")
In any configuration the clustering setup is very similar
JRun instances
All new CF instances is created from the default CFusion instance which is shut
down and "never used" after the setup is done (same goes with JRun Admin
Instance)
Internal webserver on every CF instance is active with separate port addresses
and separate instance names (8300 for admin, 8301 for instance one "cfusion1",
8302 for instance two "cfusion2", 8303 for instance 3 "cfusion3" on physical
server #2 etc.)
Every CF instance have the remote port (JNDI port) set unique (both server wide
and cluster wide)
Clustering setup
On one server (CFadmin / Instance manager) all remote instances is registered
On the same server one cluster is created with round robin / sticky sessions /
and replicate sessions set
All instances is added to the clusters (for example 6 instances on 3 physical
servers on the same subnet)
(After this the servers is physically restarted)
Connector setup
On every physical server the Web Server Configuration Tool is run
On every physical server the IIS webserver is configured with this settings:
JRun Host: [The server where cluster was created initially]
JRun Server: [The cluster name]
All IIS websites (The server has multiple websites, hundreds)
Configure web server for cf 7/8/9 apps
This is where it gets confusing and I'm thinking I must have missed something
vital during the setup procedure above.
If the server where the cluster was created initially goes down, all instances
goes down?
Session replication is not very stable (have not tried on 9 yet)
Is there something very wrong with the above configuration and setup methods?
If so, what/where/why? ;)
I've seen descriptions where the same cluster (same cluster name) is created on
every physical server, and the connector setup is run against localhost, but
that doesn't make sense either.. ?
I've been googling for answers on all this many times, since no blog or site
I've found have everything covered there are some "black holes" in the
descriptions for setting up a cluster.
It could also be that the hardware setup is the problem, but I'm hoping for
some pointers here before I take a deep look on the HW side of it (which seems
to be running just fine on the different setups I've tested)
Thanks for any insight on this
Helge
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~|
Order the Adobe Coldfusion Anthology now!
http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion
Archive:
http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:341163
Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm
Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
