Intergraph WebScale User Manual page 62

WebScale™
webscale stop mycluster
webscale setup
webscale reload
webscale start
mycluster:2
webscale disable 80
webscale ip2mac
mycluster
WebScale hosts can be configured to join the cluster automatically upon startup or to
wait for the webscale start command by checking the initial state box in the
WebScale Setup dialog. This command can be used with the webscale stop
command to change cluster parameters for the local host without taking entire cluster
off-line.
You can modify WebScale's parameters, for example, add a port rule, without
disrupting the cluster's service to the clients. To do this, take each host out of the
cluster in turn, update its parameters, and then return it to the cluster. During this
process, other cluster hosts will detect inconsistencies in the rules, and they will handle
these inconsistencies in a manner that minimizes disruption of service to the clients.
For more details on how inconsistencies are handled by WebScale, please refer to the
section Error Detection and Handling.
The webscale disable and webscale enable commands can be used to tailor
how your cluster responds to various failures. For example, if your SNMP monitoring
program notices that a web server application on one of the hosts has failed, it can issue
the command webscale disable 80 to prevent that host from accepting any
further client requests to the web server port and to cause other cluster hosts to handle
its load. Once the web server has been restarted, the webscale enable 80
command can be issued to allow the host to resume handling a portion of the cluster's
network load for this port.
Output from the webscale display command for each of the hosts in the cluster
stops cluster operations for all cluster
hosts in mycluster
runs WebScale Setup dialog to adjust
parameters for local host
reload parameters for local host
re-starts cluster operations for host 2 in
mycluster
disables the local host's handling of
new network traffic for the Web server
port
displays MAC addresses corresponding
to mycluster
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User's Guide