Some of the possible parent configurations that the appliance supports are as listed below:
Several news servers supplying the same groups:
Several news servers can be configured to redundantly serve the same groups, providing enhanced reliability. The appliance provides the following features for managing these configurations:
✔Priorities
If the appliance has to contact a parent news server for information about a group supplied by several news servers, then it contacts the news server with the highest priority.
✔
If several parent news servers supplying the same group have the same priority, the appliance selects a parent news server in
✔Failover
If a request to a parent server fails, the appliance tries the next server in the round robin (of the same priority) and then servers of lower priority.
✔Background retries
Failed servers are retried in the background and are used (restored to their specified priority) when they become available.
Several servers supplying different groups:
Several news servers can be configured with news servers supplying different (disjoint) groups. You can use this feature to spread the load based on group.
Nonstandard ports and network interfaces
You can configure the interface from which to connect to a parent news server port. You can also configure the port on the parent server to which the appliance connects.
Blocking particular groups
You can block particular groups on specified news servers. Clients do not see blocked groups in news server group lists. For information on how to list all block groups by using the from the
Clustering
You can configure large clusters of Intel NetStructure Cache Appliances to act as a single large virtual cache that has all the storage and serving power of the aggregate. The
140Intel NetStructure Cache Appliance Administrator’s Guide
