Oracle 12cR1 Rex Cluster introduces a new topology, which allows for a higher level of scalability.
Which four statements accurately describe the new topology’s properties?
A.
Hub and Leaf topologies allow tightly and loosely coupled server membership.
B.
Hub and Leaf topologies support Implicit Server Pools.
C.
Leaf servers are standard as in previous versions.
D.
Leaf servers are light-weight, no shared storage, no peer-to-peer communication and dedicated
to application service.
E.
Hub servers do not support Oracle ASM.
F.
Oracle Flex Cluster 12cR1 supports bare metal and OVM servers in common cluster.
Explanation:
http://oukc.oracle.com/static12/opn/events12/107492/072513_107492_source/index.ht
m
Wrong – E, C,
A cluster is a set of nodes that provide group membership services. Each cluster has a name that is globally unique. Every cluster has one or more Hub nodes. The Hub nodes have access to Oracle ASM disks. Every cluster has at least one private network and one public network. If the cluster is going to use Oracle ASM for storage, it has at least one Oracle ASM network. A single network can be used as both a private and an Oracle ASM network. For security reasons, an Oracle ASM network should never be public. There can be only one Oracle Flex ASM configuration running within a cluster.
Correct- A B D F
D
Leaf Nodes: These nodes are lighter and are not connected among them, neither access the shared storage like the Hub Nodes. Each Leaf Node communicates with the Hub Node that is attached to, and its connected to the cluster via the Hub Node that is linked to.
A
This topology allows *****loosely coupled application servers **** to form a cluster with ^^^^ tightly coupled database servers^^^^^.
Tightly coupled servers are Hub Servers that share storage for database, OCR and Voting devices as well as peer-to-peer communication with other Hub Servers in the cluster.
A loosely coupled server is a Leaf Server that has a loose communication association with a single Hub Server in the cluster and does not require shared storage nor peer-to-peer communication with other Hub or Leaf Servers in the cluster, except to communicate with the Hub to which it is associated
F
Another innovation introduced with Oracle Flex Cluster 12c is the ability to deploy
Metal servers in the same cluster