Which three statements are true concerning node evictions and reboots performed by Oracle Clusterware 12c?
A.
All node evictions require that the evicted node or nodes be rebooted.
B.
A node whose performance is severely degraded can be evicted.
C.
The OCSSD process may evict a node after an escalation request from a database instance LMON
process.
D.
The CSSDMONITOR process can request a node eviction.
E.
The OCLSKD process is used for node eviction requests originating on the node to be evicted.
F.
The reboot advisory broadcasts reboot decisions only over the interconnect.
Explanation:
D: The cssdagent and cssdmonitor provide the following services to guarantee data integrity:
Monitors the CSS daemon; if the CSS daemon stops, then it shuts down the node
Monitors the node scheduling to verify that the node is not hung, and shuts down the node on recovery from
a hang.
Note If the Oracle Clusterware itself is working perfectly but one of the RAC instances is hanging , the database
LMON process will request a member kill escalation and ask the CSS process to remove the hanging
database instance from the cluster.
On a Linux/Unix system CSS consists of ocssd.bin, cssdmonitor, and cssdagent.
E: Cluster kill daemon (oclskd) handles instance/node evictions requests that have been escalated to the
Cluster Synchronization Service (CSS).
Incorrect Answers:
C: Ocssd manages cluster node membership and runs as the oracle user; failure of this process results in a
node restart.
B,C,E