A. Load balancers are used for performance and scalability reasons only and cannot be used to archive high availability clusters.
B. Load balancers cannot be protected against outages which is why they should always be built on dedicated hardware.
C. Two or more load balancers should be deployed as a cascade that passes packets from one to the other.
D. Two load balancers should be deployed as a failover cluster.
E. No actions are necessary as a load balancer cannot become a single point of failure.
A. Using the lvm command to extend the array.
B. Using the mdadm command with the --add option.
C. By modifying the /proc/mdstat file manually.
D. By running the fsck utility on the array.
A. keepalived
B. ldirectord
C. roundrobind
D. lvproxy
E. vserverd
A. Failover Cluster
B. Active/Passive Cluster
C. Active/Active Cluster
D. Load Balanced Cluster
A. sbd
B. pcs
C. stonith
D. stonith_admin
A. By combining multiple physical volumes into a volume group.
B. By using the lvcreate command with the --raid option.
C. By using the vgcreate command with the --raid option.
D. LVM does not support RAID configurations.
A. To monitor power supply status.
B. To monitor CPU usage and temperature.
C. To monitor disk space and memory usage.
D. To monitor network traffic on the system.
A. <ressources> and <services>
B. <configuration> and <status>
C. <cluster> and <state>
D. <pacemaker> and <corosync>
E. <nodes> and <services>
A. Fencing is the automated stop and restart of cluster services that suffer from software errors.
B. Fencing is the accounting and limitation of disk usage on shared storage.
C. Fencing is the assignment of services to different cluster nodes to avoid interference of the services.
D. Fencing is the disconnection of a failed cluster node from any other cluster resources.
E. Fencing is the forwarding of incoming network connections to backend servers.
A. It monitors the system's CPU usage.
B. It triggers disk checks at regular intervals.
C. It monitors the S.M.A.R.T values of storage devices.
D. It monitors the system's memory usage.
A. To display information about volume groups.
B. To create a new volume group in LVM.
C. To display information about physical volumes.
D. To display information about logical volumes.
