Lpi 306-300 Exam : LPIC-3 Exam 306: High Availability and Storage Clusters

  • Exam Code: 306-300
  • Exam Name: LPIC-3 Exam 306: High Availability and Storage Clusters
  • Updated: Sep 12, 2026
  • Q & A: 202 Questions and Answers

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Lpi 306-300 Exam Syllabus Topics:

SectionObjectives
High Availability Distributed Storage- Ceph
  • 1. CRUSH maps
  • 2. RADOS components
  • 3. Ceph architecture
- Gluster
  • 1. GlusterFS deployment
  • 2. Replication and fault tolerance
Single Node High Availability- Hardware Monitoring
  • 1. RAID monitoring and recovery
  • 2. SMART monitoring
- System Availability
  • 1. UPS integration
  • 2. Watchdog services
  • 3. Service supervision
High Availability Cluster Management- High Availability Concepts and Theory
  • 1. Disaster recovery and redundancy concepts
  • 2. Cluster architectures and recovery mechanisms
  • 3. High Availability and Site Reliability Engineering
- Load Balanced Clusters
  • 1. HAProxy deployment and management
  • 2. ldirectord configuration
  • 3. keepalived configuration
  • 4. VRRP fundamentals
  • 5. LVS and IPVS concepts
- Cluster Resource Management
  • 1. Resource allocation and failover
  • 2. Fencing and quorum management
  • 3. Pacemaker cluster management
High Availability Cluster Storage- Shared Storage Technologies
  • 1. Clustered LVM
  • 2. Multipath I/O
  • 3. SAN storage integration
- Cluster File Systems
  • 1. GFS2
  • 2. OCFS2
- Storage Replication
  • 1. DRBD configuration and management
  • 2. Data synchronization and failover

Lpi LPIC-3 Exam 306: High Availability and Storage Clusters Sample Questions:

Question #1

What are the different replication modes available in DRBD?

  • A. Synchronous and Asynchronous
  • B. Protocol A, B, and C
  • C. One-way and Two-way
  • D. Active and Passive
Answer: B
Question #2

While setting up a load-balanced HTTP service, Linux Virtual Server was configured with the commands:
ipvsadm -A -t 198.51.100.2:80 -s rr
ipvsadm -a -t 198.51.100.2:80 -r 192.168.10.1:80 -m
ipvsadm -a -t 198.51.100.2:80 -r 192.168.10.2:80 -m and all backend servers are using the LVS host as the default router.
Which additional command has to be issued on the LVS host in order to correctly handle incoming HTTP traffic?

  • A. ipvsadmin -L -n
  • B. echo "1" > /proc/sys/net/ipv4/ip_forward
  • C. iptables -t nat -Z
  • D. netstat -r
  • E. ipmasq -A 192.168.10.1 -A 192.168.10.2 -p tcp --dport www -j DEMASQ
Answer: B
Question #3

How can you recover a RAID device after a failure?

  • A. By replacing the failed disk and running the mdadm --rebuild command.
  • B. By running the fsck utility on the array to fix any disk errors.
  • C. By reformatting the RAID device and rebuilding the array from scratch.
  • D. By modifying the /proc/sys/dev/raid/ file to restore the array.
Answer: A
Question #4

What does a Service Level Agreement (SLA) typically define in the context of high availability?

  • A. The number of resources shared between nodes
  • B. The maximum number of nodes in a cluster
  • C. The duration of downtime allowed for a system
  • D. The type of load balancing algorithm used
Answer: C
Question #5

Which O2CB mode should be used for OCFS2 integration with heartbeat?

  • A. kernel
  • B. heartbeat
  • C. user
  • D. dlm
Answer: C

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