LPIC-3 High Availability and Storage Clusters study guide
LPIC-3 High Availability and Storage Clusters · Work through your exam, one topic at a time.
LPIC-3 High Availability and Storage Clusters is one of four separate LPIC-3 specialty certifications offered by the Linux Professional Institute, the vendor-neutral certification body behind the multi-level LPIC program. It targets enterprise-level Linux professionals who design, run and recover highly available systems and clustered storage. The current version is 3.0, exam code 306-300; it results from a split of version 2.0 of exam 304, and the previous 304-200 version was available only until June 20th, 2022. To receive the certification you must hold an active LPIC-2 certification and pass the 306 exam. Topics on this exam: High Availability Cluster Management, High Availability Cluster Storage, High Availability Distributed Storage, and Single Node High Availability. The LPIC-3 High Availability and Storage Clusters study guide has 4 sections and about 1,497 words.
01High Availability Cluster Management
This domain tests the cluster control plane: Corosync membership and quorum, Pacemaker scheduling from the CIB, resource agents, constraint scoring, fencing, and operations with pcs and crm mon . Corosync carries membership and messaging; Pacemaker places resources.
365 words, about 2 min02High Availability Cluster Storage
This domain tests shared block storage and cluster filesystems: iSCSI, device-mapper multipath, cluster LVM, DLM, GFS2/OCFS2, and DRBD. The central rule is that only one node may update shared metadata, and no node may mount shared data until locking is active.
382 words, about 2 min03High Availability Distributed Storage
This domain tests storage that survives node loss without shared LUNs: Ceph's RADOS components and GlusterFS volumes. The exam expects you to reason about replica counts, quorum, and recovery rather than memorize only commands.
380 words, about 2 min04Single Node High Availability
This domain tests redundancy inside one host: mdadm RAID, LVM/DM RAID, multipath, network bonding, boot redundancy, and watchdogs. The goal is to survive a disk, path, link, or hung kernel without cluster-wide failover.
370 words, about 2 min