methods: • Giving out a brief introduction to the topic. • Explaining why the topic is important from learner's perspective. • Providing a link from the previous to the current topic. 4.7. Main Body You could presentation slide, which highlight the main points. • Reiterating how the topic relates with the learner's job. Student Guide Copyright © 2009 Canonical Limited Chapter 1. Introducing Ubuntu Objectives

BLOCKS Use proven technologies - don’t reinvent the wheel • RAFT replication – http://raft.github.io ● Open source Java implementation of RAFT - Apache Ratis Library. • Storage Containers – Unit of replication Storage Container Manager {Manage Containers, allocate blocks, certificates, datanodes} HA Raft Ring HA Raft Ring Immutable Data blocks Snapshotting the object NameSpace is enough to get point in time