Curriculum planned

Stage 06 · Hadoop Ecosystem

Apache ZooKeeper

A complete Apache ZooKeeper course covering distributed coordination, the replicated znode data model, sessions and watches, Zab/quorum behavior, ensemble design, client semantics, ACLs and authentication, TLS/SASL, dynamic reconfiguration, observers, recipes, Apache Curator, persistence, monitoring, failure recovery, upgrades, containers/Kubernetes, and production coordination design.

Browse planned curriculum Back to all courses

27planned chapters

135reserved lesson paths

Intermediate → Advancedlearning level

Plannedcourse state

Coverage baselineApache ZooKeeper 3.9.5 current and 3.8.6 stable lines, including modern AdminServer/metrics, TLS, dynamic reconfiguration, observers, multi operations, container/TTL nodes, four-letter-word controls, and production ensemble operations

Course brief

Use ZooKeeper as a coordination system rather than a general database by understanding exactly what its consistency, ordering, session, watch, quorum, and failure semantics do—and do not—guarantee.

This syllabus deliberately separates foundations, data/model semantics, internals, reliability, security, performance, operations, and production design so advanced material is not compressed into generic catch-all chapters.

By the end

You will be able to

Explain ZooKeeper’s znode, version, session, watch, quorum, and Zab semantics well enough to predict behavior during failures
Design safe coordination primitives such as leader election, locks, barriers, membership, configuration, and service discovery without common herd/race bugs
Secure and operate ensembles with ACLs, SASL/TLS, snapshots, transaction logs, autopurge, metrics, AdminServer, capacity planning, and recovery drills
Use client libraries and Apache Curator recipes while reasoning about retries, idempotency, connection loss, session expiration, and fencing
Design a production ensemble and prove its behavior under node loss, partitions, rolling upgrades, disk pressure, and client churn

Complete planned syllabus

27 chapters · 135 lesson paths.

Every lesson path is reserved now but intentionally not linked until its lesson HTML is actually published. The sequence moves from foundations through advanced implementation, architecture, operations, reliability, security, tuning, and a production capstone.

Chapter 1

ZooKeeper Foundations: Coordination Problems, When to Use It, When Not to Use It, and Local Lab Setup

5 lessons

ZooKeeper Foundations: Coordination Problems, When to Use It, When Not to Use It, and Local Lab Setup: Concepts, Terminology, Architecture, and Mental ModelPlanned lesson · reserved path Chapter01/Lesson1.html

Planned02

ZooKeeper Foundations: Coordination Problems, When to Use It, When Not to Use It, and Local Lab Setup: Guided Hands-On Workflow, Commands, APIs, and ConfigurationPlanned lesson · reserved path Chapter01/Lesson2.html

Planned03

ZooKeeper Foundations: Coordination Problems, When to Use It, When Not to Use It, and Local Lab Setup: Design Choices, Scaling Behavior, Compatibility, and TradeoffsPlanned lesson · reserved path Chapter01/Lesson3.html

Planned04

ZooKeeper Foundations: Coordination Problems, When to Use It, When Not to Use It, and Local Lab Setup: Failure Modes, Diagnostics, Security, Reliability, and PerformancePlanned lesson · reserved path Chapter01/Lesson4.html

Planned05

Checkpoint Lab — ZooKeeper Foundations: Coordination Problems, When to Use It, When Not to Use It, and Local Lab Setup: Build, Test, Measure, Troubleshoot, and Explain the ResultPlanned lesson · reserved path Chapter01/Lesson5.html

Planned

Chapter 2

ZooKeeper Architecture: Ensemble, Leader, Followers, Clients, Request Paths, and Service Guarantees

5 lessons

ZooKeeper Architecture: Ensemble, Leader, Followers, Clients, Request Paths, and Service Guarantees: Concepts, Terminology, Architecture, and Mental ModelPlanned lesson · reserved path Chapter02/Lesson1.html

Planned02

ZooKeeper Architecture: Ensemble, Leader, Followers, Clients, Request Paths, and Service Guarantees: Guided Hands-On Workflow, Commands, APIs, and ConfigurationPlanned lesson · reserved path Chapter02/Lesson2.html

Planned03

ZooKeeper Architecture: Ensemble, Leader, Followers, Clients, Request Paths, and Service Guarantees: Design Choices, Scaling Behavior, Compatibility, and TradeoffsPlanned lesson · reserved path Chapter02/Lesson3.html

Planned04

ZooKeeper Architecture: Ensemble, Leader, Followers, Clients, Request Paths, and Service Guarantees: Failure Modes, Diagnostics, Security, Reliability, and PerformancePlanned lesson · reserved path Chapter02/Lesson4.html

Planned05

Checkpoint Lab — ZooKeeper Architecture: Ensemble, Leader, Followers, Clients, Request Paths, and Service Guarantees: Build, Test, Measure, Troubleshoot, and Explain the ResultPlanned lesson · reserved path Chapter02/Lesson5.html

Planned

Chapter 3

Znode Data Model: Paths, Byte Data, Metadata, Versions, Stat Fields, and Namespace Design

5 lessons

Znode Data Model: Paths, Byte Data, Metadata, Versions, Stat Fields, and Namespace Design: Concepts, Terminology, Architecture, and Mental ModelPlanned lesson · reserved path Chapter03/Lesson1.html

Planned02

Znode Data Model: Paths, Byte Data, Metadata, Versions, Stat Fields, and Namespace Design: Guided Hands-On Workflow, Commands, APIs, and ConfigurationPlanned lesson · reserved path Chapter03/Lesson2.html

Planned03

Znode Data Model: Paths, Byte Data, Metadata, Versions, Stat Fields, and Namespace Design: Design Choices, Scaling Behavior, Compatibility, and TradeoffsPlanned lesson · reserved path Chapter03/Lesson3.html

Planned04

Znode Data Model: Paths, Byte Data, Metadata, Versions, Stat Fields, and Namespace Design: Failure Modes, Diagnostics, Security, Reliability, and PerformancePlanned lesson · reserved path Chapter03/Lesson4.html

Planned05

Checkpoint Lab — Znode Data Model: Paths, Byte Data, Metadata, Versions, Stat Fields, and Namespace Design: Build, Test, Measure, Troubleshoot, and Explain the ResultPlanned lesson · reserved path Chapter03/Lesson5.html

Planned

Chapter 4

Persistent, Ephemeral, Sequential, Container, and TTL Nodes: Lifecycle Semantics and Appropriate Uses

5 lessons

Persistent, Ephemeral, Sequential, Container, and TTL Nodes: Lifecycle Semantics and Appropriate Uses: Concepts, Terminology, Architecture, and Mental ModelPlanned lesson · reserved path Chapter04/Lesson1.html

Planned02

Persistent, Ephemeral, Sequential, Container, and TTL Nodes: Lifecycle Semantics and Appropriate Uses: Guided Hands-On Workflow, Commands, APIs, and ConfigurationPlanned lesson · reserved path Chapter04/Lesson2.html

Planned03

Persistent, Ephemeral, Sequential, Container, and TTL Nodes: Lifecycle Semantics and Appropriate Uses: Design Choices, Scaling Behavior, Compatibility, and TradeoffsPlanned lesson · reserved path Chapter04/Lesson3.html

Planned04

Persistent, Ephemeral, Sequential, Container, and TTL Nodes: Lifecycle Semantics and Appropriate Uses: Failure Modes, Diagnostics, Security, Reliability, and PerformancePlanned lesson · reserved path Chapter04/Lesson4.html

Planned05

Checkpoint Lab — Persistent, Ephemeral, Sequential, Container, and TTL Nodes: Lifecycle Semantics and Appropriate Uses: Build, Test, Measure, Troubleshoot, and Explain the ResultPlanned lesson · reserved path Chapter04/Lesson5.html

Planned

Chapter 5

Sessions, Heartbeats, Session Timeout, Ephemeral Ownership, Reconnection, and Session Expiration

5 lessons

Sessions, Heartbeats, Session Timeout, Ephemeral Ownership, Reconnection, and Session Expiration: Concepts, Terminology, Architecture, and Mental ModelPlanned lesson · reserved path Chapter05/Lesson1.html

Planned02

Sessions, Heartbeats, Session Timeout, Ephemeral Ownership, Reconnection, and Session Expiration: Guided Hands-On Workflow, Commands, APIs, and ConfigurationPlanned lesson · reserved path Chapter05/Lesson2.html

Planned03

Sessions, Heartbeats, Session Timeout, Ephemeral Ownership, Reconnection, and Session Expiration: Design Choices, Scaling Behavior, Compatibility, and TradeoffsPlanned lesson · reserved path Chapter05/Lesson3.html

Planned04

Sessions, Heartbeats, Session Timeout, Ephemeral Ownership, Reconnection, and Session Expiration: Failure Modes, Diagnostics, Security, Reliability, and PerformancePlanned lesson · reserved path Chapter05/Lesson4.html

Planned05

Checkpoint Lab — Sessions, Heartbeats, Session Timeout, Ephemeral Ownership, Reconnection, and Session Expiration: Build, Test, Measure, Troubleshoot, and Explain the ResultPlanned lesson · reserved path Chapter05/Lesson5.html

Planned

Chapter 6

Watches and Event Delivery: One-Shot Semantics, Persistent Watches, Ordering, Missed-State Risks, and Cache Design

5 lessons

Watches and Event Delivery: One-Shot Semantics, Persistent Watches, Ordering, Missed-State Risks, and Cache Design: Concepts, Terminology, Architecture, and Mental ModelPlanned lesson · reserved path Chapter06/Lesson1.html

Planned02

Watches and Event Delivery: One-Shot Semantics, Persistent Watches, Ordering, Missed-State Risks, and Cache Design: Guided Hands-On Workflow, Commands, APIs, and ConfigurationPlanned lesson · reserved path Chapter06/Lesson2.html

Planned03

Watches and Event Delivery: One-Shot Semantics, Persistent Watches, Ordering, Missed-State Risks, and Cache Design: Design Choices, Scaling Behavior, Compatibility, and TradeoffsPlanned lesson · reserved path Chapter06/Lesson3.html

Planned04

Watches and Event Delivery: One-Shot Semantics, Persistent Watches, Ordering, Missed-State Risks, and Cache Design: Failure Modes, Diagnostics, Security, Reliability, and PerformancePlanned lesson · reserved path Chapter06/Lesson4.html

Planned05

Checkpoint Lab — Watches and Event Delivery: One-Shot Semantics, Persistent Watches, Ordering, Missed-State Risks, and Cache Design: Build, Test, Measure, Troubleshoot, and Explain the ResultPlanned lesson · reserved path Chapter06/Lesson5.html

Planned

Chapter 7

Read and Write Consistency: Linearizable Writes, FIFO Client Ordering, sync(), Stale Reads, and Visibility

5 lessons

Read and Write Consistency: Linearizable Writes, FIFO Client Ordering, sync(), Stale Reads, and Visibility: Concepts, Terminology, Architecture, and Mental ModelPlanned lesson · reserved path Chapter07/Lesson1.html

Planned02

Read and Write Consistency: Linearizable Writes, FIFO Client Ordering, sync(), Stale Reads, and Visibility: Guided Hands-On Workflow, Commands, APIs, and ConfigurationPlanned lesson · reserved path Chapter07/Lesson2.html

Planned03

Read and Write Consistency: Linearizable Writes, FIFO Client Ordering, sync(), Stale Reads, and Visibility: Design Choices, Scaling Behavior, Compatibility, and TradeoffsPlanned lesson · reserved path Chapter07/Lesson3.html

Planned04

Read and Write Consistency: Linearizable Writes, FIFO Client Ordering, sync(), Stale Reads, and Visibility: Failure Modes, Diagnostics, Security, Reliability, and PerformancePlanned lesson · reserved path Chapter07/Lesson4.html

Planned05

Checkpoint Lab — Read and Write Consistency: Linearizable Writes, FIFO Client Ordering, sync(), Stale Reads, and Visibility: Build, Test, Measure, Troubleshoot, and Explain the ResultPlanned lesson · reserved path Chapter07/Lesson5.html

Planned

Chapter 8

Zab Atomic Broadcast: Epochs, Proposals, zxid Ordering, Leader Election, Commit, and Recovery

5 lessons

Zab Atomic Broadcast: Epochs, Proposals, zxid Ordering, Leader Election, Commit, and Recovery: Concepts, Terminology, Architecture, and Mental ModelPlanned lesson · reserved path Chapter08/Lesson1.html

Planned02

Zab Atomic Broadcast: Epochs, Proposals, zxid Ordering, Leader Election, Commit, and Recovery: Guided Hands-On Workflow, Commands, APIs, and ConfigurationPlanned lesson · reserved path Chapter08/Lesson2.html

Planned03

Zab Atomic Broadcast: Epochs, Proposals, zxid Ordering, Leader Election, Commit, and Recovery: Design Choices, Scaling Behavior, Compatibility, and TradeoffsPlanned lesson · reserved path Chapter08/Lesson3.html

Planned04

Zab Atomic Broadcast: Epochs, Proposals, zxid Ordering, Leader Election, Commit, and Recovery: Failure Modes, Diagnostics, Security, Reliability, and PerformancePlanned lesson · reserved path Chapter08/Lesson4.html

Planned05

Checkpoint Lab — Zab Atomic Broadcast: Epochs, Proposals, zxid Ordering, Leader Election, Commit, and Recovery: Build, Test, Measure, Troubleshoot, and Explain the ResultPlanned lesson · reserved path Chapter08/Lesson5.html

Planned

Chapter 9

Quorums and Ensemble Sizing: Majority Math, Odd-Sized Ensembles, Failure Domains, Latency, and Availability

5 lessons

Quorums and Ensemble Sizing: Majority Math, Odd-Sized Ensembles, Failure Domains, Latency, and Availability: Concepts, Terminology, Architecture, and Mental ModelPlanned lesson · reserved path Chapter09/Lesson1.html

Planned02

Quorums and Ensemble Sizing: Majority Math, Odd-Sized Ensembles, Failure Domains, Latency, and Availability: Guided Hands-On Workflow, Commands, APIs, and ConfigurationPlanned lesson · reserved path Chapter09/Lesson2.html

Planned03

Quorums and Ensemble Sizing: Majority Math, Odd-Sized Ensembles, Failure Domains, Latency, and Availability: Design Choices, Scaling Behavior, Compatibility, and TradeoffsPlanned lesson · reserved path Chapter09/Lesson3.html

Planned04

Quorums and Ensemble Sizing: Majority Math, Odd-Sized Ensembles, Failure Domains, Latency, and Availability: Failure Modes, Diagnostics, Security, Reliability, and PerformancePlanned lesson · reserved path Chapter09/Lesson4.html

Planned05

Checkpoint Lab — Quorums and Ensemble Sizing: Majority Math, Odd-Sized Ensembles, Failure Domains, Latency, and Availability: Build, Test, Measure, Troubleshoot, and Explain the ResultPlanned lesson · reserved path Chapter09/Lesson5.html

Planned

Chapter 10

Client API Semantics: create/get/set/delete/exists/getChildren, Versions, Conditional Updates, and Multi Transactions

5 lessons

Client API Semantics: create/get/set/delete/exists/getChildren, Versions, Conditional Updates, and Multi Transactions: Concepts, Terminology, Architecture, and Mental ModelPlanned lesson · reserved path Chapter10/Lesson1.html

Planned02

Client API Semantics: create/get/set/delete/exists/getChildren, Versions, Conditional Updates, and Multi Transactions: Guided Hands-On Workflow, Commands, APIs, and ConfigurationPlanned lesson · reserved path Chapter10/Lesson2.html

Planned03

Client API Semantics: create/get/set/delete/exists/getChildren, Versions, Conditional Updates, and Multi Transactions: Design Choices, Scaling Behavior, Compatibility, and TradeoffsPlanned lesson · reserved path Chapter10/Lesson3.html

Planned04

Client API Semantics: create/get/set/delete/exists/getChildren, Versions, Conditional Updates, and Multi Transactions: Failure Modes, Diagnostics, Security, Reliability, and PerformancePlanned lesson · reserved path Chapter10/Lesson4.html

Planned05

Checkpoint Lab — Client API Semantics: create/get/set/delete/exists/getChildren, Versions, Conditional Updates, and Multi Transactions: Build, Test, Measure, Troubleshoot, and Explain the ResultPlanned lesson · reserved path Chapter10/Lesson5.html

Planned

Chapter 11

Connection Loss, Retries, Idempotency, Ambiguous Outcomes, and Safe Client-Side Recovery Patterns

5 lessons

Connection Loss, Retries, Idempotency, Ambiguous Outcomes, and Safe Client-Side Recovery Patterns: Concepts, Terminology, Architecture, and Mental ModelPlanned lesson · reserved path Chapter11/Lesson1.html

Planned02

Connection Loss, Retries, Idempotency, Ambiguous Outcomes, and Safe Client-Side Recovery Patterns: Guided Hands-On Workflow, Commands, APIs, and ConfigurationPlanned lesson · reserved path Chapter11/Lesson2.html

Planned03

Connection Loss, Retries, Idempotency, Ambiguous Outcomes, and Safe Client-Side Recovery Patterns: Design Choices, Scaling Behavior, Compatibility, and TradeoffsPlanned lesson · reserved path Chapter11/Lesson3.html

Planned04

Connection Loss, Retries, Idempotency, Ambiguous Outcomes, and Safe Client-Side Recovery Patterns: Failure Modes, Diagnostics, Security, Reliability, and PerformancePlanned lesson · reserved path Chapter11/Lesson4.html

Planned05

Checkpoint Lab — Connection Loss, Retries, Idempotency, Ambiguous Outcomes, and Safe Client-Side Recovery Patterns: Build, Test, Measure, Troubleshoot, and Explain the ResultPlanned lesson · reserved path Chapter11/Lesson5.html

Planned

Chapter 12

ACLs, Authentication Schemes, Digest/SASL, Superuser Risks, Least Privilege, and Namespace Isolation

5 lessons

ACLs, Authentication Schemes, Digest/SASL, Superuser Risks, Least Privilege, and Namespace Isolation: Concepts, Terminology, Architecture, and Mental ModelPlanned lesson · reserved path Chapter12/Lesson1.html

Planned02

ACLs, Authentication Schemes, Digest/SASL, Superuser Risks, Least Privilege, and Namespace Isolation: Guided Hands-On Workflow, Commands, APIs, and ConfigurationPlanned lesson · reserved path Chapter12/Lesson2.html

Planned03

ACLs, Authentication Schemes, Digest/SASL, Superuser Risks, Least Privilege, and Namespace Isolation: Design Choices, Scaling Behavior, Compatibility, and TradeoffsPlanned lesson · reserved path Chapter12/Lesson3.html

Planned04

ACLs, Authentication Schemes, Digest/SASL, Superuser Risks, Least Privilege, and Namespace Isolation: Failure Modes, Diagnostics, Security, Reliability, and PerformancePlanned lesson · reserved path Chapter12/Lesson4.html

Planned05

Checkpoint Lab — ACLs, Authentication Schemes, Digest/SASL, Superuser Risks, Least Privilege, and Namespace Isolation: Build, Test, Measure, Troubleshoot, and Explain the ResultPlanned lesson · reserved path Chapter12/Lesson5.html

Planned

Chapter 13

TLS/mTLS, Secure Client-Server and Quorum Communication, Certificate Rotation, and Network Hardening

5 lessons

TLS/mTLS, Secure Client-Server and Quorum Communication, Certificate Rotation, and Network Hardening: Concepts, Terminology, Architecture, and Mental ModelPlanned lesson · reserved path Chapter13/Lesson1.html

Planned02

TLS/mTLS, Secure Client-Server and Quorum Communication, Certificate Rotation, and Network Hardening: Guided Hands-On Workflow, Commands, APIs, and ConfigurationPlanned lesson · reserved path Chapter13/Lesson2.html

Planned03

TLS/mTLS, Secure Client-Server and Quorum Communication, Certificate Rotation, and Network Hardening: Design Choices, Scaling Behavior, Compatibility, and TradeoffsPlanned lesson · reserved path Chapter13/Lesson3.html

Planned04

TLS/mTLS, Secure Client-Server and Quorum Communication, Certificate Rotation, and Network Hardening: Failure Modes, Diagnostics, Security, Reliability, and PerformancePlanned lesson · reserved path Chapter13/Lesson4.html

Planned05

Checkpoint Lab — TLS/mTLS, Secure Client-Server and Quorum Communication, Certificate Rotation, and Network Hardening: Build, Test, Measure, Troubleshoot, and Explain the ResultPlanned lesson · reserved path Chapter13/Lesson5.html

Planned

Chapter 14

Dynamic Reconfiguration: Adding/Removing Servers, Membership Changes, Reconfig Safety, and Rolling Topology Changes

5 lessons

Dynamic Reconfiguration: Adding/Removing Servers, Membership Changes, Reconfig Safety, and Rolling Topology Changes: Concepts, Terminology, Architecture, and Mental ModelPlanned lesson · reserved path Chapter14/Lesson1.html

Planned02

Dynamic Reconfiguration: Adding/Removing Servers, Membership Changes, Reconfig Safety, and Rolling Topology Changes: Guided Hands-On Workflow, Commands, APIs, and ConfigurationPlanned lesson · reserved path Chapter14/Lesson2.html

Planned03

Dynamic Reconfiguration: Adding/Removing Servers, Membership Changes, Reconfig Safety, and Rolling Topology Changes: Design Choices, Scaling Behavior, Compatibility, and TradeoffsPlanned lesson · reserved path Chapter14/Lesson3.html

Planned04

Dynamic Reconfiguration: Adding/Removing Servers, Membership Changes, Reconfig Safety, and Rolling Topology Changes: Failure Modes, Diagnostics, Security, Reliability, and PerformancePlanned lesson · reserved path Chapter14/Lesson4.html

Planned05

Checkpoint Lab — Dynamic Reconfiguration: Adding/Removing Servers, Membership Changes, Reconfig Safety, and Rolling Topology Changes: Build, Test, Measure, Troubleshoot, and Explain the ResultPlanned lesson · reserved path Chapter14/Lesson5.html

Planned

Chapter 15

Observers and Read Scaling: Non-Voting Members, Learners, Locality, Multi-Site Designs, and Failure Tradeoffs

5 lessons

Observers and Read Scaling: Non-Voting Members, Learners, Locality, Multi-Site Designs, and Failure Tradeoffs: Concepts, Terminology, Architecture, and Mental ModelPlanned lesson · reserved path Chapter15/Lesson1.html

Planned02

Observers and Read Scaling: Non-Voting Members, Learners, Locality, Multi-Site Designs, and Failure Tradeoffs: Guided Hands-On Workflow, Commands, APIs, and ConfigurationPlanned lesson · reserved path Chapter15/Lesson2.html

Planned03

Observers and Read Scaling: Non-Voting Members, Learners, Locality, Multi-Site Designs, and Failure Tradeoffs: Design Choices, Scaling Behavior, Compatibility, and TradeoffsPlanned lesson · reserved path Chapter15/Lesson3.html

Planned04

Observers and Read Scaling: Non-Voting Members, Learners, Locality, Multi-Site Designs, and Failure Tradeoffs: Failure Modes, Diagnostics, Security, Reliability, and PerformancePlanned lesson · reserved path Chapter15/Lesson4.html

Planned05

Checkpoint Lab — Observers and Read Scaling: Non-Voting Members, Learners, Locality, Multi-Site Designs, and Failure Tradeoffs: Build, Test, Measure, Troubleshoot, and Explain the ResultPlanned lesson · reserved path Chapter15/Lesson5.html

Planned

Chapter 16

Leader Election, Fencing Tokens, and Split-Brain-Safe Active/Standby Coordination Recipes

5 lessons

Leader Election, Fencing Tokens, and Split-Brain-Safe Active/Standby Coordination Recipes: Concepts, Terminology, Architecture, and Mental ModelPlanned lesson · reserved path Chapter16/Lesson1.html

Planned02

Leader Election, Fencing Tokens, and Split-Brain-Safe Active/Standby Coordination Recipes: Guided Hands-On Workflow, Commands, APIs, and ConfigurationPlanned lesson · reserved path Chapter16/Lesson2.html

Planned03

Leader Election, Fencing Tokens, and Split-Brain-Safe Active/Standby Coordination Recipes: Design Choices, Scaling Behavior, Compatibility, and TradeoffsPlanned lesson · reserved path Chapter16/Lesson3.html

Planned04

Leader Election, Fencing Tokens, and Split-Brain-Safe Active/Standby Coordination Recipes: Failure Modes, Diagnostics, Security, Reliability, and PerformancePlanned lesson · reserved path Chapter16/Lesson4.html

Planned05

Checkpoint Lab — Leader Election, Fencing Tokens, and Split-Brain-Safe Active/Standby Coordination Recipes: Build, Test, Measure, Troubleshoot, and Explain the ResultPlanned lesson · reserved path Chapter16/Lesson5.html

Planned

Chapter 17

Distributed Locks, Shared Locks, Barriers, Queues, Group Membership, and the Thundering-Herd Problem

5 lessons

Distributed Locks, Shared Locks, Barriers, Queues, Group Membership, and the Thundering-Herd Problem: Concepts, Terminology, Architecture, and Mental ModelPlanned lesson · reserved path Chapter17/Lesson1.html

Planned02

Distributed Locks, Shared Locks, Barriers, Queues, Group Membership, and the Thundering-Herd Problem: Guided Hands-On Workflow, Commands, APIs, and ConfigurationPlanned lesson · reserved path Chapter17/Lesson2.html

Planned03

Distributed Locks, Shared Locks, Barriers, Queues, Group Membership, and the Thundering-Herd Problem: Design Choices, Scaling Behavior, Compatibility, and TradeoffsPlanned lesson · reserved path Chapter17/Lesson3.html

Planned04

Distributed Locks, Shared Locks, Barriers, Queues, Group Membership, and the Thundering-Herd Problem: Failure Modes, Diagnostics, Security, Reliability, and PerformancePlanned lesson · reserved path Chapter17/Lesson4.html

Planned05

Checkpoint Lab — Distributed Locks, Shared Locks, Barriers, Queues, Group Membership, and the Thundering-Herd Problem: Build, Test, Measure, Troubleshoot, and Explain the ResultPlanned lesson · reserved path Chapter17/Lesson5.html

Planned

Chapter 18

Apache Curator: Framework, Retry Policies, Connection State, Recipes, Caches, and Testing Utilities

5 lessons

Apache Curator: Framework, Retry Policies, Connection State, Recipes, Caches, and Testing Utilities: Concepts, Terminology, Architecture, and Mental ModelPlanned lesson · reserved path Chapter18/Lesson1.html

Planned02

Apache Curator: Framework, Retry Policies, Connection State, Recipes, Caches, and Testing Utilities: Guided Hands-On Workflow, Commands, APIs, and ConfigurationPlanned lesson · reserved path Chapter18/Lesson2.html

Planned03

Apache Curator: Framework, Retry Policies, Connection State, Recipes, Caches, and Testing Utilities: Design Choices, Scaling Behavior, Compatibility, and TradeoffsPlanned lesson · reserved path Chapter18/Lesson3.html

Planned04

Apache Curator: Framework, Retry Policies, Connection State, Recipes, Caches, and Testing Utilities: Failure Modes, Diagnostics, Security, Reliability, and PerformancePlanned lesson · reserved path Chapter18/Lesson4.html

Planned05

Checkpoint Lab — Apache Curator: Framework, Retry Policies, Connection State, Recipes, Caches, and Testing Utilities: Build, Test, Measure, Troubleshoot, and Explain the ResultPlanned lesson · reserved path Chapter18/Lesson5.html

Planned

Chapter 19

Persistence Internals: Transaction Logs, Snapshots, Data Directory Layout, fsync, and Storage Requirements

5 lessons

Persistence Internals: Transaction Logs, Snapshots, Data Directory Layout, fsync, and Storage Requirements: Concepts, Terminology, Architecture, and Mental ModelPlanned lesson · reserved path Chapter19/Lesson1.html

Planned02

Persistence Internals: Transaction Logs, Snapshots, Data Directory Layout, fsync, and Storage Requirements: Guided Hands-On Workflow, Commands, APIs, and ConfigurationPlanned lesson · reserved path Chapter19/Lesson2.html

Planned03

Persistence Internals: Transaction Logs, Snapshots, Data Directory Layout, fsync, and Storage Requirements: Design Choices, Scaling Behavior, Compatibility, and TradeoffsPlanned lesson · reserved path Chapter19/Lesson3.html

Planned04

Persistence Internals: Transaction Logs, Snapshots, Data Directory Layout, fsync, and Storage Requirements: Failure Modes, Diagnostics, Security, Reliability, and PerformancePlanned lesson · reserved path Chapter19/Lesson4.html

Planned05

Checkpoint Lab — Persistence Internals: Transaction Logs, Snapshots, Data Directory Layout, fsync, and Storage Requirements: Build, Test, Measure, Troubleshoot, and Explain the ResultPlanned lesson · reserved path Chapter19/Lesson5.html

Planned

Chapter 20

Snapshots, Log Retention, autopurge, Disk-Full Failure Modes, Backup, Restore, and Data-Directory Recovery

5 lessons

Snapshots, Log Retention, autopurge, Disk-Full Failure Modes, Backup, Restore, and Data-Directory Recovery: Concepts, Terminology, Architecture, and Mental ModelPlanned lesson · reserved path Chapter20/Lesson1.html

Planned02

Snapshots, Log Retention, autopurge, Disk-Full Failure Modes, Backup, Restore, and Data-Directory Recovery: Guided Hands-On Workflow, Commands, APIs, and ConfigurationPlanned lesson · reserved path Chapter20/Lesson2.html

Planned03

Snapshots, Log Retention, autopurge, Disk-Full Failure Modes, Backup, Restore, and Data-Directory Recovery: Design Choices, Scaling Behavior, Compatibility, and TradeoffsPlanned lesson · reserved path Chapter20/Lesson3.html

Planned04

Snapshots, Log Retention, autopurge, Disk-Full Failure Modes, Backup, Restore, and Data-Directory Recovery: Failure Modes, Diagnostics, Security, Reliability, and PerformancePlanned lesson · reserved path Chapter20/Lesson4.html

Planned05

Checkpoint Lab — Snapshots, Log Retention, autopurge, Disk-Full Failure Modes, Backup, Restore, and Data-Directory Recovery: Build, Test, Measure, Troubleshoot, and Explain the ResultPlanned lesson · reserved path Chapter20/Lesson5.html

Planned

Chapter 21

AdminServer, Four-Letter Words, mntr/stat/ruok, Metrics, JMX, Prometheus, Logs, and Operational Dashboards

5 lessons

AdminServer, Four-Letter Words, mntr/stat/ruok, Metrics, JMX, Prometheus, Logs, and Operational Dashboards: Concepts, Terminology, Architecture, and Mental ModelPlanned lesson · reserved path Chapter21/Lesson1.html

Planned02

AdminServer, Four-Letter Words, mntr/stat/ruok, Metrics, JMX, Prometheus, Logs, and Operational Dashboards: Guided Hands-On Workflow, Commands, APIs, and ConfigurationPlanned lesson · reserved path Chapter21/Lesson2.html

Planned03

AdminServer, Four-Letter Words, mntr/stat/ruok, Metrics, JMX, Prometheus, Logs, and Operational Dashboards: Design Choices, Scaling Behavior, Compatibility, and TradeoffsPlanned lesson · reserved path Chapter21/Lesson3.html

Planned04

AdminServer, Four-Letter Words, mntr/stat/ruok, Metrics, JMX, Prometheus, Logs, and Operational Dashboards: Failure Modes, Diagnostics, Security, Reliability, and PerformancePlanned lesson · reserved path Chapter21/Lesson4.html

Planned05

Checkpoint Lab — AdminServer, Four-Letter Words, mntr/stat/ruok, Metrics, JMX, Prometheus, Logs, and Operational Dashboards: Build, Test, Measure, Troubleshoot, and Explain the ResultPlanned lesson · reserved path Chapter21/Lesson5.html

Planned

Chapter 22

Performance and Capacity: Request Mix, znode Size/Count, Watches, Session Churn, GC, Disk Latency, and Network RTT

5 lessons

Performance and Capacity: Request Mix, znode Size/Count, Watches, Session Churn, GC, Disk Latency, and Network RTT: Concepts, Terminology, Architecture, and Mental ModelPlanned lesson · reserved path Chapter22/Lesson1.html

Planned02

Performance and Capacity: Request Mix, znode Size/Count, Watches, Session Churn, GC, Disk Latency, and Network RTT: Guided Hands-On Workflow, Commands, APIs, and ConfigurationPlanned lesson · reserved path Chapter22/Lesson2.html

Planned03

Performance and Capacity: Request Mix, znode Size/Count, Watches, Session Churn, GC, Disk Latency, and Network RTT: Design Choices, Scaling Behavior, Compatibility, and TradeoffsPlanned lesson · reserved path Chapter22/Lesson3.html

Planned04

Performance and Capacity: Request Mix, znode Size/Count, Watches, Session Churn, GC, Disk Latency, and Network RTT: Failure Modes, Diagnostics, Security, Reliability, and PerformancePlanned lesson · reserved path Chapter22/Lesson4.html

Planned05

Checkpoint Lab — Performance and Capacity: Request Mix, znode Size/Count, Watches, Session Churn, GC, Disk Latency, and Network RTT: Build, Test, Measure, Troubleshoot, and Explain the ResultPlanned lesson · reserved path Chapter22/Lesson5.html

Planned

Chapter 23

Failure Injection: Leader Loss, Follower Loss, Network Partitions, Clock/GC Pauses, Disk Stalls, and Client Storms

5 lessons

Failure Injection: Leader Loss, Follower Loss, Network Partitions, Clock/GC Pauses, Disk Stalls, and Client Storms: Concepts, Terminology, Architecture, and Mental ModelPlanned lesson · reserved path Chapter23/Lesson1.html

Planned02

Failure Injection: Leader Loss, Follower Loss, Network Partitions, Clock/GC Pauses, Disk Stalls, and Client Storms: Guided Hands-On Workflow, Commands, APIs, and ConfigurationPlanned lesson · reserved path Chapter23/Lesson2.html

Planned03

Failure Injection: Leader Loss, Follower Loss, Network Partitions, Clock/GC Pauses, Disk Stalls, and Client Storms: Design Choices, Scaling Behavior, Compatibility, and TradeoffsPlanned lesson · reserved path Chapter23/Lesson3.html

Planned04

Failure Injection: Leader Loss, Follower Loss, Network Partitions, Clock/GC Pauses, Disk Stalls, and Client Storms: Failure Modes, Diagnostics, Security, Reliability, and PerformancePlanned lesson · reserved path Chapter23/Lesson4.html

Planned05

Checkpoint Lab — Failure Injection: Leader Loss, Follower Loss, Network Partitions, Clock/GC Pauses, Disk Stalls, and Client Storms: Build, Test, Measure, Troubleshoot, and Explain the ResultPlanned lesson · reserved path Chapter23/Lesson5.html

Planned

Chapter 24

Configuration Management: zoo.cfg, JVM Settings, Limits, Throttling, Quotas, and Safe Production Defaults

5 lessons

Configuration Management: zoo.cfg, JVM Settings, Limits, Throttling, Quotas, and Safe Production Defaults: Concepts, Terminology, Architecture, and Mental ModelPlanned lesson · reserved path Chapter24/Lesson1.html

Planned02

Configuration Management: zoo.cfg, JVM Settings, Limits, Throttling, Quotas, and Safe Production Defaults: Guided Hands-On Workflow, Commands, APIs, and ConfigurationPlanned lesson · reserved path Chapter24/Lesson2.html

Planned03

Configuration Management: zoo.cfg, JVM Settings, Limits, Throttling, Quotas, and Safe Production Defaults: Design Choices, Scaling Behavior, Compatibility, and TradeoffsPlanned lesson · reserved path Chapter24/Lesson3.html

Planned04

Configuration Management: zoo.cfg, JVM Settings, Limits, Throttling, Quotas, and Safe Production Defaults: Failure Modes, Diagnostics, Security, Reliability, and PerformancePlanned lesson · reserved path Chapter24/Lesson4.html

Planned05

Checkpoint Lab — Configuration Management: zoo.cfg, JVM Settings, Limits, Throttling, Quotas, and Safe Production Defaults: Build, Test, Measure, Troubleshoot, and Explain the ResultPlanned lesson · reserved path Chapter24/Lesson5.html

Planned

Chapter 25

Deployment on VMs and Kubernetes: Stable Identity, Persistent Volumes, Pod Disruption, Anti-Affinity, and DNS

5 lessons

Deployment on VMs and Kubernetes: Stable Identity, Persistent Volumes, Pod Disruption, Anti-Affinity, and DNS: Concepts, Terminology, Architecture, and Mental ModelPlanned lesson · reserved path Chapter25/Lesson1.html

Planned02

Deployment on VMs and Kubernetes: Stable Identity, Persistent Volumes, Pod Disruption, Anti-Affinity, and DNS: Guided Hands-On Workflow, Commands, APIs, and ConfigurationPlanned lesson · reserved path Chapter25/Lesson2.html

Planned03

Deployment on VMs and Kubernetes: Stable Identity, Persistent Volumes, Pod Disruption, Anti-Affinity, and DNS: Design Choices, Scaling Behavior, Compatibility, and TradeoffsPlanned lesson · reserved path Chapter25/Lesson3.html

Planned04

Deployment on VMs and Kubernetes: Stable Identity, Persistent Volumes, Pod Disruption, Anti-Affinity, and DNS: Failure Modes, Diagnostics, Security, Reliability, and PerformancePlanned lesson · reserved path Chapter25/Lesson4.html

Planned05

Checkpoint Lab — Deployment on VMs and Kubernetes: Stable Identity, Persistent Volumes, Pod Disruption, Anti-Affinity, and DNS: Build, Test, Measure, Troubleshoot, and Explain the ResultPlanned lesson · reserved path Chapter25/Lesson5.html

Planned

Chapter 26

Compatibility, Rolling Upgrades, 3.8→3.9 Planning, Feature Gates, Rollback, and Client-Version Strategy

5 lessons

Compatibility, Rolling Upgrades, 3.8→3.9 Planning, Feature Gates, Rollback, and Client-Version Strategy: Concepts, Terminology, Architecture, and Mental ModelPlanned lesson · reserved path Chapter26/Lesson1.html

Planned02

Compatibility, Rolling Upgrades, 3.8→3.9 Planning, Feature Gates, Rollback, and Client-Version Strategy: Guided Hands-On Workflow, Commands, APIs, and ConfigurationPlanned lesson · reserved path Chapter26/Lesson2.html

Planned03

Compatibility, Rolling Upgrades, 3.8→3.9 Planning, Feature Gates, Rollback, and Client-Version Strategy: Design Choices, Scaling Behavior, Compatibility, and TradeoffsPlanned lesson · reserved path Chapter26/Lesson3.html

Planned04

Compatibility, Rolling Upgrades, 3.8→3.9 Planning, Feature Gates, Rollback, and Client-Version Strategy: Failure Modes, Diagnostics, Security, Reliability, and PerformancePlanned lesson · reserved path Chapter26/Lesson4.html

Planned05

Checkpoint Lab — Compatibility, Rolling Upgrades, 3.8→3.9 Planning, Feature Gates, Rollback, and Client-Version Strategy: Build, Test, Measure, Troubleshoot, and Explain the ResultPlanned lesson · reserved path Chapter26/Lesson5.html

Planned

Chapter 27

Production Capstone: Design, Secure, Benchmark, Fail, Recover, Upgrade, and Document a ZooKeeper Ensemble

5 lessons

Production Capstone: Design, Secure, Benchmark, Fail, Recover, Upgrade, and Document a ZooKeeper Ensemble: Concepts, Terminology, Architecture, and Mental ModelPlanned lesson · reserved path Chapter27/Lesson1.html

Planned02

Production Capstone: Design, Secure, Benchmark, Fail, Recover, Upgrade, and Document a ZooKeeper Ensemble: Guided Hands-On Workflow, Commands, APIs, and ConfigurationPlanned lesson · reserved path Chapter27/Lesson2.html

Planned03

Production Capstone: Design, Secure, Benchmark, Fail, Recover, Upgrade, and Document a ZooKeeper Ensemble: Design Choices, Scaling Behavior, Compatibility, and TradeoffsPlanned lesson · reserved path Chapter27/Lesson3.html

Planned04

Production Capstone: Design, Secure, Benchmark, Fail, Recover, Upgrade, and Document a ZooKeeper Ensemble: Failure Modes, Diagnostics, Security, Reliability, and PerformancePlanned lesson · reserved path Chapter27/Lesson4.html

Planned05

Checkpoint Lab — Production Capstone: Design, Secure, Benchmark, Fail, Recover, Upgrade, and Document a ZooKeeper Ensemble: Build, Test, Measure, Troubleshoot, and Explain the ResultPlanned lesson · reserved path Chapter27/Lesson5.html

Planned