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Lecture-Feed of Series: Dependable Systems (ST 2012) Feed of Series: Dependable Systems (ST 2012)

Dependable Systems (ST 2012)

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Dr. Peter Tröger

Continous service provisioning is a key feature of modern hardware und software server systems. These systems achieve their level of user-perceived availability through a set of formal and technical approaches, commonly summarized under the term dependability.

Dependability is defined as the trustworthiness of hardware and software systems, so that reliance can be placed on the service they provide. The main dependability attributes commonly known and accepted are availability, reliability, safety, and security.

The Dependable Systems course gives an introduction into theoretical foundations, common building blocks and example implementations for dependable IT components and systems. The focus is on reliability and availability aspects of dependable systems, such as reliability analysis, fault tolerance, fault models or failure prediction.

Introduction

Introduction
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Datum: 10.04.2012
Sprache: en
Dauer: 01:07:47
Vorlesung abspielen
• What is Dependability? 00:17:28
• Dependability Examples 00:09:17
• Dependable Systems Motivation 00:23:17
• Dark Clouds 00:12:38
• Course Topics 00:05:07

Definitions and Metrics

Definitions and Metrics - Faults
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Datum: 11.04.2012
Sprache: en
Dauer: 01:13:02
Vorlesung abspielen
• Dependability 00:13:56
• System Integration Levels 00:15:12
• Dependability Threats 00:14:03
• Faults 00:07:21
• Observations on Faults 00:17:45
• Fault Model 00:04:45
Dependability Threats
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Datum: 17.04.2012
Sprache: en
Dauer: 01:28:39
Vorlesung abspielen
• Chain of Dependability Threats 00:11:26
• Fault Model for Semiconductor Memories 00:15:34
• Errors 00:14:28
• Software Error Models 00:14:13
• Failures 00:13:24
• Swiss Cheese Model 00:07:49
Means of Dependability
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Datum: 24.04.2012
Sprache: en
Dauer: 01:19:40
Vorlesung abspielen
• Fault Prevention 00:08:10
• Testing 00:12:47
• Phases of Fault Tolerance 00:17:23
• Fault Tolerance - Damage Confinement 00:16:53
• Fault Tolerance - Fault Treatment 00:06:20
• Attributes of Dependability 00:06:01
Attributes of Dependability
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Datum: 25.04.2012
Sprache: en
Dauer: 01:14:11
Vorlesung abspielen
• Attributes of Dependability 00:15:21
• PDF & CDF 00:17:46
• Why Exponential? 00:11:13
• Variable Failure Rate in Real World 00:13:43
• Steady-State Availability and MTBF 00:16:08

Dependability Modeling

Dependability Modeling 1/2
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Datum: 02.05.2012
Sprache: en
Dauer: 01:13:04
Vorlesung abspielen
• Amazon EC2 SLA 00:08:27
• Dependability Modeling 00:20:30
• General Rules 00:10:34
• Serial Case 00:15:04
• K-of-N Systems 00:12:27
• Reliability Block Diagrams 00:06:02
Dependability Modeling 2/2
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Datum: 08.05.2012
Sprache: en
Dauer: 01:26:08
Vorlesung abspielen
• Complex RBDs 00:10:59
• Coherent Structures 00:10:43
• Deductive Analysis 00:12:06
• Cut Sets 00:13:52
• Quantitative Analysis of Fault Trees 00:18:42
• HECS Example 00:05:13

State-Based Dependability Modeling

Dependability Modeling & State-Based Dependability Modeling
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Datum: 09.05.2012
Sprache: en
Dauer: 01:23:03
Vorlesung abspielen
• Cut Sets 00:11:10
• RBD vs. FTA 00:15:05
• Event Tree Analysis 00:10:20
• State-Based Dependability Modeling 00:10:52
• Markov Chains 00:16:25
• Stochatic Petri Nets 00:13:44
• Petri Net Simulation 00:05:27

Reliability Prediction

Reliability Prediction
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Datum: 15.05.2012
Sprache: en
Dauer: 01:18:41
Vorlesung abspielen
• Introduction 00:10:53
• MIL-HDBK 217 00:18:29
• Telcordia (Bellcore) SR-332/TR-332 00:10:59
• Software - A Different Story 00:11:41
• Software Reliability Growth Models 00:15:32
• Basic Execution Time Model (Musa) 00:11:07

System Dependability Evaluation

System Dependability Evaluation(1)
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Datum: 16.05.2012
Sprache: en
Dauer: 01:20:58
Vorlesung abspielen
• Software - A Different Story 00:17:59
• Halstead Metric 00:17:32
• System Dependability Evaluation 00:17:25
• FMEA 00:14:49
• HAZOPS 00:13:13
System Dependability Evaluation(2)
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Datum: 22.05.2012
Sprache: en
Dauer: 01:18:42
Vorlesung abspielen
• Introduction 00:09:31
• Software Process Evaluation and Improvement 00:19:40
• Six Sigma 00:14:55
• ITIL 00:27:06
• CoCiT 00:07:40

Fault Tolerance Patterns

Architectural Patterns
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Datum: 23.05.2012
Sprache: en
Dauer: 01:18:30
Vorlesung abspielen
• Phases of Fault Tolerance 00:17:02
• Error Containment Barrier 00:11:12
• Correcting Audits 00:14:46
• Spatial Redundancy though Replication 00:21:00
• Humans 00:11:27
• Fault Observer 00:03:03
Detection Patterns
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Datum: 29.05.2012
Sprache: en
Dauer: 01:27:23
Vorlesung abspielen
• Detection Patterns 00:19:58
• Realistic Threshold Examples 00:21:28
• Error Recovery Patterns 00:12:16
• Redundancy Configuration for Failover 00:23:39
• SCSI Quorum Device 00:10:02
Fault Tolerance Patterns & Hardware Dependability - Diagnosis
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Datum: 30.05.2012
Sprache: en
Dauer: 01:23:14
Vorlesung abspielen
• Failover 00:12:52
• Checkpoint 00:10:23
• Error Mitigation 00:19:23
• Hardware Dependability - Diagnosis 00:16:48
• Coding Checks in Memory Hardware 00:16:35
• Checksumming 00:07:13

Hardware Dependability

Hardware Dependability - Testing
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Datum: 05.06.2012
Sprache: en
Dauer: 01:22:35
Vorlesung abspielen
• Assignment 00:13:56
• Dependable Systems Design(Echtle) 00:12:52
• Hardware Testing 00:11:40
• Memory Testing 00:12:19
• Fault Injection 00:17:13
• Fault List Reduction 00:14:35
Hardware Dependability - Redundancy
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Datum: 06.06.2012
Sprache: en
Dauer: 01:18:21
Vorlesung abspielen
• Redundancy 00:15:02
• System Failure Response Strategies 00:16:12
• N-Modular Redundancy 00:13:54
• Hardware Voting 00:15:52
• Hybrid Approaches 00:17:21
Memory- and Disk Redundancy
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Datum: 20.06.2012
Sprache: en
Dauer: 01:25:50
Vorlesung abspielen
• Assignment 3 00:06:20
• Redundancy 00:16:07
• The Real World of Hardware Redundancy 00:21:06
• Disk Redundancy 00:15:17
• RAID MTTF Calculation 00:18:59
• Software RAID 00:08:01

Proactive Fault Management

Proactive Fault Management
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Datum: 19.06.2012
Sprache: de
Dauer: 01:27:48
Vorlesung abspielen
• Introduction 00:10:22
• Variable Selection 00:09:11
• Online Failure Prediction Taxonomy 00:17:20
• Prediction Techniques Examples 00:09:51
• Dispersion Frame Technique 00:16:14
• Assessing Failure Prediction 00:13:16
• Taking Action 00:11:34

Software Dependability

Software Dependability 1/3
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Datum: 03.07.2012
Sprache: en
Dauer: 01:11:50
Vorlesung abspielen
• Introduction 00:08:32
• Software Dependability 00:11:29
• Test Case Design 00:13:13
• Fault-Tolerance Software 00:21:05
• Another Categorization 00:09:38
• Checkpointing 00:07:53
Software Dependability 2/3
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Datum: 04.07.2012
Sprache: en
Dauer: 01:20:43
Vorlesung abspielen
• Single Version Approaches 00:21:15
• High-Level Instruction Duplication 00:18:06
• Control Flow error 00:14:14
• CFE - Approaches 00:08:16
• Multi-Version Approaches 00:12:09
• Example 00:06:43
Software Dependability 3/3
Nicht genügend Bewertungen
Datum: 10.07.2012
Sprache: en
Dauer: 01:26:20
Vorlesung abspielen
• Introduction 00:19:29
• N-Version Programming 00:10:24
• NVP- Programming Process 00:18:06
• NVP Independance Evaluation 00:11:57
• Simplex Approach 00:11:10
• Failover Cluster 00:07:30
• VMWare HA 00:07:44
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