Hadoop Operations

A Guide for Developers and Administrators

By: Eric Sammer

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Paperback | 12 October 2012

At a Glance

Paperback
350 Pages

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23.2 x 17.9 x 1.6

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If you've been asked to maintain large and complex Hadoop clusters, this book is a must. Demand for operations-specific material has skyrocketed now that Hadoop is becoming the de facto standard for truly large-scale data processing in the data center. Eric Sammer, Principal Solution Architect at Cloudera, shows you the particulars of running Hadoop in production, from planning, installing, and configuring the system to providing ongoing maintenance.

Rather than run through all possible scenarios, this pragmatic operations guide calls out what works, as demonstrated in critical deployments.

Get a high-level overview of HDFS and MapReduce: why they exist and how they work
Plan a Hadoop deployment, from hardware and OS selection to network requirements
Learn setup and configuration details with a list of critical properties
Manage resources by sharing a cluster across multiple groups
Get a runbook of the most common cluster maintenance tasks
Monitor Hadoop clusters-and learn troubleshooting with the help of real-world war stories
Use basic tools and techniques to handle backup and catastrophic failure

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Non-Fiction Computing & I.T.Databases Data Mining Data Capture & Analysis Computer Programming & Software Development Web Programming Computer Networking & Communications Database Software Booktopia Publisher Services John Wiley & Sons Publishers UK

Preface	p. ix
Introduction	p. 1
HDFS	p. 7
Goals and Motivation	p. 7
Design	p. 8
Daemons	p. 9
Reading and Writing Data	p. 11
The Read Path	p. 12
The Write Path	p. 13
Managing Filesystem Metadata	p. 14
Namenode High Availability	p. 16
Namenode Federation	p. 18
Access and Integration	p. 20
Command-Line Tools	p. 20
FUSE	p. 23
REST Support	p. 23
MapReduce	p. 25
The Stages of MapReduce	p. 26
Introducing Hadoop MapReduce	p. 33
Daemons	p. 34
When It All Goes Wrong	p. 36
YARN	p. 37
Planning a Hadoop Cluster	p. 41
Picking a Distribution and Version of Hadoop	p. 41
Apache Hadoop	p. 41
Cloudera's Distribution Including Apache Hadoop	p. 42
Versions and Features	p. 42
What Should I Use?	p. 44
Hardware Selection	p. 45
Master Hardware Selection	p. 46
Worker Hardware Selection	p. 48
Cluster Sizing	p. 50
Blades, SANs, and Virtualization	p. 52
Operating System Selection and Preparation	p. 54
Deployment Layout	p. 54
Software	p. 56
Hostnames, DNS, and Identification	p. 57
Users, Groups, and Privileges	p. 60
Kernel Tuning	p. 62
vm.swappiness	p. 62
vm.overcommit_memory	p. 62
Disk Configuration	p. 63
Choosing a Filesystem	p. 64
Mount Options	p. 66
Network Design	p. 66
Network Usage in Hadoop: A Review	p. 67
1 Gb versus 10 Gb Networks	p. 69
Typical Network Topologies	p. 69
Installation and Configuration	p. 75
Installing Hadoop	p. 75
Apache Hadoop	p. 76
CDH	p. 80
Configuration: An Overview	p. 84
The Hadoop XML Configuration Files	p. 87
Environment Variables and Shell Scripts	p. 88
Logging Configuration	p. 90
HDFS	p. 93
Identification and Location	p. 93
Optimization and Tuning	p. 95
Formatting the Namenode	p. 99
Creating a /tmp Directory	p. 100
Namenode High Availability	p. 100
Fencing Options	p. 102
Basic Configuration	p. 104
Automatic Failover Configuration	p. 105
Format and Bootstrap the Namenodes	p. 108
Namenode Federation	p. 113
MapReduce	p. 120
Identification and Location	p. 120
Optimization and Tuning	p. 122
Rack Topology	p. 130
Security	p. 133
Identity, Authentication, and Authorization	p. 135
Identity	p. 137
Kerberos and Hadoop	p. 137
Kerberos: A Refresher	p. 138
Kerberos Support in Hadoop	p. 140
Authorization	p. 153
HDFS	p. 153
MapReduce	p. 155
Other Tools and Systems	p. 159
Tying It Together	p. 164
Resource Management	p. 167
What Is Resource Management?	p. 167
HDFS Quotas	p. 168
MapReduce Schedulers	p. 170
The FIFO Scheduler	p. 171
The Fair Scheduler	p. 173
The Capacity Scheduler	p. 185
The Future	p. 193
Cluster Maintenance	p. 195
Managing Hadoop Processes	p. 195
Starting and Stopping Processes with Init Scripts	p. 195
Starting and Stopping Processes Manually	p. 196
HDFS Maintenance Tasks	p. 196
Adding a Datanode	p. 196
Decommissioning a Datanode	p. 197
Checking Filesystem Integrity with fsck	p. 198
Balancing HDFS Block Data	p. 202
Dealing with a Failed Disk	p. 204
MapReduce Maintenance Tasks	p. 205
Adding a Tasktracker	p. 205
Decommissioning a Tasktracker	p. 206
Killing a MapReduce Job	p. 206
Killing a MapReduce Task	p. 207
Dealing with a Blacklisted Tasktracker	p. 207
Troubleshooting	p. 209
Differential Diagnosis Applied to Systems	p. 209
Common Failures and Problems	p. 211
Humans (You)	p. 211
Misconfiguration	p. 212
Hardware Failure	p. 213
Resource Exhaustion	p. 213
Host Identification and Naming	p. 214
Network Partitions	p. 214
"Is the Computer Plugged In?"	p. 215
E-SPORE	p. 215
Treatment and Care	p. 217
War Stories	p. 220
A Mystery Bottleneck	p. 221
There's No Place Like 127.0.0.1	p. 224
Monitoring	p. 229
An Overview	p. 229
Hadoop Metrics	p. 230
Apache Hadoop 0.20.0 and CDH3 (metrics1)	p. 231
Apache Hadoop 0.20.203 and Later, and CDH4 (metrics 2)	p. 237
What about SNMP?	p. 239
Health Monitoring	p. 239
Host-Level Checks	p. 240
All Hadoop Processes	p. 242
HDFS Checks	p. 244
MapReduce Checks	p. 246
Backup and Recovery	p. 249
Data Backup	p. 249
Distributed Copy (distcp)	p. 250
Parallel Data Ingestion	p. 252
Namenode Metadata	p. 254
Appendix: Deprecated Configuration Properties	p. 257
Index	p. 267
Table of Contents provided by Ingram. All Rights Reserved.

Hadoop Operations

A Guide for Developers and Administrators

At a Glance

Paperback

Shipping

How to return your order

Defective items

You Can Find This Book In

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