HDFS Overview
Introduction
Overview of HDFS
NameNodes
Moving NameNode roles
Moving highly available NameNode, failover controller, and JournalNode roles using the Migrate Roles wizard
Moving a NameNode to a different host using Cloudera Manager
Sizing NameNode heap memory
Environment variables for sizing NameNode heap memory
Monitoring heap memory usage
Files and directories
Disk space versus namespace
Replication
Examples of estimating NameNode heap memory
Remove or add storage directories for NameNode data directories
DataNodes
How NameNode manages blocks on a failed DataNode
Replace a disk on a DataNode host
Remove a DataNode
Fixing block inconsistencies
Add storage directories using Cloudera Manager
Remove storage directories using Cloudera Manager
Configuring storage balancing for DataNodes
Configure storage balancing for DataNodes using Cloudera Manager
Perform a disk hot swap for DataNodes using Cloudera Manager
JournalNodes
Moving the JournalNode edits directory for a role group using Cloudera Manager
Moving the JournalNode edits directory for a role instance using Cloudera Manager
Synchronizing the contents of JournalNodes
Multiple NameNodes overview
Multiple Namenodes configurations
Known issue and its workaround
Adding multiple namenodes using the HDFS service