NetBackup™ for Hadoop Administrator's Guide
- Introduction
- Verifying the pre-requisites and best practices for the Hadoop plug-in for NetBackup
- Configuring NetBackup for Hadoop
- About configuring NetBackup for Hadoop
- Managing backup hosts
- Adding Hadoop credentials in NetBackup
- Configuring the Hadoop plug-in using the Hadoop configuration file
- Configuration for a Hadoop cluster that uses Kerberos
- Configuring NetBackup policies for Hadoop plug-in
- Disaster recovery of a Hadoop cluster
- Performing backups and restores of Hadoop
- Troubleshooting
- About troubleshooting NetBackup for Hadoop issues
- About NetBackup for Hadoop debug logging
- Troubleshooting backup issues for Hadoop data
- Backup operation fails with error 6609
- Backup operation failed with error 6618
- Backup operation fails with error 6647
- Extended attributes (xattrs) and Access Control Lists (ACLs) are not backed up or restored for Hadoop
- Backup operation fails with error 6654
- Backup operation fails with bpbrm error 8857
- Backup operation fails with error 6617
- Backup operation fails with error 6616
- Backup operation fails with error 84
- NetBackup configuration and certificate files do not persist after the container-based NetBackup appliance restarts
- Unable to see incremental backup images during restore even though the images are seen in the backup image selection
- One of the child backup jobs goes in a queued state
- Troubleshooting restore issues for Hadoop data
- Restore fails with error code 2850
- NetBackup restore job for Hadoop completes partially
- Extended attributes (xattrs) and Access Control Lists (ACLs) are not backed up or restored for Hadoop
- Restore operation fails when Hadoop plug-in files are missing on the backup host
- Restore fails with bpbrm error 54932
- Restore operation fails with bpbrm error 21296
- Configuration file is not recovered after a disaster recovery
- Index
Extended attributes (xattrs) and Access Control Lists (ACLs) are not backed up or restored for Hadoop
Extended attributes allow user applications to associate additional metadata with a file or directory in Hadoop. By default, this is enabled on Hadoop Distributed File System (HDFS).
Access Control Lists provide a way to set different permissions for specific named users or named groups, in addition to the standard permissions. By default, this is disabled on HDFS.
Hadoop plug-ins do not capture extended attributes or Access Control Lists (ACLs) of an object during backup and hence these are not set on the restored files or folders.
Workaround:
If the extended attributes are set on any of the files or directories that is backed up using the BigData policy with Application_Type = hadoop, then, you have to explicitly set the extended attributes on the restored data.
Extended attributes can be set using the Hadoop shell commands such as fs -getfattr and hadoop fs -setfattr.
If the Access Control Lists (ACLs) are enabled and set on any of the files or directories that is backed up using the BigData policy with Application_Type = hadoop, then, you have to explicitly set the ACLs on the restored data.
ACLs can be set using the Hadoop shell commands such as hadoop fs -getfacl and hadoop fs -setfacl.