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Backup and Disaster Recovery (BDR) on Oracle Big Data Appliance FAQ (Doc ID 1615622.1)

Last updated on APRIL 14, 2022

Applies to:

Big Data Appliance Integrated Software - Version 2.1.2 and later
Linux x86-64


Frequently Asked Questions for BDR on the Oracle Big Data Appliance (BDA).

Questions and Answers

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In this Document
Questions and Answers
 What is BDR?
 When performing BDR is it necessary that the source and target BDA cluster be running the same version of Mammoth?
 When performing BDR is it necessary that both cluster be either secure or non-secure?
 Is it possible to backup Hive databases from a Kerberized cluster to a Non-Kerberized Cluster?
 What other options are there then for backing up Hive databases from a Kerberized cluster to a Non-Kerberized Cluster?
 What is a replication Peer?
 What is a replication job?
 What is a local Cloudera Manger server?
 When using BDR to replicate HDFS sources is there a way to use regular expressions to exclude files, etc. like there is for Hive?
 Can BDA jobs be configured to replication from and to the same cluster?
 What is the default path that Hive non-external tables replicate to? Is it /user/hive/warehouse/*?
 BDA Hive Metadata is stored in MySQL. Does this mean the metadata for the replicated tables is in one of the hive MySQL tables?
 If using a Hive external table is Hive BDR replication required? Or in the case of Hive external tables is using BDR to replicate the HDFS sources what should be used?
 What happens if replicating a Hive table where a version of that table already exists on the target?
 Is there a way for BDR to notify of an existing target-side table of the same name?
 Is  BDR supported on BDA V3.0.*/CDH5.0.* ?
 Can BDR on the BDA be used to replicate data between BDA and a non-BDA CDH comparable cluster. Is that supported?
 Can Hive BDR replication be done with Sentry in place?
 If we use the recommended approach by Cloudera (use policy files & manually copy them) are we losing the possibility of using HDFS Sentry Plugin?
 We are able to replicate data and metadata not sentry permissions, is it correct that we cannot automate this now and will have to replicate Sentry permissions manually within datacenters for now?
 Does BDA V4.5 support BDR between clusters where the Cloudera Manager on one peer is TLS-enabled and the Cloudera Manager for the other peer is not TLS-enabled.
 Is it possible to implement BDR between two different BDA clusters where hdfs transparent encryption is enabled?
 What does the "data+metadata" option do in the Hive replication job?
 What from the "data+metadata" gets copied over during the HDFS replication job?
 Is there a way to manually create or locate the export.json file (Hive metadata), and manually upload it?
 Is it possible to disable ubertasks just for the BDR jobs?

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