Preparing for data migration
Before you start the data migration from CDH 5.x or HDP 2.x to Cloudera, you must understand the requirements and complete certain tasks on CDH/HDP and Cloudera to ensure a successful migration.
- If you are migrating from CDH, configure Ranger ACLs in Cloudera corresponding to the HBase ACLs in your existing CDH cluster.
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If you are migrating from HDP perform the following steps:
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Configure Ranger ACLs in Cloudera
corresponding to the HBase or Ranger ACLs in your existing HDP cluster.
For more information, see Configure a resource-based service: HBase.
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Migrate your applications to use the new HBase-Spark connector because
the Spark-HBase connector that you were using in CDH or HDP is no longer
supported in Cloudera.
For more information, see Using the HBase-Spark connector.
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Configure Ranger ACLs in Cloudera
corresponding to the HBase or Ranger ACLs in your existing HDP cluster.
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Review the deprecated APIs and incompatibilities for HBase, if any, when
migrating from HDP 2.x or CDH 5.x to Cloudera.
For more information, see Deprecation Notices for Apache HBase.
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Ensure that all data has been migrated to a supported encoding type before the
migration.
For more information, see Remove PREFIX_TREE Data Block Encoding.
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Ensure that you upgrade any external co-processors manually because they are
not automatically upgraded during migration. You need to ensure that your
co-processors classes are compatible with Cloudera.
For more information, see Check co-processor classes.