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Merge pull request #76672 from msft-tacox/patch-2
Update apache-hive-migrate-workloads.md
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articles/hdinsight/interactive-query/apache-hive-migrate-workloads.md

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One advantage of Hive is the ability to export metadata to an external database (referred to as the Hive Metastore). The **Hive Metastore** is responsible for storing table statistics, including the table storage location, column names, and table index information. The metastore database schema differs between Hive versions. Do the following to upgrade a HDInsight 3.6 Hive Metastore so that it's compatible with HDInsight 4.0.
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1. Create a new copy of your external metastore. HDInsight 3.6 and HDInsight 4.0 require different metastore schemas and can't share a single metastore. See [Use external metadata stores in Azure HDInsight](../hdinsight-use-external-metadata-stores.md) to learn more about attaching an external metastore to an HDInsight cluster.
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2. Launch a script action against your HDInsight 3.6 cluster, with "Head nodes" as the node type for execution. Paste the following URI into the textbox marked "Bash Script URI": https://hdiconfigactions.blob.core.windows.net/hivemetastoreschemaupgrade/launch-schema-upgrade.sh. In the textbox marked "Arguments", enter the servername, database, username and password for the **copied** Hive metastore, separated by spaces. Do not include ".database.windows.net" when specifying the servername.
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2. Launch a script action against your HDI 3.6 cluster, with "Head nodes" as the node type for execution. Paste the following URI into the textbox marked "Bash Script URI": https://hdiconfigactions.blob.core.windows.net/hivemetastoreschemaupgrade/launch-schema-upgrade.sh.
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In the textbox marked "Arguments", enter the servername, database, username and password for the **copied** Hive metastore, separated by spaces. Do not include ".database.windows.net" when specifying the servername.
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> [!Warning]
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> The upgrade which converts the HDInsight 3.6 metadata schema to the HDInsight 4.0 schema, cannot be reversed.

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