Configure and Start Apache Tez

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	Note
	The `su` commands in this section use keywords to represent the Service user. For example, "hdfs" is used to represent the HDFS Service user. If you are using another name for your Service users, you will need to substitute your Service user name in each of the `su` commands.

	Important
	If you have a secure server, you will need Kerberos credentials for hdfs user access.

To upgrade Apache Tez:

Copy your previously backed-up copy of tez-site.xml into the /etc/tez/conf directory.
Check to see if the HDP-2.3.4 Tez tarball libraries are already in the /hdp/apps/<hdp 2.3>/tez/ version> directory - if so, then skip this step. If not, put the HDP-2.3.4 Tez tarball libraries in the /hdp/apps directory in HDFS, so that submitted Tez applications to this cluster will have access to these shared Tez tarball libraries. Execute this step on any host that has the Tez client installed.
```
su - hdfs
hdfs dfs -mkdir -p /hdp/apps/<hdp_version>/tez/
hdfs dfs -put /usr/hdp/<hdp_version>/tez/lib/tez.tar.gz /hdp/apps/<hdp_version>/tez/
hdfs dfs -chown -R hdfs:hadoop /hdp
hdfs dfs -chmod -R 555 /hdp/apps/<hdp_version>/tez
hdfs dfs -chmod -R 444 /hdp/apps/<hdp_version>/tez/tez.tar.gz
```
Where <hdp_version> is the current HDP version, for example 2.3.4-$BUILD.
Edit the tez.lib.uris property in the tez-site.xml file to point to /hdp/apps/<hdp_version>/tez/tez.tar.gz
```
...
<property>
 <name>tez.lib.uris</name>
 <value>/hdp/apps/<hdp_version>/tez/tez.tar.gz</value>
</property>
...
```
Where <hdp_version> is the current HDP version, for example 2.3.4-$BUILD.
Optional Earlier releases of Tez did not have access control. In the current version of Tez, the default behavior restricts the ability to view the Tez history to only the owner of the job. To retain unrestricted access for non-secure clusters, set tez.am.view-acls set to "*".

Update the following tez-site.xml properties to their new names.

Old Property Name	New Property Name
tez.am.java.opts	tez.am.launch.cmd-opts
tez.am.env	tez.am.launch.env
tez.am.shuffle-vertex-manager.min-src-fraction	tez.shuffle-vertex-manager.min-src-fraction
tez.am.shuffle-vertex-manager.max-src-fraction	tez.shuffle-vertex-manager.max-src-fraction
tez.am.shuffle-vertex-manager.enable.auto-parallel	tez.shuffle-vertex-manager.enable.auto-parallel
tez.am.shuffle-vertex-manager.desired-task-input-size	tez.shuffle-vertex-manager.desired-task-input-size
tez.am.shuffle-vertex-manager.min-task-parallelism	tez.shuffle-vertex-manager.min-task-parallelism
tez.am.grouping.split-count	tez.grouping.split-count
tez.am.grouping.by-length	tez.grouping.by-length
tez.am.grouping.by-count	tez.grouping.by-count
tez.am.grouping.max-size	tez.grouping.max-size
tez.am.grouping.min-size	tez.grouping.min-size
tez.am.grouping.rack-split-reduction	tez.grouping.rack-split-reduction
tez.am.am.complete.cancel.delegation.tokens	tez.cancel.delegation.tokens.on.completion
tez.am.max.task.attempts	tez.am.task.max.failed.attempts
tez.generate.dag.viz	tez.generate.debug.artifacts
tez.runtime.intermediate-output.key.comparator.class	tez.runtime.key.comparator.class
tez.runtime.intermediate-output.key.class	tez.runtime.key.class
tez.runtime.intermediate-output.value.class	tez.runtime.value.class
tez.runtime.intermediate-output.should-compress	tez.runtime.compress
tez.runtime.intermediate-output.compress.codec	tez.runtime.compress.codec
tez.runtime.intermediate-input.key.secondary.comparator.class	tez.runtime.key.secondary.comparator.class
tez.runtime.broadcast.data-via-events.enabled	tez.runtime.transfer.data-via-events.enabled
tez.runtime.broadcast.data-via-events.max-size	tez.runtime.transfer.data-via-events.max-size
tez.runtime.shuffle.input.buffer.percent	tez.runtime.shuffle.fetch.buffer.percent
tez.runtime.task.input.buffer.percent	tez.runtime.task.input.post-merge.buffer.percent
tez.runtime.job.counters.max	tez.am.counters.max.keys
tez.runtime.job.counters.group.name.max	tez.am.counters.group-name.max.keys
tez.runtime.job.counters.counter.name.max	tez.am.counters.name.max.keys
tez.runtime.job.counters.groups.max	tez.am.counters.groups.max.keys
tez.task.merge.progress.records	tez.runtime.merge.progress.records
tez.runtime.metrics.session.id	tez.runtime.framework.metrics.session.id
tez.task.scale.memory.additional.reservation. fraction.per-io	tez.task.scale.memory.additional-reservation.fraction.per-io
tez.task.scale.memory.additional.reservation. fraction.max	tez.task.scale.memory.additional-reservation.fraction.max
tez.task.initial.memory.scale.ratios	tez.task.scale.memory.ratios
tez.resource.calculator.process-tree.class	tez.task.resource.calculator.process-tree.class

For more information on setting Tez configuration parameters in HDP-2.3.4, see Installing and Configuring Apache Tez in the Non-Ambari Cluster Installation Guide.

Change the value of the tez.tez-ui.history-url.base property to the url for the upgraded Tez View. For more details, see Using the Tez View in the HDP Ambari Views Guide.

​Configure and Start Apache Tez