Impala Administration
As an administrator, you monitor Impala's use of resources and take action when necessary to keep Impala running smoothly and avoid conflicts with other Hadoop components running on the same cluster. When you detect that an issue has happened or could happen in the future, you reconfigure Impala or other components such as HDFS or even the hardware of the cluster itself to resolve or avoid problems.
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As an administrator, you can expect to perform installation, upgrade, and configuration tasks for Impala on all machines in a cluster. See Impala Upgrade Considerations, and Managing Impala for details.
For security tasks typically performed by administrators, see Impala Security Overview.
Administrators also decide how to allocate cluster resources so that all Hadoop components can run smoothly together. For Impala, this task primarily involves:
- Deciding how many Impala queries can run concurrently and with how much memory, through the admission control feature. See Admission Control and Query Queuing for details.
- Dividing cluster resources such as memory between Impala and other components, using YARN for overall resource management, and Llama to mediate resource requests from Impala to YARN. See Resource Management for details.