Keeping Small Queries Fast – Short query optimizations in Apache Impala
Cloudera
NOVEMBER 13, 2020
Metadata Caching. This is used to provide very low latency access to table metadata and file locations in order to avoid making expensive remote RPCs to services like the Hive Metastore (HMS) or the HDFS Name Node, which can be busy with JVM garbage collection or handling requests for other high latency batch workloads.
Let's personalize your content