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The schema file allows specifying a commandline command in several of the sections (LOAD, DEPENDENT_LOAD, etc). These are execute by testdata/bin/generate-schema-statements.py when it is creating the SQL files that are later executed for dataload. A fair number of tables use this flexibility to execute hdfs mkdir and copy commands via the command line. Unfortunately, this is very inefficient. HDFS command line commands require spinning up a JVM and can take over one second per command. These commands are executed during a serial part of dataload, and they can be executed multiple times. In short, these commands are a significant slowdown for loading the functional tables. This converts the hdfs command line statements to equivalent Hive LOAD DATA LOCAL statements. These are doing the copy from an already running JVM, so they do not need JVM startup. They also run in the parallel part of dataload, speeding up the SQL generation part. This speeds up generate-schema-statements.py significantly. On the functional dataset, it saves 7 minutes. Before: time testdata/bin/generate-schema-statements.py -w functional-query -e exhaustive -f real 8m8.068s user 10m11.218s sys 0m44.932s After: time testdata/bin/generate-schema-statements.py -w functional-query -e exhaustive -f real 0m35.800s user 0m42.536s sys 0m5.210s This is currently a long-pole in dataload, so it translates directly to an overall speedup of about 7 minutes. Testing: - Ran debug tests Change-Id: Icf17b85ff85618933716a80f1ccd6701b07f464c Reviewed-on: http://gerrit.cloudera.org:8080/15228 Reviewed-by: Joe McDonnell <joemcdonnell@cloudera.com> Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>
This directory contains Impala test workloads. The directory layout for the workloads should follow: workloads/ <data set name>/<data set name>_dimensions.csv <- The test dimension file <data set name>/<data set name>_core.csv <- A test vector file <data set name>/<data set name>_pairwise.csv <data set name>/<data set name>_exhaustive.csv <data set name>/queries/<query test>.test <- The queries for this workload