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Allow Impala to start only with a running HMS (and no additional services like HDFS, HBase, Hive, YARN) and use the local file system. Skip all tests that need these services, use HDFS caching or assume that multiple impalads are running. To run Impala with the local filesystem, set TARGET_FILESYSTEM to 'local' and WAREHOUSE_LOCATION_PREFIX to a location on the local filesystem where the current user has permissions since this is the location where the test data will be extracted. Test coverage (with core strategy) in comparison with HDFS and S3: HDFS 1348 tests passed S3 1157 tests passed Local Filesystem 1161 tests passed Change-Id: Ic9718c7e0307273382b1cc6baf203ff2fb2acd03 Reviewed-on: http://gerrit.cloudera.org:8080/1352 Reviewed-by: Alex Behm <alex.behm@cloudera.com> Tested-by: Internal Jenkins Readability: Alex Behm <alex.behm@cloudera.com>