Evaluation of cloudera impala 1.1

This document evaluates the performance of Cloudera Impala 1.1 using two clusters. It finds that RCFile with Snappy compression provides the fastest performance for both Hive and Impala on the clusters for reading-only workloads. Parquet with Snappy may be fastest for larger tables. Issues were identified with memory limits during Parquet table creation and were later fixed. The evaluation shows I

[daisukebe]

Great!!!!!!!!

[tagomoris]

たいへん参考になる / UDFマダー？