Parquet Strata/Hadoop World, New York 2013

Parquet is a columnar storage format for Hadoop data. It was developed collaboratively by Twitter and Cloudera to address the need for efficient analytics on large datasets. Parquet provides more efficient compression and I/O compared to row-based formats by only reading and decompressing the columns needed by a query. It has been adopted by many companies for analytics workloads involving terabyt

[kimutansk]

RowGroup毎にColumnChankを用意することでカラムベースの読み込みを効率化しているわけですか。なるほど・・とはいえ、読み込む際に相応の対応が必要にはなりますが。