Evaluation of distributed open source solutions in CERN database use cases HEPiX, spring 2015 Kacper Surdy IT-DB-DBF M. Grzybek, D. L. Garcia, Z. Baranowski,

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Presentation transcript:

Evaluation of distributed open source solutions in CERN database use cases HEPiX, spring 2015 Kacper Surdy IT-DB-DBF M. Grzybek, D. L. Garcia, Z. Baranowski, L. Canali, E. Grancher

Motivations propose better suited solution for big volumes of read-only data open new possibilities for data analysis offload Oracle in data warehouse workloads our users ask for this! 3

Hadoop evaluation One interface (SQL) Different use cases from CERN LHC log, Controls data, Atlas jobs manager (PANDA) Different query engines Different approaches for storing data 4

Query engines Apache Hive SQL -> MapReduce jobs Cloudera Impala Custom SQL planner and executor Uses Hive metastore Apache Spark SQL Spark lightweight threading execution Can use Hive metastore 5

Data formats Data storage format and compression type make a difference data volume IO vs. CPU bound throughput benefits of columnar storage partitioning

Data formats CSV human readable

Data formats CSV human readable SequenceFile flat set of binary stored (key, value) pairs

Data formats CSV human readable SequenceFile flat set of binary stored (key, value) pairs Apache Avro binary serializing standard

Data formats CSV human readable SequenceFile flat set of binary stored (key, value) pairs Apache Avro binary serializing standard Parquet binary columnar-storage

Potential columnar store benefit

Scalability - Impala

Scalability - Hive

Scalability – Spark SQL

Summary Data format choice is a key Heterogeneous data in the same place No matter what interface -> it scales