secondo/Algebras/Hadoop/Parallel_BerlinMOD

# The Parallel BerlinMOD is set up based on the common BerlinMOD benchmark. 
# It process both the data generation and all OBA queries on Parallel SECONDO, in a parallel way. 
# A Parallel SECONDO should be installed at first. 
# It contains following files: 
# 	* The parallel generator
#	* Two parallel query scripts: BerlinMOD_Parallel_CreateObjects.SEC and BerlinMOD_Parallel_OBA-Queries.SEC
#	* Two sequential query scripts: BerlinMOD_Sequential_CreateObjects.SEC and BerlinMOD_Sequential_OBA-Queries.SEC
#	* A comparison script BerlinMOD_Parallel_Verification.SEC
# All scripts are SECONDO scripts, runnable in a text terminal provided by SECONDO

# The parallel generator generates the benchmark data for BerlinMOD. 
# Its detailed explanation is contained inside itself. 

# The parallel query scripts are consisting of two files. 
# The BerlinMOD_Parallel_CreateObjects.SEC creates a set of auxiliary objects required by the parallel queries. 
# The BerlinMOD_Parallel_OBA-Queries.SEC contains all 17 OBA queries in BerlinMOD benchmark. 
# They are adapted to the common BerlinMOD queries, and all can run in parallel way. 

# The sequential query scripts also are consisting of two files. 
# The BerlinMOD_Sequential_CreateObjects.SEC creates a set of auxiliary objects required by the sequential queries. 
# It is almost the same as the CreateObjects.SEC file provided in the normal BerlinMOD benchmark. 
# The BerlinMOD_Sequential_OBA-Queries.SEC contains all 17 OBA queries in BerlinMOD benchmark. 
# They are all normal sequential queries, being the same as the normal BerlinMOD OBA queries. 

# The comparison script estimate the correctness of parallel queries, 
# by comparing whether the parallel query result is the same as the sequential query result.