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44 lines
2.2 KiB
Plaintext
44 lines
2.2 KiB
Plaintext
Folder structure
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dump_dataset_from_ch.sh - bash script that dumps a dataset from Clickhouse
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schema.sql - schema for a Greenplum cluster to load dumped dataset in
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load_data_set.sql - the script that loads up a dumped dataset
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queries.sql - SQL statements used in the benchmark
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benchmark.sh - this piece of bash conducts a benchmark
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result_parser.py - script to parse benchmark.sh's output and produce python code to build a graph to compare up to 4 benchmark results.
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Requirements
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Greenplum uses a separate server as a point of entry, so you need 2 servers at least to run a cluster: master and segment hosts. 2 segments host and 56 segments(28 per host) had been used while conducting the test.
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You has has to put segment hostnames in the benchmark.sh.
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Greenplum quick installation instructions
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Obtain a stable Greenplum version here(4.3.9.1 was used while conducting the benchmark):
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https://network.pivotal.io/products/pivotal-gpdb
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and install it using this detailed guide:
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http://gpdb.docs.pivotal.io/4340/install_guide/install_guide.html
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You should change gp_interconnect_type to 'tcp' if cluster members are connected via 1GB link or lower.
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There are some variables that has to be changed prior the first benchmark run: gp_vmem_protect_limit and max_statement_mem to allow each segment to use more virtual memory. Here are commands to change this GUCS that has to be executed as gpadmin at the master host:
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gpconfig -c gp_interconnect_type -v tcp
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gpconfig -c gp_vmem_protect_limit -v 3000
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gpconfig -c max_statement_mem -v '4000MB'
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How to prepare data
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-------------------
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One can prepare datasets to run the benchmark on using dump_dataset_from_ch.sh script from this repo. The script has to be run at at Clickhouse host. It takes a long time to get dumps.
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Upload the datasets into Greenplum master.Then run schema.sql to prepare schema and load_data_set.sql to load data up. This operation also takes a long time.
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How to conduct the benchmark
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There is a benchmark.sh that take some arguments. Here is the syntax:
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./benchmark.sh sql_statements_file tablename dbname orca_switch
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If you don't know about the last one then just use a default value.
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