nebula-bench

中文文档

Nebula-Bench is a tool to test the nebula-graph benchmark by using LDBC dataset.

Currently, we use ldbc_snb_datagen v0.3.3. It only support nebula graph 2.0+ release.

The main features:

• Generate the LDBC dataset and then import into nebula-graph.
• nebula-graph benchmark. (WIP)

How to use

prepare

sudo yum install -y git \
                    make \
                    file \
                    libev \
                    libev-devel \
                    gcc \
                    wget \
                    python3 \
                    python3-devel \
                    java-1.8.0-openjdk \
                    maven 

git clone https://github.com/vesoft-inc/nebula-bench.git 
cd nebula-bench
pip3 install --user -r requirements.txt
python3 run.py --help

prepare nebula tools.

• nebula-importer
• xk6-nebula

/bin/bash scripts/setup.sh

After compilation, it would put binaries in scripts folder.

generate ldbc data

python3 run.py data 

It would download the Hadoop automaticly, build the datagen jar, and then generate ldbc data.

To import the data more easier, split the file header to a header.csv file. The result files in ${PWD}/target/data/test_data/

More information

# generate sf10 ldbc data
python3 run.py data  -s 10

# change hadoop options
export HADOOP_CLIENT_OPTS="-Xmx8G"
python3 run.py data -s 100

# only generate, do not split the data
python3 run.py data -og

# split data, no need generate again.
python3 run.py data -os

import data into nebula-graph

python3 run.py nebula importer

Render the import config file according to the header files, and then run nebula-importer.

# after prepare the data, you could import the data to any nebula graph as you want.
# space is mytest, graph address is 127.0.0.1:9669
python3 run.py nebula importer -s mytest -a 127.0.0.1:9669

# or using dotenv
cp env .env
# vi .env
python3 run.py nebula importer

# dry run, just create the import config file, and you can modify any configuration.
# by default, PARTITION_NUM is 24,REPLICA_FACTOR is 3.
python3 run.py nebula importer --dry-run

nebula benchmark

Use k6 with xk6-nebula extension.

Scenarios are in nebula_bench/scenarios/.

# show help
python3 run.py stress run --help

# run all scenarios with 100 virtual users, every scenario lasts 60 seconds.
python3 run.py stress run 

# run all scenarios with 10 virtual users, every scenario lasts 3 seconds.
python3 run.py stress run -vu 10 -d 3

# list all stress test scenarios
python3 run.py stress scenarios

# run go.Go1Step scenarios with 10 virtual users, every scenario lasts 3 seconds.
python3 run.py stress run -vu 10 -d 3 -scenario go.Go1Step

k6 config file, summary result and outputs are in output folder. e.g.

# you should install jq to parse json.
# how many checks
jq .metrics.checks output/result_Go1Step.json

# summary latency
jq .metrics.latency output/result_Go1Step.json

# summary error message 
awk -F ',' 'NR>1{print $NF}' output/output_Go1Step.csv |sort|uniq -c

or, just review the sumary result in stdout. e.g.

     ✓ IsSucceed

     █ setup

     █ teardown

     checks...............: 100.00% ✓ 113778      ✗ 0
     data_received........: 0 B     0 B/s
     data_sent............: 0 B     0 B/s
     iteration_duration...: min=747.84µs avg=52.76ms      med=40.77ms max=1.17s   p(90)=98.68ms p(95)=147.15ms  p(99)=263.03ms
     iterations...........: 113778  1861.550127/s
     latency..............: min=462      avg=49182.770298 med=37245   max=1160358 p(90)=93377   p(95)=142304.15 p(99)=258465.89
     responseTime.........: min=662      avg=52636.793537 med=40659   max=1177651 p(90)=98556.5 p(95)=147036.15 p(99)=262869.63
     vus..................: 100     min=0         max=100
     vus_max..............: 100     min=100       max=100

As one iteration has one check, it means run 113778 queries.

The unit of latency is us.

and more

• The file with aaa_xxYY_bbb format, like comment_hasTag_tag, should be an edge, and the edge name shoud be XX_YY. Keep the same format with ldbc_snb_interactive
• Otherwise it should be a vertex tag.
• Different entity types might have same ID (e.g. Forum and Post).