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Analyzing OnTime datasets with Databend on AWS EC2 and S3

Analyzing OnTime datasets on AWS EC2 and S3 with Databend step by step.

Step 1. Deploy environment​

  • EC2 size : c5a.4xlarge

    EC2 region: <your S3 bucket region>

    local disk 300G, local disk only used for ontime save and databend complie.

  • Os Type: ubuntu 20 x64

  • Prepare install package:

    $sudo apt-get install unzip make mysql-client-core-8.0

Step 2. Deploy Databend​

2.1 Compile Databend​

$git clone https://github.com/datafuselabs/databend.git

$cd databend

$make setup

$export PATH=$PATH:~/.cargo/bin

$make build-native

Finally, the databend-related binary files are at ./target/release/{databend-meta, databend-query}

2.2 Start Databend​

# Please replace the s3 env config with your own. 
export STORAGE_TYPE=s3
export S3_STORAGE_BUCKET=<your-s3-bucket>
export S3_STORAGE_REGION=<your-s3-region>
export S3_STORAGE_ENDPOINT_URL=https://s3.amazonaws.com
export S3_STORAGE_ACCESS_KEY_ID=<your-s3-key-id>
export S3_STORAGE_SECRET_ACCESS_KEY=<your-s3-access-key>

echo "Starting standalone DatabendQuery(release)"
./scripts/ci/deploy/databend-query-standalone.sh release

For S3 compatible services, please also set S3_STORAGE_ENDPOINT_URL to your S3 endpoint.

export S3_STORAGE_ENDPOINT_URL=http://127.0.0.1:9000

2.3 Test Databend​

mysql -h 127.0.0.1 -P3307 -uroot

Check connect is ok .

Step 3. Load OnTime datasets​

3.1 Create OnTime table​

wget --no-check-certificate https://repo.databend.rs/t_ontime/create_table.sql

cat create_table.sql |mysql -h 127.0.0.1 -P3307 -uroot

3.2 Load Data into OnTime table​

wget --no-check-certificate https://repo.databend.rs/t_ontime/t_ontime.csv.zip

unzip t_ontime.csv.zip

ls *.csv|xargs -I{} echo  curl -H \"insert_sql:insert into ontime format CSV\" -H \"skip_header:0\" -H \"field_delimiter:'\t'\"  -F  \"upload=@{}\"  -XPUT http://localhost:8001/v1/streaming_load |bash

Step 4. Queries​

Execute Query and set settings:

mysql -h 127.0.0.1 -P3307 -uroot 
mysql>set parallel_read_threads=4;
mysql>select count(*) from ontime;
mysql>select Year, count(*) from ontime group by Year;

All Queries:

NumberQuery
Q1SELECT DayOfWeek, count(*) AS c FROM ontime WHERE Year >= 2000 AND Year <= 2008 GROUP BY DayOfWeek ORDER BY c DESC;
Q2SELECT DayOfWeek, count(*) AS c FROM ontime WHERE DepDelay>10 AND Year >= 2000 AND Year <= 2008 GROUP BY DayOfWeek ORDER BY c DESC;
Q3SELECT Origin, count(*) AS c FROM ontime WHERE DepDelay>10 AND Year >= 2000 AND Year <= 2008 GROUP BY Origin ORDER BY c DESC LIMIT 10;
Q4SELECT IATA_CODE_Reporting_Airline AS Carrier, count() FROM ontime WHERE DepDelay>10 AND Year = 2007 GROUP BY Carrier ORDER BY count() DESC;
Q5SELECT IATA_CODE_Reporting_Airline AS Carrier, avg(cast(DepDelay>10 as Int8))*1000 AS c3 FROM ontime WHERE Year=2007 GROUP BY Carrier ORDER BY c3 DESC;
Q6SELECT IATA_CODE_Reporting_Airline AS Carrier, avg(cast(DepDelay>10 as Int8))*1000 AS c3 FROM ontime WHERE Year>=2000 AND Year <=2008 GROUP BY Carrier ORDER BY c3 DESC;
Q7SELECT IATA_CODE_Reporting_Airline AS Carrier, avg(DepDelay) * 1000 AS c3 FROM ontime WHERE Year >= 2000 AND Year <= 2008 GROUP BY Carrier;
Q8SELECT Year, avg(DepDelay) FROM ontime GROUP BY Year;
Q9SELECT Year, count(*) as c1 FROM ontime GROUP BY Year;
Q10SELECT avg(cnt) FROM (SELECT Year,Month,count(*) AS cnt FROM ontime WHERE DepDel15=1 GROUP BY Year,Month) a;
Q11SELECT avg(c1) FROM (SELECT Year,Month,count(*) AS c1 FROM ontime GROUP BY Year,Month) a;
Q12SELECT OriginCityName, DestCityName, count(*) AS c FROM ontime GROUP BY OriginCityName, DestCityName ORDER BY c DESC LIMIT 10;
Q13SELECT OriginCityName, count(*) AS c FROM ontime GROUP BY OriginCityName ORDER BY c DESC LIMIT 10;
Q14SELECT count(*) FROM ontime;