QueryBot 5000 (QB5000) is a robust forecasting framework that allows a DBMS to predict the expected arrival rate of queries in the future based on historical data. This is the source code for our SIGMOD paper: Query-based Workload Forecasting for Self-Driving Database Management Systems.
./run.sh
We provide an example of the workload forecasting for a sample subset of BusTracker workload. The prediction specified in the script is on 1 hour interval and 3 day horizon. The predicted arrival rates with different models for each cluster are in the prediction-results folder. All the query templates of the workload can be found at templates.txt.
The default experimental setting is to run under CPU. If you have a GPU, you can change this parameter to True to enable GPU training.
python>=3.5 scikit-learn>=0.18.1 sortedcontainers>=1.5.7 statsmodels>=0.8.0 scipy>=0.19.0 numpy>=1.14.2 pytorch>=0.2.0_1 (you need to install the GPU version if you want to use GPU)
We first anonymize all the queries from the real-world traces used in our experiments for privacy purposes. The components below use the anonymization results from this step as their input.
cd anonymizer
./log-anonymizer.py --help
This component extracts the templates from the anonymized queries and records the arrival rate history for each template.
cd pre-processor
./templatizer.py --help
This component groups query templates with similar arrival rate patterns into clusters.
cd clusterer
./online_clustering.py --help
generate-cluster-coverage.py generates the time series for the largest MAX_CLUSTER_NUM clusters on each day, which are used in the forecasting evaluation.
This component uses a combination of linear regression, recurrent neural network, and kernel regression to predict the arrival rate pattern of each query cluster on different prediction horizons and intervals.
cd forecaster
./exp_multi_online_continuous.py --help
This simulator populates a synthetic database with a given schema file, removes all the secondary indexes, replays the query trace of the workload, and builds appropriate indexes with the real-time workload forecasting results.
cd workload-simulator
./workload-simulator.py --help
Due to legal and privacy constraints, unfortunately we cannot publish the full datasets that we used in the experiments for the publication (especially for the two student-related Admissions and MOOC workloads). To the best of our effort, we managed to publish a subset (2% random sampling) of the BusTracker workload trace and the schema file here: http://www.cs.cmu.edu/~malin199/data/tiramisu-sample/
We use this script to generate the sample subset of the original workload trace.
This repo does not have an end-to-end running framework. We build different components separately and pass the results through a workload simulator that connects to MySQL/PostgreSQL for experimental purposes. We are integrating the full framework into Peloton Self-Driving DBMS. Please check out our source code there for more reference.
Copyright 2018, Carnegie Mellon University
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