HoloClean is built over Spark and PyTorch.
v0.1.1
HoloClean is a statistical inference engine to impute, clean, and enrich data. As a weakly supervised machine learning system, HoloClean leverages available quality rules, value correlations, reference data, and multiple other signals to build a probabilistic model that accurately captures the data generation process, and uses the model in a variety of data curation tasks. HoloClean allows data practitioners and scientists to save the enormous time they spend in building piecemeal cleaning solutions, and instead, effectively communicate their domain knowledge in a declarative way to enable accurate analytics, predictions, and insights form noisy, incomplete, and erroneous data.
This file will go through the steps needed to install the required packages and software to run HoloClean.
1.1 Ubuntu Installation:
Install Postgres by running:
sudo apt-get install postgresql postgresql-contrib
1.2 Using Postgres on Ubuntu
To start postgres run:
sudo -u postgres psql
1.3 Mac Installation
Check out the following page to install Postgres for MacOS
https://www.postgresql.org/download/macosx/
1.4 Setup Postgres for Holoclean
Create the database and user by running the following on the Postgres console:
CREATE database holo;
CREATE user holocleanuser;
ALTER USER holocleanuser WITH PASSWORD 'abcd1234';
GRANT ALL PRIVILEGES on database holo to holocleanUser ;
\c holo
ALTER SCHEMA public OWNER TO holocleanUser;
In general, to connect to the holo database run:
\c holo
HoloClean currently appends new tables to the database holo with each instance that is ran. To clear the database, open PSQL with holocleanUser and run:
drop database holo;
create database holo;
Or alternatively use the function reset_database() function in the Holoclean class in holoclean/holoclean.py
2.1 For Ubuntu:
Check if you have JDK 8 installed by running
java -version
If you do not have JDK 8, run the following command:
sudo apt-get install openjdk-8-jre
2.2 For MacOS
Check if you have JDK 8 by running
/usr/libexec/java_home -V
If you do not have JDK 8, download and install JDK 8 for MacOS from the oracle website: http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
To install Spark on MacOS run
brew install apache-spark
After installation of spark, add a SPARK_HOME environment variable to your shell by running the set_env.sh script, and add /usr/local/Cellar/apache-spark/<version>/libexec/python to
your python path.
In the python 2.7 environment of your choice (conda, virtualenv, etc.) cd into this repositories root folder and run
python setup.py install
To get started, the following tutorials in the tutorial directory will get you familiar with the HoloClean framework
To run the tutorials in Jupyter Notebook go to the root directory in the terminal and run
./start_notebook.sh
Data Loading & Denial Constraints Tutorial
Complete Pipeline
Error Detection
Follow the steps from Installation to configure your development environment.
To run unit tests
$ cd tests/unit_tests
$ python unittest_dcfeaturizer.py
2018-04-05 15:15:22 WARN Utils:66 - Your hostname, apollo resolves to a loopback address: 127.0.1.1; using 192.168.0.66 instead (on interface wlan0)
2018-04-05 15:15:22 WARN Utils:66 - Set SPARK_LOCAL_IP if you need to bind to another address
2018-04-05 15:15:23 WARN NativeCodeLoader:62 - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Setting default log level to "WARN".
To adjust logging level use sc.setLogLevel(newLevel). For SparkR, use setLogLevel(newLevel).
Time to Load Data: 11.9292609692
Time for Error Detection: 14.7168970108
.
----------------------------------------------------------------------
Ran 1 test in 28.680s
OK
$
$ python unittest_sql_dcerrordetector.py
2018-04-05 15:16:28 WARN Utils:66 - Your hostname, apollo resolves to a loopback address: 127.0.1.1; using 192.168.0.66 instead (on interface wlan0)
2018-04-05 15:16:28 WARN Utils:66 - Set SPARK_LOCAL_IP if you need to bind to another address
2018-04-05 15:16:29 WARN NativeCodeLoader:62 - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
Setting default log level to "WARN".
To adjust logging level use sc.setLogLevel(newLevel). For SparkR, use setLogLevel(newLevel).
Time to Load Data: 12.6399619579
Time for Error Detection: 14.1602239609
.Time to Load Data: 1.38744020462
Time for Error Detection: 8.26235389709
.Time to Load Data: 0.998204946518
Time for Error Detection: 8.1832909584
.Time to Load Data: 1.46859908104
Time for Error Detection: 6.7251560688
.
----------------------------------------------------------------------
Ran 4 tests in 62.365s
OK
To run integration tests
cd tests
python test.py
Successful tests run looks like:
<output>
Time for Test Featurization: 3.3679060936
Time for Inference: 0.249126911163
The multiple-values precision that we have is :0.998899284535
The multiple-values recall that we have is :0.972972972973 out of 185
The single-value precision that we have is :1.0
The single-value recall that we have is :1.0 out of 0
The precision that we have is :0.999022801303
The recall that we have is :0.972972972973 out of 185
Execution finished