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Data meets AI - AICUG - Santa Clara
1.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | When Data meets AI AICUG Meetup – Santa Clara , Oracle Sandesh Rao VP AIOps , Autonomous Database
2.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Safe Harbor Statement The following is intended to outline our general product direction. It is intended for information purposes only, and may not be incorporated into any contract. It is not a commitment to deliver any material, code, or functionality, and should not be relied upon in making purchasing decisions. The development, release, timing, and pricing of any features or functionality described for Oracle’s products may change and remains at the sole discretion of Oracle Corporation.
3.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | whoami Real Application Clusters - HA DataGuard- DR Machine Learning- AIOps Enterprise Management Sharding Big Data Operational Management Home Automation Geek @sandeshr https://www.linkedin.com/in/raosandesh/
4.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Agenda • What motivated us to go into Machine Learning ? • Which algorithms, tools & technologies are used? • Oracle & Machine Learning initiatives and tools • Cx_oracle and OML4Py - • Questions and Open Talk
5.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | 5 Why Machine Learning for us and why now? • Lots of Data generated as exhaust from systems – Cloud , different formats and interfaces , frameworks • Machine Learning has become accessible – Anyone can be a Data Scientist – Algorithms are accessible as libraries aka scikit , keras , tensorflow .. – Sandbox to get started as easy as a docker init • Business use cases • How to find value from the data , fewer guesses to make decisions
6.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | ML Project Workflow • Set Business Objectives • Gather , Prepare and Cleanse Data • Model Data – Feature Extraction , Test , Train , Optimizer – Loss Function , effectiveness – Framework and Library to use • Apply the Model as an inference engine – Decision making using the Model’s output – Tune Model till outcome is closer to Business Objective 6 Set Business Objectives Understand Use case Create Pseudo Code Synthetic Data Generation Pick Tools and Frameworks Train Test Model Deploy Model Measure Results and Feedback
7.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Types of Machine Learning Supervised Learning Predict future outcomes with the help of training data provided by human experts Semi-Supervised Learning Discover patterns within raw data and make predictions, which are then reviewed by human experts, who provide feedback which is used to improve the model accuracy Unsupervised Learning Find patterns without any external input other than the raw data Reinforcement Learning Take decisions based on past rewards for this type of action 7
8.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | • Hierarchical k-means, Orthogonal Partitioning Clustering, Expectation- Maximization Clustering Feature Extraction/Attribute Importance / Component Analysis • Decision Tree, Naive Bayes, Random Forest, Logistic Regression, Support Vector Machine Classification 8 Machine Learning Algorithms • Multiple Regression, Support Vector Machine, Linear Model, LASSO, Random Forest, Ridge Regression, Generalized Linear Model, Stepwise Linear Regression Regression Association & Collaborative Filtering Reinforcement Learning - brute force, Monte Carlo, temporal difference.... • Many different use cases Neural network & deep Learning with Deep Neural Network
9.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Modeling Phase – AutoML to the rescue Provide Dataset to AutoML2 Configuration parameters for model picked Dataset is divided into training set & testing set Actual Training Evaluate performance of trained model Tweak model parameters, change predictors change test/train data splits and change algorithms Pick model plus parameters depending on outcome and measure , F1 , Precision , Recall , MSE Document all runs and apply A/B testing to see what the variations produce 9
10.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | 10 Tools & Libraries Assisting ML projects
11.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | What is Oracle Doing Around Machine Learning? • Big Data Appliance • Big Data Discovery , Big Data Preparation Data Visualization Cloud • Analytics Cloud – Sales, Marketing, HCM on top of SaaS • DaaS – Oracle Data Cloud , Eloqua .. • Oracle Labs (labs.oracle.com) – Machine Learning Research Group • Autonomous Database – Zeppelin Notebooks preloaded with use cases – Applied Machine Learning used for Implementing AIOps 11
12.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Oracle AI Platform Cloud Service – Coming Soon… • Collaborative end-to-end machine learning in the cloud • Enables data science teams to – Organize their work – Access data and computing resources – Build , Train , Deploy – Manage models • Collaborative , Self-Service , Integrated • https://cloud.oracle.com/en_US/ai-platform 12
13.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Oracle Autonomous Data Warehouse Cloud Key Features Highly Elastic Independently scale compute and storage, without having to overpay for fixed blocks of resources Built-in Web-Based SQL ML Tool Apache Zeppelin Oracle Machine Learning notebooks ready to run ML from browser Database migration utility Dedicated cloud-ready migration tools for easy migration from Amazon Redshift, SQL Server and other databases Enterprise Grade Security Data is encrypted by default in the cloud, as well as in transit and at rest High-Performance Queries and Concurrent Workloads Optimized query performance with preconfigured resource profiles for different types of users Oracle SQL Autonomous DW Cloud is compatible with all business analytics tools that support Oracle Database Self Driving Fully automated database for self-tuning patching and upgrading itself while the system is running Cloud-Based Data Loading Fast, scalable data-loading from Oracle Object Store, AWS S3, or on-premises 13 Oracle Machine Learning
14.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Oracle Machine Learning and Advanced Analytics • Support multiple data platforms, analytical engines, languages, UIs and deployment strategies Strategy and Road Map Big Data / Big Data Cloud Relational ML Algorithms Common core, parallel, distributed SQL R, Python, etc.GUI Data Miner, RStudio Notebooks Advanced Analytics Oracle Database Cloud DWCS
15.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | CLASSIFICATION – Naïve Bayes – Logistic Regression (GLM) – Decision Tree – Random Forest – Neural Network – Support Vector Machine – Explicit Semantic Analysis CLUSTERING – Hierarchical K-Means – Hierarchical O-Cluster – Expectation Maximization (EM) ANOMALY DETECTION – One-Class SVM TIME SERIES – Holt-Winters, Regular & Irregular, with and w/o trends & seasonal – Single, Double Exp Smoothing REGRESSION – Linear Model – Generalized Linear Model – Support Vector Machine (SVM) – Stepwise Linear regression – Neural Network – LASSO ATTRIBUTE IMPORTANCE – Minimum Description Length – Principal Comp Analysis (PCA) – Unsupervised Pair-wise KL Div – CUR decomposition for row & AI ASSOCIATION RULES – A priori/ market basket PREDICTIVE QUERIES – Predict, cluster, detect, features SQL ANALYTICS – SQL Windows, SQL Patterns, SQL Aggregates A1 A2 A3 A4 A5 A6 A7 • OAA (Oracle Data Mining + Oracle R Enterprise) and ORAAH combined • OAA includes support for Partitioned Models, Transactional, Unstructured, Geo-spatial, Graph data. etc, Oracle’s Machine Learning & Adv. Analytics Algorithms FEATURE EXTRACTION – Principal Comp Analysis (PCA) – Non-negative Matrix Factorization – Singular Value Decomposition (SVD) – Explicit Semantic Analysis (ESA) TEXT MINING SUPPORT – Algorithms support text type – Tokenization and theme extraction – Explicit Semantic Analysis (ESA) for document similarity STATISTICAL FUNCTIONS – Basic statistics: min, max, median, stdev, t-test, F-test, Pearson’s, Chi-Sq, ANOVA, etc. R PACKAGES – CRAN R Algorithm Packages through Embedded R Execution – Spark MLlib algorithm integration EXPORTABLE ML MODELS – C and Java code for deployment
16.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Oracle Machine Learning Key Features • Collaborative UI for data scientists – Packaged with Autonomous Data Warehouse Cloud (V1) – Easy access to shared notebooks, templates, permissions, scheduler, etc. – SQL ML algorithms API (V1) – Supports deployment of ML analytics Machine Learning Notebook for Autonomous Data Warehouse Cloud
17.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Oracle Machine Learning UI in ADW
18.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. |
19.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. |
20.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | AI and ML with Python and Oracle 1 2 3 What is Python Oracle’s Advanced Analytics cx_Oracle Package Oracle Machine Learning for Python 20 4
21.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | What is Python? • An interpreted, object-oriented, high level, general purpose programming language • Designed for rapid application development and scripting to connect existing components • Open source scripting language and environment https://www.python.org • Created in the late 1980s • World-wide usage – Widely taught in Universities – Many Data Scientists know and use Python • Thousands of open source packages to enhance productivity 21
22.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Popularity by question views for major PLs Growth of major programming languages using Stack Overflow question views 22 https://insights.stackoverflow.com/trends?tags=python%2Cjavascript%2Cjava%2Cc%23%2Cphp%2Cc%2B%2B&utm_source=so -owned&utm_medium=blog&utm_campaign=gen-blog&utm_content=blog-link&utm_term=incredible-growth-python
23.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Why use Python? 23 Small Resembles English Many third-party libraries Strict punctuation rules Uniform code formatting PyPI – 168203 projects https://pypi.python.org/pypi Wide-spread user groupsSimple language Heavily used for websites Increasingly used by data scientists
24.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Python IDEs 24
25.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | OAC/OBIEE/ODV Oracle Database Enterprise Edition Oracle’s Advanced Analytics Multiple interfaces across platforms — SQL, R, Python*, GUI, Dashboards, Apps Oracle Advanced Analytics - Database Option SQL, R & Python* Integration for Scalable, Distributed, Parallel in-Database ML Execution SQL Developer/ Oracle Data Miner ApplicationsR & Python* Clients Data / Business AnalystsR & Python programmers Business Analysts/Mgrs Domain End UsersUsers Platform Hadoop Oracle R Advanced Analytics for Hadoop Big Data Connectors Parallel, distributed Spark-based algorithms Oracle Cloud 25 Oracle Database * Not yet released
26.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Oracle Advanced Analytics differentiators Work directly with data in Database and Hadoop • Eliminate need to request extracts from IT/DBA – immediate access to database and Hadoop data • Process data where they reside – minimize or eliminate data movement Scalability and Performance • Use parallel, distributed algorithms that scale to big data on Oracle Database and Hadoop platforms • Leverage powerful engineered systems to build models on billions of rows of data or millions of models in parallel Ease of deployment • Using Oracle Database, place Python, R, and SQL scripts immediately in production (no need to recode) • Use production quality infrastructure without custom plumbing or extra complexity Process support • Maintain and ensure data security, backup, and recovery using existing processes • Store, access, manage, and track analytics objects (models, scripts, workflows, data) in Oracle Database 26
27.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Oracle’s Python Technologies Supporting Oracle Database • cx_Oracle package • Oracle Machine Learning for Python Component of the Oracle Advanced Analytics option to Oracle Database 27
28.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | cx_Oracle • Python package enabling scalable and performant connectivity to Oracle Database – Open source, publicly available on PyPI, OTN, and github – Oracle is maintainer • Oracle Database Interface for Python conforming to Python DB API 2.0 specification – Optimized driver based on OCI – Execute SQL statements from Python – Enables transactional behavior for insert, update, and delete Oracle Database cx_Oracle 28
29.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | cx_Oracle - Requirements • Easily installed from PyPI • Support for Python 2 and 3 • Support for Oracle Client 11.2, 12.1, 12.2, 18 – Oracle's standard cross-version interoperability, allows easy upgrades and connectivity to different Oracle Database versions • Connect to Oracle Database 9.2, 10, 11, 12, 18 – (Depending on the Oracle Client version used) • SQL and PL/SQL Execution – Underlying Oracle Client libraries have optimizations: compressed fetch, pre-fetching, client and server result set caching, and statement caching with auto-tuning 29
30.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | cx_Oracle Example import cx_Oracle con = cx_Oracle.connect('pythonhol/welcome@127.0.0.1/orcl') print(con.version) con.close() con = cx_Oracle.connect('pythonhol', 'welcome', '127.0.0.1:/orcl:pooled', cclass = "HOL", purity = cx_Oracle.ATTR_PURITY_SELF) con.close() 30
31.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | cx_Oracle Example cur = con.cursor() # opens cursor for statements to use cur.execute('select * from departments order by department_id') for result in cur: # prints all data print(result) #or row = cur.fetchone() # return a single row as tuple and advance row print(row) row = cur.fetchone() print(row) #or res = cur.fetchmany(numRows=3) # returns list of tuples print(res) cur.close() con.close() 31
32.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Data Types (1) Full listing for cx_Oracle cx_Oracle Type Oracle Type Python Type cx_Oracle.BINARY RAW bytes (Python 3), str (Python 2) cx_Oracle.BFILE BFILE cx_Oracle.LOB cx_Oracle.BOOLEAN boolean (PL/SQL only) bool cx_Oracle.CLOB CLOB cx_Oracle.LOB cx_Oracle.CURSOR REF CURSOR cx_Oracle.Cursor cx_Oracle.DATETIME DATE datetime.datetime cx_Oracle.FIXED_CHAR CHAR str cx_Oracle.FIXED_NCHAR NCHAR str (Python 3), unicode (Python 2) cx_Oracle.INTERVAL INTERVAL DAY TO SECOND datetime.timedelta cx_Oracle.LOB CLOB, BLOB, BFILE, NCLOB cx_Oracle.LOB cx_Oracle.LONG_BINARY LONG RAW bytes (Python 3), str (Python 2) 32
33.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Data Types (2) Full listing for cx_Oracle cx_Oracle Type Oracle Type Python Type cx_Oracle.LONG_STRING LONG str cx_Oracle.NATIVE_FLOAT BINARY_DOUBLE float cx_Oracle.NATIVE_INT - int (Python 3), long/int (Python 2) cx_Oracle.NCHAR NVARCHAR2 str (Python 3), unicode (Python 2) cx_Oracle.NCLOB NCLOB cx_Oracle.LOB cx_Oracle.NUMBER NUMBER float cx_Oracle.OBJECT instances created by CREATE OR REPLACE TYPE cx_Oracle.Object cx_Oracle.ROWID ROWID str cx_Oracle.STRING VARCHAR2 str cx_Oracle.TIMESTAMP TIMESTAMP, TIMESTAMP WITH TIME ZONE, TIMESTAMP WITH LOCAL TIME ZONE datetime.datetime 33
34.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | 34 Oracle Machine Learning for Python (OML4Py)
35.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Traditional Python and Database Interaction • Access latency • Memory limitation – data size • Single threaded • Paradigm shift: Python à SQL à Python • Ad hoc production deployment • Issues for backup, recovery, security Python script cron job Database Flat Files extract / exportread export load 35 SQL mxODBC, pyodbc, turboodbc, JayDeBeApi, cx_Oracle
36.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Oracle Machine Learning for Python Oracle Advanced Analytics option to Oracle Database >= 18c • Use Oracle Database as HPC environment • Use in-database parallel and distributed machine learning algorithms • Manage Python scripts and Python objects in Oracle Database • Integrate Python results into applications and dashboards via SQL • Produce better models faster with automated machine learning 36 Oracle Database User tables In-db stats Database Server Machine SQL Interfaces SQL*Plus, SQLDeveloper, … Oracle Machine Learning for Python Python Client
37.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Oracle Machine Learning for Python • Transparency layer – Leverage proxy objects so data remain in database – Overload Python functions translating functionality to SQL – Use familiar Python syntax to manipulate database data • Parallel, distributed algorithms – Scalability and performance – Exposes in-database algorithms from Oracle Data Mining • Embedded Python execution – Manage and invoke Python scripts in Oracle Database – Data-parallel, task-parallel, and non-parallel execution – Use open source Python packages • Automated machine learning – Feature selection, model selection, hyper-parameter tuning 37 Oracle Database User tables In-db stats Database Server Machine SQL Interfaces SQL*Plus, SQLDeveloper, … Oracle Machine Learning for Python Python Client
38.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | OML4Py Transparency Layer • Leverages proxy objects for database data: oml.DataFrame # Create table from Pandas DataFrame data DATA = oml.create(data, table = 'BOSTON') # Get proxy object to DB table boston DATA = oml.sync(table = 'BOSTON') • Overloads Python functions translating functionality to SQL • Uses familiar Python syntax to manipulate database data DATA.shape DATA.head() DATA.describe() DATA.std() DATA.skew() train_dat, test_dat = DATA.split() train_dat.shape test_dat.shape 38
39.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Data Transfer-related functions • oml.create(x, table[, oranumber, dbtypes, . . . ]) – Creates a table in Oracle Database from a Pandas DataFrame returning a proxy object • oml.push(x[, oranumber, dbtypes]) – Pushes data to Oracle Database creating a temporary table returning a proxy object • oml.sync(schema=None, regex_match=False, table=None, view=None, query=None) – Creates a DataFrame proxy object in Python that represents an Oracle Database table • oml.drop([table, view]) – Drops the named database table or view • oml.dir() – Returns the names of OML objects in the workspace • oml.cursor() – Returns a cx_Oracle cursor object of the current OML database connection 39
40.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | List of functions on OML DataFrame executed in-database • KFold • append • columns • concat • corr • count • create_view • crosstab • cumsum • describe • drop • drop_duplicates • dropna • head • kurtosis • materialize • max • mean • median • merge • min • nunique • pivot_table • pull • rename • round • select_types • shape • skew • sort_values • split • std • sum • t_dot • tail • types 40
41.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Example – create a DataFrame 41
42.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Example using crosstab on oml.DataFrame 42
43.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | OML4Py 1.0 Machine Learning algorithms in-Database • Decision Tree • Naïve Bayes • Generalized Linear Model • Support Vector Machine • RandomForest • Neural Network Regression • Generalized Linear Model • Neural Network • Support Vector Machine Classification Attribute Importance • Minimum Description Length Clustering • Expectation Maximization • Hierarchical k-Means Feature Extraction • Singular Value Decomposition • Explicit Semantic Analysis Market Basket Analysis • Apriori – Association Rules Anomaly Detection • 1 Class Support Vector Machine …plus open source Python packages for algorithms in combination with embedded Python execution 43 Supports integrated partitioned models, text mining
44.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Connect to the database Client Python Engine OML4Py Python user on laptop Oracle Database Transparency Layer import oml import os sid = os.environ["ORACLE_SID"] oml.connect(user="pyquser", password="pyquser", dsn="(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=...) (PORT=1521))(CONNECT_DATA=(SID=sid)))") oml.isconnected()
45.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Invoke in-database aggregation function Client Python Engine OML4Py Python user on desktop Oracle Database User tables Transparency Layer ONTIME_S = oml.sync(table="ONTIME_S") res = ONTIME_S.crosstab('DEST') type(res) res.head() Source data is a DataFrame, ONTIME_S, which is an Oracle Database table crosstab() function overloaded to accept OML DataFrame objects and transparently generates SQL for execution in Oracle Database Returns an ‘oml.core.frame.DataFrame’ object In-db stats select DEST, count(*) from ONTIME_S group by DEST
46.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | OML4Py Embedded Python def fit(data): from sklearn.svm import LinearSVC x = data.drop('TARGET', axis = 1).values y = data['TARGET'] return LinearSVC().fit(x, y) oml.script.create('sk_svc_fit', fit, overwrite = True) oml.script.dir() mod = oml.table_apply(train_dat, func = 'sk_svc_fit', oml_input_type = 'pandas.DataFrame') 46 Client Python Engine OML4Py User tables pyq*eval () interface 2 3 Oracle Database extproc DB Python Engine 4 OML4Py 1
47.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | oml.group_apply – partitioned data flow Client Python Engine OML4Py User tables DB Python Engine pyq*eval () interface extproc 2 3 4 OML4Py Oracle Database extproc DB Python Engine 4 OML4Py def build_lm(dat): from sklearn import linear_model lm = linear_model.LinearRegression() X = dat[['PETAL_WIDTH']] y = dat[['PETAL_LENGTH']] lm.fit(X, y) return lm index = oml.DataFrame(IRIS['SPECIES']) mods = oml.group_apply( IRIS[:,['PETAL_LENGTH', "PETAL_WIDTH", 'SPECIES']], index, func=build_lm) sorted(mods.pull().items()) 1
48.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Embedded Python Execution functions • oml.do_eval(func[, func_value, func_owner, . . . ]) – Executes the user-defined Python function at the Oracle Database server machine • oml.table_apply(data, func[, func_value, . . . ]) – Executes the user-defined Python function at the Oracle Database server machine supplying data pulled from Oracle Database • oml.row_apply(data, func[, func_value, . . . ]) – Partitions a table or view into row chunks and executes the user-defined python function on each chunk within one or more Python processes running at the Oracle Database server machine • oml.group_apply(data, index, func[, . . . ]) – Partitions a table or view by the values in column(s) specified in index and executes the user-defined python function on those partitions within one or more Python processes running at the Oracle Database server machine • oml.index_apply(times, func[, func_value, . . . ]) – Executes the user-defined python function multiple times inside Oracle Database server
49.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Script repository functions for saving Python scripts in ODB • oml.script.create(name, func[, is_global, . . . ]) – Creates a Python script, which contains a single function definition, in the Oracle Database Python script repository • oml.script.dir([name, regex_match, sctype]) – Lists the scripts present in the Oracle Database Python script repository • oml.script.load(name[, owner]) – Loads the named script from the Oracle Database Python script repository as a callable object • oml.script.drop(name[, is_global, silent]) – Drops the named script from the Oracle Database Python script repository
50.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Datastore functions for saving Python objects in ODB • oml.ds.save(objs, name[, description, . . . ]) – Saves Python objects to a datastore in the user’s Oracle Database schema • oml.ds.dir([name, regex_match, dstype]) – Lists existing datastores available to the current session user • oml.ds.describe(name[, owner]) – Describes the contents of the named datastore available to the current session user • oml.ds.load(name[, objs, owner, to_globals]) – Loads Python objects from a datastore in the user’s Oracle Database schema • oml.ds.delete(name[, objs, regex_match]) – Deletes one or more datastores from the user’s Oracle Database schema or deletes specific objects to delete from within a datastore
51.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Data Types Mapping between OML4Py and Oracle Database cx_Oracle Read Python cx_Oracle Write varchar2, char, clob str varchar2, char, clob number, binary_double, binary_float float if oranumber == True then number (default) else binary_double boolean if oranumber == True then number (default) else binary_double raw, blob bytes raw, blob 51
52.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | AutoML – new with OML4Py in Oracle Advanced Analytics • Goal: increase model quality and data scientist productivity while reducing overall compute time • Auto Feature Selection – Reduce the number of features by identifying most relevant – Improve performance and accuracy • Auto Model Selection for classification and regression – Identify best algorithm to achieve maximum score – Find best model many times faster than with exhaustive search techniques • Auto Tuning of Hyper-parameters – Significantly improve model accuracy – Avoid manual or exhaustive search techniques 52
53.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Auto Feature Selection: Motivation & Example Confidential – Oracle Internal/Restricted/Highly Restricted 53 • Many real-world datasets have a large number of irrelevant features • Slows down training • Goal: Speed-up ML pipeline by selecting most relevant features 0 5 10 15 20 25 30 1 2 Trainingtime(seconds) ML training time 0.93 0.94 0.95 0.96 0.97 0.98 0.99 1 1 2 Accuracy Prediction Accuracy 33x +4% OpenML dataset 312 with 1925 rowsOpenML dataset 40996 (56000 rows, 784 columns) Using SVM Gaussian with Auto Feature Selection • Features reduced from 784 to 309 • Accuracy improves from 65.9% to 84.3% • Training time reduced 1.3x
54.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Auto Feature Selection: Evaluation for OAA SVM Gaussian Confidential – Oracle Internal/Restricted/Highly Restricted 54 • 150 Datasets with more than 500 cases 0.5 0.55 0.6 0.65 0.7 0.75 0.8 0.85 0.9 0.95 1 1 2 3 4 5 6 7 8 9 10 Accuracy Series1 Series2 Avg Accuracy Gain 2.5% Avg Feature Reduction 52%
55.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Auto Feature Selection Example fs = FeatureSelection(mining_function = 'classification', score_metric = 'accuracy') selected_features = fs.reduce('dt', X_train, y_train) X_train = X_train[:,selected_features] 55Confidential – Oracle Internal/Restricted/Highly Restricted
56.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Auto Model Selection Example ms = ModelSelection(mining_function = 'classification', score_metric = 'accuracy') best_model = ms.select(X_train, y_train) y_pred = best_model.predict(X_test) 56Confidential – Oracle Internal/Restricted/Highly Restricted
57.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Auto Tune Example at = Autotune(mining_function = 'classification', score_metric = 'accuracy') evals = at.tune('dt', X_train, y_train) mod = evals['best_model'] y_pred = mod.predict(X_test) 57Confidential – Oracle Internal/Restricted/Highly Restricted
58.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | OML4Py - Deployment Architecture Oracle Confidential – Internal/Restricted/Highly Restricted 58 Oracle Database Python 3 engine OAA / OML4Py Zeppelin / Jupyter web interface BDA / Hadoop Big Data SQL Web browser Web browser OML4Py Client Python Engine Python Script Repository Python Object Datastore Oracle Analytics Cloud Oracle Data Visualization Desktop OBIEE
59.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. | Summary - Oracle Machine Learning for Python • Oracle Database enabled with Python scripting language and environment for the enterprise via Oracle Advanced Analytics option • Oracle’s Python technologies extend Python for enterprise use – Supports data analysis, exploration, and machine learning – Enables streamlined production development – Automates key data science steps for greater data scientist productivity, while enhancing accuracy and performance • Achieve performance and scalability leveraging Oracle Database as a high performance compute engine 59
60.
Copyright © 2018,
Oracle and/or its affiliates. All rights reserved. |
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