Bring your code to explore the Azure Data Lake: Execute your .NET/Python/R code at scale with U-SQL (SQLBits and SQLKonferenz 2018)
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The document discusses U-SQL, a data processing language that allows for running Python, R, and .NET code at scale in Azure Data Lake. It highlights the framework's extensibility, custom code scalability, and its applicability in various big data use cases like digital crime analysis and shopping recommendations. U-SQL offers a balanced approach to declarative and imperative coding, enabling users to leverage their existing code and expertise across different programming languages.
![REFERENCE ASSEMBLY ImageCommon;
REFERENCE ASSEMBLY FaceSdk;
REFERENCE ASSEMBLY ImageEmotion;
REFERENCE ASSEMBLY ImageTagging;
REFERENCE ASSEMBLY ImageOcr;
@imgs =
EXTRACT FileName string, ImgData byte[]
FROM @"/images/{FileName}.jpg"
USING new Cognition.Vision.ImageExtractor();
// Extract the number of objects on each image and tag them
@objects =
PROCESS @imgs
PRODUCE FileName,
NumObjects int,
Tags SqlMap<string, float?>
READONLY FileName
USING new Cognition.Vision.ImageTagger();
OUTPUT @objects
TO "/objects.tsv"
USING Outputters.Tsv();
Imaging](https://image.slidesharecdn.com/pythonrdotnetinusql-180228135441/85/Bring-your-code-to-explore-the-Azure-Data-Lake-Execute-your-NET-Python-R-code-at-scale-with-U-SQL-SQLBits-and-SQLKonferenz-2018-9-320.jpg)
![REFERENCE ASSEMBLY [TextSentiment];
REFERENCE ASSEMBLY [TextKeyPhrase];
@WarAndPeace =
EXTRACT No int,
Year string,
Book string, Chapter string,
Text string
FROM @"/usqlext/samples/cognition/war_and_peace.csv"
USING Extractors.Csv();
@sentiment =
PROCESS @WarAndPeace
PRODUCE No,
Year,
Book, Chapter,
Text,
Sentiment string,
Conf double
USING new Cognition.Text.SentimentAnalyzer(true);
OUTPUT @sentinment
TO "/sentiment.tsv"
USING Outputters.Tsv();
Text Analysis](https://image.slidesharecdn.com/pythonrdotnetinusql-180228135441/85/Bring-your-code-to-explore-the-Azure-Data-Lake-Execute-your-NET-Python-R-code-at-scale-with-U-SQL-SQLBits-and-SQLKonferenz-2018-10-320.jpg)
![[SqlUserDefinedExtractor]
public class DriverExtractor : IExtractor
{
private byte[] _row_delim;
private string _col_delim;
private Encoding _encoding;
// Define a non-default constructor since I want to pass in my own parameters
public DriverExtractor( string row_delim = "rn", string col_delim = ",“
, Encoding encoding = null )
{
_encoding = encoding == null ? Encoding.UTF8 : encoding;
_row_delim = _encoding.GetBytes(row_delim);
_col_delim = col_delim;
} // DriverExtractor
// Converting text to target schema
private void OutputValueAtCol_I(string c, int i, IUpdatableRow outputrow)
{
var schema = outputrow.Schema;
if (schema[i].Type == typeof(int))
{
var tmp = Convert.ToInt32(c);
outputrow.Set(i, tmp);
}
...
} //SerializeCol
public override IEnumerable<IRow> Extract( IUnstructuredReader input
, IUpdatableRow outputrow)
{
foreach (var row in input.Split(_row_delim))
{
using(var s = new StreamReader(row, _encoding))
{
int i = 0;
foreach (var c in s.ReadToEnd().Split(new[] { _col_delim }, StringSplitOptions.None))
{
OutputValueAtCol_I(c, i++, outputrow);
} // foreach
} // using
yield return outputrow.AsReadOnly();
} // foreach
} // Extract
} // class DriverExtractor
UDO model
• Marking UDOs
• Parameterizing UDOs
• UDO signature
• UDO-specific processing
pattern
• Rowsets and their schemas
in UDOs
• Setting results
• By position
• By name](https://image.slidesharecdn.com/pythonrdotnetinusql-180228135441/85/Bring-your-code-to-explore-the-Azure-Data-Lake-Execute-your-NET-Python-R-code-at-scale-with-U-SQL-SQLBits-and-SQLKonferenz-2018-18-320.jpg)
![Managing Assemblies
• Create assemblies
• Reference assemblies
• Enumerate assemblies
• Drop assemblies
• VisualStudio makes registration easy!
• CREATE ASSEMBLY db.assembly FROM @path;
• CREATE ASSEMBLY db.assembly FROM byte[];
• Can also include additional resource files
• REFERENCE ASSEMBLY db.assembly;
• Referencing .Net Framework Assemblies
• Always accessible system namespaces:
• U-SQL specific (e.g., for SQL.MAP)
• All provided by system.dll system.core.dll system.data.dll,
System.Runtime.Serialization.dll, mscorelib.dll (e.g.,
System.Text, System.Text.RegularExpressions,
System.Linq)
• Add all other .Net Framework Assemblies with:
REFERENCE SYSTEM ASSEMBLY [System.XML];
• Enumerating Assemblies
• Powershell command
• U-SQL Studio Server Explorer and Azure Portal
• DROP ASSEMBLY db.assembly;](https://image.slidesharecdn.com/pythonrdotnetinusql-180228135441/85/Bring-your-code-to-explore-the-Azure-Data-Lake-Execute-your-NET-Python-R-code-at-scale-with-U-SQL-SQLBits-and-SQLKonferenz-2018-19-320.jpg)
![REFERENCE ASSEMBLY [ExtPython];
DECLARE @myScript = @"
def get_mentions(tweet):
return ';'.join( ( w[1:] for w in tweet.split() if w[0]=='@' ) )
def usqlml_main(df):
del df['time']
del df['author']
df['mentions'] = df.tweet.apply(get_mentions)
del df['tweet']
return df
";
@t =
SELECT * FROM
(VALUES
("D1","T1","A1","@foo Hello World @bar"),
("D2","T2","A2","@baz Hello World @beer")
) AS D( date, time, author, tweet );
@m =
REDUCE @t ON date
PRODUCE date string, mentions string
USING new Extension.Python.Reducer(pyScript:@myScript);
Use U-SQL to create a massively
distributed program.
Executing Python code across
many nodes.
Using standard libraries such as
numpy and pandas.
Documentation:
https://docs.microsoft.com/en-
us/azure/data-lake-analytics/data-
lake-analytics-u-sql-python-
extensions
Python
Extensions](https://image.slidesharecdn.com/pythonrdotnetinusql-180228135441/85/Bring-your-code-to-explore-the-Azure-Data-Lake-Execute-your-NET-Python-R-code-at-scale-with-U-SQL-SQLBits-and-SQLKonferenz-2018-23-320.jpg)
![R running in U-
SQL
Generate a linear model
SampleScript_LM_Iris.R
REFERENCE ASSEMBLY [ExtR];
DECLARE @IrisData string = @"/usqlext/samples/R/iris.csv";
DECLARE @OutputFileModelSummary string =
@"/my/R/Output/LMModelSummaryCoefficientsIrisFromRCommand.txt";
DECLARE @myRScript = @"
inputFromUSQL$Species = as.factor(inputFromUSQL$Species)
lm.fit=lm(unclass(Species)~.-Par, data=inputFromUSQL)
#do not return readonly columns and make sure that the column names are
the same in usql and r scripts,
outputToUSQL=data.frame(summary(lm.fit)$coefficients)
colnames(outputToUSQL) <- c(""Estimate"", ""StdError"", ""tValue"",
""Pr"")
outputToUSQL";
@InputData =
EXTRACT SepalLength double, SepalWidth double, PetalLength double,
PetalWidth double, Species string
FROM @IrisData
USING Extractors.Csv();
@ExtendedData = SELECT 0 AS Par, * FROM @InputData;
@ModelCoefficients = REDUCE @ExtendedData ON Par
PRODUCE Par, Estimate double, StdError double, tValue double, Pr double
READONLY Par
USING new Extension.R.Reducer(command:@myRScript,
rReturnType:"dataframe");
OUTPUT @ModelCoefficients TO @OutputFileModelSummary USING Outputters.Tsv();](https://image.slidesharecdn.com/pythonrdotnetinusql-180228135441/85/Bring-your-code-to-explore-the-Azure-Data-Lake-Execute-your-NET-Python-R-code-at-scale-with-U-SQL-SQLBits-and-SQLKonferenz-2018-27-320.jpg)
Bring your code to explore the Azure Data Lake: Execute your .NET/Python/R code at scale with U-SQL (SQLBits and SQLKonferenz 2018)
- 1. Run Python, R and .NET code at Data Lake scale with U-SQL in Azure Data Lake Michael Rys Principal Program Manager Big Data Team, Microsoft @MikeDoesBigData usql@microsoft.com
- 2. Agenda • Characteristics of Big Data Analytics Programming • Scaling out existing code with U-SQL: • Scaling out Cognitive Libraries • Introduction to U-SQL’s Extensibility Framework • Scaling out .NET with U-SQL: • Custom Image processing • Scaling out Python with U-SQL • Scaling out R with U-SQL: • Model generation, Model testing and scoring
- 3. Some sample use cases Digital Crime Unit – Analyze complex attack patterns to understand BotNets and to predict and mitigate future attacks by analyzing log records with complex custom algorithms Image Processing – Large-scale image feature extraction and classification using custom code Shopping Recommendation – Complex pattern analysis and prediction over shopping records using proprietary algorithms Characteristics of Big Data Analytics • Requires processing of any type of data • Allow use of custom algorithms • Scale to any size and be efficient Bring your own coding expertise and existing code and scale it out?
- 4. Status Quo: SQL for Big Data Declarativity does scaling and parallelization for you Extensibility is bolted on and not “native” hard to work with anything other than structured data difficult to extend with custom code: complex installations and frameworks Limited to one or two languages
- 5. Status Quo: Programming Languages for Big Data Extensibility through custom code is “native” Declarativity is bolted on and not “native” User often has to care about scale and performance SQL is 2nd class within string, only local optimizations Often no code reuse/ sharing across queries
- 6. Why U-SQL? Declarativity and Extensibility are equally native! Get benefits of both! Scales out your custom imperative Code (written in .NET, Python, R, and more to come) in a declarative SQL-based framework R Python .NET U-SQL Framework
- 7. Extract Process Output User CodeUser Code User Code User Code Declarative Framework User Extensions U-SQL Example Extract User Code User Code
- 8. Scale Out Cognitive Library https://github.com/Azure/usql/tree/master/Examples/ImageApp https://docs.microsoft.com/en-us/azure/data-lake-analytics/data-lake-analytics-u-sql-cognitive Car Green Parked Outdoor Racing
- 9. REFERENCE ASSEMBLY ImageCommon; REFERENCE ASSEMBLY FaceSdk; REFERENCE ASSEMBLY ImageEmotion; REFERENCE ASSEMBLY ImageTagging; REFERENCE ASSEMBLY ImageOcr; @imgs = EXTRACT FileName string, ImgData byte[] FROM @"/images/{FileName}.jpg" USING new Cognition.Vision.ImageExtractor(); // Extract the number of objects on each image and tag them @objects = PROCESS @imgs PRODUCE FileName, NumObjects int, Tags SqlMap<string, float?> READONLY FileName USING new Cognition.Vision.ImageTagger(); OUTPUT @objects TO "/objects.tsv" USING Outputters.Tsv(); Imaging
- 10. REFERENCE ASSEMBLY [TextSentiment]; REFERENCE ASSEMBLY [TextKeyPhrase]; @WarAndPeace = EXTRACT No int, Year string, Book string, Chapter string, Text string FROM @"/usqlext/samples/cognition/war_and_peace.csv" USING Extractors.Csv(); @sentiment = PROCESS @WarAndPeace PRODUCE No, Year, Book, Chapter, Text, Sentiment string, Conf double USING new Cognition.Text.SentimentAnalyzer(true); OUTPUT @sentinment TO "/sentiment.tsv" USING Outputters.Tsv(); Text Analysis
- 11. U-SQL/Cognitive Example • Identify objects in images (tags) • Identify faces and emotions and images • Join datasets – find out which tags are associated with happiness REFERENCE ASSEMBLY ImageCommon; REFERENCE ASSEMBLY FaceSdk; REFERENCE ASSEMBLY ImageEmotion; REFERENCE ASSEMBLY ImageTagging; @objects = PROCESS MegaFaceView PRODUCE FileName, NumObjects int, Tags SqlMap<string,float?> READONLY FileName USING new Cognition.Vision.ImageTagger(); @tags = SELECT FileName, T.Tag FROM @objects CROSS APPLY EXPLODE(Tags.Split) AS T(Tag, Conf) WHERE Tag.Contains("dog") OR Tag.Contains("cat"); @emotion = SELECT ImageName, Details.Emotion FROM MegaFaceView CROSS APPLY new Cognition.Vision.EmotionApplier(imgCol:"image") AS Details(NumFaces int, FaceIndex int, RectX float, RectY float, Width float, Height float, Emotion string, Confidence float); @correlation = SELECT T.FileName, Emotion, Tag FROM @emotion AS E INNER JOIN @tags AS T ON E.FileName == T.FileName; Images Objects Emotions filter join aggregate
- 12. U-SQL extensibility Extend U-SQL with C#/.NET, Python, R etc. Built-in operators, function, aggregates C# expressions (in SELECT expressions) User-defined aggregates (UDAGGs) User-defined functions (UDFs) User-defined operators (UDOs)
- 13. What are UDOs? • User-Defined Extractors • Converts files into rowset • User-Defined Outputters • Converts rowset into files • User-Defined Processors • Take one row and produce one row • Pass-through versus transforming • User-Defined Appliers • Take one row and produce 0 to n rows • Used with OUTER/CROSS APPLY • User-Defined Combiners • Combines rowsets (like a user-defined join) • User-Defined Reducers • Take n rows and produce m rows (normally m<n) • Scaled out with explicit U-SQL Syntax that takes a UDO instance (created as part of the execution): • EXTRACT • OUTPUT • CROSS APPLY Custom Operator Extensions in language of your choice Scaled out by U-SQL • PROCESS • COMBINE • REDUCE
- 14. Scaling out C# with U-SQL https://github.com/Azure/usql/tree/master/Examples/ImageApp Copyright Camera Make Camera Model Thumbnail Michael Canon 70D Michael Samsung S7
- 15. How to specify .NET UDOs? • .Net API provided to build UDOs • Any .Net language usable • however only C# is first-class in tooling • Use U-SQL specific .Net DLLs • Deploying UDOs • Compile DLL • Upload DLL to ADLS • register with U-SQL script • VisualStudio provides tool support • UDOs can • Invoke managed code • Invoke native code deployed with UDO assemblies • Invoke other language runtimes (e.g., Python, R) • be scaled out by U-SQL execution framework • UDOs cannot • Communicate between different UDO invocations • Call Webservices or Reach outside the vertex boundary
- 16. How to specify UDOs? • Code behind • C#, Python, R
- 17. • C# Class Project for U-SQL How to specify UDOs?
- 18. [SqlUserDefinedExtractor] public class DriverExtractor : IExtractor { private byte[] _row_delim; private string _col_delim; private Encoding _encoding; // Define a non-default constructor since I want to pass in my own parameters public DriverExtractor( string row_delim = "rn", string col_delim = ",“ , Encoding encoding = null ) { _encoding = encoding == null ? Encoding.UTF8 : encoding; _row_delim = _encoding.GetBytes(row_delim); _col_delim = col_delim; } // DriverExtractor // Converting text to target schema private void OutputValueAtCol_I(string c, int i, IUpdatableRow outputrow) { var schema = outputrow.Schema; if (schema[i].Type == typeof(int)) { var tmp = Convert.ToInt32(c); outputrow.Set(i, tmp); } ... } //SerializeCol public override IEnumerable<IRow> Extract( IUnstructuredReader input , IUpdatableRow outputrow) { foreach (var row in input.Split(_row_delim)) { using(var s = new StreamReader(row, _encoding)) { int i = 0; foreach (var c in s.ReadToEnd().Split(new[] { _col_delim }, StringSplitOptions.None)) { OutputValueAtCol_I(c, i++, outputrow); } // foreach } // using yield return outputrow.AsReadOnly(); } // foreach } // Extract } // class DriverExtractor UDO model • Marking UDOs • Parameterizing UDOs • UDO signature • UDO-specific processing pattern • Rowsets and their schemas in UDOs • Setting results • By position • By name
- 19. Managing Assemblies • Create assemblies • Reference assemblies • Enumerate assemblies • Drop assemblies • VisualStudio makes registration easy! • CREATE ASSEMBLY db.assembly FROM @path; • CREATE ASSEMBLY db.assembly FROM byte[]; • Can also include additional resource files • REFERENCE ASSEMBLY db.assembly; • Referencing .Net Framework Assemblies • Always accessible system namespaces: • U-SQL specific (e.g., for SQL.MAP) • All provided by system.dll system.core.dll system.data.dll, System.Runtime.Serialization.dll, mscorelib.dll (e.g., System.Text, System.Text.RegularExpressions, System.Linq) • Add all other .Net Framework Assemblies with: REFERENCE SYSTEM ASSEMBLY [System.XML]; • Enumerating Assemblies • Powershell command • U-SQL Studio Server Explorer and Azure Portal • DROP ASSEMBLY db.assembly;
- 20. DEPLOY RESOURCE Syntax: 'DEPLOY' 'RESOURCE' file_path_URI { ',' file_path_URI }. Example: DEPLOY RESOURCE "/config/configfile.xml", "package.zip"; Use Cases: • Script specific configuration files (not stored with Asm) • Script specific models • Any other file you want to access from user code on all vertices Semantics: • Files have to be in ADLS or WASB • Files are deployed to vertex and are accessible from any custom code Limits: • Single resource file limit is 400MB • Overall limit for deployed resource files is 3GB
- 21. U-SQL Vertex Code (.NET) C# C++ Algebra Additional non-dll files & Deployed resources managed dll native dll Compilation output (in job folder) Compilation and Optimization U-SQL Metadata Service Deployed to Vertices REFERENCE ASSEMBLY ADLS DEPLOY RESOURCE System files (built-in Runtimes, Core DLLs, OS)
- 22. Scale Out Python With U-SQL Python Author Tweet MikeDoesBigData @AzureDataLake: Come and see the #SQLKonferenz sessions on #USQL AzureDataLake What are your recommendations for #SQLKonferenz? @MikeDoesBigData Author Mentions Topics MikeDoesBigData {@AzureDataLake} {#SQLKonferenz, #USQL} AzureDataLake {@MikeDoesBigData} {#SQLKonferenz}
- 23. REFERENCE ASSEMBLY [ExtPython]; DECLARE @myScript = @" def get_mentions(tweet): return ';'.join( ( w[1:] for w in tweet.split() if w[0]=='@' ) ) def usqlml_main(df): del df['time'] del df['author'] df['mentions'] = df.tweet.apply(get_mentions) del df['tweet'] return df "; @t = SELECT * FROM (VALUES ("D1","T1","A1","@foo Hello World @bar"), ("D2","T2","A2","@baz Hello World @beer") ) AS D( date, time, author, tweet ); @m = REDUCE @t ON date PRODUCE date string, mentions string USING new Extension.Python.Reducer(pyScript:@myScript); Use U-SQL to create a massively distributed program. Executing Python code across many nodes. Using standard libraries such as numpy and pandas. Documentation: https://docs.microsoft.com/en- us/azure/data-lake-analytics/data- lake-analytics-u-sql-python- extensions Python Extensions
- 24. U-SQL Vertex Code (Python) C# C++ Algebra Additional Python Libs and Script managed dll native dll Compilation output (in job folder) Compilation and Optimization U-SQL Metadata Service Deployed to Vertices REFERENCE ASSEMBLY ExtPython ADLS DEPLOY RESOURCE Script.py OtherLibs.zip System files (built-in Runtimes, Core DLLs, OS) Python Python Engine & Libs
- 25. Python (and R) Extension Execution Paradigm Python/R.Reducer (type mapping) Python/R.Reducer (type mapping)
- 26. Scale Out R With U-SQL
- 27. R running in U- SQL Generate a linear model SampleScript_LM_Iris.R REFERENCE ASSEMBLY [ExtR]; DECLARE @IrisData string = @"/usqlext/samples/R/iris.csv"; DECLARE @OutputFileModelSummary string = @"/my/R/Output/LMModelSummaryCoefficientsIrisFromRCommand.txt"; DECLARE @myRScript = @" inputFromUSQL$Species = as.factor(inputFromUSQL$Species) lm.fit=lm(unclass(Species)~.-Par, data=inputFromUSQL) #do not return readonly columns and make sure that the column names are the same in usql and r scripts, outputToUSQL=data.frame(summary(lm.fit)$coefficients) colnames(outputToUSQL) <- c(""Estimate"", ""StdError"", ""tValue"", ""Pr"") outputToUSQL"; @InputData = EXTRACT SepalLength double, SepalWidth double, PetalLength double, PetalWidth double, Species string FROM @IrisData USING Extractors.Csv(); @ExtendedData = SELECT 0 AS Par, * FROM @InputData; @ModelCoefficients = REDUCE @ExtendedData ON Par PRODUCE Par, Estimate double, StdError double, tValue double, Pr double READONLY Par USING new Extension.R.Reducer(command:@myRScript, rReturnType:"dataframe"); OUTPUT @ModelCoefficients TO @OutputFileModelSummary USING Outputters.Tsv();
- 28. R running in U- SQL Use a previously generated model REFERENCE ASSEMBLY master.ExtR; DEPLOY RESOURCE @"/usqlext/samples/R/my_model_LM_Iris.rda"; // Prediction Model DECLARE @IrisData string = @"/usqlext/samples/R/iris.csv"; DECLARE @OutputFilePredictions string = @"/Output/LMPredictionsIris.csv"; DECLARE @PartitionCount int = 10; // R script to run DECLARE @myRScript = @" load(""my_model_LM_Iris.rda"") outputToUSQL=data.frame(predict(lm.fit, inputFromUSQL, interval=""confidence""))"; @InputData = EXTRACT SepalLength double, SepalWidth double, PetalLength double, PetalWidth double, Species string FROM @IrisData USING Extractors.Csv(); //Randomly partition the data to apply the model in parallel @ExtendedData = SELECT Extension.R.RandomNumberGenerator.GetRandomNumber(@PartitionCount) AS Par, * FROM @InputData; // Predict Species @RScriptOutput = REDUCE @ExtendedData ON Par PRODUCE Par, fit double, lwr double, upr double READONLY Par USING new Extension.R.Reducer(command:@myRScript, rReturnType:"dataframe", stringsAsFactors:false); OUTPUT @RScriptOutput TO @OutputFilePredictions USING Outputters.Csv(outputHeader:true);
- 29. U-SQL Vertex Code (R) C# C++ Algebra Additional R Libs and Script managed dll native dll Compilation output (in job folder) Compilation and Optimization U-SQL Metadata Service Deployed to Vertices REFERENCE ASSEMBLY ExtR ADLS DEPLOY RESOURCE Script.R OtherLibs.zip System files (built-in Runtimes, Core DLLs, OS) R R Engine & Libs
- 30. Summary
- 31. Scaling Out your Code and Language with U-SQL Bring your Code or Write your Custom Operator Extensions in .Net (C#, F#, etc) Python R … Scaled out by U-SQL
- 32. Additional Resources • Blogs and community page: • http://usql.io (U-SQL Github) • http://blogs.msdn.microsoft.com/azuredatalake/ • http://blogs.msdn.microsoft.com/mrys/ • https://channel9.msdn.com/Search?term=U-SQL#ch9Search • Documentation, presentations and articles: • http://aka.ms/usql_reference • https://docs.microsoft.com/en-us/azure/data-lake-analytics/data-lake-analytics-u-sql- programmability-guide • https://docs.microsoft.com/en-us/azure/data-lake-analytics/ • https://msdn.microsoft.com/en-us/magazine/mt614251 • https://msdn.microsoft.com/magazine/mt790200 • http://www.slideshare.net/MichaelRys • Getting Started with R in U-SQL • https://docs.microsoft.com/en-us/azure/data-lake-analytics/data-lake-analytics-u-sql-python- extensions • ADL forums and feedback • https://social.msdn.microsoft.com/Forums/azure/en-US/home?forum=AzureDataLake • http://stackoverflow.com/questions/tagged/u-sql • http://aka.ms/adlfeedback Continue your education at Microsoft Virtual Academy online.
- 33. Vielen Dank für Eure Aufmerksamkeit! usql@microsoft.com@MikeDoesBigData http://aka.ms/azuredatalake
Editor's Notes
- #4: Add velocity?
- #5: Hard to operate on unstructured data: Even Hive requires meta data to be created to operate on unstructured data. Adding Custom Java functions, aggregators and SerDes is involving a lot of steps and often access to server’s head node and differs based on type of operation. Requires many tools and steps. Some examples: Hive UDAgg Code and compile .java into .jar Extend AbstractGenericUDAFResolver class: Does type checking, argument checking and overloading Extend GenericUDAFEvaluator class: implements logic in 8 methods. - Deploy: Deploy jar into class path on server Edit FunctionRegistry.java to register as built-in Update the content of show functions with ant Hive UDF (as of v0.13) Code Load JAR into head node or at URI CREATE FUNCTION USING JAR to register and load jar into classpath for every function (instead of registering jar and just use the functions)
- #6: Spark supports Custom “inputters and outputters” for defining custom RDDs No UDAGGs Simple integration of UDFs but only for duration of program. No reuse/sharing. Cloud dataflow? Requires has to care about scale and perf Spark UDAgg Is not yet supported ( SPARK-3947) Spark UDF Write inline function def westernState(state: String) = Seq("CA", "OR", "WA", "AK").contains(state) for SQL usage need to register the table customerTable.registerTempTable("customerTable") Register each UDF sqlContext.udf.register("westernState", westernState _) Call it val westernStates = sqlContext.sql("SELECT * FROM customerTable WHERE westernState(state)")
- #7: Makes it easy for you by unifying: Declarative and imperative Unstructured and structured data processing Local and remote Queries Increase productivity and agility from Day 1 and at Day 100 for YOU!
- #8: ADL uses U-SQL to create a distributed, parallel job using simple declarative statements and provides discrete points for attaching user code
- #9: U-SQL is build on top of existing frameworks and languages
- #14: Extensions require .NET assemblies to be registered with a database