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0 parents commit 54fcf8a467a05cf00b5508aad392999186ecd049 @jwills jwills committed Nov 12, 2013
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@@ -0,0 +1,72 @@
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@@ -0,0 +1,37 @@
+Gertrude: A Multilayer and Multivariate Experiment Framework for the JVM
+Gertrude is a Java implementation of the overlapping experiments infrastructure used at
+Google and first described in [Tang et al. (2010)](
+It is designed to be powerful enough to support the types of experiments that data scientists,
+machine learning researchers, and software engineers need to run when developing _data products_
+(e.g., recommendation engines, search ranking algorithms, and large-scale classifiers), although
+it can also be used for testing new features and UI treatments.
+The core of Gertrude is a Java library that allows developers to add _experiment flags_ to their
+code to control the value of certain scalar parameters (booleans, ints, doubles, and strings) and
+an external _configuration file_ that defines rules for setting the values of experiment flags on
+every request to the server based on attributes of the request (such as a user's cookie or anonymous
+login id.)
+Gertrude has minimal dependencies and is intended to be used as a component library for production
+servers. The components of the framework are:
+* **core**: Core API definitions and experiment diversion logic
+* **avro**: Support for serializing experiment configurations as Apache Avro records
+* **curator**: Support for loading experiment configurations via Apache Curator, a library of
+patterns for Apache Zookeeper
+* **file**: Support for loading experiment configurations from a file that is monitored for changes
+* **server**: Example code for creating core experiment classes and configuring them for use with
+a Java server, a good place to start to see how the framework is used
+* **deploy**: Simple commandline tool for parsing an experiment configuration from a JSON or
+[HOCON]( file, serializing it as an Avro object, and then
+deploying the serialized object to a Zookeeper node or file.
+Gertrude is alpha code and is under active development, and we welcome new contributors. We will
+be co-developing Gertrude with [Oryx](, but Gertrude will remain
+a stand-alone library.
+Gertrude is named for [Gertrude Cox](, the founder of
+the department of Experimental Statistics at North Carolina State University and co-author of one of the classic texts
+in the field, [Experimental Designs](
@@ -0,0 +1,77 @@
+<?xml version="1.0" encoding="UTF-8"?>
+ Copyright (c) 2013, Cloudera, Inc. All Rights Reserved.
+ Cloudera, Inc. licenses this file to you under the Apache License,
+ Version 2.0 (the "License"). You may not use this file except in
+ compliance with the License. You may obtain a copy of the License at
+ This software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ CONDITIONS OF ANY KIND, either express or implied. See the License for
+ the specific language governing permissions and limitations under the
+ License.
+ -->
+<project xmlns="" xmlns:xsi=""
+ xsi:schemaLocation="">
+ <modelVersion>4.0.0</modelVersion>
+ <parent>
+ <groupId>com.cloudera.gertrude</groupId>
+ <artifactId>gertrude-parent</artifactId>
+ <version>0.1.0</version>
+ <relativePath>../</relativePath>
+ </parent>
+ <artifactId>gertrude-avro</artifactId>
+ <name>Gertrude Experiment Framework Avro Support</name>
+ <dependencies>
+ <dependency>
+ <groupId>com.cloudera.gertrude</groupId>
+ <artifactId>gertrude-core</artifactId>
+ </dependency>
+ <dependency>
+ <groupId></groupId>
+ <artifactId>guava</artifactId>
+ </dependency>
+ <dependency>
+ <groupId>org.apache.avro</groupId>
+ <artifactId>avro</artifactId>
+ </dependency>
+ <dependency>
+ <groupId>com.cloudera.gertrude</groupId>
+ <artifactId>gertrude-core</artifactId>
+ <type>test-jar</type>
+ <scope>test</scope>
+ </dependency>
+ <dependency>
+ <groupId>junit</groupId>
+ <artifactId>junit</artifactId>
+ <scope>test</scope>
+ </dependency>
+ </dependencies>
+ <build>
+ <plugins>
+ <plugin>
+ <groupId>org.apache.maven.plugins</groupId>
+ <artifactId>maven-compiler-plugin</artifactId>
+ </plugin>
+ <plugin>
+ <groupId>org.apache.avro</groupId>
+ <artifactId>avro-maven-plugin</artifactId>
+ </plugin>
+ <plugin>
+ <groupId>org.apache.maven.plugins</groupId>
+ <artifactId>maven-surefire-plugin</artifactId>
+ </plugin>
+ </plugins>
+ </build>
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