发布于 2015-09-09 10:23:39 | 419 次阅读 | 评论: 0 | 来源: 网友投递

这里有新鲜出炉的精品教程，程序狗速度看过来！

Apache Spark

Spark是UC Berkeley AMP lab所开源的类Hadoop MapReduce的通用的并行，Spark，拥有Hadoop MapReduce所具有的优点；但不同于MapReduce的是Job中间输出结果可以保存在内存中，从而不再需要读写HDFS，因此Spark能更好地适用于数据挖掘与机器学习等需要迭代的map reduce的算法。

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Spark 1.5.0 是 1.x 系列的第六个版本，包括 230+ 贡献者的努力。值得关注的改进如下：

• APIs：RDD, DataFrame 和 SQL

• 后端执行：DataFrame 和 SQL

• 集成：数据源，Hive, Hadoop, Mesos 和集群管理

• R 语言

• 机器学习和高级分析

• Spark Streaming

• Deprecations, Removals, Configs 和 Behavior 改进

  • Spark Core

  • Spark SQL & DataFrames

  • Spark Streaming

  • MLlib

• 已知问题解决

  • SQL/DataFrame

  • Streaming

• Credits

下载：spark-1.5.0.tgz

详细改进请看发行说明和更新日志。

新特性列表：

• [SPARK-1855] - Provide memory-and-local-disk RDD checkpointing

• [SPARK-4176] - Support decimals with precision > 18 in Parquet

• [SPARK-4751] - Support dynamic allocation for standalone mode

• [SPARK-4752] - Classifier based on artificial neural network

• [SPARK-5133] - Feature Importance for Random Forests

• [SPARK-5155] - Python API for MQTT streaming

• [SPARK-5962] - [MLLIB] Python support for Power Iteration Clustering

• [SPARK-6129] - Create MLlib metrics user guide with algorithm definitions and complete code examples.

• [SPARK-6390] - Add MatrixUDT in PySpark

• [SPARK-6487] - Add sequential pattern mining algorithm PrefixSpan to Spark MLlib

• [SPARK-6813] - SparkR style guide

• [SPARK-6820] - Convert NAs to null type in SparkR DataFrames

• [SPARK-6833] - Extend `addPackage` so that any given R file can be sourced in the worker before functions are run.

• [SPARK-6964] - Support Cancellation in the Thrift Server

• [SPARK-7083] - Binary processing dimensional join

• [SPARK-7254] - Extend PIC to handle Graphs directly

• [SPARK-7293] - Report memory used in aggregations and joins

• [SPARK-7368] - add QR decomposition for RowMatrix

• [SPARK-7387] - CrossValidator example code in Python

• [SPARK-7422] - Add argmax to Vector, SparseVector

• [SPARK-7440] - Remove physical Distinct operator in favor of Aggregate

• [SPARK-7547] - Example code for ElasticNet

• [SPARK-7604] - Python API for PCA and PCAModel

• [SPARK-7605] - Python API for ElementwiseProduct

• [SPARK-7639] - Add Python API for Statistics.kernelDensity

• [SPARK-7690] - MulticlassClassificationEvaluator for tuning Multiclass Classifiers

• [SPARK-7879] - KMeans API for spark.ml Pipelines

• [SPARK-7888] - Be able to disable intercept in Linear Regression in ML package

• [SPARK-7988] - Mechanism to control receiver scheduling

• [SPARK-8019] - [SparkR] Create worker R processes with a command other then Rscript

• [SPARK-8124] - Created more examples on SparkR DataFrames

• [SPARK-8129] - Securely pass auth secrets to executors in standalone cluster mode

• [SPARK-8169] - Add StopWordsRemover as a transformer

• [SPARK-8302] - Support heterogeneous cluster nodes on YARN

• [SPARK-8313] - Support Spark Packages containing R code with --packages

• [SPARK-8344] - Add internal metrics / logging for DAGScheduler to detect long pauses / blocking

• [SPARK-8348] - Add in operator to DataFrame Column

• [SPARK-8364] - Add crosstab to SparkR DataFrames

• [SPARK-8431] - Add in operator to DataFrame Column in SparkR

• [SPARK-8446] - Add helper functions for testing physical SparkPlan operators

• [SPARK-8456] - Python API for N-Gram Feature Transformer

• [SPARK-8479] - Add numNonzeros and numActives to linalg.Matrices

• [SPARK-8484] - Add TrainValidationSplit to ml.tuning

• [SPARK-8522] - Disable feature scaling in Linear and Logistic Regression

• [SPARK-8538] - LinearRegressionResults class for storing LR results on data

• [SPARK-8539] - LinearRegressionSummary class for storing LR training stats

• [SPARK-8551] - Python example code for elastic net

• [SPARK-8564] - Add the Python API for Kinesis

• [SPARK-8579] - Support arbitrary object in UnsafeRow

• [SPARK-8598] - Implementation of 1-sample, two-sided, Kolmogorov Smirnov Test for RDDs

• [SPARK-8600] - Naive Bayes API for spark.ml Pipelines

• [SPARK-8671] - Add isotonic regression to the pipeline API

• [SPARK-8704] - Add missing methods in StandardScaler (ML and PySpark)

• [SPARK-8706] - Implement Pylint / Prospector checks for PySpark

• [SPARK-8711] - Add additional methods to JavaModel wrappers in trees

• [SPARK-8774] - Add R model formula with basic support as a transformer

• [SPARK-8777] - Add random data generation test utilities to Spark SQL

• [SPARK-8782] - GenerateOrdering fails for NullType (i.e. ORDER BY NULL crashes)

• [SPARK-8798] - Allow additional uris to be fetched with mesos

• [SPARK-8807] - Add between operator in SparkR

• [SPARK-8847] - String concatination with column in SparkR

• [SPARK-8867] - Show the UDF usage for user.

• [SPARK-8874] - Add missing methods in Word2Vec ML

• [SPARK-8882] - A New Receiver Scheduling Mechanism

• [SPARK-8936] - Hyperparameter estimation in LDA

• [SPARK-8967] - Implement @since as an annotation

• [SPARK-8996] - Add Python API for Kolmogorov-Smirnov Test

• [SPARK-9022] - UnsafeProject

• [SPARK-9023] - UnsafeExchange

• [SPARK-9024] - Unsafe HashJoin

• [SPARK-9028] - Add CountVectorizer as an estimator to generate CountVectorizerModel

• [SPARK-9112] - Implement LogisticRegressionSummary similar to LinearRegressionSummary

• [SPARK-9115] - date/time function: dayInYear

• [SPARK-9143] - Add planner rule for automatically inserting Unsafe <-> Safe row format converters

• [SPARK-9178] - UTF8String empty string method

• [SPARK-9201] - Integrate MLlib with SparkR using RFormula

• [SPARK-9230] - SparkR RFormula should support StringType features

• [SPARK-9231] - DistributedLDAModel method for top topics per document

• [SPARK-9245] - DistributedLDAModel predict top topic per doc-term instance

• [SPARK-9246] - DistributedLDAModel predict top docs per topic

• [SPARK-9263] - Add Spark Submit flag to exclude dependencies when using --packages

• [SPARK-9381] - Migrate JSON data source to the new partitioning data source

• [SPARK-9391] - Support minus, dot, and intercept operators in SparkR RFormula

• [SPARK-9440] - LocalLDAModel should save docConcentration, topicConcentration, and gammaShape

• [SPARK-9464] - Add property-based tests for UTF8String

• [SPARK-9471] - Multilayer perceptron classifier

• [SPARK-9544] - RFormula in Python

• [SPARK-9657] - PrefixSpan getMaxPatternLength should return an Int

• [SPARK-10106] - Add `ifelse` Column function to SparkR

Apache Spark 是一种与 Hadoop 相似的开源集群计算环境，但是两者之间还存在一些不同之处，这些有用的不同之处使 Spark 在某些工作负载方面表现得更加优越，换句话说，Spark 启用了内存分布数据集，除了能够提供交互式查询外，它还可以优化迭代工作负载。

Spark 是在 Scala 语言中实现的，它将 Scala 用作其应用程序框架。与 Hadoop 不同，Spark 和 Scala 能够紧密集成，其中的 Scala 可以像操作本地集合对象一样轻松地操作分布式数据集。

尽 管创建 Spark 是为了支持分布式数据集上的迭代作业，但是实际上它是对 Hadoop 的补充，可以在 Hadoo 文件系统中并行运行。通过名为 Mesos 的第三方集群框架可以支持此行为。Spark 由加州大学伯克利分校 AMP 实验室 (Algorithms, Machines, and People Lab) 开发，可用来构建大型的、低延迟的数据分析应用程序。

历史版本 :
Apache Spark 2.2.0 正式发布，提高可用性和稳定性
Spark 2.0 时代全面到来 —— 2.0.1 版本发布
Apache Spark 2.0.0 发布，APIs 更新
Apache Spark 1.6.2 发布，集群计算环境
Spark 2.0 预览：更简单，更快，更智能
Spark 2.7.6 发布，开源集群计算环境
Apache spark 1.6.1 发布，集群计算环境
Apache Spark 2.0 最快今年4月亮相
Apache Spark 1.6 正式发布，性能大幅度提升
Apache Spark 1.6 预览版：更简便的搜索
Apache Spark 1.5.2 发布，开源集群计算环境
Apache Spark 1.5.1 发布，开源集群计算环境