大数据持续升温, 不熟悉几个大数据组件, 连装逼的口头禅都没有。 最起码, 你要会说个hadoop, hdfs, mapreduce, yarn, kafka, spark, zookeeper, neo4j吧, 这些都是装逼的必备技能。
关于spark的详细介绍, 网上一大堆, 搜搜便是, 下面, 我们来说单机版的spark的安装和简要使用。
0. 安装jdk, 由于我的机器上之前已经有了jdk, 所以这一步我可以省掉。 jdk已经是很俗气的老生常谈了, 不多说, 用java/scala的时候可少不了。
代码语言:javascript复制ubuntu@VM-0-15-ubuntu:~$ java -version
openjdk version "1.8.0_151"
OpenJDK Runtime Environment (build 1.8.0_151-8u151-b12-0ubuntu0.16.04.2-b12)
OpenJDK 64-Bit Server VM (build 25.151-b12, mixed mode)
ubuntu@VM-0-15-ubuntu:~$
1. 你并不一定需要安装hadoop, 只需要选择特定的spark版本即可。你并不需要下载scala, 因为spark会默认带上scala shell. 去spark官网下载, 在没有hadoop的环境下, 可以选择:spark-2.2.1-bin-hadoop2.7, 然后解压, 如下:
代码语言:javascript复制ubuntu@VM-0-15-ubuntu:~/taoge/spark_calc$ ll
total 196436
drwxrwxr-x 3 ubuntu ubuntu 4096 Feb 2 19:57 ./
drwxrwxr-x 9 ubuntu ubuntu 4096 Feb 2 19:54 ../
drwxrwxr-x 13 ubuntu ubuntu 4096 Feb 2 19:58 spark-2.2.1-bin-hadoop2.7/
-rw-r--r-- 1 ubuntu ubuntu 200934340 Feb 2 19:53 spark-2.2.1-bin-hadoop2.7.tgz
2. spark中有python和scala版本的, 下面, 我来用scala版本的shell, 如下:
代码语言:javascript复制ubuntu@VM-0-15-ubuntu:~/taoge/spark_calc/spark-2.2.1-bin-hadoop2.7$ bin/spark-shell
Using Spark's default log4j profile: org/apache/spark/log4j-defaults.properties
Setting default log level to "WARN".
To adjust logging level use sc.setLogLevel(newLevel). For SparkR, use setLogLevel(newLevel).
18/02/02 20:12:16 WARN NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
18/02/02 20:12:16 WARN Utils: Your hostname, localhost resolves to a loopback address: 127.0.0.1; using 172.17.0.15 instead (on interface eth0)
18/02/02 20:12:16 WARN Utils: Set SPARK_LOCAL_IP if you need to bind to another address
Spark context Web UI available at http://172.17.0.15:4040
Spark context available as 'sc' (master = local[*], app id = local-1517573538209).
Spark session available as 'spark'.
Welcome to
____ __
/ __/__ ___ _____/ /__
_ / _ / _ `/ __/ '_/
/___/ .__/_,_/_/ /_/_ version 2.2.1
/_/
Using Scala version 2.11.8 (OpenJDK 64-Bit Server VM, Java 1.8.0_151)
Type in expressions to have them evaluated.
Type :help for more information.
scala>
来进行简单操作:
代码语言:javascript复制scala> val lines = sc.textFile("README.md")
lines: org.apache.spark.rdd.RDD[String] = README.md MapPartitionsRDD[1] at textFile at <console>:24
scala> lines.count()
res0: Long = 103
scala> lines.first()
res1: String = # Apache Spark
scala> :quit
ubuntu@VM-0-15-ubuntu:~/taoge/spark_calc/spark-2.2.1-bin-hadoop2.7$
ubuntu@VM-0-15-ubuntu:~/taoge/spark_calc/spark-2.2.1-bin-hadoop2.7$
ubuntu@VM-0-15-ubuntu:~/taoge/spark_calc/spark-2.2.1-bin-hadoop2.7$
ubuntu@VM-0-15-ubuntu:~/taoge/spark_calc/spark-2.2.1-bin-hadoop2.7$ wc -l README.md
103 README.md
ubuntu@VM-0-15-ubuntu:~/taoge/spark_calc/spark-2.2.1-bin-hadoop2.7$ head -n 1 README.md
# Apache Spark
ubuntu@VM-0-15-ubuntu:~/taoge/spark_calc/spark-2.2.1-bin-hadoop2.7$
来看看可视化的web页面, 在Windows上输入: http://ip:4040
OK, 本文仅仅是简单的安装, 后面我们会继续深入介绍spark.
总结
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