TiSpark 快速上手

为了让大家快速体验 TiSpark,通过 TiUP 安装的 TiDB 集群中默认已集成 Spark 和 TiSpark jar 包。

部署信息

  • Spark 默认部署在 TiDB 实例部署目录下 spark 目录中

  • TiSpark jar 包默认部署在 Spark 部署目录 jars 文件夹下:spark/jars/tispark-${name_with_version}.jar

  • TiSpark 示例数据和导入脚本可点击 TiSpark 示例数据下载。

    tispark-sample-data/

环境准备

在 TiDB 实例上安装 JDK

Oracle JDK 官方下载页面 下载 JDK 1.8 当前最新版,本示例中下载的版本为 jdk-8u141-linux-x64.tar.gz

解压并根据您的 JDK 部署目录设置环境变量,编辑 ~/.bashrc 文件,比如:

export JAVA_HOME=/home/pingcap/jdk1.8.0_144 && export PATH=$JAVA_HOME/bin:$PATH

验证 JDK 有效性:

java -version
java version "1.8.0_144" Java(TM) SE Runtime Environment (build 1.8.0_144-b01) Java HotSpot(TM) 64-Bit Server VM (build 25.144-b01, mixed mode)

导入样例数据

假设 TiDB 集群已启动,其中一台 TiDB 实例服务 IP 为 192.168.0.2,端口为 4000,用户名为 root, 密码为空。

wget http://download.pingcap.org/tispark-sample-data.tar.gz && \ tar -zxvf tispark-sample-data.tar.gz && \ cd tispark-sample-data

修改 sample_data.sh 中 TiDB 登录信息,比如:

mysql --local-infile=1 -h 192.168.0.2 -P 4000 -u root < dss.ddl

执行脚本

./sample_data.sh

登录 TiDB 并验证数据包含 TPCH_001 库及以下表:

mysql -uroot -P4000 -h192.168.0.2
show databases;
+--------------------+ | Database | +--------------------+ | INFORMATION_SCHEMA | | PERFORMANCE_SCHEMA | | TPCH_001 | | mysql | | test | +--------------------+ 5 rows in set (0.00 sec)
use TPCH_001;
Reading table information for completion of table and column names You can turn off this feature to get a quicker startup with -A Database changed
show tables;
+--------------------+ | Tables_in_TPCH_001 | +--------------------+ | CUSTOMER | | LINEITEM | | NATION | | ORDERS | | PART | | PARTSUPP | | REGION | | SUPPLIER | +--------------------+ 8 rows in set (0.00 sec)

使用范例

进入 spark 部署目录启动 spark-shell:

cd spark && bin/spark-shell

然后像使用原生 Spark 一样查询 TiDB 表:

scala> spark.sql("select count(*) from lineitem").show

结果为

+--------+ |count(1)| +--------+ | 60175| +--------+

下面执行另一个复杂一点的 Spark SQL:

scala> spark.sql( """select | l_returnflag, | l_linestatus, | sum(l_quantity) as sum_qty, | sum(l_extendedprice) as sum_base_price, | sum(l_extendedprice * (1 - l_discount)) as sum_disc_price, | sum(l_extendedprice * (1 - l_discount) * (1 + l_tax)) as sum_charge, | avg(l_quantity) as avg_qty, | avg(l_extendedprice) as avg_price, | avg(l_discount) as avg_disc, | count(*) as count_order |from | lineitem |where | l_shipdate <= date '1998-12-01' - interval '90' day |group by | l_returnflag, | l_linestatus |order by | l_returnflag, | l_linestatus """.stripMargin).show

结果为:

+------------+------------+---------+--------------+--------------+ |l_returnflag|l_linestatus| sum_qty|sum_base_price|sum_disc_price| +------------+------------+---------+--------------+--------------+ | A| F|380456.00| 532348211.65|505822441.4861| | N| F| 8971.00| 12384801.37| 11798257.2080| | N| O|742802.00| 1041502841.45|989737518.6346| | R| F|381449.00| 534594445.35|507996454.4067| +------------+------------+---------+--------------+--------------+ (续) -----------------+---------+------------+--------+-----------+ sum_charge| avg_qty| avg_price|avg_disc|count_order| -----------------+---------+------------+--------+-----------+ 526165934.000839|25.575155|35785.709307|0.050081| 14876| 12282485.056933|25.778736|35588.509684|0.047759| 348| 1029418531.523350|25.454988|35691.129209|0.049931| 29181| 528524219.358903|25.597168|35874.006533|0.049828| 14902| -----------------+---------+------------+--------+-----------+

更多样例请参考 pingcap/tispark-test

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