{"id":50143,"date":"2023-07-21T01:26:59","date_gmt":"2023-02-20T05:21:07","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8spark%e5%92%8ccassandra%e8%bf%9b%e8%a1%8c%e6%95%b0%e6%8d%ae%e5%8d%8f%e5%90%8c%e3%80%82\/"},"modified":"2024-04-30T14:33:59","modified_gmt":"2024-04-30T06:33:59","slug":"%e4%bd%bf%e7%94%a8spark%e5%92%8ccassandra%e8%bf%9b%e8%a1%8c%e6%95%b0%e6%8d%ae%e5%8d%8f%e5%90%8c%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8spark%e5%92%8ccassandra%e8%bf%9b%e8%a1%8c%e6%95%b0%e6%8d%ae%e5%8d%8f%e5%90%8c%e3%80%82\/","title":{"rendered":"\u4f7f\u7528Spark\u548cCassandra\u8fdb\u884c\u6570\u636e\u534f\u540c"},"content":{"rendered":"

\u9996\u5148<\/h1>\n

\u5728\u6570\u636e\u5206\u6790\u4e2d\uff0c\u7ecf\u5e38\u6709\u4f7f\u7528Apache Spark + Cassandra\u7684\u7ec4\u5408\u6765\u5b9e\u73b0\u7684\u9009\u9879\u3002<\/p>\n

Apache Spark\u662f\u4e00\u79cd\u5f00\u6e90\u7684\u5927\u6570\u636e\u5904\u7406\u6846\u67b6\u3002<\/h1>\n
\"image.png\"<\/div>\n

\u53ef\u4ee5\u8bbf\u95eeHDFS\u3001Alluxio\u3001Apache Cassandra\u3001Apache HBase\u3001Apache Hive\u7b49\u6570\u767e\u4e2a\u5176\u4ed6\u6570\u636e\u6e90\u4e2d\u7684\u6570\u636e\u3002<\/p><\/blockquote>\n

\u5f3a\u5927\u800c\u5206\u5e03\u5f0f\u7684\u6570\u636e\u96c6\uff08Resilient Distributed Dataset\uff0c\u7b80\u79f0RDD\uff09\u3001\u6570\u636e\u6846\u67b6\uff08DataFrame\uff09\u548c\u6570\u636e\u96c6\uff08DataSet\uff09\u7b49\u3002\u3002\u3002<\/p>\n

\u6765\u6e90\uff1ahttps:\/\/spark.apache.org\/<\/p>\n

\u51fa\u5904\uff1ahttps:\/\/spark.apache.org\/<\/p>\n

Cassandra\u662f\u4ec0\u4e48<\/h1>\n
\"image.png\"<\/div>\n

\u9ad8\u6548\u5730\u7ba1\u7406\u6d77\u91cf\u6570\u636e\uff0c\u5feb\u901f\u5904\u7406\uff0c\u65e0\u9700\u62c5\u5fe7\u7761\u7720\u4e27\u5931\u3002<\/p><\/blockquote>\n

\u5f15\u7528\u6765\u6e90\uff1ahttp:\/\/cassandra.apache.org\/<\/p>\n

\u7279\u522b\u662f\u4ece\u4e00\u5f00\u59cb\u5c31\u8003\u8651\u4e86\u53ef\u6269\u5c55\u6027\uff0c\u56e0\u6b64\u53ef\u4ee5\u8f7b\u677e\u5730\u5efa\u7acb\u96c6\u7fa4\u3002<\/p>\n

\u5c06CSV\u6587\u4ef6\u6570\u636e\u4fdd\u5b58\u5230Cassandra\u7684\u793a\u4f8b\u3002<\/h1>\n

\u6211\u5c06\u5c1d\u8bd5\u521b\u5efa\u4e00\u4e2a\u5c06CSV\u6587\u4ef6\u4fdd\u5b58\u5230Cassandra\u7684Spark\u793a\u4f8b\uff0c\u56e0\u4e3aSpark\u5177\u6709\u8bb8\u591a\u529f\u80fd\u3002<\/p>\n

\u521b\u5efa\u4e00\u4e2a\u540d\u4e3a”users.csv”\u7684\u793a\u4f8b\u6587\u4ef6\u3002<\/h2>\n
\"image.png\"<\/div>\n

\u5728Gradle\u9879\u76ee\u4e2d\u5f15\u5165\u5e93<\/h2>\n
dependencies<\/span> {<\/span>\r\n    \/\/ https:\/\/mvnrepository.com\/artifact\/org.scala-lang\/scala-library<\/span>\r\n    compile<\/span> group:<\/span> 'org.scala-lang'<\/span>,<\/span> name:<\/span> 'scala-library'<\/span>,<\/span> version:<\/span> '2.11.12'<\/span>\r\n\r\n    \/\/ https:\/\/mvnrepository.com\/artifact\/org.apache.spark\/spark-core<\/span>\r\n    compile<\/span> group:<\/span> 'org.apache.spark'<\/span>,<\/span> name:<\/span> 'spark-core_2.11'<\/span>,<\/span> version:<\/span> '2.3.4'<\/span>\r\n\r\n    \/\/ https:\/\/mvnrepository.com\/artifact\/com.datastax.spark\/spark-cassandra-connector<\/span>\r\n    compile<\/span> group:<\/span> 'com.datastax.spark'<\/span>,<\/span> name:<\/span> 'spark-cassandra-connector_2.11'<\/span>,<\/span> version:<\/span> '2.4.1'<\/span>\r\n\r\n    \/\/ https:\/\/mvnrepository.com\/artifact\/org.apache.spark\/spark-sql<\/span>\r\n    compile<\/span> group:<\/span> 'org.apache.spark'<\/span>,<\/span> name:<\/span> 'spark-sql_2.11'<\/span>,<\/span> version:<\/span> '2.3.4'<\/span>\r\n\r\n    \/\/ https:\/\/mvnrepository.com\/artifact\/org.apache.spark\/spark-streaming<\/span>\r\n    compile<\/span> group:<\/span> 'org.apache.spark'<\/span>,<\/span> name:<\/span> 'spark-streaming_2.11'<\/span>,<\/span> version:<\/span> '2.3.4'<\/span>\r\n\r\n}<\/span>\r\n<\/code><\/pre>\n
\u5c06CSV\u6587\u4ef6\u4fdd\u5b58\u5230Cassandra\uff0c\u7136\u540e\u4ece\u6570\u636e\u5e93\u4e2d\u8fdb\u884c\u68c0\u7d22\u3002<\/h2>\n
package<\/span> com.test.spark<\/span>;<\/span>\r\n\r\nimport<\/span> com.datastax.driver.core.Session<\/span>;<\/span>\r\nimport<\/span> com.datastax.spark.connector.cql.CassandraConnector<\/span>;<\/span>\r\n\r\nimport<\/span> java.util.List<\/span>;<\/span>\r\n\r\nimport<\/span> org.apache.log4j.Logger<\/span>;<\/span>\r\nimport<\/span> org.apache.spark.SparkConf<\/span>;<\/span>\r\nimport<\/span> org.apache.spark.api.java.JavaSparkContext<\/span>;<\/span>\r\nimport<\/span> org.apache.spark.sql.Column<\/span>;<\/span>\r\nimport<\/span> org.apache.spark.sql.Dataset<\/span>;<\/span>\r\nimport<\/span> org.apache.spark.sql.Row<\/span>;<\/span>\r\nimport<\/span> org.apache.spark.sql.SaveMode<\/span>;<\/span>\r\nimport<\/span> org.apache.spark.sql.SparkSession<\/span>;<\/span>\r\n\r\npublic<\/span> class<\/span> CsvReader<\/span> {<\/span>\r\n\r\n    private<\/span> static<\/span> final<\/span> Logger<\/span> logger<\/span> =<\/span> Logger<\/span>.<\/span>getLogger<\/span>(<\/span>CsvReader<\/span>.<\/span>class<\/span>);<\/span>\r\n\r\n    public<\/span> static<\/span> void<\/span> main<\/span>(<\/span>String<\/span>[]<\/span> args<\/span>)<\/span> {<\/span>\r\n\r\n        \/\/ Spark\u8a2d\u5b9a<\/span>\r\n        SparkConf<\/span> conf<\/span> =<\/span> new<\/span> SparkConf<\/span>();<\/span>\r\n        conf<\/span>.<\/span>setAppName<\/span>(<\/span>\"CSVReader\"<\/span>);<\/span>\r\n        conf<\/span>.<\/span>setMaster<\/span>(<\/span>\"local[*]\"<\/span>);<\/span>\r\n        conf<\/span>.<\/span>set<\/span>(<\/span>\"spark.cassandra.connection.host\"<\/span>,<\/span> \"192.168.10.248\"<\/span>);<\/span>\r\n        conf<\/span>.<\/span>set<\/span>(<\/span>\"spark.cassandra.connection.port\"<\/span>,<\/span> \"9042\"<\/span>);<\/span>\r\n\r\n        \/\/ Cassandra\u306ekeyspace\u3068\u30c6\u30fc\u30d6\u30eb\u540d<\/span>\r\n        String<\/span> keyspace<\/span> =<\/span> \"sample\"<\/span>;<\/span>\r\n        String<\/span> tableUser<\/span> =<\/span> \"user\"<\/span>;<\/span>\r\n        String<\/span> userCsv<\/span> =<\/span> \"C:\\\\data\\\\spark\\\\users.csv\"<\/span>;<\/span>\r\n\r\n        JavaSparkContext<\/span> sc<\/span> =<\/span> new<\/span> JavaSparkContext<\/span>(<\/span>conf<\/span>);<\/span>\r\n        try<\/span> {<\/span>\r\n            SparkSession<\/span> sparkSession<\/span> =<\/span> SparkSession<\/span>.<\/span>builder<\/span>().<\/span>master<\/span>(<\/span>\"local\"<\/span>).<\/span>appName<\/span>(<\/span>\"CSVReader\"<\/span>)<\/span>\r\n                    .<\/span>config<\/span>(<\/span>\"spark.sql.warehouse.dir\"<\/span>,<\/span> \"file:\/\/\/\/C:\/data\/spark\"<\/span>).<\/span>getOrCreate<\/span>();<\/span>\r\n\r\n            \/\/ Cassandra\u306e\u30b3\u30cd\u30af\u30b7\u30e7\u30f3<\/span>\r\n            CassandraConnector<\/span> connector<\/span> =<\/span> CassandraConnector<\/span>.<\/span>apply<\/span>(<\/span>sc<\/span>.<\/span>getConf<\/span>());<\/span>\r\n\r\n            try<\/span> (<\/span>Session<\/span> session<\/span> =<\/span> connector<\/span>.<\/span>openSession<\/span>())<\/span> {<\/span>\r\n                \/\/ keyspace\u3042\u308b\u5834\u5408\u306f\u524a\u9664\u3059\u308b<\/span>\r\n                session<\/span>.<\/span>execute<\/span>(<\/span>\"DROP KEYSPACE IF EXISTS \"<\/span> +<\/span> keyspace<\/span>);<\/span>\r\n\r\n                \/\/ keyspace\u3092\u4f5c\u6210\u3059\u308b<\/span>\r\n                session<\/span>.<\/span>execute<\/span>(<\/span>\"CREATE KEYSPACE \"<\/span> +<\/span> keyspace<\/span>\r\n                        +<\/span> \" WITH replication = {'class': 'SimpleStrategy', 'replication_factor': 1}\"<\/span>);<\/span>\r\n\r\n                \/\/ \u30c6\u30fc\u30d6\u30eb\u3092\u4f5c\u6210\u3059\u308b<\/span>\r\n                session<\/span>.<\/span>execute<\/span>(<\/span>\"CREATE TABLE \"<\/span> +<\/span> keyspace<\/span> +<\/span> \".\"<\/span> +<\/span> tableUser<\/span>\r\n                        +<\/span> \"(user_id TEXT PRIMARY KEY, user_name TEXT, email_address TEXT, memo TEXT)\"<\/span>);<\/span>\r\n            }<\/span>\r\n\r\n            \/\/ CSV\u304b\u3089\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3059\u308b<\/span>\r\n            \/\/ \u30c6\u30fc\u30d6\u30eb\u5b9a\u7fa9\u306b\u5408\u308f\u305b\u308b\u305f\u3081\u3001\u30ab\u30e9\u30e0\u306eAS\u3082\u91cd\u8981<\/span>\r\n            Dataset<\/span><<\/span>Row<\/span>><\/span> csv<\/span> =<\/span> sparkSession<\/span>.<\/span>read<\/span>().<\/span>format<\/span>(<\/span>\"com.databricks.spark.csv\"<\/span>).<\/span>option<\/span>(<\/span>\"header\"<\/span>,<\/span> \"true\"<\/span>)<\/span>\r\n                    .<\/span>option<\/span>(<\/span>\"encoding\"<\/span>,<\/span> \"UTF-8\"<\/span>).<\/span>load<\/span>(<\/span>userCsv<\/span>).<\/span>select<\/span>(<\/span>new<\/span> Column<\/span>(<\/span>\"\u30e6\u30fc\u30b6\u30fcID\"<\/span>).<\/span>as<\/span>(<\/span>\"user_id\"<\/span>),<\/span>\r\n                            new<\/span> Column<\/span>(<\/span>\"\u6c0f\u540d\"<\/span>).<\/span>as<\/span>(<\/span>\"user_name\"<\/span>),<\/span> \r\n                            new<\/span> Column<\/span>(<\/span>\"\u30e1\u30fc\u30eb\u30a2\u30c9\u30ec\u30b9\"<\/span>).<\/span>as<\/span>(<\/span>\"email_address\"<\/span>),<\/span>\r\n                            new<\/span> Column<\/span>(<\/span>\"\u5099\u8003\"<\/span>).<\/span>as<\/span>(<\/span>\"memo\"<\/span>));<\/span>\r\n\r\n            \/\/ Cassandra\u306b\u4fdd\u5b58<\/span>\r\n            csv<\/span>.<\/span>write<\/span>().<\/span>format<\/span>(<\/span>\"org.apache.spark.sql.cassandra\"<\/span>)<\/span>\r\n                    .<\/span>option<\/span>(<\/span>\"header\"<\/span>,<\/span> \"true\"<\/span>)<\/span>\r\n                    .<\/span>option<\/span>(<\/span>\"keyspace\"<\/span>,<\/span> keyspace<\/span>)<\/span>\r\n                    .<\/span>option<\/span>(<\/span>\"table\"<\/span>,<\/span> tableUser<\/span>)<\/span>\r\n                    .<\/span>option<\/span>(<\/span>\"column\"<\/span>,<\/span> \"user_id\"<\/span>)<\/span>\r\n                    .<\/span>option<\/span>(<\/span>\"column\"<\/span>,<\/span> \"user_name\"<\/span>)<\/span>\r\n                    .<\/span>option<\/span>(<\/span>\"column\"<\/span>,<\/span> \"email_address\"<\/span>)<\/span>\r\n                    .<\/span>option<\/span>(<\/span>\"column\"<\/span>,<\/span> \"memo\"<\/span>)<\/span>\r\n                    .<\/span>mode<\/span>(<\/span>SaveMode<\/span>.<\/span>Append<\/span>)<\/span>\r\n                    .<\/span>save<\/span>();<\/span>\r\n\r\n            \/\/ Cassandra\u304b\u3089\u30c7\u30fc\u30bf\u3092\u8aad\u307f\u51fa\u3059<\/span>\r\n            Dataset<\/span><<\/span>Row<\/span>><\/span> dataset<\/span> =<\/span> sparkSession<\/span>.<\/span>read<\/span>().<\/span>format<\/span>(<\/span>\"org.apache.spark.sql.cassandra\"<\/span>)<\/span>\r\n                    .<\/span>option<\/span>(<\/span>\"keyspace\"<\/span>,<\/span> keyspace<\/span>)<\/span>\r\n                    .<\/span>option<\/span>(<\/span>\"table\"<\/span>,<\/span> tableUser<\/span>).<\/span>load<\/span>();<\/span>\r\n\r\n            \/\/ \u30c7\u30fc\u30bf\u30bb\u30c3\u30c8\u304b\u3089\u914d\u5217\u3092\u53d6\u5f97\u3059\u308b<\/span>\r\n            List<\/span><<\/span>Row<\/span>><\/span> asList<\/span> =<\/span> dataset<\/span>.<\/span>collectAsList<\/span>();<\/span>\r\n            for<\/span> (<\/span>Row<\/span> r<\/span> :<\/span> asList<\/span>)<\/span> {<\/span>\r\n                logger<\/span>.<\/span>info<\/span>(<\/span>r<\/span>);<\/span>\r\n            }<\/span>\r\n        }<\/span> catch<\/span> (<\/span>Exception<\/span> e<\/span>)<\/span> {<\/span>\r\n            logger<\/span>.<\/span>error<\/span>(<\/span>e<\/span>);<\/span>\r\n        }<\/span> finally<\/span> {<\/span>\r\n            sc<\/span>.<\/span>stop<\/span>();<\/span>\r\n            sc<\/span>.<\/span>close<\/span>();<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n\r\n<\/code><\/pre>\n
\u4f7f\u7528\u8005\u8bad\u7ec3\u6765\u5b66\u4e60\uff0c\u4ee5\u751f\u6210\u81ea\u7136\u8bed\u8a00\u6587\u672c\u548c\u4e0b\u4e00\u6b65\u52a8\u4f5c\u7684AI\u6a21\u578b\u3002<\/h2>\n
\"image.png\"<\/div>\n
\u901a\u8fc7JAVA\u68c0\u7d22\u5230\u7684\u7528\u6237\u6570\u636e<\/h2>\n
19\/10\/11 23:18:27 INFO CsvReader: [A000002,yamada.bb@test.com,\u5165\u793e\uff11\uff10\u5e74\u76ee,\u5c71\u7530\u3000\u4e09\u90ce]\r\n19\/10\/11 23:18:27 INFO CsvReader: [A000004,tanaka.bb@test.com,\u5165\u793e\uff13\u5e74\u76ee,\u7530\u4e2d\u3000\u6b21\u90ce]\r\n19\/10\/11 23:18:27 INFO CsvReader: [A000003,tanaka.aa@test.com,\u5165\u793e\uff15\u5e74\u76ee,\u7530\u4e2d\u3000\u4e00\u90ce]\r\n19\/10\/11 23:18:27 INFO CsvReader: [A000001,yamada.aa@test.com,\u5165\u793e\uff11\u5e74\u76ee,\u5c71\u7530\u3000\u592a\u90ce]\r\n<\/code><\/pre>\n
\u57fa\u672c\u64cd\u4f5c\u548c\u5176\u4ed6\u8be6\u7ec6\u8d44\u6599\u53ef\u5728\u6307\u5357\u4e2d\u627e\u5230\u3002
\nSpark\u7f16\u7a0b\u6307\u5357\uff1ahttps:\/\/spark.apache.org\/docs\/2.2.0\/rdd-programming-guide.html<\/p>\n
\u4ee5\u4e0a<\/p>\n","protected":false},"excerpt":{"rendered":"
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