{"id":3447,"date":"2021-07-26T07:05:33","date_gmt":"2021-07-26T07:05:33","guid":{"rendered":"https:\/\/www.bearloga.space\/?page_id=3447"},"modified":"2021-07-26T07:05:33","modified_gmt":"2021-07-26T07:05:33","slug":"pyspark-storagelevel","status":"publish","type":"page","link":"https:\/\/www.bearloga.space\/en\/pyspark-storagelevel\/","title":{"rendered":"PySpark \u2014 StorageLevel"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">StorageLevel \u0440\u0435\u0448\u0430\u0435\u0442, \u043a\u0430\u043a \u0441\u043b\u0435\u0434\u0443\u0435\u0442 \u0445\u0440\u0430\u043d\u0438\u0442\u044c RDD.&nbsp;\u0412 Apache Spark StorageLevel \u0440\u0435\u0448\u0430\u0435\u0442, \u0434\u043e\u043b\u0436\u0435\u043d \u043b\u0438 RDD \u0445\u0440\u0430\u043d\u0438\u0442\u044c\u0441\u044f \u0432 \u043f\u0430\u043c\u044f\u0442\u0438 \u0438\u043b\u0438 \u043d\u0430 \u0434\u0438\u0441\u043a\u0435, \u0438\u043b\u0438 \u0438 \u0442\u043e, \u0438 \u0434\u0440\u0443\u0433\u043e\u0435.&nbsp;\u041e\u043d \u0442\u0430\u043a\u0436\u0435 \u0440\u0435\u0448\u0430\u0435\u0442, \u0441\u043b\u0435\u0434\u0443\u0435\u0442 \u043b\u0438 \u0441\u0435\u0440\u0438\u0430\u043b\u0438\u0437\u043e\u0432\u0430\u0442\u044c RDD \u0438 \u0440\u0435\u043f\u043b\u0438\u0446\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u043b\u0438 \u0440\u0430\u0437\u0434\u0435\u043b\u044b RDD.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0421\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u0439 \u0431\u043b\u043e\u043a \u043a\u043e\u0434\u0430 \u0438\u043c\u0435\u0435\u0442 \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u0435 \u043a\u043b\u0430\u0441\u0441\u0430 StorageLevel \u2014<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">class pyspark.StorageLevel(useDisk, useMemory, useOffHeap, deserialized, replication = 1)\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u0422\u0435\u043f\u0435\u0440\u044c, \u0447\u0442\u043e\u0431\u044b \u0432\u044b\u0431\u0440\u0430\u0442\u044c \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0435 RDD, \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u044e\u0442 \u0440\u0430\u0437\u043d\u044b\u0435 \u0443\u0440\u043e\u0432\u043d\u0438 \u0445\u0440\u0430\u043d\u0435\u043d\u0438\u044f, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043f\u0440\u0438\u0432\u0435\u0434\u0435\u043d\u044b \u043d\u0438\u0436\u0435:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>DISK_ONLY<\/strong>&nbsp;= StorageLevel (True, False, False, False, 1)<\/li><li><strong>DISK_ONLY_2<\/strong>&nbsp;= StorageLevel (True, False, False, False, 2)<\/li><li><strong>MEMORY_AND_DISK<\/strong>&nbsp;= StorageLevel (True, True, False, False, 1)<\/li><li><strong>MEMORY_AND_DISK_2<\/strong>&nbsp;= StorageLevel (True, True, False, False, 2)<\/li><li><strong>MEMORY_AND_DISK_SER<\/strong>&nbsp;= StorageLevel (True, True, False, False, 1)<\/li><li><strong>MEMORY_AND_DISK_SER_2<\/strong>&nbsp;= StorageLevel (True, True, False, False, 2)<\/li><li><strong>MEMORY_ONLY<\/strong>&nbsp;= StorageLevel (False, True, False, False, 1)<\/li><li><strong>MEMORY_ONLY_2<\/strong>&nbsp;= StorageLevel (False, True, False, False, 2)<\/li><li><strong>MEMORY_ONLY_SER<\/strong>&nbsp;= StorageLevel (False, True, False, False, 1)<\/li><li><strong>MEMORY_ONLY_SER_2<\/strong>&nbsp;= StorageLevel (False, True, False, False, 2)<\/li><li><strong>OFF_HEAP<\/strong>&nbsp;= StorageLevel (True, True, True, False, 1)<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>DISK_ONLY<\/strong>&nbsp;= StorageLevel (True, False, False, False, 1)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>DISK_ONLY_2<\/strong>&nbsp;= StorageLevel (True, False, False, False, 2)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>MEMORY_AND_DISK<\/strong>&nbsp;= StorageLevel (True, True, False, False, 1)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>MEMORY_AND_DISK_2<\/strong>\u00a0= StorageLevel (True, True, False, False, 2)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>MEMORY_AND_DISK_SER<\/strong>&nbsp;= StorageLevel (True, True, False, False, 1)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>MEMORY_AND_DISK_SER_2<\/strong>&nbsp;= StorageLevel (True, True, False, False, 2)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>MEMORY_ONLY<\/strong>&nbsp;= StorageLevel (False, True, False, False, 1)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>MEMORY_ONLY_2<\/strong>&nbsp;= StorageLevel (False, True, False, False, 2)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>MEMORY_ONLY_SER<\/strong>&nbsp;= StorageLevel (False, True, False, False, 1)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>MEMORY_ONLY_SER_2<\/strong>&nbsp;= StorageLevel (False, True, False, False, 2)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>OFF_HEAP<\/strong>&nbsp;= StorageLevel (True, True, True, False, 1)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0414\u0430\u0432\u0430\u0439\u0442\u0435 \u0440\u0430\u0441\u0441\u043c\u043e\u0442\u0440\u0438\u043c \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u0439 \u043f\u0440\u0438\u043c\u0435\u0440 StorageLevel, \u0433\u0434\u0435 \u043c\u044b \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u043c \u0443\u0440\u043e\u0432\u0435\u043d\u044c \u0445\u0440\u0430\u043d\u0435\u043d\u0438\u044f&nbsp;<strong>MEMORY_AND_DISK_2,<\/strong>&nbsp;\u0447\u0442\u043e \u043e\u0437\u043d\u0430\u0447\u0430\u0435\u0442&nbsp;<strong>,<\/strong>&nbsp;\u0447\u0442\u043e \u0440\u0430\u0437\u0434\u0435\u043b\u044b RDD \u0431\u0443\u0434\u0443\u0442 \u0438\u043c\u0435\u0442\u044c \u0440\u0435\u043f\u043b\u0438\u043a\u0430\u0446\u0438\u044e 2.<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">------------------------------------storagelevel.py-------------------------------------\nfrom pyspark import SparkContext\nimport pyspark\nsc = SparkContext (\n   \"local\", \n   \"storagelevel app\"\n)\nrdd1 = sc.parallelize([1,2])\nrdd1.persist( pyspark.StorageLevel.MEMORY_AND_DISK_2 )\nrdd1.getStorageLevel()\nprint(rdd1.getStorageLevel())\n------------------------------------storagelevel.py-------------------------------------\n<\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u041a\u043e\u043c\u0430\u043d\u0434\u0430<\/strong>&nbsp;\u2014 \u041a\u043e\u043c\u0430\u043d\u0434\u0430 \u0432\u044b\u0433\u043b\u044f\u0434\u0438\u0442 \u0441\u043b\u0435\u0434\u0443\u044e\u0449\u0438\u043c \u043e\u0431\u0440\u0430\u0437\u043e\u043c \u2014<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">$SPARK_HOME\/bin\/spark-submit storagelevel.py<\/pre>\n","protected":false},"excerpt":{"rendered":"<p>StorageLevel \u0440\u0435\u0448\u0430\u0435\u0442, \u043a\u0430\u043a \u0441\u043b\u0435\u0434\u0443\u0435\u0442 \u0445\u0440\u0430\u043d\u0438\u0442\u044c RDD.&nbsp;\u0412 Apache Spark StorageLevel \u0440\u0435\u0448\u0430\u0435\u0442, \u0434\u043e\u043b\u0436\u0435\u043d \u043b\u0438 RDD \u0445\u0440\u0430\u043d\u0438\u0442\u044c\u0441\u044f \u0432 \u043f\u0430\u043c\u044f\u0442\u0438 \u0438\u043b\u0438 \u043d\u0430 \u0434\u0438\u0441\u043a\u0435, \u0438\u043b\u0438 [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"categories":[111],"tags":[],"class_list":["post-3447","page","type-page","status-publish","hentry","category-pyspark"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/pages\/3447","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/comments?post=3447"}],"version-history":[{"count":0,"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/pages\/3447\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/media?parent=3447"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/categories?post=3447"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bearloga.space\/en\/wp-json\/wp\/v2\/tags?post=3447"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}