{"id":5606,"date":"2025-03-11T14:40:42","date_gmt":"2025-03-11T06:40:42","guid":{"rendered":"https:\/\/nj.transwarp.cn:8180\/?p=5606"},"modified":"2025-03-11T14:40:42","modified_gmt":"2025-03-11T06:40:42","slug":"inceptor-sql-%e7%9a%84-task-%e6%95%b0%e9%87%8f","status":"publish","type":"post","link":"https:\/\/kbwp.transwarp.cn\/?p=5606","title":{"rendered":"inceptor sql \u7684 task \u6570\u91cf"},"content":{"rendered":"<h3>\u6982\u8981\u63cf\u8ff0<\/h3>\n<p>inceptor sql \u63d0\u4ea4\u540e\u7684 task \u6570\u76ee\u4f1a\u5f71\u54cd\u6027\u80fd\uff0c\u672c\u6587\u7b80\u5355\u4ecb\u7ecd\u4e00\u4e0b\u51b3\u5b9a\u4e00\u4e2a sql \u5bf9\u5e94\u7684 task \u6570\u76ee\u7684\u51e0\u4e2a\u56e0\u7d20\uff1b<\/p>\n<hr \/>\n<h3>\u8be6\u7ec6\u8bf4\u660e<\/h3>\n<p>\u4e3b\u8981\u5206\u4e3a map \u9636\u6bb5 \u548c reduce \u9636\u6bb5\u6765\u4ecb\u7ecd<\/p>\n<hr \/>\n<h4>map \u9636\u6bb5 task \u6570\u91cf<\/h4>\n<h5>1\u3001text \u8868<\/h5>\n<p>\u53d6\u51b3\u4e8e text \u8868\u6570\u636e\u5728 hdfs \u4e0a\u7684\u6587\u4ef6\u6570\u91cf\uff1b\u5f53\u5355\u4e2a\u6587\u4ef6\u5927\u4e8e HDFS \u9ed8\u8ba4\u914d\u7f6e\u7684 blocksize \u4e3a 128M \u65f6\u4f1a\u81ea\u52a8\u5207\u5206\u3002<\/p>\n<h5>2\u3001\u5206\u6876\u4e0d\u5206\u533a<\/h5>\n<p>\u4e00\u822c\uff0ctask \u6570\u76ee\u4e3a\u5206\u6876\u6570<\/p>\n<h5>3\u3001\u5206\u6876\u4e14\u5206\u533a<\/h5>\n<p>\u5982\u679c\u6ca1\u6709\u5206\u533a\u8fc7\u6ee4\uff0c\u5219 task \u6570\u76ee\u4e3a\u3000\u5206\u533a\u6570 <em> \u6876\u6570<br \/>\n\u5982\u679c\u6709\u5206\u533a\u8fc7\u6ee4\uff0c\u5219 task \u6570\u76ee\u4e3a\u3000\u8fc7\u6ee4\u540e\u7684\u5206\u533a\u6570 <\/em> \u6876\u6570<\/p>\n<h4>Reduce \u9636\u6bb5 task\u6570\u76ee<\/h4>\n<p>reduce task \u6570\u76ee\u662f\u7531 map task \u6570\u76ee\u548c operator \u7c7b\u578b\u51b3\u5b9a\u7684\u3002<\/p>\n<h5>1\u3001group by<\/h5>\n<p>reduce task \u6570\u76ee\u4e3a map task \u6570 * 0.6<\/p>\n<h5>2\u3001join \u64cd\u4f5c<\/h5>\n<p>reduce task \u6570\u76ee\u4e3a map task \u6570 * 1<\/p>\n<h4>\u624b\u52a8\u63a7\u5236 task \u6570\u76ee<\/h4>\n<p>reduce task \u6570\u53ef\u4ee5\u901a\u8fc7\u4e0b\u9762\u53c2\u6570\u8bbe\u7f6e\uff1a<br \/>\nmapred.reduce.tasks   \/\/\u8bbe\u7f6e reduce \u4e2a\u6570<br \/>\nmapred.minreduce.tasks\u3000\/\/\u8bbe\u7f6e\u6700\u5c0f reduce\u4e2a\u6570<br \/>\n\u53e6\u5916\uff0c\u4e3b\u8981\u7684 operator \u5bf9\u5e94\u7684\u7cfb\u6570\u662f\u53ef\u4ee5\u8c03\u6574\u7684\uff0c\u4e0d\u8fc7\u4e0d\u5efa\u8bae\u968f\u4fbf\u8c03\u6574\u3002<\/p>\n<p><strong>\u6ce8\u610f\uff1a\u5bf9\u5206\u6876\u8868\u63d2\u5165\uff0c\u5982\u679c mapred.reduce.tasks \u8ddf\u6876\u6570\u4e0d\u4e00\u81f4\uff0c\u7ed3\u679c\u53ef\u80fd\u6709\u95ee\u9898\uff0c\u6240\u4ee5\u5206\u6876\u8868\u63d2\u5165\u65f6\uff0c\u4e0d\u8981\u8bbe\u7f6e mapred.reduce.tasks\u3002<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6982\u8981\u63cf\u8ff0 inceptor sql \u63d0\u4ea4\u540e\u7684 task \u6570\u76ee\u4f1a\u5f71\u54cd\u6027\u80fd\uff0c\u672c\u6587\u7b80\u5355\u4ecb\u7ecd\u4e00\u4e0b\u51b3\u5b9a\u4e00\u4e2a sql \u5bf9\u5e94 ..<\/p>\n<div class=\"clear-fix\"><\/div>\n<p><a href=\"https:\/\/kbwp.transwarp.cn\/?p=5606\" title=\"read more...\">Read more<\/a><\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-5606","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"acf":[],"_links":{"self":[{"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts\/5606","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5606"}],"version-history":[{"count":1,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts\/5606\/revisions"}],"predecessor-version":[{"id":16059,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts\/5606\/revisions\/16059"}],"wp:attachment":[{"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5606"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5606"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5606"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}