{"id":4952,"date":"2021-03-24T10:13:25","date_gmt":"2021-03-24T02:13:25","guid":{"rendered":"https:\/\/nj.transwarp.cn:8180\/?p=4952"},"modified":"2021-03-24T10:13:24","modified_gmt":"2021-03-24T02:13:24","slug":"tdh-4-3-%e5%a6%82%e4%bd%95%e6%89%a7%e8%a1%8c-hdfs-%e6%95%b0%e6%8d%ae-rebalance","status":"publish","type":"post","link":"https:\/\/kbwp.transwarp.cn\/?p=4952","title":{"rendered":"TDH 4.3 \u5982\u4f55\u6267\u884c HDFS \u6570\u636e balance"},"content":{"rendered":"<h3>\u6982\u8981\u63cf\u8ff0<\/h3>\n<p>\u96c6\u7fa4\u4f7f\u7528\u4e00\u6bb5\u65f6\u95f4\uff0c\u4f1a\u9047\u5230\u4e0d\u540c datanode \u8282\u70b9\u4e4b\u95f4\u78c1\u76d8\u4f7f\u7528\u7387\u76f8\u5dee\u8f83\u5927\u7684\u60c5\u51b5\uff1b\u6216\u8005\u96c6\u7fa4\u6269\u5bb9\u6570\u636e\u8282\u70b9\u4ee5\u540e\uff0c\u4e5f\u4f1a\u9762\u4e34\u65b0\u8001\u8282\u70b9\u78c1\u76d8\u4f7f\u7528\u7387\u76f8\u5dee\u8f83\u5927\u7684\u60c5\u51b5\u3002<br \/>\n\u672c\u6587\u4ecb\u7ecd\u4e00\u79cd\u65b9\u6cd5\uff0c\u53ef\u4ee5\u8fdb\u884c\u6570\u636e rebalance\uff0c\u5b9e\u73b0 datanode \u8282\u70b9\u4f7f\u7528\u7387\u8f83\u4e3a\u5e73\u5747\u7684\u6548\u679c\u3002<\/p>\n<p>\u73af\u5883\uff1aTDH4.3<\/p>\n<h3>\u8be6\u7ec6\u8bf4\u660e<\/h3>\n<h5>1\u3001\u8ba4\u8bc1<\/h5>\n<p>\u8bbf\u95ee\u4efb\u610f\u4e00\u53f0\u90e8\u7f72\u4e86 datanode \u670d\u52a1\u7684\u670d\u52a1\u5668\uff0c\u7136\u540e\u6267\u884c\u5982\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre><code class=\"language-shell\"># \u64cd\u4f5c\u9700\u8981\u4f7f\u7528hdfs\u7528\u6237\uff0c\u6240\u4ee5\u9996\u5148kinit\u5b89\u5168\nkinit hdfs\/$(hostname) -kt \/etc\/hdfs1\/hdfs.keytab<\/code><\/pre>\n<h5>2\u3001\u8bbe\u7f6e balance \u5e26\u5bbd<\/h5>\n<p>\u6267\u884c\u4e0b\u9762\u547d\u4ee4\uff0c\u8bbe\u7f6e balance \u65f6\u5019\u7684\u5e26\u5bbd<\/p>\n<pre><code class=\"language-shell\">hdfs dfsadmin -setBalancerBandwidth 52428800\n# \u8fd9\u91cc\u7684 52428800 \u4e3a balance \u65f6\u7684\u5e26\u5bbd 50M (50*1024*1024)\uff0c\u53ef\u4ee5\u6839\u636e\u8282\u70b9\u5b9e\u9645\u7684\u5e26\u5bbd\u8fdb\u884c\u8c03\u6574\uff0c\u5efa\u8bae\u4fdd\u6301\u9ed8\u8ba4\uff0c\u5982\u679c\u8bbe\u7f6e\u592a\u5927\u4f1a\u5f71\u54cd\u65e5\u5e38\u4e1a\u52a1\uff0c\n# \u4e00\u822c 1000m \u7684\u7f51\u5361\uff0c\u5e26\u5bbd\u5efa\u8bae\u8bbe\u7f6e\u4e3a 50m\n# \u9ed8\u8ba4\u53c2\u6570\u4e3a 1048576\uff081M\uff09\uff0cbalance \u7ed3\u675f\u540e\u53ca\u65f6\u8c03\u6574\u56de\u6765<\/code><\/pre>\n<h5>3\u3001\u6267\u884c balance<\/h5>\n<pre><code class=\"language-shell\">nohup hdfs balancer -threshold 10 &>\/tmp\/rb2020.log\n# \u8fd9\u91cc\u7684 threshold 10 \u4e3a datanode \u8282\u70b9\u95f4\u78c1\u76d8\u7a7a\u95f4\u4f7f\u7528\u7387\u76f8\u5dee\u9608\u503c\uff0c\u533a\u95f4\u9009\u62e9\uff1a0~100\uff0c\u610f\u601d\u662f\u8282\u70b9\u95f4\u78c1\u76d8\u7a7a\u95f4\u4f7f\u7528\u7387\u76f8\u5dee\u8d85\u8fc7 10% \u65f6\u624d\u4f1a\u6267\u884c balance\uff1b\n# \u5efa\u8bae nohup \u653e\u5728\u540e\u53f0\u6267\u884c\uff0c\u5e76\u5c06\u6267\u884c\u8fc7\u7a0b\u65e5\u5fd7\u91cd\u5b9a\u5411\u5230\u65e5\u5fd7\u4e2d\uff0c\u65b9\u4fbf\u67e5\u770b<\/code><\/pre>\n<p><img decoding=\"async\" src=\"\/wp-content\/uploads\/2021\/01\/16097253391.png\" alt=\"\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6982\u8981\u63cf\u8ff0 \u96c6\u7fa4\u4f7f\u7528\u4e00\u6bb5\u65f6\u95f4\uff0c\u4f1a\u9047\u5230\u4e0d\u540c datanode \u8282\u70b9\u4e4b\u95f4\u78c1\u76d8\u4f7f\u7528\u7387\u76f8\u5dee\u8f83\u5927\u7684\u60c5\u51b5\uff1b\u6216\u8005\u96c6\u7fa4\u6269\u5bb9\u6570\u636e\u8282 ..<\/p>\n<div class=\"clear-fix\"><\/div>\n<p><a href=\"https:\/\/kbwp.transwarp.cn\/?p=4952\" title=\"read more...\">Read more<\/a><\/p>\n","protected":false},"author":60,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[36,124,1],"tags":[],"class_list":["post-4952","post","type-post","status-publish","format-standard","hentry","category-migration","category-124","category-uncategorized"],"acf":[],"_links":{"self":[{"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts\/4952","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\/60"}],"replies":[{"embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4952"}],"version-history":[{"count":1,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts\/4952\/revisions"}],"predecessor-version":[{"id":5541,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts\/4952\/revisions\/5541"}],"wp:attachment":[{"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4952"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4952"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4952"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}