{"id":2579,"date":"2024-06-13T08:44:38","date_gmt":"2024-06-13T00:44:38","guid":{"rendered":"https:\/\/nj.transwarp.cn:8180\/?p=2579"},"modified":"2024-06-13T08:51:38","modified_gmt":"2024-06-13T00:51:38","slug":"hdfs-snapshot-%e4%bd%bf%e7%94%a8%e6%8c%87%e5%8d%97","status":"publish","type":"post","link":"https:\/\/kbwp.transwarp.cn\/?p=2579","title":{"rendered":"HDFS Snapshot \u4f7f\u7528\u6307\u5357"},"content":{"rendered":"<h3>\u6982\u8981\u8bf4\u660e<\/h3>\n<hr \/>\n<p>HDFS \u5feb\u7167\u662f\u6587\u4ef6\u7cfb\u7edf\u7684\u53ea\u8bfb\u65f6\u95f4\u70b9\u526f\u672c\u3002\u53ef\u4ee5\u5728\u6587\u4ef6\u7cfb\u7edf\u7684\u5b50\u76ee\u5f55\u6216\u6574\u4e2a\u6587\u4ef6\u7cfb\u7edf\u4e0a\u521b\u5efa\u5feb\u7167\u3002\u5feb\u7167\u7684\u4e00\u4e9b\u5e38\u89c1\u9002\u7528\u573a\u666f\u662f\u6570\u636e\u5907\u4efd\u3001\u7528\u6237\u8bef\u64cd\u4f5c\u65f6\u7684\u707e\u96be\u6062\u590d\u3002<\/p>\n<h3>\u8be6\u7ec6\u8bf4\u660e<\/h3>\n<hr \/>\n<ul>\n<li>\u5feb\u7167\u76ee\u5f55\uff1a\u4e00\u65e6\u76ee\u5f55\u88ab\u8bbe\u7f6e\u4e3a\u5feb\u7167\u76ee\u5f55 \uff0c\u5c31\u53ef\u4ee5\u5728\u8be5\u76ee\u5f55\u4e0b\u521b\u5efa\u5feb\u7167\u3002<\/li>\n<li>\u5feb\u7167\u6587\u4ef6\u8def\u5f84\uff1a\u5bf9\u4e8e\u53ef\u5feb\u7167\u76ee\u5f55\uff0c\u53ef\u4ee5\u901a\u8fc7\u8bbf\u95ee\u8def\u5f84 \u201c.snapshot\u201d \u6765\u8bbf\u95ee\u5176\u5feb\u7167\u3002<\/li>\n<\/ul>\n<p>\u6bd4\u5982 TDH \u96c6\u7fa4\u4e2d\uff0c\u5c06 \/ \u8bbe\u7f6e\u4e3a\u5feb\u7167\u76ee\u5f55\uff0c\u8be5\u76ee\u5f55\u4e0b\u521b\u5efa\u7684\u5feb\u7167\uff0c\u90fd\u53ef\u4ee5\u901a\u8fc7\u8bbf\u95ee \/.snapshot\/ \u8bbf\u95ee\u6240\u6709\u5feb\u7167\u3002<\/p>\n<p><strong>\u5728\u521b\u5efa snapshot \u4e4b\u524d\uff0c\u6211\u4eec\u9700\u8981\u5148\u521b\u5efa\u5feb\u7167\u76ee\u5f55\uff0c\u547d\u4ee4\u5982\u4e0b\uff1a<\/strong><\/p>\n<pre><code class=\"language-shell\">[root@tdh-01~\/mysh]# hdfs dfsadmin -allowSnapshot \/udf\/\n2021-10-08 11:53:23,492 INFO util.KerberosUtil: Using principal pattern: HTTP\/_HOST\nAllowing snaphot on \/udf\/ succeeded<\/code><\/pre>\n<p><img decoding=\"async\" src=\"https:\/\/nj.transwarp.cn:8180\/wp-content\/uploads\/2021\/10\/image-1633665324694.png\" alt=\"file\" \/><\/p>\n<p><strong>\u7136\u540e\u521b\u5efa\u4e00\u4e2a\u5feb\u7167\uff0c \u547d\u4ee4\u683c\u5f0f\u5982\u4e0b\uff1a<\/strong><br \/>\nhdfs dfs -createSnapshot &lt;\u8def\u5f84&gt; [&lt;\u5feb\u7167\u540d\u79f0&gt;]<\/p>\n<pre><code class=\"language-shell\">[root@tdh-01~\/mysh]# hdfs dfs -createSnapshot \/inceptor3\/inceptor3-20211008\n2021-10-08 13:51:47,280 INFO util.KerberosUtil: Using principal pattern: HTTP\/_HOST\nCreated snapshot \/inceptor3\/.snapshot\/inceptor3-20211008<\/code><\/pre>\n<p><strong>\u67e5\u770b\u5feb\u7167\u6587\u4ef6\uff0c\u547d\u4ee4\u683c\u5f0f\u5982\u4e0b\uff1a<\/strong><\/p>\n<p>hdfs dfs -ls \/udf\/.snapshot\/udf-20211008<\/p>\n<pre><code class=\"language-shell\">[root@tdh-01~\/mysh]# hdfs dfs -ls \/udf\/.snapshot\/udf-20211008\/\n2021-10-08 14:00:24,728 INFO util.KerberosUtil: Using principal pattern: HTTP\/_HOST\nFound 2 items\n-rw-r--r--   3 admin hbase       7634 2020-09-01 10:40 \/udf\/.snapshot\/udf-20211008\/AESudf.jar\n-rw-r--r--   3 admin hbase   18802901 2020-09-02 10:05 \/udf\/.snapshot\/udf-20211008\/AESudf2.jar<\/code><\/pre>\n<p><strong>\u5229\u7528\u5feb\u7167\u6062\u590d\u5185\u5bb9\uff0c\u547d\u4ee4\u683c\u5f0f\u5982\u4e0b\uff1a<\/strong><br \/>\nhdfs dfs -cp -ptopax [\u5feb\u7167\u6587\u4ef6] [\u6062\u590d\u8def\u5f84]<\/p>\n<pre><code class=\"language-shell\">[root@tdh-01~\/mysh]# hdfs dfs -cp -ptopax \/udf\/.snapshot\/udf-20211008\/AESudf.jar \/udf\/\n2021-10-08 14:44:12,396 INFO util.KerberosUtil: Using principal pattern: HTTP\/_HOST<\/code><\/pre>\n<p><strong>\u5220\u9664\u5feb\u7167\uff0c\u4ece\u53ef\u5feb\u7167\u76ee\u5f55\u4e2d\u5220\u9664 \u7684\u5feb\u7167\u3002\u6b64\u64cd\u4f5c\u9700\u8981\u5feb\u7167\u76ee\u5f55\u7684\u6240\u6709\u8005\u6743\u9650\u3002\u547d\u4ee4\u683c\u5f0f\u5982\u4e0b\uff1a<\/strong><br \/>\nhdfs dfs -deleteSnapshot &lt;\u8def\u5f84&gt; &lt;\u5feb\u7167\u540d\u79f0&gt;<\/p>\n<p><strong>\u91cd\u547d\u540d\u5feb\u7167\uff0c\u547d\u4ee4\u683c\u5f0f\u5982\u4e0b\uff1a<\/strong><br \/>\nhdfs dfs -renameSnapshot &lt;\u8def\u5f84&gt; &lt;\u65e7\u540d\u79f0&gt; &lt;\u65b0\u540d\u79f0&gt;<\/p>\n<p>\u83b7\u53d6\u53ef\u5feb\u7167\u76ee\u5f55\u5217\u8868\uff0c\u547d\u4ee4\u683c\u5f0f\u5982\u4e0b\uff1a<br \/>\nhdfs lsSnapshottableDir<\/p>\n<p>\u83b7\u53d6\u5feb\u7167\u5dee\u5f02\u62a5\u544a\uff0c\u547d\u4ee4\u683c\u5f0f\u5982\u4e0b\uff1a<br \/>\nhdfs snapshotDiff [path] [fromSnapshot] [toSnapshot]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6982\u8981\u8bf4\u660e HDFS \u5feb\u7167\u662f\u6587\u4ef6\u7cfb\u7edf\u7684\u53ea\u8bfb\u65f6\u95f4\u70b9\u526f\u672c\u3002\u53ef\u4ee5\u5728\u6587\u4ef6\u7cfb\u7edf\u7684\u5b50\u76ee\u5f55\u6216\u6574\u4e2a\u6587\u4ef6\u7cfb\u7edf\u4e0a\u521b\u5efa\u5feb\u7167\u3002\u5feb\u7167\u7684\u4e00\u4e9b ..<\/p>\n<div class=\"clear-fix\"><\/div>\n<p><a href=\"https:\/\/kbwp.transwarp.cn\/?p=2579\" 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-2579","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\/2579","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=2579"}],"version-history":[{"count":4,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts\/2579\/revisions"}],"predecessor-version":[{"id":13323,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts\/2579\/revisions\/13323"}],"wp:attachment":[{"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2579"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2579"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2579"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}