{"id":13590,"date":"2024-07-25T16:53:09","date_gmt":"2024-07-25T08:53:09","guid":{"rendered":"https:\/\/nj.transwarp.cn:8180\/?p=13590"},"modified":"2024-07-25T16:53:09","modified_gmt":"2024-07-25T08:53:09","slug":"refreshmetacache%e5%91%bd%e4%bb%a4%e4%bd%bf%e7%94%a8%e8%af%b4%e6%98%8e","status":"publish","type":"post","link":"https:\/\/kbwp.transwarp.cn\/?p=13590","title":{"rendered":"refreshmetacache\u547d\u4ee4\u4f7f\u7528\u8bf4\u660e"},"content":{"rendered":"<h3>\u6982\u8981\u63cf\u8ff0<\/h3>\n<hr \/>\n<p>MetaCache \u662f\u5728 metastore \u4e4b\u4e0a\u6dfb\u52a0\u7684\u529f\u80fd\uff0c\u5728 Inceptor Server \u7aef\u589e\u52a0\u4e00\u4e2a\u5bf9 Metastore \u4e2d\u6570\u636e\u7684 cache\uff0c\u5728\u9ad8\u5e76\u53d1\u573a\u666f\u4e0b\u6765\u51cf\u5c11 server \u8ddf metastore \u901a\u4fe1\u7684\u6b21\u6570,\u63d0\u9ad8SQL\u6267\u884c\u6548\u7387\uff1b<\/p>\n<p>\u5728\u8bbe\u7f6e <code>ngmr.metacache.level=server<\/code> \u524d\u63d0\u4e0b\uff0c\u5f53\u591a\u4e2a server \u5171\u4eab\u540c\u4e00\u4e2ametastore\u65f6\uff0c\u5982\u679c\u4e00\u4e2aserver\u5bf9\u4e00\u4e2atable\u7684metadata\u8fdb\u884c\u4e86\u4fee\u6539\uff0c\u53e6\u5916\u7684server\u5728\u8bbf\u95ee\u66f4\u65b0\u540e\u7684metadata\u65f6\uff0c\u5982\u679c\u8be5\u4fe1\u606f\u88ab\u7f13\u5b58\u81f3 cache\uff0c\u4f1a\u56e0 cache \u672a\u66f4\u65b0\u5bfc\u81f4\u6570\u636e\u4e0d\u4e00\u81f4\u62a5\u9519\uff0c\u9664\u975e\u91cd\u542f\u8be5 server \u6216\u8005\u7b49\u5f85cache \u8fc7\u671f(\u9ed8\u8ba4\u65f6\u95f4\u4e3a1\u5c0f\u65f6\uff0c<code>ngmr.metacache.server.timeout.ms=3600000<\/code>)\u3002<\/p>\n<p>\u6240\u4ee5\uff0c<font color=red><strong><code>set ngmr.metacache=true;<\/code> \u4ec5\u9650\u4e8e\u9ad8\u5e76\u53d1\u6d4b\u8bd5\u573a\u666f\u4e0b\u9002\u7528\uff0c\u4e0d\u9002\u7528\u4e8e\u591a\u4e2aInceptor Server\u5171\u7528\u4e00\u4e2aMetastore\u7684\u573a\u666f<\/strong><\/font><\/p>\n<p>\u8bbe\u7f6e metacache \u7ea7\u522b\uff1a<code>set ngmr.metacache.level={none, statement, server}<\/code><\/p>\n<ul>\n<li>\u5f53\u8bbe\u7f6e\u4e3astagement\u65f6\uff0c\u8868\u793a\u4ec5\u5bf9\u5f53\u524dsession\u8fdb\u884cMeta\u7684\u7f13\u5b58<\/li>\n<li>\u5f53\u8bbe\u7f6e\u4e3aserver\u65f6\uff0c\u8868\u793a\u5bf9server\u4e0a\u6240\u6709\u4efb\u52a1\u90fd\u5f00\u542fMeta\u7684\u7f13\u5b58\uff0c\u56e0\u6b64\u5f53DDL\u6709\u53d8\u5316\u662f\uff0c\u9700\u8981\u66f4\u65b0\u7f13\u5b58\u7684Meta\u4fe1\u606f<\/li>\n<\/ul>\n<p>\u672c\u6587\u4ecb\u7ecd\uff0c\u5982\u4f55\u901a\u8fc7<code>refreshmetacache<\/code>\u547d\u4ee4\uff0c\u5728\u4e0d\u91cd\u542fserver\u7684\u60c5\u51b5\u4e0b\uff0c\u6e05\u7a7aserver\u4e2d\u5bf9\u5e94\u7684cache\u3002<\/p>\n<h3>\u8be6\u7ec6\u8bf4\u660e<\/h3>\n<hr \/>\n<p><strong>\u6d4b\u8bd5\u73af\u5883\uff1a<\/strong><br \/>\nargodb 5.2.3 + \u6700\u65b0patch<\/p>\n<p>\u6211\u4eec\u6709Quark1\u548cQuark2\u4e24\u4e2a\u7ec4\u4ef6\uff0cQuark2\u5171\u4eab\u4e86Quark1\u7684metastore\uff0c<\/p>\n<p><strong>Step1\uff0c Quark1\u4e0b\u521b\u5efa\u6d4b\u8bd5\u8868<\/strong><\/p>\n<pre><code class=\"language-sql\">DROP TABLE IF EXISTS testmetacache;\nCREATE TABLE testmetacache (id INT,name string) STORED AS HOLODESK;<\/code><\/pre>\n<p><strong>Step2\uff0cQuark2\u67e5\u8be2\u8868\uff0c\u4fdd\u8bc1server\u5c06table\u7684metadata cache\u4f4f<\/strong><\/p>\n<pre><code class=\"language-sql\">--ngmr.metacache.level\u53c2\u6570\uff0c\u9ed8\u8ba4\u503c\u662fstatement\uff0c\u6240\u4ee5\u8fd9\u91cc\u4f1a\u6210\u529fcache\u4f4f\n--set ngmr.metacache.level=statement\nselect * from testmetacache;<\/code><\/pre>\n<p><strong>Step3\uff0cQuark1\u65b0\u589e\u5217<\/strong><\/p>\n<pre><code class=\"language-sql\">--\u5bf9\u6d4b\u8bd5\u8868\u65b0\u589e\u5217\nALTER TABLE testmetacache ADD COLUMNs (age int);<\/code><\/pre>\n<p><strong>Step4\uff0cQuark2\u67e5\u8be2\u8868\u62a5\u9519<\/strong><\/p>\n<pre><code class=\"language-sql\">--\u5f00\u542fserver\u7684metacache\nset ngmr.metacache.level=server;\n--\u67e5\u8be2\u62a5\u9519\nselect * from testmetacache;<\/code><\/pre>\n<p><img decoding=\"async\" src=\"https:\/\/nj.transwarp.cn:8180\/wp-content\/uploads\/2024\/07\/image-1721037738442.png\" alt=\"file\" \/><\/p>\n<p><strong>Step5\uff0cQuark2\u6267\u884crefreshmetacache\u64cd\u4f5c<\/strong><\/p>\n<pre><code class=\"language-sql\">--\u8be5\u64cd\u4f5c\u5c06\u6e05\u9664metacache\u4e2d\u5bf9\u5e94\u7684table, table partition, Privilege\nrefreshmetacache table default.testmetacache;\n\n--\u53ea\u8f93\u5165tblName,dbName\u9ed8\u8ba4\u4e3a\u5f53\u524dsession\u6240\u4f7f\u7528\u7684database\nuse default;\nrefreshmetacache table testmetacache;\n\n--\u8be5\u64cd\u4f5c\u5c06\u6e05\u9664metacache\u4e2d\u5bf9\u5e94\u7684dbName, dbName\u6240\u5728\u7684table, table partition, Privilege\nrefreshmetacache database default;\n\n--\u8be5\u64cd\u4f5c\u6e05\u9664\u6240\u6709\u7684metacache, \u5efa\u8bae\u5f53\u6709\u5143\u4fe1\u606f\u6539\u52a8\u65f6,\u5f00\u4e86server cache\u7684server\u65e0\u6cd5\u8bfb\u53d6\u5230\u6539\u52a8\u65f6\u4f7f\u7528\nrefreshmetacache all<\/code><\/pre>\n<p>\u6267\u884c\u4e0a\u8ff0\u4efb\u610f\u4e00\u4e2a\u547d\u4ee4\u5373\u53ef\uff0c\u518d\u6b21\u67e5\u8be2\u8868\uff0c\u6b63\u5e38\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6982\u8981\u63cf\u8ff0 MetaCache \u662f\u5728 metastore \u4e4b\u4e0a\u6dfb\u52a0\u7684\u529f\u80fd\uff0c\u5728 Inceptor Server \u7aef ..<\/p>\n<div class=\"clear-fix\"><\/div>\n<p><a href=\"https:\/\/kbwp.transwarp.cn\/?p=13590\" title=\"read more...\">Read more<\/a><\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-13590","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\/13590","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\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=13590"}],"version-history":[{"count":3,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts\/13590\/revisions"}],"predecessor-version":[{"id":13717,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=\/wp\/v2\/posts\/13590\/revisions\/13717"}],"wp:attachment":[{"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=13590"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=13590"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kbwp.transwarp.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=13590"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}