{"id":41967,"date":"2022-08-15T08:35:21","date_gmt":"2022-12-22T23:20:02","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e8%ae%a9%e6%88%91%e4%bb%ac%e9%80%9a%e8%bf%87%e4%bd%bf%e7%94%a8postgresql15%e5%92%8cpg_exclusive_backup%e6%9d%a5%e5%a4%8d%e7%8e%b0%e5%85%b3%e4%ba%8e%e5%9c%a8%e7%ba%bf%e7%89%a9%e7%90%86%e5%a4%87\/"},"modified":"2024-01-15T11:13:36","modified_gmt":"2024-01-15T03:13:36","slug":"%e8%ae%a9%e6%88%91%e4%bb%ac%e9%80%9a%e8%bf%87%e4%bd%bf%e7%94%a8postgresql15%e5%92%8cpg_exclusive_backup%e6%9d%a5%e5%a4%8d%e7%8e%b0%e5%85%b3%e4%ba%8e%e5%9c%a8%e7%ba%bf%e7%89%a9%e7%90%86%e5%a4%87","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e8%ae%a9%e6%88%91%e4%bb%ac%e9%80%9a%e8%bf%87%e4%bd%bf%e7%94%a8postgresql15%e5%92%8cpg_exclusive_backup%e6%9d%a5%e5%a4%8d%e7%8e%b0%e5%85%b3%e4%ba%8e%e5%9c%a8%e7%ba%bf%e7%89%a9%e7%90%86%e5%a4%87\/","title":{"rendered":"\u8ba9\u6211\u4eec\u901a\u8fc7\u4f7f\u7528PostgreSQL15\u548cpg_exclusive_backup\u6765\u590d\u73b0\u5173\u4e8e\u5728\u7ebf\u7269\u7406\u5907\u4efd\u7684\u72ec\u5360\u6a21\u5f0f\u4e0b\u7684\u670d\u52a1\u5668\u542f\u52a8\u5931\u8d25\u95ee\u9898\uff01"},"content":{"rendered":"<p>\u8fd9\u662f\u300a2022\u5e74PostgreSQL\u964d\u4e34\u8282\u65e5\u5386\u300b\u7b2c\u4e94\u5929\u7684\u6587\u7ae0\u3002<\/p>\n<p>\u6839\u636e\u4e0b\u9762\u7248\u672c\u8bf4\u660e\u7684\u6761\u76ee\uff0cPostgreSQL15\u79fb\u9664\u4e86\u5728\u7ebf\u7269\u7406\u5907\u4efd\u7684\u6392\u4ed6\u6a21\u5f0f\u3002\u7248\u672c\u8bf4\u660e\u4e2d\u6307\u51fa\u79fb\u9664\u6392\u4ed6\u6a21\u5f0f\u7684\u539f\u56e0\u662f\uff0c\u5982\u679c\u6570\u636e\u5e93\u670d\u52a1\u5668\u5728\u8be5\u6a21\u5f0f\u4e0b\u7a81\u7136\u505c\u6b62\uff0c\u53ef\u80fd\u5bfc\u81f4\u670d\u52a1\u5668\u542f\u52a8\u5931\u8d25\u3002\u73b0\u5728\u6211\u4eec\u5c06\u5177\u4f53\u786e\u8ba4\u8be5\u95ee\u9898\u662f\u5982\u4f55\u53d1\u751f\u7684\u3002<\/p>\n<blockquote><p>\u5220\u9664\u957f\u671f\u4e0d\u63a8\u8350\u4f7f\u7528\u7684\u6392\u4ed6\u5907\u4efd\u6a21\u5f0f\uff08David Steele\uff0cNathan Bossart\uff09\u3002<br \/>\n\u5982\u679c\u6570\u636e\u5e93\u670d\u52a1\u5668\u5728\u6b64\u6a21\u5f0f\u4e0b\u7a81\u7136\u505c\u6b62\uff0c\u670d\u52a1\u5668\u53ef\u80fd\u65e0\u6cd5\u542f\u52a8\u3002\u975e\u6392\u4ed6\u5907\u4efd\u6a21\u5f0f\u88ab\u8ba4\u4e3a\u5728\u6240\u6709\u60c5\u51b5\u4e0b\u90fd\u66f4\u4f18\u3002\u51fd\u6570pg_start_backup()\/pg_stop_backup()\u5df2\u66f4\u540d\u4e3apg_backup_start()\/pg_backup_stop()\uff0c\u51fd\u6570pg_backup_start_time()\u548cpg_is_in_backup()\u5df2\u88ab\u5220\u9664\u3002<\/p><\/blockquote>\n<p>\u8fd9\u4e2a\u95ee\u9898\u5728\u4f7f\u7528\u6392\u4ed6\u6a21\u5f0f\u7684 PostgreSQL14 \u53ca\u4e4b\u524d\u7248\u672c\u4e2d\u4f1a\u53d1\u751f\uff0c\u4f46\u672c\u6b21\u6211\u4eec\u6545\u610f\u4f7f\u7528\u201c\u5728 PostgreSQL15 \u53ca\u4ee5\u540e\u7248\u672c\u4e2d\u4e5f\u652f\u6301\u6392\u4ed6\u6a21\u5f0f\u7684 pg_exclusive_backup \u6269\u5c55\u201d\u5728 PostgreSQL15 \u4e0a\u8fdb\u884c\u590d\u73b0\u3002<\/p>\n<p>\u987a\u4fbf\u63d0\u4e00\u53e5\uff0c\u5173\u4e8e\u72ec\u5360\u6a21\u5f0f\u548c\u975e\u72ec\u5360\u6a21\u5f0f\u7684\u533a\u522b\uff0c\u4ee5\u53ca\u72ec\u5360\u6a21\u5f0f\u88ab\u5220\u9664\u7684\u80cc\u666f\u7b49\u5185\u5bb9\uff0c\u53ef\u4ee5\u5728PostgreSQL\u672a\u516c\u5f00\u8bf4\u660e\u4e66\u7684\u6f14\u793a\u8d44\u6599\u4e2d\u627e\u5230\u89e3\u91ca\uff0c\u8bf7\u52a1\u5fc5\u53c2\u8003\u3002<\/p>\n<h2>\u4e3aPostgreSQL15\u51c6\u5907pg_exclusive_backup\u3002<\/h2>\n<p>\u5728\u5b89\u88c5\u4e86PostgreSQL15\u7684\u73af\u5883\u4e2d\uff0c\u53ef\u4ee5\u53c2\u8003\u8fd9\u91cc\u6765\u5b89\u88c5pg_exclusive_backup 1.0\u7248\u672c\u3002\u53ef\u4ee5\u4ece\u8fd9\u91cc\u83b7\u53d6\u6e90\u4ee3\u7801\u538b\u7f29\u6587\u4ef6\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"gp\">$<\/span> <span class=\"nb\">tar <\/span>zxf pg_exclusive_backup-1.0.tar.gz\r\n<span class=\"gp\">$<\/span> <span class=\"nb\">cd <\/span>pg_exclusive_backup-1.0\/\r\n<span class=\"gp\">$<\/span> make <span class=\"nv\">USE_PGXS<\/span><span class=\"o\">=<\/span>1\r\n<span class=\"gp\">$<\/span> make <span class=\"nv\">USE_PGXS<\/span><span class=\"o\">=<\/span>1 <span class=\"nb\">install<\/span>\r\n<\/code><\/pre>\n<p>\u5b89\u88c5\u6210\u529f\u540e\uff0c\u4f7f\u7528CREATE EXTENSION\u547d\u4ee4\u6ce8\u518cpg_exclusive_backup\u63d2\u4ef6\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"gp\">$<\/span> psql <span class=\"nt\">-c<\/span> <span class=\"s2\">\"CREATE EXTENSION pg_exclusive_backup\"<\/span>\r\n<\/code><\/pre>\n<h2>\u786e\u8ba4\u4f7f\u7528\u72ec\u5360\u6a21\u5f0f\u8fdb\u884c\u5907\u4efd\u83b7\u53d6\u6b65\u9aa4<\/h2>\n<p>\u5728\u91cd\u73fe\u554f\u984c\u4e4b\u524d\uff0c\u9996\u5148\u78ba\u8a8d\u9032\u884c\u6392\u4ed6\u6a21\u5f0f\u7684\u5099\u4efd\u53d6\u5f97\u6b65\u9a5f\u3002\u6b65\u9a5f\u5982\u4e0b\u6240\u793a\uff0c\u985e\u4f3c\u65bc\u4ee5\u4e0b\u57f7\u884c\u793a\u4f8b\u3002<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u5f00\u59cb\u5907\u4efd\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>$ psql -c &#8220;SELECT pg_start_backup(&#8216;test&#8217;, true)&#8221;<\/ol>\n<\/li>\n<\/ol>\n<p>\u83b7\u53d6\u6570\u636e\u5e93\u6570\u636e\u5907\u4efd\u3002<br \/>\n$ cp -a $PGDATA \/backup\/<\/p>\n<p>\u7ed3\u675f\u5907\u4efd\u3002<br \/>\n$ psql -c &#8220;SELECT pg_stop_backup()&#8221;<\/p>\n<h2>\u901a\u8fc7\u590d\u73b0\u542f\u52a8\u5931\u8d25\u95ee\u9898\uff0c\u7531\u4e8e\u6392\u4ed6\u6a21\u5f0f\u5f15\u8d77\u7684\u95ee\u9898\u3002<\/h2>\n<p>\u4e3a\u4e86\u6a21\u62df\u6392\u4ed6\u6a21\u5f0f\u4e0b\u7684\u95ee\u9898\uff0c\u60a8\u53ef\u4ee5\u5728\u5907\u4efd\u5f00\u59cb\u548c\u7ed3\u675f\u4e4b\u95f4\u591a\u6b21\u5207\u6362WAL\u6587\u4ef6\u5e76\u751f\u6210\u68c0\u67e5\u70b9\uff0c\u4ee5\u786e\u4fdd\u5907\u4efd\u5f00\u59cb\u65f6\u7684WAL\u6587\u4ef6\u88ab\u5220\u9664\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u60a8\u53ef\u4ee5\u5728\u5907\u4efd\u7ed3\u675f\u4e4b\u524d\u5f02\u5e38\u7ec8\u6b62PostgreSQL\uff0c\u5e76\u901a\u8fc7\u5d29\u6e83\u6062\u590d\u65b9\u5f0f\u542f\u52a8PostgreSQL\u3002\u4ee5\u4e0b\u662f\u6267\u884c\u793a\u4f8b\u3002<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u5f00\u59cb\u5907\u4efd\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>$ psql -c &#8220;SELECT pg_start_backup(&#8216;test&#8217;, true)&#8221;<\/ol>\n<\/li>\n<\/ol>\n<p>\u4ece\u7531pg_start_backup()\u521b\u5efa\u7684backup_label\u6587\u4ef6\u4e2d\u786e\u8ba4\u5907\u4efd\u5f00\u59cb\u65f6\u7684WAL\u6587\u4ef6\u3002\u5728\u4ee5\u4e0b\u793a\u4f8b\u4e2d\uff0c\u53ef\u4ee5\u786e\u8ba4000000010000000000000002\u662f\u5907\u4efd\u5f00\u59cb\u65f6\u7684WAL\u6587\u4ef6\u3002<br \/>\n$ cat $PGDATA\/backup_label<br \/>\nSTART WAL LOCATION: 0\/2000028 (file 000000010000000000000002)<br \/>\nCHECKPOINT LOCATION: 0\/2000060<br \/>\nBACKUP METHOD: pg_start_backup<br \/>\nBACKUP FROM: primary<br \/>\nSTART TIME: 2022-12-05 15:02:31 JST<br \/>\nLABEL: test<br \/>\nSTART TIMELINE: 1<\/p>\n<p>\u6267\u884c\u591a\u6b21WAL\u6587\u4ef6\u5207\u6362\u548c\u68c0\u67e5\u70b9\u3002<br \/>\n$ psql -c &#8220;SELECT pg_switch_wal(); CHECKPOINT&#8221;<br \/>\n$ psql -c &#8220;SELECT pg_switch_wal(); CHECKPOINT&#8221;<br \/>\n$ psql -c &#8220;SELECT pg_switch_wal(); CHECKPOINT&#8221;<br \/>\n$ psql -c &#8220;SELECT pg_switch_wal(); CHECKPOINT&#8221;<\/p>\n<p>\u786e\u8ba4\u5907\u4efd\u5f00\u59cb\u65f6\u7684WAL\u6587\u4ef6\u5df2\u88ab\u5220\u9664\u3002\u5982\u679c\u5c1a\u672a\u5220\u9664\uff0c\u5219\u8fd4\u56de\u6b65\u9aa43\u3002<br \/>\n$ ls $PGDATA\/pg_wal<br \/>\n000000010000000000000006 000000010000000000000007 archive_status<\/p>\n<p>(\u5728\u5b8c\u6210\u5907\u4efd\u4e4b\u524d)\u5411postmaster\u8fdb\u7a0b\u53d1\u9001SIGKILL\u4fe1\u53f7\uff0c\u5f02\u5e38\u7ec8\u6b62PostgreSQL\u3002<br \/>\n$ kill -SIGKILL $(head -1 data\/postmaster.pid)<\/p>\n<p>\u542f\u52a8PostgreSQL\u3002\u5d29\u6e83\u6062\u590d\u5931\u8d25\uff0c\u542f\u52a8\u5931\u8d25\u3002<br \/>\n$ pg_ctl start<br \/>\n&#8230;<br \/>\nLOG: database system was interrupted; last known up at 2022-12-05 15:04:30 JST<br \/>\nLOG: invalid checkpoint record<br \/>\nFATAL: could not locate required checkpoint record<br \/>\nHINT: If you are restoring from a backup, touch &#8220;\/System\/Volumes\/Data\/opt\/pgsql-15.1\/data\/recovery.signal&#8221; and add required recovery options.<br \/>\nIf you are not restoring from a backup, try removing the file &#8220;\/System\/Volumes\/Data\/opt\/pgsql-15.1\/data\/backup_label&#8221;.<br \/>\nBe careful: removing &#8220;\/System\/Volumes\/Data\/opt\/pgsql-15.1\/data\/backup_label&#8221; will result in a corrupt cluster if restoring from a backup.<br \/>\nLOG: startup process (PID 65731) exited with exit code 1<br \/>\nLOG: aborting startup due to startup process failure<br \/>\nLOG: database system is shut down<\/p>\n<p>\u5728\u8fdb\u884cPostgreSQL\u542f\u52a8\u65f6\uff0c\u8981\u6c42\u5728$PGDATA\u76ee\u5f55\u4e0b\u5b58\u5728backup_label\u6587\u4ef6\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0cPostgreSQL\u4f1a\u5c1d\u8bd5\u4ece\u5907\u4efd\u5f00\u59cb\u65f6\u7684WAL\u6587\u4ef6\uff08\u4e0a\u8ff0\u4e3a000000010000000000000002\uff09\u8fdb\u884c\u5d29\u6e83\u6062\u590d\u3002\u7136\u800c\uff0c\u7531\u4e8e\u8be5WAL\u6587\u4ef6\u5df2\u88ab\u68c0\u67e5\u70b9\u5220\u9664\uff0c\u56e0\u6b64\u65e0\u6cd5\u5f00\u59cb\u6062\u590d\uff0c\u542f\u52a8\u5c06\u5931\u8d25\u3002<\/p>\n<p>\u8fd9\u4e2a\u542f\u52a8\u5931\u8d25\u662f\u6392\u4ed6\u6a21\u5f0f\u7279\u6709\u7684\u95ee\u9898\uff0c\u800c\u6392\u4ed6\u6a21\u5f0f\u88ab\u8ba4\u4e3a\u662f\u4e0d\u63a8\u8350\u7684\uff0c\u5e76\u4e14\u662f PostgreSQL 15 \u4e2d\u88ab\u5220\u9664\u7684\u539f\u56e0\u4e4b\u4e00\u3002\u53e6\u4e00\u65b9\u9762\uff0c\u975e\u6392\u4ed6\u6a21\u5f0f\u4e0b\uff0c\u5728\u5907\u4efd\u5f00\u59cb\u65f6\u4e0d\u4f1a\u5728$PGDATA\u4e0b\u521b\u5efabackup_label\uff0c\u56e0\u6b64\u4e0d\u4f1a\u51fa\u73b0\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n<blockquote><p>\u5982\u679c\u60a8\u4e0d\u662f\u4ece\u5907\u4efd\u4e2d\u6062\u590d\u6570\u636e\uff0c\u8bf7\u5c1d\u8bd5\u5220\u9664\u6587\u4ef6\u201c\/System\/Volumes\/Data\/opt\/pgsql-15.1\/data\/backup_label\u201d\u3002<\/p><\/blockquote>\n<p>\u987a\u4fbf\u63d0\u4e00\u4e0b\uff0c\u8981\u6210\u529f\u4ece\u72b6\u60016\u542f\u52a8\uff0c\u9700\u8981\u6839\u636e\u542f\u52a8\u5931\u8d25\u65f6\u7684\u63d0\u793a\u4fe1\u606f(\u4e0a\u8ff0\u6458\u5f55)\u5220\u9664\u5907\u4efd\u6807\u7b7e\u3002\u8fd9\u6837\u4e00\u6765\uff0cPostgreSQL\u5c06\u80fd\u591f\u4ece\u6700\u65b0\u7684\u68c0\u67e5\u70b9\u4f4d\u7f6e\u7684WAL\u6587\u4ef6\u5f00\u59cb\u5d29\u6e83\u6062\u590d\uff0c\u800c\u4e0d\u662f\u4ece\u5907\u4efd\u5f00\u59cb\uff0c\u4ece\u800c\u6210\u529f\u542f\u52a8\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"gp\">$<\/span> <span class=\"nb\">rm<\/span> <span class=\"nv\">$PGDATA<\/span>\/backup_label\r\n<span class=\"gp\">$<\/span> pg_ctl start\r\n<span class=\"c\">...\r\n<\/span><span class=\"go\">LOG:  database system is ready to accept connections\r\n<\/span><\/code><\/pre>\n<h2>\u6700\u540e<\/h2>\n<p>\u7531\u4e8e\u5728\u7ebf\u7269\u7406\u5907\u4efd\u7684\u4e92\u65a5\u6a21\u5f0f\u5b58\u5728\u7c7b\u4f3c\u6211\u4eec\u8fd9\u6b21\u786e\u8ba4\u5230\u7684\u670d\u52a1\u5668\u542f\u52a8\u5931\u8d25\u7684\u98ce\u9669\uff0cPostgreSQL15\u5df2\u5c06\u5176\u5220\u9664\u3002\u56e0\u6b64\uff0c\u5728\u5347\u7ea7\u5230PostgreSQL15\u53ca\u66f4\u9ad8\u7248\u672c\u65f6\uff0c\u4e4b\u524d\u4f7f\u7528\u4e92\u65a5\u6a21\u5f0f\u7684\u7528\u6237\u9700\u8981\u8003\u8651\u8f6c\u79fb\u5230\u975e\u4e92\u65a5\u6a21\u5f0f\u3002<\/p>\n<p>\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u72ec\u5360\u6a21\u5f0f\u53ef\u80fd\u66f4\u65b9\u4fbf\u4f7f\u7528\uff0c\u5728\u4f7f\u7528pg_exclusive_backup\u5de5\u5177\u8fdb\u884cPostgreSQL15\u53ca\u66f4\u9ad8\u7248\u672c\u7684\u5907\u4efd\u65f6\uff0c\u8bf7\u52a1\u5fc5\u8003\u8651\u5230\u670d\u52a1\u5668\u542f\u52a8\u5931\u8d25\u7684\u98ce\u9669\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8fd9\u662f\u300a2022\u5e74PostgreSQL\u964d\u4e34\u8282\u65e5\u5386\u300b\u7b2c\u4e94\u5929\u7684\u6587\u7ae0\u3002 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