{"id":4509,"date":"2026-06-14T19:31:10","date_gmt":"2026-06-14T19:31:10","guid":{"rendered":"https:\/\/cloudsave.app\/?p=4509"},"modified":"2026-06-15T14:03:44","modified_gmt":"2026-06-15T14:03:44","slug":"postgresql-wal-%e5%bd%92%e6%a1%a3-%e5%b8%b8%e8%a7%81%e9%99%b7%e9%98%b1%e4%b8%8e%e6%95%b0%e6%8d%ae%e4%b8%a2%e5%a4%b1%e9%a3%8e%e9%99%a9","status":"publish","type":"post","link":"https:\/\/cloudsave.app\/zh-hans\/knowledge-base\/postgresql-wal-%e5%bd%92%e6%a1%a3-%e5%b8%b8%e8%a7%81%e9%99%b7%e9%98%b1%e4%b8%8e%e6%95%b0%e6%8d%ae%e4%b8%a2%e5%a4%b1%e9%a3%8e%e9%99%a9\/","title":{"rendered":"PostgreSQL WAL \u5f52\u6863\uff1a\u5e38\u89c1\u9677\u9631\u4e0e\u6570\u636e\u4e22\u5931\u98ce\u9669"},"content":{"rendered":"<p>\u5bf9\u4e8e\u7ba1\u7406\u751f\u4ea7\u73af\u5883 PostgreSQL \u7684\u6570\u636e\u5e93\u7ba1\u7406\u5458 (DBA) \u548c DevOps \u5de5\u7a0b\u5e08\u800c\u8a00\uff0c\u5b9e\u73b0\u8fd1\u4e4e\u96f6\u7684\u6062\u590d\u70b9\u76ee\u6807 (RPO) \u662f\u4e00\u9879\u9996\u8981\u4efb\u52a1\u3002PostgreSQL \u707e\u96be\u6062\u590d\u548c\u65f6\u95f4\u70b9\u6062\u590d (PITR) \u80fd\u529b\u7684\u6838\u5fc3\u662f\u9884\u5199\u5f0f\u65e5\u5fd7 (WAL)\u3002\u867d\u7136 WAL \u901a\u8fc7\u5728\u5199\u5165\u6570\u636e\u6587\u4ef6\u4e4b\u524d\u8bb0\u5f55\u4e8b\u52a1\u6765\u786e\u4fdd ACID \u5408\u89c4\u6027\uff0c\u4f46 WAL <em>\u5f52\u6863<\/em>\u662f\u5c06\u8fd9\u4e9b\u65e5\u5fd7\u4fdd\u5b58\u4ee5\u7528\u4e8e\u957f\u671f\u5907\u4efd\u548c\u590d\u5236\u7684\u673a\u5236\u3002<\/p>\n<p>\u7136\u800c\uff0c\u914d\u7f6e WAL \u5f52\u6863\u5e76\u975e\u201c\u4e00\u52b3\u6c38\u9038\u201d\u7684\u64cd\u4f5c\u3002\u914d\u7f6e\u9519\u8bef\u3001\u9759\u9ed8\u5931\u8d25\u4ee5\u53ca\u5bf9\u67b6\u6784\u7684\u8bef\u89e3\u90fd\u53ef\u80fd\u5bfc\u81f4\u707e\u96be\u6027\u7684\u6570\u636e\u4e22\u5931\u3001\u8111\u88c2\u573a\u666f\u6216\u6574\u4e2a\u6570\u636e\u5e93\u4e2d\u65ad\u3002<\/p>\n<p>\u5728\u672c\u7efc\u5408\u6307\u5357\u4e2d\uff0c\u6211\u4eec\u5c06\u63a2\u8ba8 PostgreSQL WAL \u5f52\u6863\u7684\u67b6\u6784\uff0c\u8bc6\u522b\u5bfc\u81f4\u6570\u636e\u4e22\u5931\u7684\u6700\u5e38\u89c1\u9677\u9631\uff0c\u5e76\u6982\u8ff0\u751f\u4ea7\u7ea7\u7684\u6700\u4f73\u5b9e\u8df5\uff0c\u4ee5\u786e\u4fdd\u60a8\u7684\u6570\u636e\u5e93\u4fdd\u6301\u5f39\u6027\u3002<\/p>\n<h2>\u4e86\u89e3 PostgreSQL WAL \u67b6\u6784<\/h2>\n<p>\u5728\u6df1\u5165\u63a2\u8ba8\u9677\u9631\u4e4b\u524d\uff0c\u4e86\u89e3 PostgreSQL \u5982\u4f55\u5904\u7406\u4e8b\u52a1\u65e5\u5fd7\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<p>PostgreSQL \u5c06\u6240\u6709\u4fee\u6539\u5199\u5165\u4f4d\u4e8e <code>pg_wal<\/code> \u76ee\u5f55\uff0810 \u7248\u672c\u4e4b\u524d\u79f0\u4e3a <code>pg_xlog<\/code>\uff09\u4e2d\u7684 WAL \u6bb5\uff08\u9ed8\u8ba4\u4e3a 16MB \u6587\u4ef6\uff09\u3002\u6bcf\u4e2a\u4e8b\u52a1\u90fd\u6309\u987a\u5e8f\u8bb0\u5f55\uff0c\u5e76\u7531\u65e5\u5fd7\u5e8f\u5217\u53f7 (LSN) \u6807\u8bb0\u3002<\/p>\n<p>\u5f53 WAL \u6bb5\u586b\u6ee1\u65f6\uff0cPostgreSQL \u4f1a\u5207\u6362\u5230\u4e00\u4e2a\u65b0\u7684\u6bb5\u3002\u4e3a\u4e86\u9632\u6b62 <code>pg_wal<\/code> \u76ee\u5f55\u65e0\u9650\u589e\u957f\uff0cPostgreSQL \u4f1a\u5728\u4e0d\u518d\u9700\u8981\u8fd9\u4e9b\u65e7 WAL \u6bb5\u8fdb\u884c\u5d29\u6e83\u6062\u590d\u6216\u590d\u5236\u65f6\uff0c\u5bf9\u5176\u8fdb\u884c\u56de\u6536\u6216\u5220\u9664\u3002<\/p>\n<p><strong>WAL \u5f52\u6863<\/strong>\u4f1a\u62e6\u622a\u6b64\u56de\u6536\u8fc7\u7a0b\u3002\u5f53\u542f\u7528 <code>archive_mode<\/code> \u65f6\uff0cPostgreSQL \u4f1a\u6267\u884c\u7528\u6237\u5b9a\u4e49\u7684 <code>archive_command<\/code>\uff08\u6216\u5728 PostgreSQL 15+ \u4e2d\u4f7f\u7528 <code>archive_library<\/code>\uff09\uff0c\u5728\u5220\u9664\u6216\u8986\u76d6\u4e4b\u524d\u5c06\u5df2\u5b8c\u6210\u7684 WAL \u6bb5\u590d\u5236\u5230\u5b89\u5168\u7684\u8f85\u52a9\u4f4d\u7f6e\u3002<\/p>\n<p>\u8981\u6267\u884c\u65f6\u95f4\u70b9\u6062\u590d (PITR)\uff0c\u60a8\u9700\u8981\u4e24\u4e2a\u7ec4\u4ef6\uff1a<br \/>\n1. \u6709\u6548\u7684\u57fa\u7840\u5907\u4efd\u3002<br \/>\n2. \u4ece\u57fa\u7840\u5907\u4efd\u65f6\u95f4\u70b9\u5230\u76ee\u6807\u6062\u590d\u65f6\u95f4\u70b9\u4e4b\u95f4\u4e0d\u95f4\u65ad\u7684\u5f52\u6863 WAL \u6587\u4ef6\u94fe\u3002<\/p>\n<p>\u5982\u679c\u8be5 WAL \u94fe\u65ad\u88c2\uff0c\u60a8\u7684 PITR \u5c06\u4f1a\u5931\u8d25\u3002<\/p>\n<h2>\u4e3a\u751f\u4ea7\u73af\u5883\u914d\u7f6e WAL \u5f52\u6863<\/h2>\n<p>\u8981\u542f\u7528 WAL \u5f52\u6863\uff0c\u60a8\u5fc5\u987b\u4fee\u6539 <code>postgresql.conf<\/code> \u6587\u4ef6\u3002\u57fa\u672c\u914d\u7f6e\u9700\u8981\u8bbe\u7f6e <code>wal_level<\/code>\uff0c\u542f\u7528 <code>archive_mode<\/code>\uff0c\u5e76\u5b9a\u4e49 <code>archive_command<\/code>\u3002<\/p>\n<pre><code class=\"language-ini\"># postgresql.conf\nwal_level = replica             # \u5f52\u6863\u9700\u8981 'replica' \u6216 'logical'\narchive_mode = on               # \u542f\u7528\u5f52\u6863\u8fdb\u7a0b\narchive_command = 'test ! -f \/mnt\/nfs\/archive\/%f &amp;&amp; cp %p \/mnt\/nfs\/archive\/%f'\narchive_timeout = 600           # \u6bcf 10 \u5206\u949f\u5f3a\u5236\u8fdb\u884c\u4e00\u6b21 WAL \u5207\u6362\n<\/code><\/pre>\n<p>\u5728 <code>archive_command<\/code> \u4e2d\uff1a<br \/>\n* <code>%p<\/code> \u4ee3\u8868\u8981\u5f52\u6863\u7684 WAL \u6587\u4ef6\u7684\u5b8c\u6574\u8def\u5f84\u3002<br \/>\n* <code>%f<\/code> \u4ee3\u8868 WAL \u6587\u4ef6\u7684\u6587\u4ef6\u540d\u3002<\/p>\n<p>\u867d\u7136\u4e0a\u8ff0\u914d\u7f6e\u770b\u8d77\u6765\u5f88\u7b80\u5355\uff0c\u4f46\u5728\u4f01\u4e1a\u73af\u5883\u4e2d\u4f7f\u7528\u7b80\u5355\u7684 shell \u547d\u4ee4\u4f1a\u5e26\u6765\u91cd\u5927\u98ce\u9669\u3002<\/p>\n<h2>WAL \u5f52\u6863\u4e2d\u7684\u5e38\u89c1\u9677\u9631<\/h2>\n<h3>\u9677\u9631 1\uff1a<code>archive_command<\/code> \u7684\u201c\u9759\u9ed8\u6210\u529f\u201d<\/h3>\n<p>PostgreSQL \u5b8c\u5168\u4f9d\u8d56 <code>archive_command<\/code> \u7684\u9000\u51fa\u4ee3\u7801\u3002\u5982\u679c\u547d\u4ee4\u8fd4\u56de <code>0<\/code>\uff0cPostgreSQL \u4f1a\u8ba4\u4e3a WAL \u6587\u4ef6\u5df2\u5b89\u5168\u5f52\u6863\uff0c\u5e76\u7ee7\u7eed\u56de\u6536\u539f\u59cb\u6587\u4ef6\u3002<\/p>\n<p>\u4e00\u4e2a\u5e38\u89c1\u7684\u9519\u8bef\u662f\u4f7f\u7528\u5373\u4f7f\u6570\u636e\u672a\u5b89\u5168\u5237\u65b0\u5230\u6301\u4e45\u5b58\u50a8\u4e5f\u4f1a\u8fd4\u56de <code>0<\/code> \u7684\u547d\u4ee4\u3002\u4f8b\u5982\uff0c\u7b80\u5355\u7684 <code>cp<\/code> \u547d\u4ee4\u53ef\u80fd\u5728\u6570\u636e\u5230\u8fbe\u76ee\u6807\u670d\u52a1\u5668\u4e0a\u7684\u64cd\u4f5c\u7cfb\u7edf\u9875\u9762\u7f13\u5b58\u540e\u7acb\u5373\u8fd4\u56de\u6210\u529f\u3002\u5982\u679c\u76ee\u6807\u670d\u52a1\u5668\u5728\u7f13\u5b58\u5237\u65b0\u5230\u78c1\u76d8\u4e4b\u524d\u65ad\u7535\uff0cWAL \u6587\u4ef6\u5c31\u4f1a\u4e22\u5931\uff0c\u4f46 PostgreSQL \u5df2\u7ecf\u5220\u9664\u4e86\u5176\u672c\u5730\u526f\u672c\u3002<\/p>\n<p><strong>\u98ce\u9669\uff1a<\/strong> WAL \u94fe\u65ad\u88c2\u4e14\u65e0\u6cd5\u6267\u884c PITR\uff0c\u8fd9\u79cd\u60c5\u51b5\u901a\u5e38\u53ea\u5728\u707e\u96be\u6062\u590d\u573a\u666f\u4e2d\u624d\u4f1a\u88ab\u53d1\u73b0\u3002<\/p>\n<p><strong>\u7f13\u89e3\u63aa\u65bd\uff1a<\/strong> \u786e\u4fdd\u60a8\u7684\u5f52\u6863\u811a\u672c\u5f3a\u5236\u6267\u884c\u540c\u6b65\u5199\u5165\u3002\u5982\u679c\u4f7f\u7528\u6807\u51c6 shell \u547d\u4ee4\uff0c\u8bf7\u4f7f\u7528\u80fd\u4fdd\u8bc1\u6570\u636e\u5237\u65b0\u7684\u5de5\u5177\uff0c\u6216\u8005\u7f16\u5199\u4e00\u4e2a\u5728\u4f20\u8f93\u540e\u9a8c\u8bc1\u6587\u4ef6\u5927\u5c0f\u548c\u6821\u9a8c\u548c\u7684\u5305\u88c5\u811a\u672c\u3002<\/p>\n<h3>\u9677\u9631 2\uff1a<code>pg_wal<\/code> \u5206\u533a\u8017\u5c3d\uff08WAL \u81a8\u80c0\uff09<\/h3>\n<p>\u5982\u679c <code>archive_command<\/code> \u5931\u8d25\uff08\u8fd4\u56de\u975e\u96f6\u9000\u51fa\u4ee3\u7801\uff09\u2014\u2014\u7531\u4e8e\u7f51\u7edc\u4e2d\u65ad\u3001\u6743\u9650\u4e0d\u6b63\u786e\u6216\u76ee\u6807\u78c1\u76d8\u5df2\u6ee1\u2014\u2014PostgreSQL \u5c06\u4fdd\u7559 <code>pg_wal<\/code> \u76ee\u5f55\u4e2d\u7684 WAL \u6587\u4ef6\u5e76\u65e0\u9650\u671f\u91cd\u8bd5\u8be5\u547d\u4ee4\u3002<\/p>\n<p>\u867d\u7136\u8fd9\u901a\u8fc7\u4e0d\u5220\u9664\u672a\u5f52\u6863\u7684 WAL \u6765\u9632\u6b62\u6570\u636e\u4e22\u5931\uff0c\u4f46\u5b83\u5f15\u5165\u4e86\u4e25\u91cd\u7684\u53ef\u7528\u6027\u98ce\u9669\u3002\u5982\u679c <code>pg_wal<\/code> \u76ee\u5f55\u4f4d\u4e8e\u5df2\u6ee1\u81f3 100% \u7684\u5206\u533a\u4e0a\uff0cPostgreSQL \u5c06\u53d1\u51fa <code>PANIC<\/code> \u5e76\u5d29\u6e83\u3002\u5728\u6e05\u7406\u7a7a\u95f4\u4e4b\u524d\uff0c\u6570\u636e\u5e93\u5c06\u65e0\u6cd5\u518d\u6b21\u542f\u52a8\u3002<\/p>\n<h3>\u9677\u9631 3\uff1a\u57fa\u7840\u5907\u4efd\u4e0d\u5b8c\u6574<\/h3>\n<p>\u5982\u679c\u6ca1\u6709\u5907\u4efd\u8fc7\u7a0b\u4e2d\u751f\u6210\u7684 WAL \u6587\u4ef6\uff0c\u57fa\u7840\u5907\u4efd\u662f\u6beb\u65e0\u7528\u5904\u7684\u3002\u5982\u679c\u60a8\u8fdb\u884c\u6587\u4ef6\u7cfb\u7edf\u7ea7\u5feb\u7167\u6216\u4f7f\u7528 <code>pg_basebackup<\/code> \u800c\u4e0d\u6d41\u5f0f\u4f20\u8f93 WAL (<code>-X stream<\/code>)\uff0c\u5219\u5fc5\u987b\u786e\u4fdd\u5907\u4efd\u5f00\u59cb\u548c\u7ed3\u675f\u4e4b\u95f4\u751f\u6210\u7684 WAL \u6587\u4ef6\u5df2\u6210\u529f\u5f52\u6863\u3002<\/p>\n<p>\u5982\u679c\u60a8\u7684\u5f52\u6863\u7a0b\u5e8f\u6ede\u540e\u6216\u5931\u8d25\uff0c\u5e76\u4e14\u8fd9\u4e9b\u7279\u5b9a\u7684 WAL \u6587\u4ef6\u4e22\u5931\uff0c\u5219\u57fa\u7840\u5907\u4efd\u65e0\u6cd5\u6062\u590d\u5230\u4e00\u81f4\u72b6\u6001\u3002<\/p>\n<p><strong>\u98ce\u9669\uff1a<\/strong> \u57fa\u7840\u5907\u4efd\u635f\u574f\u6216\u65e0\u6cd5\u6062\u590d\u3002<\/p>\n<p><strong>\u7f13\u89e3\u63aa\u65bd\uff1a<\/strong> \u4f7f\u7528 <code>pg_basebackup -X stream<\/code> \u5c06\u5fc5\u8981\u7684 WAL \u6587\u4ef6\u5305\u542b\u5728\u5907\u4efd\u8d1f\u8f7d\u672c\u8eab\u4e2d\uff0c\u6216\u8005\u5229\u7528\u81ea\u52a8\u7ba1\u7406\u57fa\u7840\u5907\u4efd\u4e0e WAL \u6bb5\u4e4b\u95f4\u4f9d\u8d56\u5173\u7cfb\u7684\u4f01\u4e1a\u7ea7\u5907\u4efd\u89e3\u51b3\u65b9\u6848\u3002<\/p>\n<h3>\u9677\u9631 4\uff1a\u65f6\u95f4\u7ebf\u6df7\u4e71\u548c\u8111\u88c2\u573a\u666f<\/h3>\n<p>\u5f53\u5907\u7528\u670d\u52a1\u5668\u88ab\u63d0\u5347\u4e3a\u4e3b\u670d\u52a1\u5668\u65f6\uff0cPostgreSQL \u4f1a\u589e\u52a0\u201c\u65f6\u95f4\u7ebf ID\u201d\uff08WAL \u6587\u4ef6\u540d\u7684\u7b2c\u4e00\u90e8\u5206\uff0c\u4f8b\u5982 <code>0000000200000001000000A4<\/code>\uff09\u3002\u8fd9\u53ef\u4ee5\u9632\u6b62\u65b0\u7684\u4e3b\u670d\u52a1\u5668\u8986\u76d6\u65e7\u4e3b\u670d\u52a1\u5668\u7684 WAL \u5386\u53f2\u8bb0\u5f55\u3002<\/p>\n<p>\u7136\u800c\uff0c\u5982\u679c\u65e7\u7684\u4e3b\u670d\u52a1\u5668\u5728\u6ca1\u6709\u88ab\u6b63\u786e\u9694\u79bb\u7684\u60c5\u51b5\u4e0b\u610f\u5916\u542f\u52a8\uff08\u8111\u88c2\u573a\u666f\uff09\uff0c\u5b83\u53ef\u80fd\u4f1a\u5c1d\u8bd5\u4f7f\u7528\u65e7\u7684\u65f6\u95f4\u7ebf\u5c06 WAL \u6587\u4ef6\u63a8\u9001\u5230\u76f8\u540c\u7684\u5f52\u6863\u4f4d\u7f6e\u3002\u5982\u679c\u60a8\u7684 <code>archive_command<\/code> \u76f2\u76ee\u8986\u76d6\u6587\u4ef6\uff0c\u60a8\u53ef\u80fd\u4f1a\u635f\u574f\u5f52\u6863\u5b58\u50a8\u5e93\u3002<\/p>\n<p><strong>\u98ce\u9669\uff1a<\/strong> WAL \u6587\u4ef6\u88ab\u8986\u76d6\u3001\u5f52\u6863\u635f\u574f\u4ee5\u53ca\u6570\u636e\u5e93\u65e0\u6cd5\u6062\u590d\u3002<\/p>\n<p><strong>\u7f13\u89e3\u63aa\u65bd\uff1a<\/strong> \u60a8\u7684 <code>archive_command<\/code> <em>\u7edd\u4e0d\u80fd<\/em>\u8986\u76d6\u73b0\u6709\u6587\u4ef6\u3002\u8bf7\u6ce8\u610f\u5728\u524d\u9762\u7684\u57fa\u672c\u914d\u7f6e\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u4e86 <code>test ! -f \/mnt\/nfs\/archive\/%f<\/code> \u6765\u660e\u786e\u5728\u6587\u4ef6\u5df2\u5b58\u5728\u65f6\u62a5\u9519\u3002<\/p>\n<h2>\u7f13\u89e3\u6570\u636e\u4e22\u5931\u98ce\u9669\uff1a\u751f\u4ea7\u6700\u4f73\u5b9e\u8df5<\/h2>\n<p>\u4e3a\u4e86\u52a0\u5f3a\u60a8\u7684 PostgreSQL \u5f52\u6863\u7b56\u7565\uff0c\u8bf7\u5b9e\u65bd\u4ee5\u4e0b\u6700\u4f73\u5b9e\u8df5\u3002<\/p>\n<h3>1. \u539f\u751f\u76d1\u63a7\u5f52\u6863\u8fdb\u7a0b<\/h3>\n<p>PostgreSQL \u63d0\u4f9b\u4e86\u4e00\u4e2a\u5185\u7f6e\u89c6\u56fe <code>pg_stat_archiver<\/code>\uff0c\u7528\u4e8e\u8ddf\u8e2a\u5f52\u6863\u8fc7\u7a0b\u7684\u6210\u529f\u548c\u5931\u8d25\u3002\u60a8\u5e94\u8be5\u5c06\u6b64\u89c6\u56fe\u96c6\u6210\u5230\u60a8\u7684\u53ef\u89c2\u6d4b\u6027\u5806\u6808\uff08\u4f8b\u5982 Prometheus\u3001Datadog \u6216 Zabbix\uff09\u4e2d\u3002<\/p>\n<pre><code class=\"language-sql\">SELECT \n    archived_count,\n    last_archived_wal,\n    last_archived_time,\n    failed_count,\n    last_failed_wal,\n    last_failed_time,\n    stats_reset\nFROM pg_stat_archiver;\n<\/code><\/pre>\n<p><strong>\u9700\u8981\u914d\u7f6e\u7684\u544a\u8b66\u9608\u503c\uff1a<\/strong><br \/>\n* \u5982\u679c <code>failed_count<\/code> \u589e\u52a0\uff0c\u5219\u53d1\u51fa\u544a\u8b66\u3002<br \/>\n* \u5982\u679c <code>now()<\/code> \u548c <code>last_archived_time<\/code> \u4e4b\u95f4\u7684\u65f6\u95f4\u5dee\u8d85\u8fc7\u60a8\u7684 RPO \u9608\u503c\uff08\u4f8b\u5982 15 \u5206\u949f\uff09\uff0c\u5219\u53d1\u51fa\u544a\u8b66\uff0c\u540c\u65f6\u8bf7\u8bb0\u4f4f\uff0c\u9664\u975e\u8bbe\u7f6e\u4e86 <code>archive_timeout<\/code>\uff0c\u5426\u5219\u4f4e\u6d41\u91cf\u6570\u636e\u5e93\u53ef\u80fd\u4f1a\u81ea\u7136\u51fa\u73b0\u5ef6\u8fdf\u3002<\/p>\n<h3>2. \u5229\u7528 <code>archive_timeout<\/code><\/h3>\n<p>\u5728\u5199\u5165\u91cf\u8f83\u5c0f\u7684\u6570\u636e\u5e93\u4e2d\uff0c16MB \u7684 WAL \u6587\u4ef6\u53ef\u80fd\u9700\u8981\u6570\u5c0f\u65f6\u624d\u80fd\u586b\u6ee1\u3002\u5728\u586b\u6ee1\u4e4b\u524d\uff0c\u5b83\u4e0d\u4f1a\u88ab\u5f52\u6863\u3002\u5982\u679c\u670d\u52a1\u5668\u5d29\u6e83\u4e14\u672c\u5730\u78c1\u76d8\u4e22\u5931\uff0c\u60a8\u5c06\u4e22\u5931\u6570\u5c0f\u65f6\u7684\u4e8b\u52a1\u3002<\/p>\n<p>\u8bbe\u7f6e <code>archive_timeout = 600<\/code>\uff0810 \u5206\u949f\uff09\u4f1a\u5f3a\u5236 PostgreSQL \u5207\u6362\u5230\u65b0\u7684 WAL \u6587\u4ef6\u5e76\u5f52\u6863\u5f53\u524d\u6587\u4ef6\uff0c\u5373\u4f7f\u5b83\u672a\u6ee1\u3002\u8fd9\u4fdd\u8bc1\u4e86\u60a8\u7684 RPO \u4e0d\u4f1a\u8d85\u8fc7 10 \u5206\u949f\uff0c\u4ee3\u4ef7\u662f\u7531\u4e8e\u90e8\u5206\u586b\u5145\u7684 WAL \u6587\u4ef6\u5bfc\u81f4\u5b58\u50a8\u4f7f\u7528\u91cf\u7565\u6709\u589e\u52a0\u3002<\/p>\n<h3>3. \u8fc1\u79fb\u5230 <code>archive_library<\/code> (PostgreSQL 15+)<\/h3>\n<p>\u8fc7\u53bb\uff0c<code>archive_command<\/code> \u4f1a\u4e3a\u6bcf\u4e2a WAL \u6587\u4ef6\u751f\u6210\u4e00\u4e2a\u65b0\u7684 shell \u8fdb\u7a0b\u3002\u5728\u6bcf\u5206\u949f\u751f\u6210\u6570\u767e\u4e2a WAL \u6587\u4ef6\u7684\u9ad8\u541e\u5410\u91cf\u73af\u5883\u4e2d\uff0cfork shell \u8fdb\u7a0b\u7684\u5f00\u9500\u4f1a\u6210\u4e3a\u6027\u80fd\u74f6\u9888\u3002<\/p>\n<p>PostgreSQL 15 \u5f15\u5165\u4e86 <code>archive_library<\/code> \u53c2\u6570\uff0c\u5141\u8bb8\u901a\u8fc7\u52a8\u6001\u52a0\u8f7d\u7684 C \u6a21\u5757\u5904\u7406 WAL \u5f52\u6863\u3002\u8fd9\u6d88\u9664\u4e86 shell fork \u5f00\u9500\uff0c\u5e76\u63d0\u4f9b\u4e86\u4e00\u79cd\u66f4\u5f3a\u5927\u3001\u9ad8\u6027\u80fd\u7684\u5f52\u6863\u673a\u5236\u3002\u5982\u679c\u60a8\u4f7f\u7528\u7684\u662f PostgreSQL 15 \u6216\u66f4\u9ad8\u7248\u672c\uff0c\u8bf7\u5bfb\u627e\u652f\u6301\u81ea\u5b9a\u4e49\u5f52\u6863\u6a21\u5757\u7684\u5907\u4efd\u5de5\u5177\u3002<\/p>\n<h3>4. \u5b9a\u671f\u6d4b\u8bd5\u65f6\u95f4\u70b9\u6062\u590d<\/h3>\n<p>\u672a\u7ecf\u6d4b\u8bd5\u7684\u5907\u4efd\u4e0d\u662f\u5907\u4efd\uff0c\u800c\u662f\u4e00\u79cd\u613f\u671b\u3002\u9a8c\u8bc1\u60a8\u7684 WAL \u5f52\u6863\u662f\u5426\u6b63\u5e38\u5de5\u4f5c\u3001WAL \u94fe\u662f\u5426\u5b8c\u6574\u4ee5\u53ca\u57fa\u7840\u5907\u4efd\u662f\u5426\u4e00\u81f4\u7684\u552f\u4e00\u65b9\u6cd5\u662f\u6267\u884c\u5e38\u89c4\u7684\u81ea\u52a8\u5316 PITR \u6d4b\u8bd5\u3002<\/p>\n<p>\u542f\u52a8\u4e00\u4e2a\u4e34\u65f6\u5b9e\u4f8b\uff0c\u6062\u590d\u57fa\u7840\u5907\u4efd\uff0c\u914d\u7f6e <code>restore_command<\/code> \u4ece\u60a8\u7684\u5f52\u6863\u4e2d\u63d0\u53d6\u6570\u636e\uff0c\u5e76\u6062\u590d\u5230\u7279\u5b9a\u7684\u65f6\u95f4\u6233\u3002\u9a8c\u8bc1\u6570\u636e\u5e93\u662f\u5426\u8fbe\u5230\u4e00\u81f4\u72b6\u6001\u5e76\u53ef\u4ee5\u63a5\u53d7\u8fde\u63a5\u3002<\/p>\n<h2>\u4f7f\u7528 CloudSave \u8fdb\u884c\u4f01\u4e1a\u7ea7\u5907\u4efd\u4e0e\u6062\u590d<\/h2>\n<p>\u7ba1\u7406\u7528\u4e8e <code>archive_command<\/code> \u7684\u81ea\u5b9a\u4e49 shell \u811a\u672c\u3001\u5904\u7406 WAL \u91cd\u590d\u6570\u636e\u5220\u9664\u4ee5\u53ca\u786e\u4fdd\u4e8b\u52a1\u65e5\u5fd7\u7684\u5b89\u5168\u5f02\u5730\u5b58\u50a8\uff0c\u5f88\u5feb\u4f1a\u6210\u4e3a IT \u56e2\u961f\u7684\u64cd\u4f5c\u8d1f\u62c5\u3002<\/p>\n<p>\u8fd9\u5c31\u662f CloudSave \u4e3a\u4f01\u4e1a\u7ea7 PostgreSQL \u73af\u5883\u63d0\u4f9b\u5de8\u5927\u4ef7\u503c\u7684\u5730\u65b9\u3002CloudSave \u76f4\u63a5\u4e0e PostgreSQL \u7684\u539f\u751f\u5907\u4efd\u548c WAL \u5f52\u6863 API \u96c6\u6210\uff0c\u4ee5\u6d88\u9664\u4e0a\u8ff0\u624b\u52a8\u64cd\u4f5c\u7684\u9677\u9631\u3002<\/p>\n<p>CloudSave \u4e0d\u518d\u9700\u8981\u7f16\u5199\u8106\u5f31\u7684 bash \u811a\u672c\uff0c\u800c\u662f\u63d0\u4f9b\u4e86\u4e00\u79cd\u5f3a\u5927\u7684\u3001\u57fa\u4e8e\u4ee3\u7406\u6216\u65e0\u4ee3\u7406\u7684\u96c6\u6210\uff0c\u80fd\u591f\uff1a<br \/>\n* <strong>\u4fdd\u8bc1\u4ea4\u4ed8\uff1a<\/strong> \u7528\u7ecf\u8fc7\u9a8c\u8bc1\u7684\u3001\u6821\u9a8c\u548c\u786e\u8ba4\u7684\u4f20\u8f93\u65b9\u5f0f\u53d6\u4ee3\u6807\u51c6 shell \u547d\u4ee4\uff0c\u786e\u4fdd\u6570\u636e\u5b89\u5168\u4f20\u8f93\u81f3\u5f02\u5730\u6216\u4e91\u5b58\u50a8\u3002<br \/>\n* <strong>\u9632\u6b62 WAL \u81a8\u80c0\uff1a<\/strong> \u4e3b\u52a8\u76d1\u63a7 <code>pg_wal<\/code> \u76ee\u5f55\uff0c\u5e76\u5728\u5206\u533a\u8017\u5c3d\u4e4b\u524d\u5411\u7ba1\u7406\u5458\u53d1\u51fa\u544a\u8b66\u3002<br \/>\n* <strong>\u81ea\u52a8\u5316 PITR\uff1a<\/strong> \u901a\u8fc7\u76f4\u89c2\u7684\u754c\u9762\u7b80\u5316\u65f6\u95f4\u70b9\u6062\u590d\u3002\u60a8\u53ea\u9700\u9009\u62e9\u60f3\u8981\u6062\u590d\u5230\u7684\u786e\u5207\u5206\u949f\uff0cCloudSave \u5c31\u4f1a\u81ea\u52a8\u68c0\u7d22\u6b63\u786e\u7684\u57fa\u7840\u5907\u4efd\uff0c\u5e76\u6d41\u5f0f\u4f20\u8f93\u8fbe\u5230\u8be5\u72b6\u6001\u6240\u9700\u7684\u7cbe\u786e WAL \u6587\u4ef6\u5e8f\u5217\u3002<br \/>\n* <strong>\u5904\u7406\u65f6\u95f4\u7ebf\uff1a<\/strong> \u667a\u80fd\u7ba1\u7406 PostgreSQL \u65f6\u95f4\u7ebf\u5386\u53f2\u8bb0\u5f55\uff0c\u786e\u4fdd\u6545\u969c\u8f6c\u79fb\u548c\u8111\u88c2\u573a\u666f\u4e0d\u4f1a\u635f\u574f\u60a8\u7684\u5907\u4efd\u5b58\u50a8\u5e93\u3002<\/p>\n<p>\u901a\u8fc7\u5c06 WAL \u7ba1\u7406\u7684\u7e41\u91cd\u5de5\u4f5c\u5378\u8f7d\u7ed9 CloudSave\uff0cDBA \u53ef\u4ee5\u4e13\u6ce8\u4e8e\u67e5\u8be2\u4f18\u5316\u548c\u6570\u636e\u5e93\u6027\u80fd\uff0c\u56e0\u4e3a\u4ed6\u4eec\u77e5\u9053\u5176 RPO \u548c RTO SLA \u53d7\u5230\u4f01\u4e1a\u7ea7\u5e73\u53f0\u7684\u4fdd\u62a4\u3002<\/p>\n<h2>\u7ed3\u8bba<\/h2>\n<p>PostgreSQL WAL \u5f52\u6863\u662f\u6570\u636e\u5e93\u707e\u96be\u6062\u590d\u7684\u57fa\u77f3\u3002\u867d\u7136\u5c06\u6587\u4ef6\u4ece\u4e00\u4e2a\u76ee\u5f55\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u76ee\u5f55\u7684\u6982\u5ff5\u770b\u8d77\u6765\u5f88\u7b80\u5355\uff0c\u4f46\u8fb9\u7f18\u60c5\u51b5\uff08\u9759\u9ed8\u5931\u8d25\u3001\u78c1\u76d8\u8017\u5c3d\u548c\u65f6\u95f4\u7ebf\u5206\u6b67\uff09\u5bf9\u6570\u636e\u5b8c\u6574\u6027\u6784\u6210\u4e86\u4e25\u91cd\u98ce\u9669\u3002<\/p>\n<p>\u901a\u8fc7\u4e86\u89e3 <code>pg_wal<\/code> \u7684\u67b6\u6784\uff0c\u4e25\u683c\u907f\u514d\u7834\u574f\u6027\u7684 <code>archive_command<\/code> \u914d\u7f6e\uff0c\u76d1\u63a7 <code>pg_stat_archiver<\/code>\uff0c\u5e76\u5229\u7528\u50cf CloudSave \u8fd9\u6837\u7684\u4f01\u4e1a\u7ea7\u5907\u4efd\u5e73\u53f0\uff0c\u60a8\u53ef\u4ee5\u6784\u5efa\u4e00\u4e2a\u5177\u6709\u5f39\u6027\u7684 PostgreSQL \u57fa\u7840\u8bbe\u65bd\uff0c\u80fd\u591f\u5728\u4e0d\u4e22\u5931\u4efb\u4f55\u5df2\u63d0\u4ea4\u4e8b\u52a1\u7684\u60c5\u51b5\u4e0b\uff0c\u4ece\u786c\u4ef6\u6545\u969c\u3001\u4eba\u4e3a\u9519\u8bef\u548c\u707e\u96be\u6027\u4e2d\u65ad\u4e2d\u6062\u590d\u3002<\/p>\n<blockquote>\n<p>\u4e86\u89e3\u5bfc\u81f4\u6570\u636e\u4e22\u5931\u7684 PostgreSQL WAL \u5f52\u6863\u5e38\u89c1\u9677\u9631\u3002\u5b66\u4e60\u4e13\u5bb6 DBA \u7684\u6700\u4f73\u5b9e\u8df5\u3001\u914d\u7f6e\u6280\u5de7\uff0c\u4ee5\u53ca\u5982\u4f55\u4e3a\u4f01\u4e1a\u6570\u636e\u5e93\u786e\u4fdd\u53ef\u9760\u7684\u65f6\u95f4\u70b9\u6062\u590d (PITR)\u3002<\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>**<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rank_math_title":"PostgreSQL WAL Archiving: Pitfalls & Data Loss Risks","rank_math_description":"**","rank_math_focus_keyword":"postgresql wal 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