{"id":6103,"date":"2026-06-18T12:21:20","date_gmt":"2026-06-18T12:21:20","guid":{"rendered":"https:\/\/cloudsave.app\/knowledge-base\/calculate-rto-and-rpo-databases\/"},"modified":"2026-06-18T12:34:40","modified_gmt":"2026-06-18T12:34:40","slug":"%e7%82%ba%e9%97%9c%e9%8d%b5%e4%bb%bb%e5%8b%99%e8%b3%87%e6%96%99%e5%ba%ab%e8%a8%88%e7%ae%97-rto-%e8%88%87-rpo-dba-%e6%8c%87%e5%8d%97","status":"publish","type":"post","link":"https:\/\/cloudsave.app\/zh-hant\/knowledge-base\/%e7%82%ba%e9%97%9c%e9%8d%b5%e4%bb%bb%e5%8b%99%e8%b3%87%e6%96%99%e5%ba%ab%e8%a8%88%e7%ae%97-rto-%e8%88%87-rpo-dba-%e6%8c%87%e5%8d%97\/","title":{"rendered":"\u70ba\u95dc\u9375\u4efb\u52d9\u8cc7\u6599\u5eab\u8a08\u7b97 RTO \u8207 RPO\uff1aDBA \u6307\u5357"},"content":{"rendered":"<p>\u5c0d\u65bc DevOps \u5de5\u7a0b\u5e2b\u3001\u8cc7\u6599\u5eab\u7ba1\u7406\u54e1 (DBA) \u548c IT \u7cfb\u7d71\u67b6\u69cb\u5e2b\u800c\u8a00\uff0c\u5fa9\u539f\u6642\u9593\u76ee\u6a19 (RTO) \u548c\u5fa9\u539f\u9ede\u76ee\u6a19 (RPO) \u4e0d\u50c5\u50c5\u662f\u696d\u52d9\u9023\u7e8c\u6027\u7684\u6d41\u884c\u8a9e\uff0c\u5b83\u5011\u66f4\u662f\u56b4\u683c\u7684\u5de5\u7a0b\u9650\u5236\u3002\u5728\u7ba1\u7406\u95dc\u9375\u4efb\u52d9\u8cc7\u6599\u5eab\u6642\uff0c\u82e5\u672a\u80fd\u6e96\u78ba\u8a08\u7b97\u3001\u898f\u5283\u67b6\u69cb\u4e26\u9a57\u8b49\u9019\u4e9b\u6307\u6a19\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u707d\u96e3\u6027\u7684\u8cc7\u6599\u907a\u5931\u548c\u9577\u6642\u9593\u7684\u505c\u6a5f\u3002<\/p>\n<p>\u5728\u73fe\u4ee3\u4f01\u696d\u74b0\u5883\u4e2d\uff0c\u8a08\u7b97 RTO \u548c RPO \u9700\u8981\u5c0d\u8cc7\u6599\u5eab\u5167\u90e8\u6a5f\u5236\u3001\u5132\u5b58 I\/O\u3001\u7db2\u8def\u541e\u5410\u91cf\u548c\u4ea4\u6613\u65e5\u8a8c\u6a5f\u5236\u6709\u6df1\u5165\u7684\u4e86\u89e3\u3002\u672c\u6307\u5357\u63a2\u8a0e\u4e86\u7528\u65bc\u8a08\u7b97\u3001\u6e2c\u8a66\u548c\u512a\u5316\u751f\u7522\u8cc7\u6599\u5eab\u7cfb\u7d71 RTO \u548c RPO \u7684\u6280\u8853\u65b9\u6cd5\u3002<\/p>\n<h2>\u89e3\u69cb\u8cc7\u6599\u5eab\u7cfb\u7d71\u4e2d\u7684 RPO (\u5fa9\u539f\u9ede\u76ee\u6a19)<\/h2>\n<p>RPO \u5b9a\u7fa9\u4e86\u4ee5\u6642\u9593\u8861\u91cf\u7684\u6700\u5927\u53ef\u63a5\u53d7\u8cc7\u6599\u907a\u5931\u91cf\u3002\u5982\u679c\u60a8\u7684 RPO \u70ba 15 \u5206\u9418\uff0c\u9019\u610f\u5473\u8457\u82e5\u5728\u4e2d\u5348 12:00 \u767c\u751f\u707d\u96e3\uff0c\u60a8\u5fc5\u9808\u80fd\u5920\u5fa9\u539f\u81f3\u5c11\u5230\u4e0a\u5348 11:45 \u70ba\u6b62\u7684\u6240\u6709\u5df2\u63d0\u4ea4\u4ea4\u6613\u3002<\/p>\n<p>\u5c0d\u65bc\u8cc7\u6599\u5eab\u800c\u8a00\uff0cRPO \u53d6\u6c7a\u65bc\u60a8\u7684\u4ea4\u6613\u65e5\u8a8c\u7ba1\u7406\u7b56\u7565\uff08PostgreSQL \u4e2d\u7684 WAL\u3001Oracle \u4e2d\u7684\u91cd\u505a\u65e5\u8a8c (Redo Logs)\u3001SQL Server \u4e2d\u7684\u4ea4\u6613\u65e5\u8a8c\uff09\u3002<\/p>\n<h3>\u8cc7\u6599\u907a\u5931\u8207\u65e5\u8a8c\u751f\u6210\u7684\u6a5f\u5236<\/h3>\n<p>\u8981\u8a08\u7b97\u53ef\u5be6\u73fe\u7684 RPO\uff0c\u60a8\u5fc5\u9808\u5148\u4e86\u89e3\u8cc7\u6599\u5eab\u7684\u4ea4\u6613\u65e5\u8a8c\u751f\u6210\u901f\u7387\u3002\u5982\u679c\u60a8\u6bcf 15 \u5206\u9418\u5c07\u65e5\u8a8c\u50b3\u8f38\u5230\u5099\u4efd\u5132\u5b58\u5eab\uff0c\u4f46\u60a8\u7684\u7db2\u8def\u7121\u6cd5\u5728\u8a72\u6642\u9593\u7a97\u53e3\u5167\u50b3\u8f38 15 \u5206\u9418\u7684\u65e5\u8a8c\u91cf\uff0c\u90a3\u9ebc\u60a8\u7684\u5be6\u969b RPO \u5c07\u6703\u6301\u7e8c\u60e1\u5316\u3002<\/p>\n<p>\u60a8\u53ef\u4ee5\u4f7f\u7528\u539f\u751f SQL \u6307\u4ee4\u4f86\u5efa\u7acb\u65e5\u8a8c\u751f\u6210\u901f\u7387\u7684\u57fa\u6e96\u3002\u4f8b\u5982\uff0c\u5728 PostgreSQL (10 \u7248\u4ee5\u4e0a) \u4e2d\uff0c\u60a8\u53ef\u4ee5\u6e2c\u91cf\u7279\u5b9a\u9593\u9694\u5167\u7684\u9810\u5beb\u5f0f\u65e5\u8a8c (WAL) \u751f\u6210\u901f\u7387\uff1a<\/p>\n<pre><code class=\"language-sql\">-- \u5728 T=0 \u6642\u57f7\u884c\u6b64\u6307\u4ee4\nSELECT pg_current_wal_lsn() AS start_lsn;\n\n-- \u7cbe\u78ba\u7b49\u5f85 5 \u5206\u9418 (300 \u79d2)\uff0c\u7136\u5f8c\u57f7\u884c\uff1a\nSELECT pg_current_wal_lsn() AS end_lsn,\n       pg_size_pretty(pg_wal_lsn_diff(pg_current_wal_lsn(), 'START_LSN_VALUE')) AS wal_generated_size,\n       pg_wal_lsn_diff(pg_current_wal_lsn(), 'START_LSN_VALUE') \/ 300 AS bytes_per_second;\n<\/code><\/pre>\n<p>\u5982\u679c\u6b64\u67e5\u8a62\u986f\u793a\u60a8\u5728\u5c16\u5cf0\u8ca0\u8f09\u671f\u9593\u7522\u751f\u4e86 50 MB\/s \u7684 WAL \u8cc7\u6599\uff0c\u90a3\u9ebc 15 \u5206\u9418\u7684 RPO \u9700\u8981\u5c07 45 GB \u7684\u65e5\u8a8c\u8cc7\u6599\u50b3\u8f38\u5230\u60a8\u7684\u5099\u4efd\u5132\u5b58\u7a7a\u9593\u3002\u60a8\u7684\u7db2\u8def\u548c\u5132\u5b58\u76ee\u6a19\u5fc5\u9808\u652f\u63f4\u8d85\u904e 50 MB\/s \u7684\u6301\u7e8c\u5beb\u5165\u901f\u5ea6\uff0c\u624d\u80fd\u7dad\u6301\u6b64 RPO\u3002<\/p>\n<h3>\u540c\u6b65\u8207\u975e\u540c\u6b65\u8907\u88fd\u7684\u5f71\u97ff<\/h3>\n<p>\u8a31\u591a DBA \u4f9d\u8cf4\u9ad8\u53ef\u7528\u6027 (HA) \u8907\u88fd\u4f86\u6eff\u8db3 RPO\u3002\u7136\u800c\uff0c\u8907\u88fd\u4e26\u975e\u5099\u4efd\u3002\u522a\u9664\u8cc7\u6599\u8868 (<code>DROP TABLE users;<\/code>) \u7684\u52d5\u4f5c\u6703\u7acb\u5373\u88ab\u8907\u88fd\u3002<\/p>\n<p>\u7576\u4f7f\u7528\u8907\u88fd\u9032\u884c\u707d\u96e3\u5fa9\u539f (DR) \u6642\uff0c\u8907\u88fd\u6a21\u5f0f\u6703\u76f4\u63a5\u5f71\u97ff RPO\uff1a<br \/>\n*   <strong>\u540c\u6b65\u8907\u88fd\uff1a<\/strong> \u4fdd\u8b49 RPO \u70ba\u96f6 (RPO=0)\u3002\u4e3b\u8cc7\u6599\u5eab\u5728\u5099\u7528\u8cc7\u6599\u5eab\u78ba\u8a8d\u63a5\u6536\u4e4b\u524d\uff0c\u4e0d\u6703\u63d0\u4ea4\u4ea4\u6613\u3002\u5176\u4ee3\u50f9\u662f\u4e3b\u8cc7\u6599\u5eab\u5beb\u5165\u64cd\u4f5c\u7684\u5ef6\u9072\u589e\u52a0\u3002<br \/>\n*   <strong>\u975e\u540c\u6b65\u8907\u88fd\uff1a<\/strong> \u6703\u5f15\u5165\u8907\u88fd\u5ef6\u9072\u3002\u60a8\u7684 RPO \u5be6\u969b\u4e0a\u7b49\u65bc\u60a8\u76ee\u524d\u7684\u8907\u88fd\u5ef6\u9072\u6642\u9593\u3002<\/p>\n<p>\u82e5\u8981\u76e3\u63a7 PostgreSQL \u4e2d\u7684\u975e\u540c\u6b65\u8907\u88fd\u5ef6\u9072\uff0c\u8acb\u4f7f\u7528\uff1a<\/p>\n<pre><code class=\"language-sql\">SELECT application_name,\n       client_addr,\n       state,\n       sync_state,\n       pg_wal_lsn_diff(pg_current_wal_lsn(), replay_lsn) AS replication_lag_bytes\nFROM pg_stat_replication;\n<\/code><\/pre>\n<h2>\u89e3\u69cb\u5927\u578b\u8cc7\u6599\u5eab\u7684 RTO (\u5fa9\u539f\u6642\u9593\u76ee\u6a19)<\/h2>\n<p>RTO \u662f\u53ef\u5bb9\u5fcd\u7684\u6700\u5927\u505c\u6a5f\u6301\u7e8c\u6642\u9593\u3002\u8a08\u7b97\u8cc7\u6599\u5eab RTO \u4e4b\u6240\u4ee5\u6975\u5176\u8907\u96dc\uff0c\u662f\u56e0\u70ba\u5b83\u4e0d\u50c5\u50c5\u662f\u5c07\u6a94\u6848\u8907\u88fd\u56de\u4f3a\u670d\u5668\u6240\u9700\u7684\u6642\u9593\u3002<\/p>\n<h3>RTO \u8a08\u7b97\u7684\u6578\u5b78\u6a21\u578b<\/h3>\n<p>\u4e00\u500b\u5be6\u969b\u7684\u8cc7\u6599\u5eab RTO \u8a08\u7b97\u5fc5\u9808\u8003\u616e\u56db\u500b\u4e0d\u540c\u7684\u968e\u6bb5\uff1a<\/p>\n<p><strong>RTO = T(\u57fa\u790e\u8a2d\u65bd) + T(\u50b3\u8f38) + T(\u9084\u539f) + T(\u5fa9\u539f)<\/strong><\/p>\n<ol>\n<li><strong>T(\u57fa\u790e\u8a2d\u65bd) &#8211; \u57fa\u790e\u8a2d\u65bd\u914d\u7f6e\uff1a<\/strong> \u555f\u52d5\u66ff\u63db\u904b\u7b97\u548c\u5132\u5b58\u8cc7\u6e90\u7684\u6642\u9593\u3002\uff08\u82e5\u6709\u9810\u5148\u914d\u7f6e\u7684 DR \u7ad9\u9ede\u6216\u57fa\u790e\u8a2d\u65bd\u5373\u7a0b\u5f0f\u78bc (IaC) \u7ba1\u7dda\uff0c\u6b64\u6642\u9593\u53ef\u8da8\u8fd1\u65bc\u96f6\uff09\u3002<\/li>\n<li><strong>T(\u50b3\u8f38) &#8211; \u8cc7\u6599\u50b3\u8f38\uff1a<\/strong> \u5c07\u5099\u4efd\u8ca0\u8f09\u5f9e\u5132\u5b58\u5eab\u79fb\u52d5\u5230\u8cc7\u6599\u5eab\u4f3a\u670d\u5668\u7684\u6642\u9593\u3002<\/li>\n<li><strong>T(\u9084\u539f) &#8211; \u5be6\u9ad4\u9084\u539f\uff1a<\/strong> \u5c07\u8cc7\u6599\u6a94\u6848\u5beb\u5165\u76ee\u6a19\u78c1\u789f\u7684\u6642\u9593\u3002<\/li>\n<li><strong>T(\u5fa9\u539f) &#8211; \u8cc7\u6599\u5eab\u5d29\u6f70\u5fa9\u539f\uff1a<\/strong> \u8cc7\u6599\u5eab\u5f15\u64ce\u91cd\u64ad\u4ea4\u6613\u65e5\u8a8c\u3001\u5411\u524d\u6efe\u52d5\u5df2\u63d0\u4ea4\u4ea4\u6613\u4e26\u56de\u6efe\u672a\u63d0\u4ea4\u4ea4\u6613\u7684\u6642\u9593\u3002<\/li>\n<\/ol>\n<h3>\u8a08\u7b97\u50b3\u8f38\u8207\u9084\u539f\u6642\u9593<\/h3>\n<p>\u8981\u8a08\u7b97 <code>T(\u50b3\u8f38)<\/code> \u548c <code>T(\u9084\u539f)<\/code>\uff0c\u60a8\u5fc5\u9808\u5efa\u7acb\u7db2\u8def\u983b\u5bec\u548c\u78c1\u789f IOPS\/\u541e\u5410\u91cf\u7684\u57fa\u6e96\u3002\u4e0d\u8981\u4f9d\u8cf4\u7406\u8ad6\u4e0a\u7684\u6700\u5927\u503c\uff1b\u8acb\u6e2c\u8a66\u60a8\u7684\u5be6\u969b\u57fa\u790e\u8a2d\u65bd\u3002<\/p>\n<p>\u4f7f\u7528 <code>iperf3<\/code> \u6e2c\u8a66\u5099\u4efd\u5132\u5b58\u5eab\u8207\u8cc7\u6599\u5eab\u4f3a\u670d\u5668\u4e4b\u9593\u7684\u7db2\u8def\u541e\u5410\u91cf\uff1a<\/p>\n<pre><code class=\"language-bash\"># \u5728\u5099\u4efd\u5132\u5b58\u5eab (\u4f3a\u670d\u5668\u7aef)\niperf3 -s\n\n# \u5728\u8cc7\u6599\u5eab\u4f3a\u670d\u5668 (\u5ba2\u6236\u7aef)\niperf3 -c &lt;backup_repo_ip&gt; -t 60 -P 4\n<\/code><\/pre>\n<p>\u4f7f\u7528 <code>fio<\/code> \u6e2c\u8a66\u8cc7\u6599\u5eab\u5132\u5b58\u78c1\u789f\u5340\u7684\u9806\u5e8f\u5beb\u5165\u6548\u80fd\uff0c\u6a21\u64ec\u8cc7\u6599\u5eab\u9084\u539f\u64cd\u4f5c\uff1a<\/p>\n<pre><code class=\"language-bash\">fio --name=restore_sim --ioengine=libaio --rw=write --bs=1M --size=10G --numjobs=4 --iodepth=32 --direct=1 --filename=\/var\/lib\/postgresql\/data\/testfile\n<\/code><\/pre>\n<p>\u5982\u679c\u60a8\u7684\u8cc7\u6599\u5eab\u5927\u5c0f\u70ba 5 TB\uff0c\u4e14 <code>fio<\/code> \u6e2c\u8a66\u986f\u793a\u6700\u5927\u6301\u7e8c\u5beb\u5165\u901f\u5ea6\u70ba 500 MB\/s\uff0c\u5247\u60a8\u7684 <code>T(\u9084\u539f)<\/code> \u7d55\u5c0d\u6700\u5c0f\u503c\u7d04\u70ba 2.8 \u5c0f\u6642\u3002\u5982\u679c\u60a8\u7684\u696d\u52d9 SLA \u8981\u6c42 1 \u5c0f\u6642\u7684 RTO\uff0c\u50b3\u7d71\u7684\u4e32\u6d41\u9084\u539f\u5c07\u6703\u5931\u6557\u3002\u60a8\u5fc5\u9808\u5c07\u67b6\u69cb\u8f49\u5411\u5132\u5b58\u5c64\u7d1a\u5feb\u7167\u6216\u5340\u584a\u5c64\u7d1a\u8907\u88fd\u3002<\/p>\n<h3>\u96b1\u85cf\u7684\u9677\u9631\uff1aT(\u5fa9\u539f)<\/h3>\n<p>\u6700\u5e38\u88ab\u4f4e\u4f30\u7684\u8b8a\u6578\u662f <code>T(\u5fa9\u539f)<\/code>\u3002\u5982\u679c\u60a8\u9084\u539f\u4e86\u6bcf\u9031\u4e00\u6b21\u7684\u5b8c\u6574\u5099\u4efd\uff0c\u4e26\u4e14\u9700\u8981\u61c9\u7528 6 \u5929\u7684\u4ea4\u6613\u65e5\u8a8c\u624d\u80fd\u9054\u5230\u60a8\u7684 RPO\uff0c\u8cc7\u6599\u5eab\u5f15\u64ce\u5fc5\u9808\u4f9d\u5e8f\u91cd\u64ad\u6bcf\u4e00\u7b46\u4ea4\u6613\u3002<\/p>\n<p>\u91cd\u64ad 500 GB \u7684\u4ea4\u6613\u65e5\u8a8c\u53ef\u80fd\u9700\u8981\u6578\u5c0f\u6642\uff0c\u4e14\u6703\u53d7\u5230\u55ae\u57f7\u884c\u7dd2 CPU \u6548\u80fd\u548c\u5132\u5b58 IOPS \u7684\u56b4\u91cd\u74f6\u9838\u9650\u5236\u3002\u70ba\u4e86\u6700\u5c0f\u5316 <code>T(\u5fa9\u539f)<\/code>\uff0c\u8acb\u589e\u52a0\u5b8c\u6574\u5099\u4efd\u6216\u5dee\u7570\u5099\u4efd\u7684\u983b\u7387\u3002<\/p>\n<h2>\u5f4c\u5408\u5dee\u8ddd\uff1a\u9a57\u8b49 RTO \u548c RPO \u7684\u5be6\u52d9\u6b65\u9a5f<\/h2>\n<p>\u8a08\u7b97\u7406\u8ad6\u4e0a\u7684 RTO \u548c RPO \u53ea\u662f\u7b2c\u4e00\u6b65\u3002\u95dc\u9375\u4efb\u52d9\u74b0\u5883\u9700\u8981\u6301\u7e8c\u7684\u9a57\u8b49\u3002<\/p>\n<h3>\u6b65\u9a5f 1\uff1a\u5be6\u65bd\u6301\u7e8c\u6b78\u6a94<\/h3>\n<p>\u70ba\u4e86\u5728\u4e0d\u72a7\u7272\u540c\u6b65\u8907\u88fd\u6548\u80fd\u7684\u60c5\u6cc1\u4e0b\u5be6\u73fe\u5206\u9418\u7d1a\u7684 RPO\uff0c\u8acb\u5be6\u65bd\u6301\u7e8c\u65e5\u8a8c\u6b78\u6a94\u3002\u4e0d\u8981\u7b49\u5f85\u65e5\u8a8c\u6a94\u6848\u586b\u6eff\uff08\u5728\u4f4e\u6d41\u91cf\u671f\u9593\u53ef\u80fd\u9700\u8981\u6578\u5c0f\u6642\uff09\uff0c\u800c\u61c9\u5f37\u5236\u5728\u56fa\u5b9a\u9593\u9694\u9032\u884c\u65e5\u8a8c\u5207\u63db\u3002<\/p>\n<p>\u5728 SQL Server \u4e2d\uff0c\u60a8\u53ef\u4ee5\u81ea\u52d5\u5316\u983b\u7e41\u7684\u4ea4\u6613\u65e5\u8a8c\u5099\u4efd\uff1a<\/p>\n<pre><code class=\"language-sql\">BACKUP LOG [MissionCriticalDB] \nTO DISK = N'\\BackupRepoSQLMissionCriticalDB_Log.trn' \nWITH NOFORMAT, NOINIT, \nNAME = N'MissionCriticalDB-Transaction Log Backup', \nSKIP, NOREWIND, NOUNLOAD, COMPRESSION, STATS = 10;\n<\/code><\/pre>\n<p><em>\u6700\u4f73\u5be6\u8e10\uff1a<\/em> \u6839\u64da\u60a8\u7684 RPO \u8981\u6c42\uff0c\u5c07\u6b64\u4f5c\u696d\u6392\u7a0b\u70ba\u6bcf 1-5 \u5206\u9418\u57f7\u884c\u4e00\u6b21\u3002<\/p>\n<h3>\u6b65\u9a5f 2\uff1a\u81ea\u52d5\u5316\u9084\u539f\u6e2c\u8a66<\/h3>\n<p>\u672a\u7d93\u6e2c\u8a66\u7684\u5099\u4efd\u50c5\u50c5\u662f\u4e00\u500b\u7406\u8ad6\u6982\u5ff5\u3002\u70ba\u4e86\u4fdd\u8b49\u60a8\u8a08\u7b97\u51fa\u7684 RTO\uff0c\u60a8\u5fc5\u9808\u57f7\u884c\u81ea\u52d5\u5316\u9084\u539f\u6e2c\u8a66\u3002<\/p>\n<p>\u50cf CloudSave \u9019\u6a23\u7684\u4f01\u696d\u7d1a\u5099\u4efd\u5e73\u53f0\u900f\u904e\u63d0\u4f9b\u81ea\u52d5\u5316\u3001\u9694\u96e2\u7684\u5fa9\u539f\u6e2c\u8a66\u4f86\u7c21\u5316\u6b64\u6d41\u7a0b\u3002CloudSave \u53ef\u4ee5\u81ea\u52d5\u555f\u52d5\u6c99\u76d2\u74b0\u5883\u3001\u639b\u8f09\u6700\u65b0\u5099\u4efd\u3001\u57f7\u884c\u5b8c\u6574\u7684\u8cc7\u6599\u5eab\u5fa9\u539f\uff0c\u4e26\u57f7\u884c\u81ea\u8a02\u9a57\u8b49\u6307\u4ee4\u78bc\uff08\u4f8b\u5982 SQL Server \u7684 <code>DBCC CHECKDB<\/code>\uff09\u4f86\u6e2c\u91cf\u78ba\u5207\u7684 RTO \u4e26\u78ba\u4fdd\u8cc7\u6599\u5b8c\u6574\u6027\u3002\u9019\u5c07 RTO \u5f9e\u4e00\u500b\u8a08\u7b97\u51fa\u7684\u731c\u6e2c\u8f49\u8b8a\u70ba\u4e00\u500b\u7d93\u904e\u9a57\u8b49\u3001\u53ef\u5831\u544a\u7684\u6307\u6a19\u3002<\/p>\n<h3>\u6b65\u9a5f 3\uff1a\u76e3\u63a7\u4e26\u91dd\u5c0d SLA \u9055\u898f\u767c\u51fa\u8b66\u5831<\/h3>\n<p>\u60a8\u7684\u76e3\u63a7\u5806\u758a\uff08Prometheus\u3001Datadog\u3001Zabbix\uff09\u61c9\u4e3b\u52d5\u8ffd\u8e64\u5a01\u8105\u60a8 RTO\/RPO SLA \u7684\u6307\u6a19\u3002\u61c9\u91dd\u5c0d\u4ee5\u4e0b\u60c5\u6cc1\u8a2d\u5b9a\u8b66\u5831\u898f\u5247\uff1a<br \/>\n*   <strong>\u5099\u4efd\u4f5c\u696d\u5931\u6557\uff1a<\/strong> \u5c0d RPO \u7684\u76f4\u63a5\u5a01\u8105\u3002<br \/>\n*   <strong>\u65e5\u8a8c\u50b3\u8f38\u5ef6\u9072\uff1a<\/strong> \u5982\u679c\u65e5\u8a8c\u50b3\u8f38\u6642\u9593\u8d85\u904e\u4e86\u751f\u6210\u9593\u9694\u3002<br \/>\n*   <strong>\u5132\u5b58 IOPS \u7bc0\u6d41\uff1a<\/strong> \u96f2\u7aef\u4f9b\u61c9\u5546\uff08\u5982 AWS EBS\uff09\u5982\u679c\u8017\u76e1\u4e86\u7a81\u767c\u984d\u5ea6 (burst credits) \u6703\u9650\u5236 IOPS\uff0c\u9019\u6703\u5728\u5be6\u969b\u7dca\u6025\u60c5\u6cc1\u4e0b\u6084\u7121\u8072\u606f\u5730\u6467\u6bc0\u60a8\u7684 RTO\u3002<\/p>\n<h2>\u512a\u5316\u8cc7\u6599\u5eab\u5099\u4efd\u67b6\u69cb\u4ee5\u6eff\u8db3\u56b4\u683c\u7684 SLA<\/h2>\n<p>\u7576\u6578\u5b78\u8a08\u7b97\u986f\u793a\u60a8\u76ee\u524d\u7684\u67b6\u69cb\u7121\u6cd5\u6eff\u8db3\u696d\u52d9 SLA \u6642\uff0c\u60a8\u5fc5\u9808\u512a\u5316\u5099\u4efd\u7b56\u7565\u3002<\/p>\n<h3>1. \u5229\u7528\u5340\u584a\u5c64\u7d1a\u589e\u91cf\u5099\u4efd<\/h3>\n<p>\u50b3\u7d71\u7684\u8cc7\u6599\u5eab\u50be\u5370\uff08\u5982 <code>pg_dump<\/code> \u6216 <code>mysqldump<\/code> \u7b49\u908f\u8f2f\u5099\u4efd\uff09\u5c0d\u65bc\u95dc\u9375\u4efb\u52d9\u7684 RTO \u4f86\u8aaa\u592a\u6162\u4e86\u3002\u8acb\u4f7f\u7528\u5be6\u9ad4\u3001\u5340\u584a\u5c64\u7d1a\u7684\u5099\u4efd\u3002\u5340\u584a\u5c64\u7d1a\u589e\u91cf\u5099\u4efd\u50c5\u8907\u88fd\u81ea\u4e0a\u6b21\u5099\u4efd\u4ee5\u4f86\u5df2\u8b8a\u66f4\u7684\u78c1\u789f\u5340\u584a\uff0c\u5f9e\u800c\u5927\u5e45\u6e1b\u5c11 <code>T(\u50b3\u8f38)<\/code> \u548c\u7db2\u8def\u958b\u92b7\u3002<\/p>\n<h3>2. \u5229\u7528\u5132\u5b58\u5feb\u7167<\/h3>\n<p>\u5c0d\u65bc\u9700\u8981\u5c0f\u65bc 15 \u5206\u9418 RTO \u7684\u591a TB \u8cc7\u6599\u5eab\uff0c\u50b3\u7d71\u7684\u6a94\u6848\u8907\u88fd\u5728\u6a19\u6e96\u7db2\u8def\u4e0a\u5728\u7269\u7406\u4e0a\u662f\u4e0d\u53ef\u80fd\u7684\u3002\u8207 SAN \u6216\u96f2\u7aef\u539f\u751f\u5132\u5b58\u5feb\u7167\uff08\u4f8b\u5982 AWS EBS Snapshots\u3001Pure Storage\uff09\u6574\u5408\uff0c\u53ef\u4ee5\u5be6\u73fe\u8fd1\u4e4e\u5373\u6642\u7684 <code>T(\u9084\u539f)<\/code>\u3002\u8cc7\u6599\u5eab\u5f15\u64ce\u96a8\u5f8c\u50c5\u9700\u5c0d\u5feb\u7167\u57f7\u884c\u5d29\u6f70\u5fa9\u539f\u5373\u53ef\u3002<\/p>\n<h3>3. \u5be6\u65bd\u5e73\u884c\u8655\u7406<\/h3>\n<p>\u78ba\u4fdd\u60a8\u7684\u5099\u4efd\u548c\u9084\u539f\u5de5\u5177\u5229\u7528\u591a\u57f7\u884c\u7dd2\u3002\u5728\u4f7f\u7528 <code>pgbackrest<\/code> \u9084\u539f PostgreSQL \u8cc7\u6599\u5eab\u6216\u9084\u539f SQL Server \u8cc7\u6599\u5eab\u6642\uff0c\u660e\u78ba\u5b9a\u7fa9\u5e73\u884c\u5de5\u4f5c\u57f7\u884c\u7dd2\u4ee5\u5145\u5206\u5229\u7528\u60a8\u53ef\u7528\u7684\u7db2\u8def\u548c\u78c1\u789f\u983b\u5bec\u3002<\/p>\n<pre><code class=\"language-bash\"># pgBackRest \u4e2d\u7684\u5e73\u884c\u9084\u539f\u7bc4\u4f8b\npgbackrest --stanza=prod_db --process-max=8 restore\n<\/code><\/pre>\n<h2>\u7d50\u8ad6<\/h2>\n<p>\u70ba\u95dc\u9375\u4efb\u52d9\u8cc7\u6599\u5eab\u8a08\u7b97 RTO \u548c RPO \u662f\u4e00\u9805\u56b4\u8b39\u7684\u7cfb\u7d71\u5de5\u7a0b\u7df4\u7fd2\u3002\u5b83\u8981\u6c42 DBA \u8d85\u8d8a\u9810\u8a2d\u7684\u5099\u4efd\u914d\u7f6e\uff0c\u4e26\u4ee5\u6578\u5b78\u65b9\u5f0f\u5c0d\u5176\u5132\u5b58 I\/O\u3001\u7db2\u8def\u5bb9\u91cf\u548c\u8cc7\u6599\u5eab\u5fa9\u539f\u6a5f\u5236\u9032\u884c\u5efa\u6a21\u3002<\/p>\n<p>\u900f\u904e\u5efa\u7acb\u65e5\u8a8c\u751f\u6210\u901f\u7387\u57fa\u6e96\u3001\u4e86\u89e3\u8cc7\u6599\u5eab\u5fa9\u539f\u7684\u4e0d\u540c\u968e\u6bb5\uff0c\u4e26\u900f\u904e CloudSave \u7b49\u5f37\u5927\u5e73\u53f0\u5be6\u65bd\u81ea\u52d5\u5316\u6e2c\u8a66\uff0cIT \u5718\u968a\u53ef\u4ee5\u81ea\u4fe1\u5730\u4fdd\u8b49\u5176\u707d\u96e3\u5fa9\u539f SLA\u3002\u8acb\u8a18\u4f4f\uff1a\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u9818\u57df\uff0c\u5e0c\u671b\u4e26\u975e\u4e00\u7a2e\u7b56\u7565\uff0c\u800c\u672a\u7d93\u6e2c\u8a66\u7684\u5099\u4efd\u5247\u662f\u4e00\u7a2e\u8ca0\u50b5\u3002<\/p>\n<blockquote>\n<p>\u4e86\u89e3 DevOps \u5de5\u7a0b\u5e2b\u548c DBA \u5982\u4f55\u4f7f\u7528\u5148\u9032\u7684\u5fa9\u539f\u6a5f\u5236\u3001CLI \u5de5\u5177\u548c\u81ea\u52d5\u5316\u6e2c\u8a66\uff0c\u70ba\u95dc\u9375\u4efb\u52d9\u8cc7\u6599\u5eab\u6e96\u78ba\u8a08\u7b97\u3001\u6e2c\u8a66\u4e26\u512a\u5316 RTO \u548c RPO\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":"Calculate RTO & RPO for Mission-Critical Databases","rank_math_description":"**","rank_math_focus_keyword":"calculate RTO and RPO","footnotes":""},"categories":[1451],"tags":[4343,368,3597,3598,4344,4345],"class_list":["post-6103","post","type-post","status-publish","format-standard","hentry","category-disaster-recovery","tag-business-continuity","tag-data-loss-prevention","tag-database-recovery","tag-dba-guide","tag-mission-critical-databases","tag-rto-and-rpo"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.7 (Yoast SEO v27.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Calculate RTO &amp; RPO for Mission-Critical Databases<\/title>\n<meta name=\"description\" content=\"**\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cloudsave.app\/zh-hant\/knowledge-base\/%e7%82%ba%e9%97%9c%e9%8d%b5%e4%bb%bb%e5%8b%99%e8%b3%87%e6%96%99%e5%ba%ab%e8%a8%88%e7%ae%97-rto-%e8%88%87-rpo-dba-%e6%8c%87%e5%8d%97\/\" \/>\n<meta property=\"og:locale\" content=\"zh_TW\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u70ba\u95dc\u9375\u4efb\u52d9\u8cc7\u6599\u5eab\u8a08\u7b97 RTO \u8207 RPO\uff1aDBA \u6307\u5357\" \/>\n<meta property=\"og:description\" content=\"**\" \/>\n<meta property=\"og:url\" content=\"https:\/\/cloudsave.app\/zh-hant\/knowledge-base\/%e7%82%ba%e9%97%9c%e9%8d%b5%e4%bb%bb%e5%8b%99%e8%b3%87%e6%96%99%e5%ba%ab%e8%a8%88%e7%ae%97-rto-%e8%88%87-rpo-dba-%e6%8c%87%e5%8d%97\/\" \/>\n<meta property=\"og:site_name\" content=\"CloudSave\" \/>\n<meta property=\"article:published_time\" 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class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/cloudsave.app\\\/zh-hant\\\/knowledge-base\\\/%e7%82%ba%e9%97%9c%e9%8d%b5%e4%bb%bb%e5%8b%99%e8%b3%87%e6%96%99%e5%ba%ab%e8%a8%88%e7%ae%97-rto-%e8%88%87-rpo-dba-%e6%8c%87%e5%8d%97\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/cloudsave.app\\\/zh-hant\\\/knowledge-base\\\/%e7%82%ba%e9%97%9c%e9%8d%b5%e4%bb%bb%e5%8b%99%e8%b3%87%e6%96%99%e5%ba%ab%e8%a8%88%e7%ae%97-rto-%e8%88%87-rpo-dba-%e6%8c%87%e5%8d%97\\\/\"},\"author\":{\"name\":\"shervinrv\",\"@id\":\"https:\\\/\\\/cloudsave.app\\\/zh-hant\\\/#\\\/schema\\\/person\\\/286beefe68281d868e87f46603a7ae4d\"},\"headline\":\"\u70ba\u95dc\u9375\u4efb\u52d9\u8cc7\u6599\u5eab\u8a08\u7b97 RTO \u8207 RPO\uff1aDBA 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