{"id":32588,"date":"2026-08-13T10:00:00","date_gmt":"2026-08-13T02:00:00","guid":{"rendered":"https:\/\/cn.hostease.com\/blog\/?p=32588"},"modified":"2026-08-16T19:20:16","modified_gmt":"2026-08-16T11:20:16","slug":"ceph-rbd-latency-osd","status":"publish","type":"post","link":"https:\/\/cn.hostease.com\/blog\/guides\/ceph-rbd-latency-osd\/","title":{"rendered":"Ceph RBD \u5ef6\u8fdf\u6392\u67e5\uff1a\u4ece OSD \u72b6\u6001\u5230\u4e91\u670d\u52a1\u5668\u5757\u5b58\u50a8\u6027\u80fd"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/cn.hostease.com\/blog\/wp-content\/uploads\/2026\/08\/ceph-rbd-latency-osd-cover.webp\" alt=\"Ceph RBD \u5ef6\u8fdf\u6392\u67e5\u5c01\u9762\" loading=\"lazy\" \/><\/p>\n<p>\u8fd9\u7bc7\u6307\u5357\u5e2e\u52a9\u4f60\u6392\u67e5 Ceph\uff08\u4e00\u79cd\u5206\u5e03\u5f0f\u5b58\u50a8\u7cfb\u7edf\uff09RBD\uff08RADOS Block Device\uff0c\u5757\u8bbe\u5907\uff09\u5ef6\u8fdf\u95ee\u9898\uff1a\u4ece OSD\uff08Object Storage Daemon\uff0c\u5bf9\u8c61\u5b58\u50a8\u5b88\u62a4\u8fdb\u7a0b\uff09\u72b6\u6001\u3001PG\uff08Placement Group\uff0c\u5f52\u7f6e\u7ec4\uff09\u5206\u5e03\u5230\u7f51\u7edc\u5ef6\u8fdf\uff0c\u9010\u5c42\u5b9a\u4f4d\u6839\u56e0\u3002RBD \u5ef6\u8fdf\u76f4\u63a5\u5f71\u54cd\u4e91\u670d\u52a1\u5668\u4e0a\u6570\u636e\u5e93\u548c\u865a\u62df\u673a\u7684 I\/O \u6027\u80fd\uff0c\u6392\u67e5\u6bd4\u5355\u673a\u5b58\u50a8\u590d\u6742\uff0c\u9700\u8981\u7406\u89e3 Ceph \u7684\u591a\u526f\u672c\u5199\u5165\u548c\u6062\u590d\u6d41\u7a0b\u3002<\/p>\n<p>\u5982\u679c\u4f60\u7684\u4e91\u670d\u52a1\u5668\u8dd1 Kubernetes \u6216 KVM \u865a\u62df\u673a\uff0c\u540e\u7aef\u5b58\u50a8\u5e38\u7528 Ceph RBD\u3002Hostease \u4e2d\u6587\u535a\u5ba2\u7684 <a href=\"https:\/\/cn.hostease.com\/blog\/guides\/wordpress-database-cleanup-query-optimization\/\">WordPress \u6570\u636e\u5e93\u4f18\u5316<\/a>\u5173\u6ce8\u67e5\u8be2\u5c42\u9762\uff0c<a href=\"https:\/\/cn.hostease.com\/blog\/guides\/vps-incident-response-guide\/\">VPS \u5165\u4fb5\u5e94\u6025<\/a>\u5173\u6ce8\u5b89\u5168\u5c42\u9762\uff0c\u672c\u6587\u805a\u7126\u5b58\u50a8\u5c42\u9762\uff1a\u600e\u4e48\u5b9a\u4f4d RBD \u5ef6\u8fdf\u7684\u6839\u56e0\uff0c\u600e\u4e48\u5224\u65ad\u662f OSD \u5f02\u5e38\u8fd8\u662f\u7f51\u7edc\u74f6\u9888\u3002Ceph \u96c6\u7fa4\u76f8\u6bd4\u5355\u673a\u5b58\u50a8\u590d\u6742\uff0c\u56e0\u4e3a\u5b83\u6d89\u53ca\u591a\u526f\u672c\u540c\u6b65\u548c\u6062\u590d\u673a\u5236\uff0c\u6392\u67e5\u65f6\u8981\u7406\u89e3\u4e3b OSD \u548c\u526f\u672c OSD \u7684\u5199\u5165\u786e\u8ba4\u6d41\u7a0b\uff0c\u624d\u80fd\u51c6\u786e\u5b9a\u4f4d\u662f\u54ea\u4e00\u73af\u62d6\u6162\u4e86\u5ef6\u8fdf\u3002\u540c\u65f6\u8981\u628a Ceph \u5ef6\u8fdf\u7eb3\u5165\u4e1a\u52a1 SLA \u76d1\u63a7\uff0c\u907f\u514d\u6210\u4e3a\u9690\u6027\u6545\u969c\u70b9\u3002<\/p>\n<h2>\u4e00\u3001Ceph RBD \u7684\u5199\u5165\u8def\u5f84<\/h2>\n<p>Ceph RBD \u5199\u5165\u91c7\u7528\u591a\u526f\u672c\u673a\u5236\u3002\u5ba2\u6237\u7aef\u5199\u5165 RBD \u65f6\uff0c\u6570\u636e\u5148\u5230\u4e3b OSD\uff08Primary OSD\uff09\uff0c\u4e3b OSD \u5199\u5165\u5b8c\u6210\u540e\u540c\u6b65\u5230\u526f\u672c OSD\uff08Replica OSD\uff09\uff0c\u6240\u6709\u526f\u672c\u786e\u8ba4\u540e\u624d\u8fd4\u56de\u5ba2\u6237\u7aef\u3002\u8fd9\u4e2a\u6d41\u7a0b\u6d89\u53ca\u7684\u73af\u8282\uff1a\u5ba2\u6237\u7aef\u5230\u4e3b OSD \u7684\u7f51\u7edc\u5ef6\u8fdf\u3001\u4e3b OSD \u7684\u5199\u5165\u541e\u5410\u3001\u526f\u672c\u540c\u6b65\u7684\u7f51\u7edc\u5ef6\u8fdf\u3001\u526f\u672c OSD \u7684\u5199\u5165\u541e\u5410\u3002\u4efb\u4f55\u4e00\u73af\u5f02\u5e38\u90fd\u4f1a\u5bfc\u81f4\u5ef6\u8fdf\u589e\u52a0\u3002<\/p>\n<p>\u9ed8\u8ba4\u914d\u7f6e\u4e0b Ceph \u4f7f\u7528 PG \u6570\u91cf = \u526f\u672c\u6570 \u00d7 OSD \u6570\u91cf \/ 100 \u8ba1\u7b97\u3002PG \u8fc7\u5c11\u4f1a\u5bfc\u81f4\u6bcf\u4e2a OSD \u4e0a\u7684 PG \u5206\u5e03\u4e0d\u5747\uff0c\u5355\u4e2a PG \u538b\u529b\u5927\uff1bPG \u8fc7\u591a\u4f1a\u589e\u52a0 PG \u72b6\u6001\u540c\u6b65\u5f00\u9500\u3002\u5efa\u8bae PG \u6570\u91cf\u5728 100 \u5230 300 \u4e4b\u95f4\uff0c\u5355\u4e2a OSD \u4e0a\u7684 PG \u6570\u91cf\u63a7\u5236\u5728 100 \u4ee5\u5185\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/cn.hostease.com\/blog\/wp-content\/uploads\/2026\/08\/ceph-rbd-latency-osd-flow.webp\" alt=\"OSD \u72b6\u6001\u4e0e\u5199\u5165\u8def\u5f84\" loading=\"lazy\" \/><\/p>\n<h2>\u4e8c\u3001\u67e5\u770b OSD \u72b6\u6001<\/h2>\n<p>OSD \u72b6\u6001\u5f02\u5e38\u662f RBD \u5ef6\u8fdf\u7684\u6700\u5e38\u89c1\u539f\u56e0\u3002\u5148\u7528 <code>ceph osd tree<\/code> \u67e5\u770b OSD \u6811\u5f62\u7ed3\u6784\uff0c\u786e\u8ba4\u6240\u6709 OSD \u90fd\u662f up \u548c in \u72b6\u6001\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"bash\" data-enlighter-linenumbers=\"false\">ceph osd tree\nceph health detail\nceph osd perf<\/pre>\n<p>\u5982\u679c\u67d0\u4e2a OSD \u663e\u793a down \u6216 out\uff0c\u8bf4\u660e\u8be5 OSD \u4e0a\u7684\u6570\u636e\u4e0d\u53ef\u7528\uff0c\u5199\u5165\u4f1a\u7b49\u5230\u526f\u672c\u6062\u590d\u6216\u8d85\u65f6\u8fd4\u56de\u3002\u9700\u8981\u7acb\u5373\u67e5\u770b OSD \u8fdb\u7a0b\u72b6\u6001\uff1a<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"bash\" data-enlighter-linenumbers=\"false\">systemctl status ceph-osd@0\njournalctl -u ceph-osd@0 -n 100<\/pre>\n<p>OSD \u8fdb\u7a0b\u5f02\u5e38\u9000\u51fa\u7684\u5e38\u89c1\u539f\u56e0\u5305\u62ec\u78c1\u76d8\u6545\u969c\u3001\u5185\u5b58\u4e0d\u8db3\u3001\u7f51\u7edc\u6296\u52a8\u3002\u5982\u679c\u662f\u78c1\u76d8\u6545\u969c\uff0cOSD \u8282\u70b9\u9700\u8981\u66f4\u6362\u78c1\u76d8\u540e\u91cd\u65b0\u52a0\u5165\u96c6\u7fa4\u3002\u5982\u679c\u53ea\u662f\u8fdb\u7a0b\u5d29\u6e83\uff0c\u91cd\u542f\u540e\u4f1a\u89e6\u53d1\u6570\u636e\u6062\u590d\uff0c\u671f\u95f4\u5ef6\u8fdf\u4f1a\u66f4\u9ad8\u3002\u53ef\u4ee5\u7528 <code>smartctl -a \/dev\/sdX<\/code> \u68c0\u67e5\u78c1\u76d8\u5065\u5eb7\u72b6\u6001\uff0c\u5173\u6ce8 ReallocatedSectorCount \u548c CurrentPendingSector \u7b49\u6307\u6807\u662f\u5426\u589e\u957f\uff0c\u8fd9\u4e9b\u6307\u6807\u53cd\u6620\u78c1\u76d8\u662f\u5426\u5f00\u59cb\u51fa\u73b0\u7269\u7406\u574f\u9053\u3002\u574f\u9053\u589e\u591a\u4f1a\u5bfc\u81f4\u5199\u5165\u5ef6\u8fdf\u5347\u9ad8\uff0c\u6700\u7ec8\u89e6\u53d1 OSD \u81ea\u52a8\u4e0b\u7ebf\u4fdd\u62a4\u6570\u636e\u3002<\/p>\n<p>\u8fd8\u6709\u4e00\u79cd\u5e38\u89c1\u60c5\u51b5\u662f OSD \u6ca1\u5d29\u6e83\u4f46\u53d8\u6162\u3002\u78c1\u76d8\u4f7f\u7528\u65f6\u95f4\u53d8\u957f\u540e\uff0cI\/O \u6027\u80fd\u4f1a\u9010\u6e10\u4e0b\u964d\uff0c\u7279\u522b\u662f HDD \u673a\u68b0\u786c\u76d8\u3002\u7528 <code>fio<\/code> \u6d4b\u8bd5\u88f8\u76d8\u6027\u80fd\uff0c\u548c RBD \u4e0a\u7684 fio \u6d4b\u8bd5\u7ed3\u679c\u5bf9\u6bd4\u3002\u5982\u679c\u88f8\u76d8\u6b63\u5e38\u4f46 RBD \u5f02\u5e38\uff0c\u95ee\u9898\u5728 Ceph \u5c42\uff1b\u5982\u679c\u88f8\u76d8\u4e5f\u5f02\u5e38\uff0c\u9700\u8981\u66f4\u6362\u6216\u5347\u7ea7\u78c1\u76d8\u3002OSD \u8282\u70b9\u672c\u8eab\u7684 CPU \u548c\u5185\u5b58\u4e5f\u4f1a\u5f71\u54cd\u5ef6\u8fdf\uff0cOSD \u8fdb\u7a0b\u662f\u9ad8 CPU \u5bc6\u96c6\u578b\u5e94\u7528\uff0c\u590d\u5236\u548c\u6062\u590d\u65f6 CPU \u6d88\u8017\u663e\u8457\uff0cCPU \u8d44\u6e90\u4e0d\u8db3\u4f1a\u8ba9\u5ef6\u8fdf\u98d9\u5347\u3002<\/p>\n<h2>\u4e09\u3001\u68c0\u67e5 PG \u5206\u5e03<\/h2>\n<p>PG \u5206\u5e03\u4e0d\u5747\u4f1a\u5bfc\u81f4\u90e8\u5206 OSD \u538b\u529b\u8fc7\u5927\uff0c\u8868\u73b0\u4e3a\u8fd9\u4e9b OSD \u4e0a\u7684\u5ef6\u8fdf\u9ad8\u4e8e\u5e73\u5747\u6c34\u5e73\u3002\u7528 <code>ceph pg dump<\/code> \u67e5\u770b\u6bcf\u4e2a PG \u7684\u72b6\u6001\u548c\u4e3b OSD\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"bash\" data-enlighter-linenumbers=\"false\">ceph pg dump | head -20\nceph pg dump_stuck<\/pre>\n<p>\u5173\u6ce8 stuck\uff08\u5361\u4f4f\uff09\u7684 PG\uff1a\u5982\u679c PG \u957f\u65f6\u95f4\u5904\u4e8e active+clean \u4e4b\u5916\u7684\u72b6\u6001\uff08\u6bd4\u5982 active+remapped\u3001stale\uff09\uff0c\u8bf4\u660e\u6570\u636e\u8fc1\u79fb\u6216\u6062\u590d\u672a\u5b8c\u6210\uff0c\u5ef6\u8fdf\u4f1a\u6301\u7eed\u5347\u9ad8\u3002\u5e38\u89c1\u5361\u4f4f\u539f\u56e0\u662f backfill\uff08\u6570\u636e\u56de\u586b\uff09\u901f\u5ea6\u8fc7\u4f4e\u6216\u6062\u590d\u4f18\u5148\u7ea7\u8bbe\u7f6e\u4e0d\u5f53\u3002\u53ef\u4ee5\u901a\u8fc7 <code>ceph config set osd_recovery_max_active_hdd 3<\/code> \u9650\u5236\u5e76\u53d1\u6062\u590d\u4efb\u52a1\u6570\uff0c\u907f\u514d\u6062\u590d\u548c\u5199\u5165\u4e92\u76f8\u6324\u5360\u8d44\u6e90\u3002<\/p>\n<h2>\u56db\u3001\u7f51\u7edc\u5ef6\u8fdf\u6392\u67e5<\/h2>\n<p>\u591a\u526f\u672c Ceph \u96c6\u7fa4\u5bf9\u7f51\u7edc\u5ef6\u8fdf\u975e\u5e38\u654f\u611f\u3002OSD \u8282\u70b9\u4e4b\u95f4\u7684\u7f51\u7edc\u5ef6\u8fdf\u76f4\u63a5\u51b3\u5b9a\u526f\u672c\u540c\u6b65\u901f\u5ea6\u3002\u7528 <code>iperf3<\/code> \u548c <code>fio<\/code> \u5206\u522b\u6d4b\u8bd5\u7f51\u7edc\u5e26\u5bbd\u548c\u5b58\u50a8\u5ef6\u8fdf\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"bash\" data-enlighter-linenumbers=\"false\">iperf3 -c osd-node-2 -t 30\nfio --name=randwrite --filename=\/dev\/rbd0 --rw=randwrite --bs=4k --size=1G --runtime=30 --time_based --direct=1 --ioengine=libaio<\/pre>\n<p>\u5982\u679c\u7f51\u7edc\u5e26\u5bbd\u4f4e\u4e8e\u9884\u671f\uff08\u5982\u5343\u5146\u7f51\u5361\u5b9e\u9645\u53ea\u8dd1 500Mbps\uff09\uff0c\u68c0\u67e5\u4ea4\u6362\u673a\u914d\u7f6e\u548c\u7f51\u5361\u7ed1\u5b9a\u72b6\u6001\u3002\u5982\u679c fio \u6d4b\u8bd5\u7684 RBD \u5ef6\u8fdf\u8fdc\u9ad8\u4e8e\u672c\u5730\u78c1\u76d8\u5ef6\u8fdf\uff0c\u8bf4\u660e Ceph \u7f51\u7edc\u5c42\u5f15\u5165\u7684\u5f00\u9500\u8fc7\u5927\u3002\u53ef\u4ee5\u5c1d\u8bd5\u8c03\u6574 <code>ms_dispatch_throttle_low<\/code> \u548c <code>ms_dispatch_throttle_high<\/code> \u53c2\u6570\u4f18\u5316\u8bf7\u6c42\u5206\u53d1\u3002<\/p>\n<table>\n<thead>\n<tr>\n<th>\u7ec4\u4ef6<\/th>\n<th>\u5065\u5eb7\u6307\u6807<\/th>\n<th>\u5f02\u5e38\u4fe1\u53f7<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>OSD \u8fdb\u7a0b<\/td>\n<td>\u5168\u90e8 up \u4e14 in<\/td>\n<td>down \u6216 out<\/td>\n<\/tr>\n<tr>\n<td>OSD \u78c1\u76d8<\/td>\n<td>smartctl \u5065\u5eb7<\/td>\n<td>ReallocatedSectorCount \u589e\u957f<\/td>\n<\/tr>\n<tr>\n<td>PG \u72b6\u6001<\/td>\n<td>active+clean<\/td>\n<td>stale\u3001incomplete<\/td>\n<\/tr>\n<tr>\n<td>\u7f51\u7edc\u5ef6\u8fdf<\/td>\n<td>\u5c0f\u4e8e 1ms\uff08\u540c IDC\uff09<\/td>\n<td>\u5927\u4e8e 5ms \u6216\u6296\u52a8<\/td>\n<\/tr>\n<tr>\n<td>\u5ef6\u8fdf\u5206\u5e03<\/td>\n<td>P99 \u5c0f\u4e8e 10ms<\/td>\n<td>P99 \u5927\u4e8e 50ms<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u4e94\u3001\u5ba2\u6237\u7aef\u7f13\u5b58\u4e0e\u914d\u7f6e\u4f18\u5316<\/h2>\n<p>RBD \u5ba2\u6237\u7aef\u7f13\u5b58\u53ef\u4ee5\u51cf\u5c11\u76f4\u63a5\u547d\u4e2d Ceph \u540e\u7aef\u7684\u9891\u7387\u3002\u7528 <code>rbd config pool<\/code> \u67e5\u770b\u6c60\u7ea7\u522b\u914d\u7f6e\uff0c\u8c03\u6574 rbd_cache_size \u548c rbd_cache_max_dirty \u63d0\u5347\u8bfb\u6027\u80fd\u3002<\/p>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"bash\" data-enlighter-linenumbers=\"false\">rbd config pool set rbd rbd_cache_size 256MiB\nrbd config pool set rbd rbd_cache_max_dirty 128MiB<\/pre>\n<p>\u5199\u5ef6\u8fdf\u4f18\u5316\u53ef\u4ee5\u4ece\u526f\u672c\u6570\u5165\u624b\uff1a3 \u526f\u672c\u63d0\u4f9b\u9ad8\u53ef\u7528\u4f46\u5ef6\u8fdf\u9ad8\uff0c2 \u526f\u672c\u5ef6\u8fdf\u4f4e\u4f46\u5bb9\u9519\u5dee\u3002\u5bf9\u4e8e\u8bfb\u591a\u5199\u5c11\u7684\u573a\u666f\uff0c\u53ef\u4ee5\u7528 cache tiering\uff08\u7f13\u5b58\u5206\u5c42\uff09\u628a\u70ed\u6570\u636e\u653e\u5728 SSD\uff08\u56fa\u6001\u786c\u76d8\uff09\u6c60\uff0c\u51b7\u6570\u636e\u653e\u5728 HDD\uff08\u673a\u68b0\u786c\u76d8\uff09\u6c60\u3002\u5982\u679c\u4f60\u7684\u5b58\u50a8\u540e\u7aef\u662f <a href=\"https:\/\/cn.hostease.com\/blog\/guides\/multi-layer-cache-architecture\/\">\u591a\u5c42\u7f13\u5b58\u67b6\u6784<\/a>\u91cc\u7684\u67d0\u4e00\u5c42\uff0cCeph RBD \u672c\u8eab\u7684\u7f13\u5b58\u53c2\u6570\u9700\u8981\u548c\u4e0a\u5c42\u7f13\u5b58\u7b56\u7565\u534f\u8c03\uff0c\u907f\u514d\u7f13\u5b58\u5931\u6548\u5bfc\u81f4\u7a7f\u900f\u5230\u5e95\u5c42\u5b58\u50a8\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/cn.hostease.com\/blog\/wp-content\/uploads\/2026\/08\/ceph-rbd-latency-osd-comparison.webp\" alt=\"RBD \u5ef6\u8fdf\u6839\u56e0\u4e0e\u4fee\u590d\u5bf9\u6bd4\" loading=\"lazy\" \/><\/p>\n<h2>\u516d\u3001\u76d1\u63a7\u4e0e\u544a\u8b66<\/h2>\n<p>\u957f\u671f\u76d1\u63a7 RBD \u5ef6\u8fdf\u548c OSD \u5065\u5eb7\u6307\u6807\u3002\u7528 Prometheus \u6293\u53d6 Ceph \u81ea\u5e26\u7684 mgr exporter\uff0c\u914d\u7f6e\u544a\u8b66\u9608\u503c\uff1a\u5f53 P99 \u5ef6\u8fdf\u8d85\u8fc7 50ms \u6301\u7eed 5 \u5206\u949f\u544a\u8b66\u3001\u5f53 OSD down \u6570\u5927\u4e8e 0 \u7acb\u5373\u544a\u8b66\u3001\u5f53 stuck PG \u6570\u91cf\u589e\u957f\u544a\u8b66\u3002\u544a\u8b66\u89e6\u53d1\u540e\u6309\u672c\u6587\u7684\u6392\u67e5\u987a\u5e8f\u5b9a\u4f4d\u6839\u56e0\uff1a\u5148\u770b OSD \u72b6\u6001\u3001\u518d\u770b PG \u5206\u5e03\u3001\u6700\u540e\u770b\u7f51\u7edc\u5ef6\u8fdf\u3002\u5982\u679c\u4f60\u5728 <a href=\"https:\/\/cn.hostease.com\/blog\/guides\/multi-layer-cache-architecture\/\">\u591a\u5c42\u7f13\u5b58\u67b6\u6784<\/a>\u4e2d\u8fd0\u884c Ceph\uff0c\u76d1\u63a7\u544a\u8b66\u8fd8\u9700\u8981\u548c\u4e0a\u5c42\u7f13\u5b58\u5c42\u6253\u901a\uff0c\u907f\u514d\u4e0a\u5c42\u7f13\u5b58\u5931\u6548\u65f6 Ceph \u5ef6\u8fdf\u65e0\u6cd5\u88ab\u53ca\u65f6\u53d1\u73b0\u3002<\/p>\n<h2>\u603b\u7ed3<\/h2>\n<p>Ceph RBD \u5ef6\u8fdf\u6392\u67e5\u8981\u4ece OSD \u72b6\u6001\u3001PG \u5206\u5e03\u3001\u7f51\u7edc\u5ef6\u8fdf\u3001\u5ba2\u6237\u7aef\u7f13\u5b58\u56db\u4e2a\u7ef4\u5ea6\u9010\u5c42\u5b9a\u4f4d\u3002OSD \u5f02\u5e38\u662f\u6700\u5e38\u89c1\u6839\u56e0\uff0c\u5148\u786e\u8ba4\u6240\u6709 OSD up \u4e14 in\uff1bPG \u5361\u4f4f\u662f\u6062\u590d\u671f\u7684\u5178\u578b\u95ee\u9898\uff0c\u8c03\u6574\u6062\u590d\u4f18\u5148\u7ea7\u548c\u5e76\u53d1\u6570\uff1b\u7f51\u7edc\u5ef6\u8fdf\u591a\u89c1\u4e8e\u591a\u673a\u623f\u90e8\u7f72\uff0c\u5efa\u8bae\u540c IDC \u90e8\u7f72\uff1b\u5ba2\u6237\u7aef\u7f13\u5b58\u53c2\u6570\u5f71\u54cd\u8bfb\u5199\u5ef6\u8fdf\uff0c\u6309\u4e1a\u52a1\u573a\u666f\u8c03\u6574\u3002\u957f\u671f\u76d1\u63a7\u548c\u544a\u8b66\u662f\u9884\u9632\u5ef6\u8fdf\u95ee\u9898\u7684\u5173\u952e\uff0c\u5efa\u8bae\u5728 Hostease \u8fd9\u7c7b\u4e91\u670d\u52a1\u5668\u73af\u5883\u90e8\u7f72\u76d1\u63a7\u544a\u8b66\uff0c\u628a RBD \u5ef6\u8fdf\u7eb3\u5165\u4e1a\u52a1 SLA \u76d1\u63a7\u8303\u56f4\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4ece OSD \u72b6\u6001\u3001PG \u5206\u5e03\u548c\u7f51\u7edc\u5ef6\u8fdf\u4e09\u4e2a\u7ef4\u5ea6\u6392\u67e5 Ceph RBD \u5757\u5b58\u50a8\u5ef6\u8fdf\u95ee\u9898\uff0c\u8bf4\u660e\u5982\u4f55\u5b9a\u4f4d\u6839\u56e0\u548c\u4fee\u590d\u3002<\/p>\n","protected":false},"author":2,"featured_media":32585,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[3822],"tags":[4808,4809,111,4810,4044],"class_list":["post-32588","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-guides","tag-cephrbd","tag-osd","tag-111","tag-4810","tag-4044"],"aioseo_notices":[],"jetpack_featured_media_url":"https:\/\/cn.hostease.com\/blog\/wp-content\/uploads\/2026\/08\/ceph-rbd-latency-osd-cover.webp","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/posts\/32588","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/comments?post=32588"}],"version-history":[{"count":1,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/posts\/32588\/revisions"}],"predecessor-version":[{"id":32589,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/posts\/32588\/revisions\/32589"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/media\/32585"}],"wp:attachment":[{"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/media?parent=32588"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/categories?post=32588"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/tags?post=32588"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}