{"id":447,"date":"2019-09-24T11:06:52","date_gmt":"2019-09-24T03:06:52","guid":{"rendered":"https:\/\/www.myway5.com\/?p=447"},"modified":"2023-07-05T21:40:55","modified_gmt":"2023-07-05T13:40:55","slug":"ceph","status":"publish","type":"post","link":"https:\/\/www.myway5.com\/index.php\/2019\/09\/24\/ceph\/","title":{"rendered":"ceph\u67b6\u6784\u7814\u7a76"},"content":{"rendered":"<p>\u8fd9\u7bc7\u6587\u7ae0\u7684\u7edd\u5927\u591a\u6570\u5185\u5bb9\u90fd\u662f\u5b98\u7f51\u539f\u6587\u7684\u7ffb\u8bd1\uff1a<a class=\"wp-editor-md-post-content-link\" href=\"https:\/\/docs.ceph.com\/docs\/master\/architecture\/\">Ceph Architecture<\/a><\/p>\n<h2>ceph\u662f\u4ec0\u4e48<\/h2>\n<p>ceph\u662f\u4e00\u4e2a\u5206\u5e03\u5f0f\u7684\u6587\u4ef6\u5b58\u50a8\u7cfb\u7edf\uff0c\u5b83\u63d0\u4f9b\u4e86\u4ee5\u4e0b\u4e09\u79cd\u5b58\u50a8\u80fd\u529b\uff1a<\/p>\n<ul>\n<li>\u5757\u8bbe\u5907\u5b58\u50a8(block device)<\/li>\n<li>\u6587\u4ef6\u7cfb\u7edf\u5b58\u50a8(filesystem)<\/li>\n<li>\u5bf9\u8c61\u5b58\u50a8(object storage)<\/li>\n<\/ul>\n<p>\u56e0\u6b64\u5982\u679c\u4f60\u9700\u8981\u591a\u79cd\u5b58\u50a8\u65b9\u6848\u7684\u8bdd\uff0cceph\u662f\u4e00\u4e2a\u975e\u5e38\u597d\u7684\u9009\u62e9\u3002\u8fd9\u51e0\u79cd\u5b58\u50a8\u65b9\u6848\u7684\u5dee\u522b\u662f\u4ec0\u4e48\u5462\uff1f<\/p>\n<p><strong>\u5757\u8bbe\u5907\u5b58\u50a8<\/strong>\u662f\u5c06\u5e95\u5c42\u7684\u5b58\u50a8\u80fd\u529b\u4ee5\u903b\u8f91\u786c\u76d8\u7684\u65b9\u5f0f\u66b4\u9732\u7ed9\u4e3b\u673a\u4f7f\u7528\u3002\u4e3b\u673a\u53ea\u611f\u77e5\u5230\u5355\u5757\u7269\u7406\u786c\u76d8\u7684\u6302\u8f7d\uff0c\u5e95\u5c42\u7684\u590d\u6742\u673a\u5236\u90fd\u88ab\u5c4f\u853d<\/p>\n<p><strong>\u5bf9\u8c61\u5b58\u50a8<\/strong>\u662f\u5c06\u6587\u4ef6\u62bd\u8c61\u6210\u5bf9\u8c61\uff0c\u7136\u540e\u901a\u8fc7\u7f51\u7edc\u63a5\u53e3(\u6bd4\u5982s3\u7684api)\u6765\u5bf9\u6587\u4ef6\u8fdb\u884c\u64cd\u4f5c(put,get,delete\u7b49)\u3002<\/p>\n<p><strong>\u6587\u4ef6\u7cfb\u7edf\u5b58\u50a8<\/strong>\u662f\u50cfFTP\uff0cNFS\u8fd9\u79cd\uff0c\u53ef\u4ee5\u5c06ceph\u7684\u5b58\u50a8\u80fd\u529b\u5f53\u6210\u666e\u901a\u7684\u6587\u4ef6\u7cfb\u7edf\u6765\u4f7f\u7528\uff0c\u4e5f\u652f\u6301cd, ls\u8fd9\u6837\u7684\u6587\u4ef6\u7cfb\u7edf\u547d\u4ee4\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2019\/09\/ceph-filesystem.png\" alt=\"ceph filesystem\" \/><\/p>\n<h2>ceph \u67b6\u6784\u4e00\u89c8<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2019\/09\/ceph-arch.png\" alt=\"ceph arch\" \/><\/p>\n<p>\u901a\u8fc7\u4e0a\u56fe\u53ef\u4ee5\u770b\u51fa\uff0cceph\u7684\u5e95\u5c42\u6838\u5fc3\u662f<code>RADOS<\/code>\uff0c\u7136\u540e\u901a\u8fc7<code>LIBRADOS<\/code>\u548c<code>CEPHFS<\/code>\u4ee5\u53ca\u57fa\u4e8eLIBRADOS\u7684<code>RADOSGW<\/code>, <code>RBD<\/code>\u5bf9\u5916\u63d0\u4f9b\u5b58\u50a8\u529f\u80fd\u3002<\/p>\n<h2>ceph \u5b58\u50a8\u96c6\u7fa4<\/h2>\n<p>ceph\u57fa\u4e8e<code>RADOS<\/code>\u63d0\u4f9b\u4e86\u65e0\u9650\u7684\u53ef\u6269\u5c55\u7684\u5b58\u50a8\u96c6\u7fa4\u3002\u5173\u4e8eRADOS\u7684\u77e5\u8bc6\u53ef\u4ee5\u770b\u8fd9\u7bc7\u8bba\u6587\uff1a <a class=\"wp-editor-md-post-content-link\" href=\"https:\/\/ceph.com\/wp-content\/uploads\/2016\/08\/weil-rados-pdsw07.pdf\">RADOS &#8211; A Scalable, Reliable Storage Service for Petabyte-scale Storage Clusters<\/a><\/p>\n<p>\u4e00\u4e2aCeph\u5b58\u50a8\u96c6\u7fa4\u5305\u62ec\u4e24\u7c7b\u5e38\u9a7b\u670d\u52a1:<\/p>\n<ul>\n<li>Ceph Monitor<\/li>\n<li>Ceph OSD Daemon<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2019\/09\/ceph-daemons.png\" alt=\"ceph daemons\" \/><\/p>\n<p>Ceph Monitor\u7ef4\u62a4\u4e86\u4e00\u4e2a\u5173\u4e8e\u96c6\u7fa4\u4fe1\u606f\u6620\u5c04\u7684\u4e3b\u526f\u672c\u3002Ceph monitors\u96c6\u7fa4\u4fdd\u8bc1\u4e86\u5728\u4e00\u4e2amonitor\u670d\u52a1\u505c\u6b62\u65f6\u7684\u9ad8\u53ef\u7528\u6027\u3002\u5b58\u50a8\u96c6\u7fa4\u5ba2\u6237\u7aef\u4eceCeph Monitor\u83b7\u53d6\u4e00\u4efd\u96c6\u7fa4\u4fe1\u606f\u6620\u5c04\u7684\u62f7\u8d1d\u3002<\/p>\n<p>Ceph OSD\u670d\u52a1\u8d1f\u8d23\u68c0\u67e5\u81ea\u8eab\u7684\u72b6\u6001\u4ee5\u53ca\u5176\u4ed6OSD\u7684\u72b6\u6001\uff0c\u7136\u540e\u6c47\u62a5\u7ed9monitors\u3002<\/p>\n<p>\u5b58\u50a8\u96c6\u7fa4\u5ba2\u6237\u7aef\u548c\u6bcf\u4e00\u4e2aCeph OSD\u670d\u52a1\u4f7f\u7528<code>CRUSH<\/code>\u7b97\u6cd5\u6765\u9ad8\u6548\u7684\u8ba1\u7b97\u6570\u636e\u4f4d\u7f6e\u7684\u4fe1\u606f\uff0c\u800c\u4e0d\u662f\u4f9d\u8d56\u4e8e\u4e00\u4e2a\u4e2d\u5fc3\u5316\u7684\u67e5\u627e\u8868\u3002librados\u662f\u4e00\u4e2a\u5f88\u91cd\u8981\u7684\u89d2\u8272\uff0c\u5b83\u63d0\u4f9b\u4e86Ceph\u7684\u9ad8\u5c42\u7279\u6027\uff0c\u4e00\u7cfb\u5217\u7684\u670d\u52a1\u63a5\u53e3\u90fd\u662f\u5efa\u8bbe\u5728librados\u4e0a\u5c42\u7684\u3002<\/p>\n<h3>\u5b58\u50a8\u6570\u636e<\/h3>\n<p>Ceph\u5b58\u50a8\u96c6\u7fa4\u4eceCeph\u5ba2\u6237\u7aef\u63a5\u53d7\u6570\u636e\uff0c\u8fd9\u91cc\u7684\u5ba2\u6237\u7aef\u53ef\u4ee5\u662fCeph\u5757\u8bbe\u5907\u5b58\u50a8\uff0c\u5bf9\u8c61\u5b58\u50a8\uff0c\u6587\u4ef6\u7cfb\u7edf\u6216\u8005\u662f\u57fa\u4e8elibrados\u7684\u81ea\u5b9a\u4e49\u5b9e\u73b0\u3002librados\u5c06\u6570\u636e\u4f5c\u4e3a\u4e00\u4e2a\u5bf9\u8c61\u5b58\u50a8\u3002\u6bcf\u4e00\u4e2a\u5bf9\u8c61\u90fd\u5728\u6587\u4ef6\u7cfb\u7edf\u4e2d\u5bf9\u5e94\u4e00\u4e2a\u6587\u4ef6\uff0c\u8fd9\u4e9b\u6587\u4ef6\u5b58\u50a8\u5728\u5bf9\u8c61\u5b58\u50a8\u8bbe\u5907\u4e0a\u3002Ceph OSD\u670d\u52a1\u5728\u5b58\u50a8\u78c1\u76d8\u4e0a\u5904\u7406\u8fd9\u4e9b\u8bfb\u5199\u64cd\u4f5c\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2019\/09\/osd_handle_rw_op.png\" alt=\"osd handle read\/write operations\" \/><\/p>\n<p>Ceph OSD\u670d\u52a1\u5728\u4e00\u4e2a\u6241\u5e73\u7684\u547d\u540d\u7a7a\u95f4\u4e2d(\u6ca1\u6709\u76ee\u5f55\u7ed3\u6784)\u5b58\u50a8\u6240\u6709\u7684\u6570\u636e,\u6bcf\u4e2a\u6570\u636e\u90fd\u4f5c\u4e3a\u4e00\u4e2a\u5bf9\u8c61\u3002\u4e00\u4e2a\u5bf9\u8c61\u6709\u552f\u4e00\u6807\u8bc6\u7b26\uff0c\u4e8c\u8fdb\u5236\u6570\u636e\uff0c\u4ee5\u53ca\u6709\u4e00\u7cfb\u5217\u952e\u503c\u5bf9\u7684\u5143\u6570\u636e\u3002\u8fd9\u5b8c\u5168\u53d6\u51b3\u4e8eCeph\u5ba2\u6237\u7aef\u7684\u5b9e\u73b0\u3002\u4e3e\u4f8b\u6765\u8bf4\uff0cCephFS\u4f7f\u7528\u5143\u6570\u636e\u6765\u5b58\u50a8\u6587\u4ef6\u5c5e\u6027\uff0c\u6bd4\u5982\u6587\u4ef6\u62e5\u6709\u8005\uff0c\u521b\u5efa\u65e5\u671f\uff0c\u6700\u540e\u4fee\u6539\u65e5\u671f\u7b49\u7b49\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2019\/09\/object.png\" alt=\"ceph object\" \/><\/p>\n<blockquote><p>\n  \u6ce8\u610f: \u5bf9\u8c61ID\u662f\u5728\u6574\u4e2a\u96c6\u7fa4\u4e2d\u552f\u4e00\u7684\uff0c\u800c\u4e0d\u4ec5\u4ec5\u662f\u672c\u5730\u6587\u4ef6\u7cfb\u7edf\u3002\n<\/p><\/blockquote>\n<h3>\u6269\u5c55\u6027\u548c\u9ad8\u53ef\u7528<\/h3>\n<p>\u5728\u4f20\u7edf\u67b6\u6784\u4e2d\uff0c\u5ba2\u6237\u7aef\u548c\u4e00\u4e2a\u4e2d\u5fc3\u5316\u7684\u7ec4\u4ef6(\u6bd4\u5982gateway, broker, API, facade\u7b49)\u901a\u4fe1\u3002\u8fd9\u4e2a\u4e2d\u5fc3\u5316\u7ec4\u4ef6\u5728\u4e00\u4e2a\u590d\u6742\u7cfb\u7edf\u4e2d\u626e\u6f14\u4e86\u4e00\u4e2a\u5355\u70b9\u7684\u5165\u53e3\u3002\u8fd9\u5728\u6027\u80fd\u548c\u6269\u5c55\u6027\u4e0a\u90fd\u5bfc\u81f4\u4e86\u5c40\u9650\u6027\u2014\u2014\u2014\u2014\u5355\u70b9\u5931\u8d25\u3002\uff08\u6bd4\u5982\uff0c\u5982\u679c\u4e2d\u5fc3\u7ec4\u4ef6\u5b95\u673a\uff0c\u6574\u4e2a\u96c6\u7fa4\u90fd\u4e0d\u53ef\u7528\uff09\u3002<\/p>\n<p>Ceph\u6d88\u706d\u4e86\u8fd9\u4e2a\u4e2d\u5fc3\u5316\u7684\u5165\u53e3\uff0c\u8ba9\u5ba2\u6237\u7aef\u76f4\u63a5\u548cCeph OSD\u670d\u52a1\u901a\u4fe1\u3002Ceph OSD\u670d\u52a1\u5728\u5176\u4ed6Ceph\u8282\u70b9\u4e0a\u521b\u5efa\u5bf9\u8c61\u526f\u672c\u6765\u4fdd\u8bc1\u6570\u636e\u5b89\u5168\u548c\u9ad8\u53ef\u7528\u3002Ceph\u540c\u6837\u4f7f\u7528\u4e00\u4e2amonitor\u7684\u96c6\u7fa4\u6765\u4fdd\u8bc1\u9ad8\u53ef\u7528\u3002\u4e3a\u4e86\u6d88\u706d\u4e2d\u5fc3\u5316\uff0cCeph\u4f7f\u7528\u4e86\u4e00\u4e2a\u53eb\u505a<code>CRUSH<\/code>\u7684\u7b97\u6cd5\u3002<\/p>\n<h3>CRUSH\u4ecb\u7ecd<\/h3>\n<p>Ceph\u5ba2\u6237\u7aef\u548cCeph OSD\u670d\u52a1\u90fd\u4f7f\u7528<code>CRUSH<\/code>\u7b97\u6cd5\u6765\u9ad8\u6548\u7684\u8ba1\u7b97\u5bf9\u8c61\u5b58\u50a8\u4f4d\u7f6e\u4fe1\u606f\uff0c\u800c\u4e0d\u662f\u5fc5\u987b\u53d6\u51b3\u4e8e\u4e00\u4e2a\u4e2d\u5fc3\u5316\u7684\u67e5\u627e\u8868\u3002\u76f8\u6bd4\u4e8e\u4e4b\u524d\u7684\u65b9\u6848\uff0c<code>CRUSH<\/code>\u63d0\u4f9b\u4e86\u4e00\u4e2a\u66f4\u597d\u7684\u6570\u636e\u7ba1\u7406\u673a\u5236\uff0c\u901a\u8fc7\u6e05\u6670\u7684\u5c06\u5de5\u4f5c\u5206\u5e03\u5230\u96c6\u7fa4\u4e2d\u7684\u6240\u6709\u5ba2\u6237\u7aef\u548cOSD\u670d\u52a1\uff0c\u53ef\u4ee5\u8fbe\u5230\u5f88\u597d\u7684\u6269\u5c55\u6027\u3002<code>CRUSH<\/code>\u4f7f\u7528\u667a\u80fd\u7684\u6570\u636e\u590d\u5236\u6765\u4fdd\u8bc1\u7075\u6d3b\u6027\uff0c\u8fd9\u66f4\u9002\u7528\u4e8e\u8d85\u5927\u89c4\u6a21\u7684\u5b58\u50a8\u3002<\/p>\n<h3>\u96c6\u7fa4\u6620\u5c04\u8868<\/h3>\n<p>Ceph\u4f9d\u8d56\u4e8eCeph\u5ba2\u6237\u7aef\u548cOSD\u670d\u52a1\uff0c\u5b83\u4eec\u5305\u542b\u4e865\u4e2a\u6620\u5c04\u8868\u3002<\/p>\n<ul>\n<li><strong>\u76d1\u63a7\u6620\u5c04\u8868<\/strong>: \u5305\u542b\u96c6\u7fa4\u7684fsid\uff0c \u4f4d\u7f6e, \u540d\u5b57\u5730\u5740\u4ee5\u53ca\u6bcf\u4e2amonitor\u7684\u7aef\u53e3\u3002\u5b83\u540c\u6837\u8bb0\u5f55\u4e86\u5f53\u524d\u7684\u4ee3\u6570\uff0c\u6620\u5c04\u8868\u7684\u521b\u5efa\u65f6\u95f4\uff0c\u6700\u540e\u4e00\u6b21\u4fee\u6539\u65f6\u95f4\u3002\u53ef\u4ee5\u4f7f\u7528<code>ceph mon dump<\/code>\u6765\u67e5\u770b\u4e00\u4e2a\u76d1\u63a7\u8868<\/p>\n<\/li>\n<li>\n<p><strong>OSD\u6620\u5c04\u8868<\/strong>: \u5305\u542b\u96c6\u7fa4\u7684fsid, \u8fd9\u4e2a\u6620\u5c04\u8868\u7684\u521b\u5efa\u65f6\u95f4\u548c\u6700\u540e\u4fee\u6539\u65f6\u95f4\uff0cpools\u7684\u5217\u8868\uff0c\u526f\u672c\u6570\u91cf\uff0cPG\u6570\u91cf\uff0cOSD\u7684\u5217\u8868\u4ee5\u53ca\u4ed6\u4eec\u7684\u72b6\u6001\u3002\u4f7f\u7528<code>ceph osd dump<\/code>\u6765\u67e5\u770bosd\u8868\u3002<\/p>\n<\/li>\n<li>\n<p><strong>PG\u6620\u5c04\u8868<\/strong>: \u5305\u542bPG\u7248\u672c\u53f7, \u65f6\u95f4\u6233\uff0c\u6700\u65b0\u7684OSD\u6620\u5c04\u8868\u7684\u4ee3\u6570\uff0c\u5168\u6bd4\u7387\uff0c\u6bcf\u4e00\u4e2a\u653e\u7f6e\u7ec4\u7684\u8be6\u60c5\uff0c\u6bd4\u5982PG ID, Up Set, Acting Set,\u4ee5\u53caPG\u7684\u72b6\u6001(\u6bd4\u5982active + clean)\uff0c\u6bcf\u4e00\u4e2apool\u7684\u6570\u636e\u4f7f\u7528\u7edf\u8ba1\u4fe1\u606f\u3002<\/p>\n<\/li>\n<li>\n<p><strong>CRUSH\u6620\u5c04\u8868<\/strong>: \u5305\u542b\u5b58\u50a8\u8bbe\u5907\u7684\u5217\u8868\uff0c\u5931\u8d25\u57df\u7684\u5c42\u7ea7\uff08\u6bd4\u5982device,host,rack,row,room\u7b49)\uff0c\u5b58\u50a8\u6570\u636e\u65f6\u7684\u904d\u5386\u5c42\u7ea7\u7684\u89c4\u5219\u3002<\/p>\n<\/li>\n<li>\n<p><strong>MDS\u6620\u5c04\u8868<\/strong>: \u5305\u542b\u5f53\u524d\u7684MDS\u6620\u5c04\u8868\u7684\u4ee3\u6570\uff0c \u6620\u5c04\u8868\u7684\u521b\u5efa\u65f6\u95f4\uff0c\u6700\u540e\u4fee\u6539\u65f6\u95f4\u3002\u5b83\u540c\u6837\u5305\u542b\u5b58\u50a8\u5143\u6570\u636e\u7684\u6c60\uff0c\u5143\u6570\u636e\u670d\u52a1\u5668\u7684\u5217\u8868\uff0c\u90a3\u4e9b\u5143\u6570\u636e\u670d\u52a1\u5668\u662fup\u548cin\u7684\u3002\u6267\u884c<code>ceph fs dump<\/code>\u6765\u67e5\u770bMDS\u6620\u5c04\u8868\u3002<\/p>\n<\/li>\n<\/ul>\n<p>\u6bcf\u4e00\u4e2a\u6620\u5c04\u8868\u90fd\u5305\u542b\u5b83\u7684\u64cd\u4f5c\u72b6\u6001\u6539\u53d8\u7684\u53ef\u8fed\u4ee3\u5386\u53f2\u3002Ceph Monitors\u7ef4\u62a4\u4e00\u4e2a\u96c6\u7fa4\u6620\u5c04\u8868\u7684\u4e3b\u62f7\u8d1d\uff0c\u5305\u542b\u4e86\u96c6\u7fa4\u6210\u5458\uff0c\u72b6\u6001\uff0c\u6539\u53d8\uff0c\u4ee5\u53caCeph\u5b58\u50a8\u96c6\u7fa4\u7684\u5168\u5c40\u5065\u5eb7\u72b6\u6001\u3002<\/p>\n<h3>\u9ad8\u53ef\u7528\u7684\u76d1\u63a7\u670d\u52a1<\/h3>\n<p>\u5728Ceph\u5ba2\u6237\u7aef\u53ef\u4ee5\u8bfb\u6216\u5199\u6570\u636e\u524d\uff0c\u5b83\u4eec\u90fd\u5fc5\u987b\u548c\u4e00\u4e2aCeph\u76d1\u63a7\u670d\u52a1\u901a\u4fe1\u6765\u83b7\u53d6\u6700\u65b0\u7684\u96c6\u7fa4\u6620\u5c04\u8868\u7684\u62f7\u8d1d\u3002\u4e00\u4e2aCeph\u5b58\u50a8\u96c6\u7fa4\u53ef\u4ee5\u53ea\u6709\u4e00\u4e2aMonitor\u89d2\u8272\u3002\u5f53\u7136\uff0c\u8fd9\u4f1a\u5bfc\u81f4\u5355\u70b9\u5931\u8d25\u3002<\/p>\n<p>\u4e3a\u4e86\u589e\u52a0\u53ef\u9760\u6027\u548c\u9519\u8bef\u5bb9\u5fcd\uff0cCeph\u652f\u6301\u76d1\u63a7\u670d\u52a1\u7684\u96c6\u7fa4\u3002\u5728\u4e00\u4e2a\u76d1\u63a7\u670d\u52a1\u7684\u96c6\u7fa4\u4e2d\uff0c\u5ef6\u8fdf\u548c\u5176\u4ed6\u9519\u8bef\u4f1a\u5bfc\u81f4\u4e00\u4e2a\u6216\u591a\u4e2a\u76d1\u63a7\u670d\u52a1\u843d\u540e\u4e8e\u96c6\u7fa4\u7684\u5f53\u524d\u72b6\u6001\u3002\u56e0\u6b64\uff0cCeph\u5fc5\u987b\u5728\u5404\u4e2a\u76d1\u63a7\u670d\u52a1\u5b9e\u4f8b\u4e4b\u95f4\u5c31\u96c6\u7fa4\u72b6\u6001\u8fbe\u6210\u4e00\u81f4\u3002Ceph\u603b\u662f\u76f8\u4fe1\u5927\u591a\u6570\u7684\u76d1\u63a7\u670d\u52a1\u3002Paxos\u7b97\u6cd5\u88ab\u7528\u6765\u5c31\u5f53\u524d\u96c6\u7fa4\u72b6\u6001\u8fbe\u6210\u5171\u8bc6\u3002<\/p>\n<h3>\u9ad8\u53ef\u7528\u7684\u8ba4\u8bc1<\/h3>\n<p>\u4e3a\u4e86\u9274\u522b\u7528\u6237\u4ee5\u53ca\u9632\u6b62\u4e2d\u95f4\u4eba\u653b\u51fb\uff0cCeph\u63d0\u4f9b\u4e86<code>cephx<\/code>\u8ba4\u8bc1\u7cfb\u7edf\u6765\u8ba4\u8bc1\u7528\u6237\u548c\u540e\u53f0\u670d\u52a1\u3002<\/p>\n<blockquote><p>\n  cephx\u534f\u8bae\u4e0d\u81f4\u529b\u4e8e\u4f20\u8f93\u8fc7\u7a0b\u4e2d\u6570\u636e\u52a0\u5bc6(\u6bd4\u5982SSL\/TLS)\u6216\u8005\u662f\u5176\u4ed6\u7684\u52a0\u5bc6\u3002\n<\/p><\/blockquote>\n<p>Cephx\u4f7f\u7528\u5171\u4eab\u7684\u79d8\u94a5\u6765\u8ba4\u8bc1\uff0c\u8fd9\u610f\u5473\u7740\u5ba2\u6237\u7aef\u548c\u76d1\u63a7\u96c6\u7fa4\u90fd\u6709\u4e00\u4efd\u5ba2\u6237\u7aef\u79d8\u94a5\u7684\u62f7\u8d1d\u3002\u8ba4\u8bc1\u534f\u8bae\u9700\u8981\u53cc\u65b9\u90fd\u80fd\u8bc1\u660e\u7ed9\u5bf9\u65b9\u81ea\u5df1\u62e5\u6709\u8fd9\u4e2a\u79d8\u94a5\u7684\u62f7\u8d1d\uff0c\u4f46\u662f\u53c8\u4e0d\u80fd\u628a\u79d8\u94a5\u539f\u6587\u8bf4\u51fa\u6765\u3002\u8fd9\u63d0\u4f9b\u4e86\u4e24\u7aef\u7684\u9a8c\u8bc1\uff0c\u610f\u5473\u7740\u96c6\u7fa4\u786e\u4fe1\u7528\u6237\u6709\u8fd9\u4e2a\u79d8\u94a5\uff0c\u7528\u6237\u4e5f\u786e\u4fe1\u96c6\u7fa4\u6709\u8fd9\u4e2a\u79d8\u94a5\u3002<\/p>\n<p>Ceph\u7684\u4e00\u4e2a\u5173\u952e\u7684\u53ef\u6269\u5c55\u7684\u7279\u6027\u662f\u907f\u514d\u5bf9Ceph object store\u7684\u5b9e\u73b0\u6709\u4e2d\u5fc3\u5316\u63a5\u53e3\uff0c\u8fd9\u610f\u5473\u7740Ceph\u5ba2\u6237\u7aef\u5fc5\u987b\u80fd\u591f\u548cOSD\u76f4\u63a5\u901a\u4fe1\u3002\u4e3a\u4e86\u4fdd\u62a4\u6570\u636e\uff0cCeph\u63d0\u4f9b\u4e86<code>cephx<\/code>\u8ba4\u8bc1\u7cfb\u7edf\u3002<code>cephx<\/code>\u534f\u8bae\u7684\u673a\u5236\u548c<code>Kerberos<\/code>\u7c7b\u4f3c\u3002<\/p>\n<p>\u7528\u6237\u8c03\u7528Ceph\u5ba2\u6237\u7aef\u6765\u548c\u76d1\u63a7\u670d\u52a1\u5668\u901a\u4fe1\u3002\u548cKerberos\u4e0d\u540c\u7684\u662f\uff0c\u6bcf\u4e00\u4e2a\u76d1\u63a7\u670d\u52a1\u90fd\u53ef\u4ee5\u9a8c\u8bc1\u7528\u6237\u4ee5\u53ca\u5206\u53d1\u79c1\u94a5\uff0c\u6240\u4ee5\u5728\u4f7f\u7528<code>cephx<\/code>\u65f6\u4e0d\u518d\u6709\u5355\u70b9\u5931\u8d25\u6216\u74f6\u9888\u4e86\u3002\u76d1\u63a7\u670d\u52a1\u8fd4\u56de\u4e00\u4e2a\u8ba4\u8bc1\u6570\u636e\u7ed3\u6784\uff0c\u7c7b\u4f3c\u4e8eKerberos ticket\uff0c\u5305\u542b\u83b7\u53d6Ceph\u670d\u52a1\u7684\u4f1a\u8bdd\u79d8\u94a5\u3002\u4f1a\u8bdd\u79d8\u94a5\u88ab\u7528\u6237\u6c38\u4e45\u79d8\u94a5\u52a0\u5bc6\u8fc7\uff0c\u56e0\u6b64\u53ea\u6709\u7528\u6237\u53ef\u4ee5\u5411Ceph\u76d1\u63a7\u670d\u52a1\u8bf7\u6c42\u670d\u52a1\u3002\u4e4b\u540e\u5ba2\u6237\u7aef\u4f7f\u7528\u4f1a\u8bdd\u79d8\u94a5\u6765\u8bf7\u6c42\u5b83\u60f3\u8981\u7684\u670d\u52a1\uff0c\u76d1\u63a7\u670d\u52a1\u5411\u5ba2\u6237\u7aef\u63d0\u4f9b\u4e00\u4e2aticket\uff0c\u8fd9\u4e2aticket\u53ef\u4ee5\u5411OSD\u8ba4\u8bc1\u5ba2\u6237\u7aef\u6765\u5904\u7406\u6570\u636e\u3002<br \/>\nCeph Monitors\u548cOSD\u5171\u4eab\u79d8\u94a5\uff0c\u56e0\u6b64\u5ba2\u6237\u7aef\u53ef\u4ee5\u4f7f\u7528\u76d1\u63a7\u670d\u52a1\u63d0\u4f9b\u7684ticket\u548c\u4efb\u610f\u7684OSD\u6216\u5143\u6570\u636e\u670d\u52a1\u5668\u901a\u4fe1\u3002\u548cKerberos\u4e00\u6837\uff0ccephx ticket\u4f1a\u8fc7\u671f\uff0c\u56e0\u6b64\u653b\u51fb\u8005\u4e0d\u80fd\u4f7f\u7528\u8fc7\u671f\u7684ticket\u6216\u4f1a\u8bdd\u79d8\u94a5\u6765\u83b7\u53d6\u670d\u52a1\u3002<\/p>\n<p>\u4e3a\u4e86\u4f7f\u7528cephx\uff0c\u7ba1\u7406\u5458\u5fc5\u987b\u9996\u5148\u8bbe\u7f6e\u7528\u6237\u3002\u5728\u4e0b\u56fe\u4e2d\uff0cclient.admin\u8fd9\u4e2a\u7528\u6237\u4ece\u547d\u4ee4\u884c\u4e2d\u8c03\u7528<code>ceph auth get-or-create-key<\/code>\u6765\u751f\u6210\u7528\u6237\u540d\u548c\u79d8\u94a5\u3002Ceph\u7684\u8ba4\u8bc1\u7cfb\u7edf\u751f\u6210\u7528\u6237\u540d\u548c\u79d8\u94a5\uff0c\u5b58\u50a8\u4e00\u4efd\u62f7\u8d1d\u7ed9\u6240\u6709\u7684\u76d1\u63a7\u670d\u52a1\uff0c\u7136\u540e\u5c06\u7528\u6237\u79d8\u94a5\u4f20\u9001\u7ed9client.admin\u7528\u6237\u3002\u8fd9\u610f\u5473\u7740\u5ba2\u6237\u7aef\u548c\u76d1\u63a7\u670d\u52a1\u5171\u4eab\u540c\u4e00\u4e2a\u79d8\u94a5\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2019\/09\/request-create-user.png\" alt=\"request create user\" \/><\/p>\n<p>\u4e3a\u4e86\u901a\u8fc7\u76d1\u63a7\u670d\u52a1\u7684\u8ba4\u8bc1\uff0c\u5ba2\u6237\u7aef\u628a\u7528\u6237\u540d\u53d1\u9001\u7ed9\u76d1\u63a7\u670d\u52a1\uff0c\u76d1\u63a7\u670d\u52a1\u751f\u6210\u4e00\u4e2a\u4f1a\u8bdd\u94a5\u5319\uff0c\u4f7f\u7528\u79d8\u94a5\u9644\u52a0\u4e0a\u7528\u6237\u540d\u6765\u52a0\u5bc6\u3002\u4e4b\u540e\uff0c\u76d1\u63a7\u670d\u52a1\u628a\u52a0\u5bc6\u540e\u7684ticket\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef\u3002\u5ba2\u6237\u7aef\u4f7f\u7528\u5171\u4eab\u7684\u79d8\u94a5\u89e3\u5bc6\uff0c\u83b7\u53d6\u5230\u4f1a\u8bdd\u94a5\u5319\u3002\u4f1a\u8bdd\u94a5\u5319\u4e3a\u5f53\u524d\u7684\u4f1a\u8bdd\u63d0\u4f9b\u8ba4\u8bc1\u3002\u5ba2\u6237\u7aef\u4e4b\u540e\u8bf7\u6c42\u7531\u8fd9\u4e2a\u4f1a\u8bdd\u94a5\u5319\u7b7e\u540d\u7684ticket\u3002\u76d1\u63a7\u670d\u52a1\u751f\u6210ticket\uff0c\u4f7f\u7528\u7528\u6237\u79d8\u94a5\u52a0\u5bc6\u5e76\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef\u3002\u5ba2\u6237\u7aef\u89e3\u5bc6ticket\uff0c\u4f7f\u7528\u5b83\u6765\u7b7e\u540d\u7ed9OSD\u548c\u5143\u6570\u636e\u670d\u52a1\u5668\u7684\u8bf7\u6c42\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2019\/09\/client-to-osd.png\" alt=\"client to osd\" \/><\/p>\n<p>cephx\u534f\u8bae\u8ba4\u8bc1\u6bcf\u4e2a\u5728\u5ba2\u6237\u7aef\u673a\u5668\u548cCeph\u670d\u52a1\u5668\u4e4b\u95f4\u7684\u4f1a\u8bdd\u3002\u6bcf\u4e00\u4e2a\u5728\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u4e4b\u95f4\u53d1\u9001\u7684\u4fe1\u606f\uff0c\u90fd\u4f1a\u63a5\u8fde\u901a\u8fc7\u521d\u59cb\u5316\u8ba4\u8bc1\uff0c\u4f7f\u7528ticket\u7b7e\u540d\uff0c\u8fd9\u4e2a\u7b7e\u540d\u53ef\u4ee5\u7531\u76d1\u63a7\u670d\u52a1\uff0cOSD\u548c\u5143\u6570\u636e\u670d\u52a1\u5668\u7528\u4ed6\u4eec\u5171\u4eab\u7684\u79d8\u94a5\u6765\u9a8c\u8bc1\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2019\/09\/complete-process.png\" alt=\"complete process\" \/><\/p>\n<p>\u7531\u8fd9\u79cd\u8ba4\u8bc1\u63d0\u4f9b\u7684\u4fdd\u62a4\u662f\u5728Ceph\u5ba2\u6237\u7aef\u548cCeph\u670d\u52a1\u7aef\u4e4b\u95f4\u7684\u3002\u5728Ceph\u5ba2\u6237\u7aef\u4e4b\u5916\u8fd9\u4e2a\u8ba4\u8bc1\u662f\u4e0d\u7ba1\u7528\u7684\u3002\u5982\u679c\u7528\u6237\u901a\u8fc7\u8fdc\u7a0b\u8fde\u63a5\u5230Ceph\u5ba2\u6237\u7aef\u4e0a\uff0cCeph\u7684\u8ba4\u8bc1\u4e0d\u4f1a\u5e94\u7528\u5230\u8fd9\u4e2a\u8fdc\u7a0b\u8fde\u63a5\u4e0a\u3002<\/p>\n<h3>\u667a\u80fd\u7684\u540e\u53f0\u670d\u52a1\u9020\u5c31\u4e86\u8d85\u5927\u89c4\u6a21\u7684\u53ef\u6269\u5c55\u6027<\/h3>\n<p>\u5728\u5f88\u591a\u96c6\u7fa4\u67b6\u6784\u4e2d\uff0c\u96c6\u7fa4\u6210\u5458\u7684\u4e3b\u8981\u76ee\u7684\u662f\u901a\u8fc7\u4e00\u4e2a\u4e2d\u5fc3\u5316\u7684\u63a5\u53e3\u77e5\u9053\u54ea\u4e9b\u8282\u70b9\u53ef\u4ee5\u8bbf\u95ee\u3002\u7136\u540e\u4e2d\u5fc3\u5316\u7684\u63a5\u53e3\u901a\u8fc7\u4e8c\u6b21\u8f6c\u53d1\u6765\u63d0\u4f9b\u670d\u52a1\uff0c\u8fd9\u56de\u5bfc\u81f4\u5728pb\u7ea7\u522b\u5411eb\u7ea7\u522b\u6269\u5c55\u65f6\u6709\u5f88\u5927\u7684\u74f6\u9888\u3002<\/p>\n<p>Ceph\u6d88\u706d\u4e86\u8fd9\u4e2a\u74f6\u9888\uff1aCeph\u7684OSD\u670d\u52a1\u548cCeph\u5ba2\u6237\u7aef\u662f\u96c6\u7fa4\u611f\u77e5\u7684\u3002\u6bd4\u5982Ceph\u5ba2\u6237\u7aef\u3001Ceph OSD\u670d\u52a1\u90fd\u77e5\u9053\u96c6\u7fa4\u4e2d\u7684\u5176\u4ed6Ceph OSD\u670d\u52a1\u3002\u8fd9\u4f7f\u5f97Ceph OSD\u670d\u52a1\u53ef\u4ee5\u76f4\u63a5\u548c\u5176\u4ed6Ceph OSD\u670d\u52a1\u4ee5\u53caCeph\u76d1\u63a7\u670d\u52a1\u901a\u4fe1\u3002\u53e6\u5916\uff0c\u5b83\u4f7f\u5f97Ceph\u5ba2\u6237\u7aef\u53ef\u4ee5\u76f4\u63a5\u548cCeph OSD\u670d\u52a1\u76f4\u63a5\u901a\u4fe1\u3002<\/p>\n<p>\u8fd9\u79cd\u65b9\u6cd5\u4e5f\u6700\u5927\u5316\u7684\u5229\u7528\u4e86\u8282\u70b9\u7684CPU\u548cRAM, \u5e26\u6765\u4e86\u4ee5\u4e0b\u51e0\u4e2a\u4e3b\u8981\u7684\u597d\u5904\uff1a<\/p>\n<ul>\n<li>OSD \u4e3a\u5ba2\u6237\u7aef\u76f4\u63a5\u63d0\u4f9b\u670d\u52a1\uff1a\u56e0\u4e3a\u4efb\u4f55\u7f51\u7edc\u8bbe\u5907\u90fd\u6709\u6700\u5927\u5e76\u53d1\u8fde\u63a5\u7684\u74f6\u9888\uff0c\u4e00\u4e2a\u4e2d\u5fc3\u5316\u7684\u7cfb\u7edf\u5728\u9ad8\u6269\u5c55\u7684\u60c5\u51b5\u4e0b\u4f1a\u51fa\u73b0\u4e00\u4e2a\u5f88\u4f4e\u7684\u7269\u7406\u74f6\u9888\u3002\u901a\u8fc7\u8ba9Ceph\u5ba2\u6237\u7aef\u76f4\u63a5\u548cCeph OSD\u670d\u52a1\u901a\u4fe1, Ceph\u540c\u65f6\u589e\u52a0\u4e86\u6027\u80fd\u548c\u7cfb\u7edf\u5bb9\u91cf\uff0c\u5e76\u4e14\u89e3\u51b3\u4e86\u5355\u70b9\u5931\u8d25\u7684\u95ee\u9898\u3002Ceph\u5ba2\u6237\u7aef\u53ef\u4ee5\u7ef4\u62a4\u4e00\u4e2a\u548cCeph OSD\u670d\u52a1\u7684\u4f1a\u8bdd\uff0c\u800c\u4e0d\u662f\u4e00\u4e2a\u4e2d\u5fc3\u5316\u7684\u7cfb\u7edf\uff0c\u53ea\u8981\u5b83\u4eec\u9700\u8981\u8fd9\u6837\u505a\u3002<\/p>\n<\/li>\n<li>\n<p>OSD\u6210\u5458\u548c\u72b6\u6001\uff1aCeph OSD\u670d\u52a1\u52a0\u5165\u5230\u96c6\u7fa4\u4e2d\u5e76\u4e14\u6c47\u62a5\u5b83\u4eec\u7684\u72b6\u6001\u3002\u5728\u6700\u4f4e\u7ea7\u522b\u4e0a\uff0cCeph OSD\u670d\u52a1\u72b6\u6001\u662fup\u6216\u8005down\u7684\uff0c\u4ee3\u8868\u7740\u5b83\u662f\u5426\u80fd\u591f\u5904\u7406Ceph\u5ba2\u6237\u7aef\u7684\u8bf7\u6c42\u3002\u5982\u679cCeph OSD\u670d\u52a1\u662fdown\u7684\uff0c\u8fd9\u610f\u5473\u7740Ceph OSD\u670d\u52a1\u7684\u5f02\u5e38\u3002\u5982\u679cCeph OSD\u670d\u52a1\u4e0d\u5728\u8fd0\u884c(crash\u4e86)\uff0cCeph OSD\u670d\u52a1\u5c31\u4e0d\u80fd\u901a\u77e5Ceph\u76d1\u63a7\u670d\u52a1\u5b83\u505c\u6b62\u8fd0\u884c\u4e86\u3002OSD\u670d\u52a1\u5468\u671f\u6027\u7684\u7ed9Ceph\u76d1\u63a7\u670d\u52a1\u53d1\u9001\u6d88\u606f\uff0c\u5982\u679cCeph\u76d1\u63a7\u670d\u52a1\u5728\u7ea6\u5b9a\u7684\u5468\u671f\u5185\u6ca1\u6709\u6536\u5230OSD\u670d\u52a1\u7684\u6d88\u606f\uff0c\u5b83\u5c31\u628a\u8fd9\u4e2aOSD\u670d\u52a1\u6807\u8bb0\u4e3adown\u3002\u8fd9\u79cd\u673a\u5236\u53eb\u505afailsafe(failsafe\u53ef\u4ee5\u7406\u89e3\u53ef\u4ee5\u6545\u969c\u7684\u81ea\u52a8\u4fdd\u62a4\u88c5\u7f6e\uff0c\u5f53OSD\u51fa\u73b0\u6545\u969c\u4f1a\u81ea\u52a8\u5c06\u5176\u6392\u9664\u4ece\u800c\u907f\u514d\u5f15\u53d1\u66f4\u5927\u7684\u6545\u969c)\u3002\u5f53\u7136\uff0cOSD\u670d\u52a1\u4e5f\u4f1a\u67e5\u770b\u5b83\u76f8\u90bb\u7684OSD\u670d\u52a1\u662f\u5426\u505c\u6b62\uff0c\u7136\u540e\u6c47\u62a5\u7ed9Ceph\u76d1\u63a7\u670d\u52a1\u3002\u8fd9\u4fdd\u8bc1\u4e86Ceph\u76d1\u63a7\u670d\u52a1\u662f\u4e00\u4e2a\u8f7b\u91cf\u7ea7\u7684\u8fdb\u7a0b\uff08\u810f\u6d3b\u7d2f\u6d3b\u90fd\u88abOSD\u670d\u52a1\u505a\u4e86\uff09\u3002<\/p>\n<\/li>\n<li>\n<p>\u6570\u636e\u6e05\u7406\uff1a\u4f5c\u4e3a\u7ef4\u62a4\u6570\u636e\u4e00\u81f4\u6027\u548c\u6e05\u6d01\u5ea6\u7684\u4e00\u90e8\u5206\uff0cCeph OSD\u670d\u52a1\u53ef\u4ee5\u5728PG(placement group, \u653e\u7f6e\u7ec4)\u4e2d\u6e05\u7406\u5bf9\u8c61\u3002Ceph OSD\u670d\u52a1\u53ef\u4ee5\u5c06\u4e00\u4e2aPG\u4e2d\u7684\u5bf9\u8c61\u548c\u5b58\u50a8\u5728\u53e6\u4e00\u4e2aOSD\u670d\u52a1\u4e2d\u7684\u526f\u672c\u8fdb\u884c\u5143\u6570\u636e\u7684\u5bf9\u6bd4\u3002\u6e05\u7406\u64cd\u4f5c(\u901a\u5e38\u662f\u6bcf\u5929)\u4f1a\u627e\u51fabug\u6216\u6587\u4ef6\u7cfb\u7edf\u7684\u9519\u8bef\u3002Ceph OSD\u670d\u52a1\u540c\u6837\u4f1a\u6267\u884c\u66f4\u6df1\u5c42\u6b21\u7684\u6e05\u7406\uff0c\u901a\u8fc7\u5bf9\u5bf9\u8c61\u6267\u884c\u6309\u4f4d\u7684\u5bf9\u6bd4\u3002\u6df1\u5c42\u6b21\u7684\u6e05\u7406(\u901a\u5e38\u662f\u6bcf\u5468)\u4f1a\u627e\u5230\u786c\u76d8\u4e0a\u574f\u7684\u6247\u533a\u3002<\/p>\n<\/li>\n<li>\n<p>\u6570\u636e\u590d\u5236\uff1a\u50cfCeph\u5ba2\u6237\u7aef\u4e00\u6837\uff0cCeph OSD\u670d\u52a1\u4f7f\u7528CRUSH\u7b97\u6cd5\uff0c\u4f46\u662fCeph OSD\u670d\u52a1\u4f7f\u7528\u5b83\u6765\u8ba1\u7b97\u5bf9\u8c61\u7684\u526f\u672c\u5e94\u8be5\u5b58\u50a8\u5728\u54ea\u91cc\uff08\u6216\u8005\u662f\u91cd\u65b0\u8d1f\u8f7d\u5747\u8861\uff09\u3002\u5728\u4e00\u4e2a\u5178\u578b\u7684\u5199\u64cd\u4f5c\u573a\u666f\u4e0b\uff0c\u4e00\u4e2a\u5ba2\u6237\u7aef\u4f7f\u7528CRUSH\u7b97\u6cd5\u6765\u8ba1\u7b97\u5bf9\u8c61\u5b58\u50a8\u5728\u54ea\u91cc\uff0c\u5c06\u8fd9\u4e2a\u5bf9\u8c61\u6620\u5c04\u5230pool\u548cPG\u4e2d\uff0c\u7136\u540e\u67e5\u770bCRUSH\u6620\u5c04\u8868\u6765\u9274\u522bPG\u7ec4\u7684\u4e3bOSD\u670d\u52a1<\/p>\n<p>\u5ba2\u6237\u7aef\u5c06\u5bf9\u8c61\u5199\u5165\u5230\u4e3bOSD\u670d\u52a1\u7684PG\u7ec4\u4e2d\u3002\u4e4b\u540e\uff0c\u4e3bOSD\u643a\u5e26\u7740\u4ed6\u81ea\u5df1\u7684CRUSH\u6620\u5c04\u8868\u7684\u62f7\u8d1d\u5b58\u50a8\u5230\u7b2c\u4e8c\u548c\u7b2c\u4e09\u4e2aOSD\u670d\u52a1\u4e2d\uff0c\u8fd9\u662f\u4e3a\u4e86\u591a\u526f\u672c\u7684\u5907\u4efd\u3002\u4e00\u65e6\u5b83\u786e\u8ba4\u6570\u636e\u5b58\u50a8\u6210\u529f\u5c31\u8fd4\u56de\u7ed9\u5ba2\u6237\u7aef\u3002<\/p>\n<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2019\/09\/osd-write-for-replication.png\" alt=\"osd write for replication\" \/><\/p>\n<p>\u56e0\u4e3a\u6709\u8fd9\u6837\u7684\u6570\u636e\u590d\u5236\u7684\u80fd\u529b\uff0cCeph OSD\u670d\u52a1\u4f7f\u5f97Ceph\u5ba2\u6237\u7aef\u4e0d\u9700\u8981\u8d1f\u8d23\u8fd9\u4ef6\u4e8b\uff0c\u540c\u65f6\u4e5f\u80fd\u4fdd\u8bc1\u9ad8\u7684\u6570\u636e\u53ef\u7528\u6027\u548c\u6570\u636e\u5b89\u5168\u3002<\/p>\n<h2>\u52a8\u6001\u96c6\u7fa4\u7ba1\u7406<\/h2>\n<p>\u5728\u9ad8\u53ef\u7528\u548c\u53ef\u6269\u5c55\u6027\u7ae0\u8282\uff0c\u6211\u4eec\u89e3\u91ca\u4e86Ceph\u5982\u4f55\u4f7f\u7528CRUSH\u3001\u96c6\u7fa4\u611f\u77e5\u3001\u667a\u80fd\u670d\u52a1\u6269\u5c55\u4ee5\u53ca\u7ef4\u62a4\u9ad8\u53ef\u7528\u3002Ceph\u7684\u5173\u952e\u8bbe\u8ba1\u5c31\u662f\u81ea\u6cbb\u3001\u81ea\u6211\u6062\u590d\u3001\u667a\u80fdCeph OSD\u670d\u52a1\u3002\u4e0b\u9762\u6211\u4eec\u66f4\u6df1\u5165\u7684\u63a2\u7a76\u4e00\u4e0bCRUSH\u5982\u4f55\u5728\u73b0\u4ee3\u5316\u7684\u4e91\u5b58\u50a8\u67b6\u6784\u4e2d\u53d1\u6325\u4f5c\u7528\uff0c\u5305\u62ec\u5b58\u50a8\u6570\u636e\u3001\u96c6\u7fa4\u7684\u91cd\u65b0\u8d1f\u8f7d\u5747\u8861\u4ee5\u53ca\u52a8\u6001\u7684\u4ece\u9519\u8bef\u4e2d\u6062\u590d\u3002<\/p>\n<h3>\u5173\u4e8epool<\/h3>\n<p>Ceph\u5b58\u50a8\u7cfb\u7edf\u652f\u6301\u4e00\u4e2a\u53eb\u505a<code>pool<\/code>\u7684\u6982\u5ff5\uff0c\u8fd9\u662f\u5b58\u50a8\u5bf9\u8c61\u7684\u903b\u8f91\u5206\u533a\u3002<\/p>\n<p>Ceph\u5ba2\u6237\u7aef\u4eceCeph\u76d1\u63a7\u670d\u52a1\u4e2d\u83b7\u53d6\u96c6\u7fa4\u6620\u5c04\u8868\uff0c\u7136\u540e\u5411pool\u4e2d\u5199\u5165\u5bf9\u8c61\u3002pool\u7684\u5927\u5c0f\u6216\u526f\u672c\u6570\u91cf\u3001CRUSH\u7684\u89c4\u5219\u4ee5\u53caPG\u7684\u6570\u91cf\u51b3\u5b9a\u4e86Ceph\u5982\u4f55\u5b58\u50a8\u6570\u636e\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2019\/09\/how-crush-work.png\" alt=\"how crush work\" \/><\/p>\n<p>pool\u81f3\u5c11\u4f1a\u8bbe\u7f6e\u4ee5\u4e0b\u53c2\u6570\uff1a<\/p>\n<ul>\n<li>\u5bf9\u8c61\u7684\u62e5\u6709\u8005\/\u8bbf\u95ee\u6743\u9650<\/li>\n<li>PG\u7684\u6570\u91cf<\/li>\n<li>\u4f7f\u7528\u7684CRUSH\u89c4\u5219<\/li>\n<\/ul>\n<h3>\u6620\u5c04PG\u5230OSD<\/h3>\n<p>\u6bcf\u4e00\u4e2apool\u90fd\u6709\u4e00\u7cfb\u5217\u7684PG\u3002CRUSH\u52a8\u6001\u7684\u5c06PG\u6620\u5c04\u5230OSD\u4e2d\u3002\u5f53Ceph\u5ba2\u6237\u7aef\u5b58\u50a8\u5bf9\u8c61\uff0cCRUSH\u5c06\u4f1a\u6620\u5c04\u6bcf\u4e00\u4e2a\u5bf9\u8c61\u5230\u4e00\u4e2aPG\u4e2d\u3002<\/p>\n<p>\u5c06\u5bf9\u8c61\u6620\u5c04\u5230PG\u521b\u5efa\u4e86\u4e00\u4e2a\u4e2d\u95f4\u5c42\uff0c\u8fd9\u4e2a\u4e2d\u95f4\u5c42\u4f4d\u4e8eCeph OSD\u670d\u52a1\u548cCeph\u5ba2\u6237\u7aef\u4e2d\u95f4\u3002\u5728\u52a8\u6001\u7684\u5b58\u50a8\u5bf9\u8c61\u65f6\uff0cCeph\u5b58\u50a8\u7cfb\u7edf\u5fc5\u987b\u80fd\u591f\u589e\u957f\uff08\u6216\u6536\u7f29\uff09\u4ee5\u53ca\u91cd\u65b0\u8d1f\u8f7d\u5747\u8861\u3002\u5982\u679cCeph\u5ba2\u6237\u7aef\u77e5\u9053\u54ea\u4e2aCeph OSD\u670d\u52a1\u62e5\u6709\u54ea\u4e00\u4e2a\u5bf9\u8c61\uff0c\u8fd9\u5c31\u5bfc\u81f4Ceph\u5ba2\u6237\u7aef\u548cCeph OSD\u670d\u52a1\u7d27\u8026\u5408\u4e86\u3002\u76f8\u53cd\u7684\uff0cCRUSH\u7b97\u6cd5\u5c06\u6bcf\u4e00\u4e2a\u5bf9\u8c61\u6620\u5c04\u5230PG\uff0c\u7136\u540e\u5c06\u6bcf\u4e00\u4e2aPG\u6620\u5c04\u5230\u4e00\u4e2a\u6216\u591a\u4e2aOSD\u670d\u52a1\u3002\u8fd9\u4e2a\u4e2d\u95f4\u5c42\u5141\u8bb8\u5728\u6709\u65b0\u7684OSD\u670d\u52a1\u4ee5\u53ca\u65b0\u7684\u5e95\u5c42OSD\u8bbe\u5907\u4e0a\u7ebf\u65f6\uff0cCeph\u53ef\u4ee5\u52a8\u6001\u91cd\u65b0\u8d1f\u8f7d\u5747\u8861\u3002\u4e0b\u9762\u7684\u56fe\u8868\u6f14\u793a\u4e86CRUSH\u5982\u4f55\u6620\u5c04\u5bf9\u8c61\u5230PG\uff0c\u7136\u540e\u6620\u5c04PG\u5230OSD\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2019\/09\/crush-mapping.png\" alt=\"crush mapping\" \/><\/p>\n<p>\u5ba2\u6237\u7aef\u5728\u6709\u96c6\u7fa4\u6620\u5c04\u8868\u7684\u62f7\u8d1d\u548cCRUSH\u7b97\u6cd5\u7684\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u51c6\u786e\u7684\u8ba1\u7b97\u51fa\u5728\u8bfb\u53d6\u6216\u5199\u5165\u5bf9\u8c61\u65f6\u4f7f\u7528\u54ea\u4e00\u4e2aOSD\u3002<\/p>\n<h3>\u8ba1\u7b97PG ID<\/h3>\n<p>\u5f53\u4e00\u4e2aCeph\u5ba2\u6237\u7aef\u7ed1\u5b9a\u5230\u4e00\u4e2aCeph\u76d1\u63a7\u670d\u52a1\u65f6\uff0c\u5b83\u4f1a\u83b7\u53d6\u96c6\u7fa4\u6620\u5c04\u8868\u7684\u6700\u65b0\u62f7\u8d1d\u3002\u6709\u4e86\u8fd9\u4e2a\u96c6\u7fa4\u6620\u5c04\u8868\uff0c\u5ba2\u6237\u7aef\u77e5\u9053\u6240\u6709\u7684\u76d1\u63a7\u670d\u52a1\uff0cOSD\uff0c\u5143\u6570\u636e\u670d\u52a1\u3002\u7136\u800c\uff0c\u5b83\u5e76\u4e0d\u77e5\u9053\u4efb\u4f55\u5173\u4e8e\u5bf9\u8c61\u7684\u4f4d\u7f6e\u4fe1\u606f\u3002<\/p>\n<blockquote><p>\n  \u5bf9\u8c61\u4f4d\u7f6e\u9700\u8981\u8ba1\u7b97\n<\/p><\/blockquote>\n<p>\u5ba2\u6237\u7aef\u552f\u4e00\u9700\u8981\u7684\u8f93\u5165\u662f\u5bf9\u8c61ID\u548cpool\u3002\u8fd9\u5f88\u7b80\u5355\uff1aCeph\u5728\u547d\u540d\u7684pool\u4e2d\u5b58\u50a8\u6570\u636e\u3002\u5f53\u5ba2\u6237\u7aef\u5b58\u50a8\u4e00\u4e2a\u547d\u540d\u7684\u5bf9\u8c61\u65f6\uff0c\u5b83\u4f7f\u7528\u5bf9\u8c61\u540d\u3001\u4e00\u4e2a\u54c8\u5e0c\u7801\u3001pool\u4e2dPG\u7684\u6570\u91cf\u548cpool\u540d\u6765\u8ba1\u7b97PG\u3002Ceph\u5ba2\u6237\u7aef\u4f7f\u7528\u4ee5\u4e0b\u6b65\u9aa4\u6765\u8ba1\u7b97PG ID\u3002<\/p>\n<ul>\n<li>1.\u5ba2\u6237\u7aef\u8f93\u5165pool\u540d\u548c\u5bf9\u8c61ID(\u6bd4\u5982: pool=&#8221;liverpool&#8221;, object-id=&#8221;john&#8221;)<\/p>\n<\/li>\n<li>\n<p>2.Ceph\u83b7\u53d6\u5bf9\u8c61ID\uff0c\u7136\u540e\u505a\u4e00\u4e0b\u54c8\u5e0c\u64cd\u4f5c<\/p>\n<\/li>\n<li>\n<p>3.Ceph\u8ba1\u7b97\u54c8\u5e0c\u503c\u9664PG\u6570\u91cf\u7684\u4f59\u6570\uff0c(\u6bd4\u598258)\u5f97\u5230\u4e86PG ID<\/p>\n<\/li>\n<li>\n<p>4.Ceph\u83b7\u53d6\u7ed9\u5b9a\u7684pool\u540d\u7684pool ID(\u6bd4\u5982&#8221;liverpool&#8221;=4)<\/p>\n<\/li>\n<li>\n<p>5.Ceph\u5c06pool ID\u653e\u5728PG ID\u4e4b\u524d(\u6bd4\u59824.58)<\/p>\n<\/li>\n<\/ul>\n<p>\u5728\u4e00\u4e2a\u5fd9\u788c\u7684\u4f1a\u8bdd\u4e2d\uff0c\u8ba1\u7b97\u5bf9\u8c61\u4f4d\u7f6e\u8981\u6bd4\u6267\u884c\u5bf9\u8c61\u4f4d\u7f6e\u67e5\u8be2\u5feb\u5f88\u591a\u3002CRUSH\u7b97\u6cd5\u5141\u8bb8\u5ba2\u6237\u7aef\u8ba1\u7b97\u5bf9\u8c61\u5e94\u8be5\u5b58\u5728\u54ea\u91cc\uff0c\u8fd9\u4f7f\u5f97\u5ba2\u6237\u7aef\u53ef\u4ee5\u76f4\u63a5\u548c\u4e3bOSD\u670d\u52a1\u901a\u4fe1\uff0c\u5b58\u50a8\u6216\u83b7\u53d6\u5bf9\u8c61\u3002<\/p>\n<h3>peering and sets<\/h3>\n<p>\u5728\u4e4b\u524d\u7684\u7ae0\u8282\u4e2d\uff0c\u6211\u4eec\u63d0\u5230Ceph OSD\u670d\u52a1\u68c0\u67e5\u5f7c\u6b64\u7684\u5fc3\u8df3\uff0c\u7136\u540e\u6c47\u62a5\u7ed9Ceph\u76d1\u63a7\u670d\u52a1\u3002Ceph OSD\u505a\u7684\u53e6\u5916\u4e00\u4ef6\u4e8b\u53eb\u505a&#8221;\u7aa5\u63a2(peering)&#8221;\uff0c\u8fd9\u4f1a\u8ba9\u6240\u6709\u5b58\u50a8PG\u7684OSD\u5bf9PG\u4e2d\u7684\u5bf9\u8c61\u72b6\u6001\u8fbe\u6210\u4e00\u81f4\u3002\u4e8b\u5b9e\u4e0a\uff0cCeph OSD\u670d\u52a1\u4e5f\u4f1a\u6c47\u62a5&#8221;peering&#8221;\u7684\u5931\u8d25\u7ed9Ceph\u7684\u76d1\u63a7\u670d\u52a1\u3002Peering\u7684\u95ee\u9898\u901a\u5e38\u4f1a\u81ea\u6211\u89e3\u51b3\u3002<\/p>\n<blockquote><p>\n  \u5bf9\u72b6\u6001\u8fbe\u6210\u4e00\u81f4\u5e76\u4e0d\u610f\u5473\u7740PG\u6709\u6700\u65b0\u7684\u5185\u5bb9\n<\/p><\/blockquote>\n<p>Ceph\u5b58\u50a8\u96c6\u7fa4\u88ab\u8bbe\u7f6e\u6210\u4e00\u4e2a\u5bf9\u8c61\u81f3\u5c11\u6709\u4e24\u4e2a\u526f\u672c(\u6bd4\u5982, size=2)\uff0c\u8fd9\u662f\u6570\u636e\u5b89\u5168\u7684\u6700\u5c0f\u8981\u6c42\u3002\u4e3a\u4e86\u9ad8\u53ef\u7528\uff0cCeph\u5b58\u50a8\u96c6\u7fa4\u5e94\u8be5\u5b58\u50a8\u591a\u4e8e\u4e24\u4e2a\u7684\u526f\u672c(\u6bd4\u5982size=3\u5e76\u4e14\u6700\u5c0fsize=2)\u3002\u8fd9\u6837\u5b83\u5c31\u80fd\u5728\u7ef4\u62a4\u6570\u636e\u5b89\u5168\u7684\u65f6\u5019\u4ee5\u4e00\u4e2a\u964d\u7ea7\u72b6\u6001\u7ee7\u7eed\u8fd0\u884c\u3002<\/p>\n<h3>\u91cd\u65b0\u8d1f\u8f7d\u5747\u8861<\/h3>\n<p>\u5f53\u4f60\u6dfb\u52a0\u4e00\u4e2aCeph OSD\u670d\u52a1\u5230\u96c6\u7fa4\u4e2d\uff0c\u96c6\u7fa4\u6620\u5c04\u8868\u4f1a\u968f\u4e4b\u66f4\u65b0\u3002\u6839\u636e\u4e4b\u524d\u7684\u8ba1\u7b97PG ID\u7684\u65b9\u6cd5\uff0c\u8fd9\u4f1a\u6539\u53d8\u96c6\u7fa4\u6620\u5c04\u8868\u3002\u4e8e\u662f\uff0c\u5b83\u6539\u53d8\u4e86\u5bf9\u8c61\u7684\u4f4d\u7f6e\uff0c\u56e0\u4e3a\u5b83\u6539\u53d8\u4e86\u8ba1\u7b97\u7684\u4e00\u4e2a\u8f93\u5165\u53c2\u6570\u3002\u4e0b\u9762\u7684\u56fe\u6807\u63cf\u8ff0\u4e86\u91cd\u65b0\u8d1f\u8f7d\u5747\u8861\u7684\u8fc7\u7a0b\u3002\u6709\u4e00\u4e9b\u4f46\u4e0d\u662f\u6240\u6709\u7684PG\u4f1a\u4ece\u5df2\u5b58\u5728\u7684OSD\uff08OSD1\u548cOSD2)\u4e2d\u8fc1\u79fb\u5230\u65b0\u7684OSD(OSD3)\u4e2d\uff08\u8fd9\u4e2a\u8fc7\u7a0b\u867d\u7136\u770b\u4f3c\u5f88\u7b80\u5355\u7c97\u66b4\uff0c\u4f46\u5176\u5b9e\u5bf9\u5927\u578b\u7cfb\u7edf\u5f71\u54cd\u5f88\u5c0f\uff09\u3002\u5373\u4f7f\u5728\u91cd\u65b0\u8d1f\u8f7d\u5747\u8861\u7684\u8fc7\u7a0b\u4e2d\uff0cCRUSH\u4ecd\u7136\u662f\u7a33\u5b9a\u53ef\u9760\u7684\u3002\u5927\u591a\u6570PG\u4fdd\u7559\u5b83\u4eec\u539f\u6709\u7684\u914d\u7f6e\uff0c\u6bcf\u4e00\u4e2aOSD\u83b7\u53d6\u5230\u66f4\u591a\u7684\u53ef\u7528\u5bb9\u91cf\uff0c\u6240\u4ee5\u5728\u91cd\u65b0\u8d1f\u8f7d\u5747\u8861\u4e4b\u540e\u65b0\u7684OSD\u6ca1\u6709\u8d1f\u8f7d\u5cf0\u503c\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2019\/09\/ceph-rebalance.png\" alt=\"ceph rebalance\" \/><\/p>\n<h3>\u6570\u636e\u4e00\u81f4\u6027<\/h3>\n<p>\u4f5c\u4e3a\u7ef4\u62a4\u6570\u636e\u4e00\u81f4\u6027\u548c\u6e05\u6d01\u5ea6\u7684\u4e00\u90e8\u5206\uff0cCeph OSD\u540c\u6837\u53ef\u4ee5\u5728PG\u4e2d\u6e05\u7406\u5bf9\u8c61\u3002\u5173\u4e8eOSD\u5982\u4f55\u7ef4\u6301\u5404\u4e2a\u526f\u672c\u7684\u5bf9\u8c61\u4e00\u81f4\u6027\uff0c\u53ef\u4ee5\u53c2\u8003\u4e0a\u9762\u7684\u6570\u636e\u6e05\u7406\u3002<\/p>\n<h3>\u7ea0\u5220\u7801(erasure coding)<\/h3>\n<p>\u4e00\u4e2a\u7ea0\u5220\u7801pool\u5c06\u6bcf\u4e2a\u5bf9\u8c61\u5206\u6210K+M\u4e2a\u5757\u3002\u6570\u636e\u88ab\u5206\u4e3aK\u4e2a\u6570\u636e\u5757\u548cM\u4e2a\u7f16\u7801\u5757\u3002\u8fd9\u4e2apool\u88ab\u914d\u7f6e\u6210K+M\u7684\u5927\u5c0f\uff0c\u56e0\u6b64\u6bcf\u4e2a\u5757\u90fd\u53ef\u4ee5\u5b58\u5728\u4e00\u4e2aOSD\u4e0a\u3002\u5757\u7684\u6392\u5e8f\u4f5c\u4e3a\u5bf9\u8c61\u7684\u5c5e\u6027\u5b58\u50a8\u8d77\u6765\u3002<\/p>\n<p>\u4e3e\u4f8b\u6765\u8bf4\uff0c\u4e00\u4e2a\u4f7f\u75285\u4e2aOSD(K+M=5)\u7684\u7ea0\u5220\u7801pool\u53ef\u4ee5\u5bb9\u5fcd2\u5757\u6570\u636e\u7684\u4e22\u5931(M=2)\u3002<\/p>\n<h3>\u8bfb\u5199\u7f16\u7801\u5757<\/h3>\n<p>\u5f53\u4e00\u4e2a\u53eb\u505aNYAN\u7684\u5bf9\u8c61\u5305\u542b&#8221;ABCDEFGHI&#8221;\u7684\u5185\u5bb9\u88ab\u5199\u5165\u5230pool\u4e2d\uff0c\u64e6\u9664\u7f16\u7801\u529f\u80fd\u5c06\u5185\u5bb9\u5206\u62103\u4e2a\u6570\u636e\u5757\uff1a\u7b2c\u4e00\u90e8\u5206\u662fABC\uff0c\u7b2c\u4e8c\u90e8\u5206\u662fDEF\uff0c\u7b2c\u4e09\u90e8\u5206\u662fGHI\u3002\u5982\u679c\u5185\u5bb9\u957f\u5ea6\u4e0d\u662fK\u7684\u6574\u6570\u500d\uff0c\u4f1a\u88ab\u586b\u5145\u5185\u5bb9\u3002\u8fd9\u4e2a\u529f\u80fd\u540c\u6837\u521b\u5efa\u4e24\u4e2a\u7f16\u7801\u5757\uff1a\u7b2c4\u4e2a\u662fYXY\uff0c\u7b2c5\u4e2a\u662fQGC\u3002\u6bcf\u4e00\u4e2a\u5757\u90fd\u88ab\u5b58\u50a8\u5230\u4e00\u4e2aOSD\u4e2d\u3002\u8fd9\u4e9b\u5757\u4ee5\u540c\u6837\u7684\u540d\u5b57(NYAN)\u4ee5\u5bf9\u8c61\u7684\u5f62\u5f0f\u5b58\u50a8\u5728\u4e0d\u540c\u7684OSD\u4e0a\uff0c\u5757\u7684\u521b\u5efa\u987a\u5e8f\u5fc5\u987b\u4fdd\u7559\uff0c\u5b58\u50a8\u5bf9\u8c61\u7684\u5c5e\u6027\u4e2d(shard_t)\uff0c\u4f5c\u4e3a\u540d\u5b57\u7684\u989d\u5916\u8865\u5145\u3002\u57571\u5305\u542bABC\uff0c\u5b58\u50a8\u5728OSD5\u4e2d\uff0c\u57574\u5305\u542bYXY\u5b58\u50a8\u5728OSD3\u4e2d\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2019\/09\/erasure-conding.png\" alt=\"erasure conding\" \/><\/p>\n<p>\u5f53\u5bf9\u8c61NYAN\u4ece\u7ea0\u5220\u7801pool\u4e2d\u8bfb\u53d6\u65f6\uff0c\u89e3\u7801\u529f\u80fd\u8bfb\u53d6\u4e09\u4e2a\u5757: \u57571\u5305\u542bABC\uff0c\u57573\u5305\u542bGHI\uff0c\u57574\u5305\u542bYXY\u3002\u7136\u540e\u5b83\u91cd\u5efa\u4e86\u5bf9\u8c61\u7684\u539f\u59cb\u5185\u5bb9ABCDEFGHI\u3002\u8fd9\u4e2a\u89e3\u7801\u529f\u80fd\u88ab\u901a\u77e5\u57572\u548c\u57575\u662f\u7f3a\u5931\u7684\uff08\u5b83\u4eec\u88ab\u79f0\u4f5c&#8217;\u64e6\u9664&#8217;\uff09\u3002\u57575\u4e0d\u4f1a\u88ab\u8bfb\u53d6\u662f\u56e0\u4e3aOSD4\u4ece\u96c6\u7fa4\u4e2d\u9000\u51fa\u4e86\u3002\u4e00\u65e63\u4e2a\u5757\u88ab\u8bfb\u53d6\u89e3\u7801\u529f\u80fd\u5c31\u4f1a\u88ab\u8c03\u7528\uff0c\u800c\u6b64\u65f6OSD2\u56e0\u4e3a\u6700\u6162\u6240\u4ee5\u6839\u672c\u6ca1\u6709\u88ab\u8003\u8651\u8fdb\u6765\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2019\/09\/erasure-decode.png\" alt=\"erasure decode\" \/><\/p>\n<h3>\u4e2d\u65ad\u5b8c\u6574\u7684\u5199\u5165<\/h3>\n<p>\u5728\u4e00\u4e2a\u7ea0\u5220\u7801pool\u4e2d\uff0c\u4e3bOSD\u63a5\u53d7\u6240\u6709\u7684\u5199\u64cd\u4f5c\u3002\u5b83\u8d1f\u8d23\u7f16\u7801\u5185\u5bb9\u4e3aK+M\u5757\uff0c\u7136\u540e\u5c06\u5b83\u4eec\u53d1\u9001\u7ed9\u5176\u4ed6\u7684OSD\u3002\u5b83\u540c\u6837\u8d1f\u8d23\u7ef4\u62a4PG\u65e5\u5fd7\u7684\u7248\u672c\u53f7\u3002<\/p>\n<p>\u5728\u4e0b\u9762\u7684\u56fe\u8868\u4e2d\uff0c\u4e00\u4e2a\u7ea0\u5220\u7801\u7684PG\u88ab\u521b\u5efa\u6210K=2 M=1\uff0c\u5b83\u652f\u63013\u4e2aOSD\uff0c\u4e24\u4e2a\u5b58\u50a8K\uff0c\u4e00\u4e2a\u5b58\u50a8M\uff0c\u5206\u522b\u79f0\u4e3aOSD1\u3001OSD2\u3001OSD3\u3002\u4e00\u4e2a\u5bf9\u8c61\u88ab\u7f16\u7801\u4ee5\u53ca\u5b58\u50a8\u5728OSD\u4e2d\uff0c\u5757D1v1(\u6570\u636e\u5757\u5e8f\u53f71\uff0c\u7248\u672c1)\u5728OSD1\u4e0a\uff0c\u5757D2v1\u5728OSD2\u4e0a\uff0cC1v1(\u7f16\u7801\u5757\u5e8f\u53f71,\u7248\u672c1)\u5728OSD3\u4e0a\u3002\u6bcf\u4e00\u4e2aOSD\u4e0a\u7684PG\u65e5\u5fd7\u90fd\u662f\u552f\u4e00\u7684(1,1 \u662fepoch 1. version 1)<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2019\/09\/interrupted-full-writes.png\" alt=\"interrupted-fill-writes\" \/><\/p>\n<p>OSD1\u662f\u4e3b\u670d\u52a1\uff0c\u63a5\u53d7\u5ba2\u6237\u7aef\u7684\u5b8c\u6574\u7684\u5199\u5165\uff0c\u8fd9\u610f\u5473\u7740\u5199\u5165\u7684\u6570\u636e\u8981\u5b8c\u6574\u7684\u66ff\u6362\u5bf9\u8c61\u800c\u4e0d\u662f\u8986\u76d6\u4e00\u90e8\u5206\u3002\u7248\u672c2(v2)\u7684\u5bf9\u8c61\u88ab\u521b\u5efa\u6765\u8986\u76d6\u7248\u672c1(v1)\u3002OSD1\u5c06\u6570\u636e\u7f16\u7801\u52303\u5757: D1v2\u5728OSD1\u4e0a\uff0cD2v2\u5728OSD2\u4e0a\uff0cC1v2\u5728OSD3\u4e0a\u3002\u6bcf\u4e00\u4e2a\u5757\u90fd\u88ab\u53d1\u9001\u5230\u76ee\u6807OSD\u4e0a\u3002\u5f53OSD\u63a5\u53d7\u5230\u6d88\u606f\u8981\u5199\u5165\u6570\u636e\u5757\u65f6\uff0c\u5b83\u540c\u6837\u521b\u5efa\u4e00\u4e2a\u65b0\u7684PG\u65e5\u5fd7\u6765\u53cd\u6620\u8fd9\u4e2a\u6539\u53d8\u3002\u4e3e\u4f8b\u6765\u8bf4\uff0c\u53ea\u8981OSD3\u5b58\u50a8\u4e86C1V2\uff0c\u5b83\u6dfb\u52a01,2\u5230\u65e5\u5fd7\u4e2d\u3002\u56e0\u4e3aOSD\u662f\u5f02\u6b65\u5de5\u4f5c\u7684\uff0c\u5f53\u5176\u4ed6\u5757\u5df2\u7ecf\u5b58\u50a8\u597d\u4e86\uff08\u6bd4\u5982C1v1\u548cD1v1)\u4e00\u4e9b\u6570\u636e\u5757\u53ef\u80fd\u8fd8\u5728\u5904\u7406\uff08\u6bd4\u5982D2v2)\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2019\/09\/write-replace.png\" alt=\"write replace\" \/><\/p>\n<p>\u5982\u679c\u4e00\u5207\u987a\u5229\uff0c\u6570\u636e\u5757\u90fd\u4f1a\u88ab\u5b58\u50a8\uff0c\u65e5\u5fd7\u4e2d\u7684<code>last_complete<\/code>\u6307\u9488\u4f1a\u4ece1,1\u79fb\u52a8\u52301,2<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2019\/09\/full-write-success.png\" alt=\"full write success\" \/><\/p>\n<p>\u6700\u540e\uff0c\u4e4b\u524d\u7684\u7248\u672c\u90fd\u53ef\u4ee5\u88ab\u79fb\u9664\u4e86: OSD1\u4e0a\u7684D1v1\uff0cOSD2\u4e0a\u7684D2v1, OSD3\u4e0a\u7684C1v1<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2019\/09\/remove-previous-version.png\" alt=\"remove previous version\" \/><\/p>\n<p>\u4f46\u662f\u5982\u679c\u53d1\u751f\u4e86\u5f02\u5e38\uff0cOSD1\u5728D2v2\u4ecd\u7136\u5199\u5165\u7684\u65f6\u5019\u505c\u6b62\u4e86\uff0c\u5bf9\u8c61\u7684\u7248\u672c2\u53ea\u662f\u90e8\u5206\u5199\u5165\uff1aOSD3\u6709\u4e00\u4e2a\u5757\u4f46\u662f\u4e0d\u8db3\u4ee5\u6062\u590d\u3002\u5b83\u4e22\u5931\u4e86\u4e24\u4e2a\u5757: D1v2\u548cD2v2,\u4f46\u662f\u7ea0\u5220\u7801\u53c2\u6570K=2,M=1\u8981\u6c42\u81f3\u5c112\u4e2a\u5757\u662f\u53ef\u7528\u7684\uff0c\u624d\u80fd\u6062\u590d\u7b2c\u4e09\u4e2a\u5757\u3002OSD4\u6210\u4e3a\u65b0\u7684\u4e3b\u670d\u52a1\uff0c\u627e\u5230last_complete\u65e5\u5fd7\u662f1,1\uff0c\u8fd9\u5e94\u8be5\u662f\u6700\u65b0\u7684\u65e5\u5fd7\u4e86\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2019\/09\/osd4-online.png\" alt=\"osd4 online\" \/><\/p>\n<p>\u65e5\u5fd71,2\u88ab\u53d1\u73b0\u5728OSD3\u4e0a\uff0c\u8fd9\u548c\u5728OSD4\u4e0a\u5b58\u50a8\u7684\u6700\u65b0\u7248\u672c1,1\u4e0d\u4e00\u6837\u3001\u56e0\u6b641,2\u88ab\u53d6\u6d88\uff0cC1v2\u5757\u88ab\u79fb\u9664\u3002D1v1\u5757\u88ab\u89e3\u7801\u529f\u80fd\u91cd\u5efa\u51fa\u6765\u5b58\u5728OSD4\u4e0a\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2019\/09\/rebuild-on-osd4.png\" alt=\"rebuild-on-osd4\" \/><\/p>\n<h3>\u7f13\u5b58\u5206\u5c42<\/h3>\n<p>\u7f13\u5b58\u5c42\u63d0\u4f9b\u7ed9Ceph\u5ba2\u6237\u7aef\u66f4\u597d\u7684IO\u6027\u80fd\uff0c\u56e0\u4e3a\u4e00\u90e8\u5206\u6570\u636e\u662f\u5b58\u50a8\u5728\u7f13\u5b58\u4e2d\u7684\u3002\u7f13\u5b58\u5c42\u5305\u62ec\u521b\u5efa\u4e00\u4e2a\u5feb\u901f\/\u6602\u8d35\u7684\u5b58\u50a8\u8bbe\u5907\u7684pool\uff0c\u88ab\u914d\u7f6e\u6210\u7f13\u5b58\u5c42\uff0c\u4fbf\u5b9c\u7684\u5b58\u50a8\u8bbe\u5907\u88ab\u5f53\u6210\u5b58\u50a8\u5c42\u4f7f\u7528\u3002Ceph objecter\u8d1f\u8d23\u5904\u7406\u5c06\u5bf9\u8c61\u653e\u5728\u54ea\u91cc\uff0ctiering\u4ee3\u7406\u51b3\u5b9a\u4ec0\u4e48\u65f6\u5019\u5c06\u5bf9\u8c61\u4ece\u7f13\u5b58\u4e2d\u5199\u5165\u5230\u540e\u9762\u7684\u5b58\u50a8\u5c42\u3002\u56e0\u6b64\u7f13\u5b58\u5c42\u548c\u80cc\u540e\u7684\u5b58\u50a8\u5c42\u5bf9Ceph\u5ba2\u6237\u7aef\u662f\u5b8c\u5168\u900f\u660e\u7684\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2019\/09\/cache-tiering.png\" alt=\"cache tiering\" \/><\/p>\n<h2>ceph\u534f\u8bae<\/h2>\n<p>Ceph\u5ba2\u6237\u7aef\u4f7f\u7528\u672c\u5730\u7684\u534f\u8bae\u6765\u548cCeph\u5b58\u50a8\u96c6\u7fa4\u901a\u4fe1\u3002Ceph\u5c06\u5b83\u7684\u529f\u80fd\u6253\u5305\u5230librados\u5e93\u4e2d\uff0c\u56e0\u6b64\u4f60\u53ef\u4ee5\u521b\u5efa\u81ea\u5df1\u7684Ceph\u5ba2\u6237\u7aef\u3002\u4e0b\u9762\u7684\u56fe\u8868\u63cf\u8ff0\u4e86\u8fd9\u79cd\u57fa\u7840\u67b6\u6784\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2019\/09\/basic-arch.png\" alt=\"basic architecture\" \/><\/p>\n<h3>\u672c\u5730\u534f\u8bae\u548clibrados<\/h3>\n<p>\u73b0\u5728\u7684\u5e94\u7528\u7a0b\u5e8f\u9700\u8981\u4e00\u4e2a\u652f\u6301\u5f02\u6b65\u901a\u4fe1\u7684\u7b80\u5355\u7684\u5bf9\u8c61\u5b58\u50a8\u63a5\u53e3\u3002Ceph\u5b58\u50a8\u96c6\u7fa4\u63d0\u4f9b\u4e86\u8fd9\u6837\u7684\u4e00\u4e2a\u529f\u80fd\u3002\u63a5\u53e3\u63d0\u4f9b\u4e86\u76f4\u63a5\u7684\uff0c\u5e76\u884c\u7684\u5bf9\u8c61\u8bbf\u95ee\u529f\u80fd\u3002<\/p>\n<ul>\n<li>Pool\u64cd\u4f5c<\/li>\n<li>\u5feb\u7167\u548c\u5199\u65f6\u590d\u5236\u514b\u9686<\/li>\n<li>\u8bfb\u5199\u5bf9\u8c61-\u521b\u5efa\u548c\u79fb\u9664-\u6574\u4e2a\u5bf9\u8c61\u6216\u5b57\u8282\u8303\u56f4-\u8ffd\u52a0\u6216\u8005\u622a\u77ed<\/li>\n<li>\u521b\u5efa\/\u8bbe\u7f6e\/\u83b7\u53d6\/\u79fb\u9664 XATTRS<\/li>\n<li>\u521b\u5efa\/\u8bbe\u7f6e\/\u83b7\u53d6\/\u79fb\u9664 \u952e\u503c\u5bf9<\/li>\n<li>\u590d\u5408\u64cd\u4f5c\u548c\u4e8c\u6b21ack\u8bed\u4e49<\/li>\n<li>\u5bf9\u8c61\u7c7b<\/li>\n<\/ul>\n<h3>\u5bf9\u8c61\u76d1\u89c6\u548c\u901a\u77e5<\/h3>\n<p>\u5ba2\u6237\u7aef\u53ef\u4ee5\u6ce8\u518c\u4e00\u4e2a\u5bf9\u5bf9\u8c61\u7684\u6301\u4e45\u5173\u6ce8\uff0c\u4fdd\u6301\u4e00\u4e2a\u548c\u4e3bOSD\u7684\u4f1a\u8bdd\u6253\u5f00\u3002\u5ba2\u6237\u7aef\u53ef\u4ee5\u53d1\u9001\u901a\u77e5\u6d88\u606f\u548c\u4e00\u4e9b\u8d1f\u8f7d\u4fe1\u606f\u7ed9\u6240\u6709\u7684\u76d1\u89c6\u8005\uff0c\u7136\u540e\u6240\u6709\u76d1\u89c6\u5ba2\u6237\u7aef\u90fd\u4f1a\u6536\u5230\u901a\u77e5\u3002\u8fd9\u4f7f\u5f97\u5ba2\u6237\u7aef\u53ef\u4ee5\u4f7f\u7528\u4efb\u4f55\u5bf9\u8c61\u4f5c\u4e3a\u540c\u6b65\u901a\u4fe1\u901a\u9053\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2019\/09\/watch-notify.png\" alt=\"watch and notify\" \/><\/p>\n<h3>\u6570\u636e\u5206\u7247<\/h3>\n<p>\u5b58\u50a8\u8bbe\u5907\u90fd\u4f1a\u6709\u541e\u5410\u91cf\u7684\u9650\u5236\uff0c\u8fd9\u5bf9\u6027\u80fd\u548c\u53ef\u6269\u5c55\u6027\u90fd\u6709\u5f88\u5927\u7684\u5f71\u54cd\u3002\u5927\u591a\u6570\u5b58\u50a8\u7cfb\u7edf\u90fd\u652f\u6301\u5728\u591a\u4e2a\u5b58\u50a8\u8bbe\u5907\u4e0a\u5206\u522b\u5b58\u50a8\u6570\u636e\u7684\u4e00\u90e8\u5206\u7247\u6bb5\uff0c\u8fd9\u4f1a\u589e\u52a0\u541e\u5410\u91cf\u548c\u6027\u80fd\u3002\u6700\u5e38\u89c1\u7684\u5c31\u662fRAID\u4e86\uff0cCeph\u7684\u5206\u7247\u548cRAID 0\u7c7b\u4f3c\u3002<\/p>\n<p>Ceph\u63d0\u4f9b\u4e86\u4e09\u7c7b\u5ba2\u6237\u7aef: Ceph\u5757\u8bbe\u5907\u3001Ceph\u6587\u4ef6\u7cfb\u7edf\u3001Ceph\u5bf9\u8c61\u5b58\u50a8\u3002Ceph\u5ba2\u6237\u7aef\u8d1f\u8d23\u8f6c\u6362\u6570\u636e\u7ed9\u7528\u6237\uff08\u4e00\u4e2a\u5757\u8bbe\u5907\u955c\u50cf\uff0cRESTful\u5bf9\u8c61\uff0cCephFS\u6587\u4ef6\u7cfb\u7edf\u76ee\u5f55\uff09\u3002<\/p>\n<blockquote><p>\n  \u63d0\u793a: Ceph\u5b58\u50a8\u7684\u5bf9\u8c61\u4e0d\u4f1a\u88ab\u5206\u7247\u3002Ceph\u5bf9\u8c61\u5b58\u50a8\uff0cCeph\u5757\u8bbe\u5907,Ceph\u6587\u4ef6\u7cfb\u7edf\u5c06\u5b83\u4eec\u7684\u6570\u636e\u5206\u7247\u5b58\u50a8\u6210\u591a\u4e2aCeph\u5b58\u50a8\u7cfb\u7edf\u5bf9\u8c61\u3002Ceph\u5ba2\u6237\u7aef\u901a\u8fc7librados\u5199\u5165\u6570\u636e\u5fc5\u987b\u6267\u884c\u5206\u7247(\u4ee5\u53ca\u5e76\u884cio)\u624d\u80fd\u83b7\u53d6\u5206\u7247\u7684\u4f18\u70b9\u3002\n<\/p><\/blockquote>\n<p>\u6700\u7b80\u5355\u7684Ceph\u5206\u7247\u683c\u5f0f\u5305\u542b\u4e00\u4e2a\u5bf9\u8c61\u7684\u5206\u7247\u3002Ceph\u5ba2\u6237\u7aef\u5411\u5b58\u50a8\u5bf9\u8c61\u5199\u5165\u5206\u7247\u5355\u5143\uff0c\u76f4\u5230\u5bf9\u8c61\u8fbe\u5230\u4e86\u5b83\u7684\u6700\u5927\u5bb9\u91cf\uff0c\u7136\u540e\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5bf9\u8c61\u6765\u5b58\u50a8\u591a\u51fa\u6765\u7684\u6570\u636e\u5206\u7247\u3002\u8fd9\u79cd\u6700\u7b80\u5355\u7684\u65b9\u5f0f\u5bf9\u4e8e\u5c0f\u7684\u5757\u8bbe\u5907\u955c\u50cf\u3001s3\u6216swift\u5bf9\u8c61\u4ee5\u53caCephFS\u6587\u4ef6\u662f\u8db3\u591f\u7684\u3002\u5f53\u7136\uff0c\u8fd9\u79cd\u7b80\u5355\u7684\u65b9\u5f0f\u6ca1\u6709\u6700\u5927\u5316\u5229\u7528Ceph\u5206\u5e03\u5f0f\u5b58\u50a8\u6570\u636e\u7684\u4f18\u70b9\uff0c\u4e32\u884c\u7684\u65b9\u5f0f\u4e5f\u6ca1\u6709\u63d0\u5347\u6027\u80fd\u3002\u4e0b\u9762\u7684\u56fe\u6807\u63cf\u8ff0\u4e86\u8fd9\u79cd\u5f62\u5f0f\u7684\u5206\u7247:<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2019\/09\/simplest-strip.png\" alt=\"simplest strip\" 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\u901a\u8fc7\u5c06\u5199\u5165\u5206\u5e03\u5230\u591a\u4e2a\u5bf9\u8c61\u4e0a\uff0cCeph\u53ef\u4ee5\u51cf\u5c11\u6bcf\u4e2a\u786c\u76d8\u7684\u5bfb\u9053\u65f6\u95f4\uff0c\u7136\u540e\u5c06\u591a\u4e2a\u786c\u76d8\u7684\u541e\u5410\u91cf\u7ed3\u5408\u4ee5\u8fbe\u5230\u66f4\u5feb\u7684\u5199\u5165\uff08\u6216\u8bfb\u53d6\uff09\u901f\u5ea6\u3002<\/p>\n<blockquote><p>\n  \u6ce8\u610f\uff1a\u5206\u7247\u662f\u72ec\u7acb\u4e8e\u5bf9\u8c61\u590d\u5236\u7684\u3002\u56e0\u4e3aCRUSH\u5728OSD\u4e2d\u590d\u5236\u5bf9\u8c61\uff0c\u5206\u7247\u4e5f\u4f1a\u81ea\u52a8\u88ab\u590d\u5236\u3002\n<\/p><\/blockquote>\n<p>\u5728\u4e0b\u56fe\u4e2d\uff0c\u5ba2\u6237\u7aef\u6570\u636e\u88ab\u5206\u7247\u5230\u4e00\u4e2a\u5bf9\u8c61\u96c6\u5408\u4e2d\uff08\u5bf9\u8c61\u96c6\u54081\uff09\uff0c\u8fd9\u4e2a\u96c6\u5408\u5305\u542b4\u4e2a\u5bf9\u8c61\uff0c\u7b2c\u4e00\u4e2a\u5206\u7247\u5355\u5143\u662f\u4f4d\u4e8eobject 0 \u7684 strip unit0\uff0c\u7b2c4\u4e2a\u5206\u7247\u5355\u5143\u662f\u4f4d\u4e8eobject3\u7684strip unit3\u3002\u5f53\u5199\u5982\u7b2c4\u4e2a\u5206\u7247\u540e\uff0c\u5ba2\u6237\u7aef\u5224\u65ad\u5bf9\u8c61\u96c6\u5408\u662f\u5426\u6ee1\u4e86\u3002\u5982\u679c\u5bf9\u8c61\u96c6\u5408\u6ca1\u6709\u6ee1\uff0c\u5ba2\u6237\u7aef\u4f1a\u4ece\u7b2c\u4e00\u4e2a\u5bf9\u8c61\u7ee7\u7eed\u5199\u5165\u5206\u7247\u3002\u5982\u679c\u5bf9\u8c61\u96c6\u5408\u6ee1\u4e86\uff0c\u5ba2\u6237\u7aef\u91cd\u65b0\u521b\u5efa\u4e00\u4e2a\u5bf9\u8c61\u96c6\u5408(object set2)\u3002\u7136\u540e\u5f00\u59cb\u5199\u5165\u7b2c\u4e00\u4e2a\u5206\u7247(strip unit16)\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2019\/09\/strip-to-multiple-object.png\" alt=\"strip to multiple object\" \/><\/p>\n<p>\u4e0b\u9762\u662f\u4e09\u4e2a\u91cd\u8981\u7684\u53d8\u91cf\u51b3\u5b9a\u4e86Ceph\u5982\u4f55\u5bf9\u6570\u636e\u5206\u7247\uff1a<\/p>\n<ul>\n<li>\u5bf9\u8c61\u5927\u5c0f\uff1a Ceph\u5b58\u50a8\u7cfb\u7edf\u4e2d\u7684\u5bf9\u8c61\u6709\u4e00\u4e2a\u914d\u7f6e\u7684\u6700\u5927\u5bb9\u91cf\uff08\u6bd4\u59822MB, 4MB)\u3002\u8fd9\u4e2a\u5bf9\u8c61\u5927\u5c0f\u5e94\u8be5\u8db3\u591f\u5927\uff0c\u4ee5\u5bb9\u7eb3\u5f88\u591a\u4e2a\u5206\u7247\u5355\u5143\u3002<\/p>\n<\/li>\n<li>\n<p>\u5206\u7247\u5bbd\u5ea6\uff1a\u5206\u7247\u6709\u4e00\u4e2a\u914d\u7f6e\u7684\u5355\u5143\u5927\u5c0f\uff08\u6bd4\u598264kb)\u3002Ceph\u5ba2\u6237\u7aef\u5206\u5272\u6570\u636e\u6210\u540c\u6837\u5927\u5c0f\u7684\u5206\u7247\u5355\u5143\uff0c\u9664\u4e86\u6700\u540e\u4e00\u4e2a\u3002\u5206\u7247\u5bbd\u5ea6\u5e94\u8be5\u662f\u5bf9\u8c61\u5927\u5c0f\u7684\u4e00\u5c0f\u90e8\u5206\uff0c\u8fd9\u6837\u4e00\u4e2a\u5bf9\u8c61\u5c31\u53ef\u4ee5\u5305\u542b\u591a\u4e2a\u5206\u7247\u5355\u5143\u4e86\u3002<\/p>\n<\/li>\n<li>\n<p>\u5206\u7247\u6570\u91cf\uff1aCeph\u5ba2\u6237\u7aef\u5728\u6307\u5b9a\u5206\u7247\u6570\u91cf\u7684\u5bf9\u8c61\u4e0a\u5199\u5165\u4e00\u8fde\u4e32\u7684\u5206\u7247\u5355\u5143\u3002\u8fd9\u4e9b\u6307\u5b9a\u6570\u91cf\u7684\u5bf9\u8c61\u53eb\u505a\u4e00\u4e2a\u5bf9\u8c61\u96c6\u5408\u3002\u5728Ceph\u5ba2\u6237\u7aef\u5199\u5b8c\u5bf9\u8c61\u96c6\u5408\u4e2d\u7684\u6700\u540e\u4e00\u4e2a\u5bf9\u8c61\u540e\uff0c\u5b83\u53c8\u5f00\u59cb\u4ece\u5bf9\u8c61\u96c6\u5408\u4e2d\u7684\u7b2c\u4e00\u4e2a\u5bf9\u8c61\u5f00\u59cb\u5199\u5165\u3002<\/p>\n<blockquote><p>\n 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OSD\u670d\u52a1\u4e2d\u3002<\/p>\n<h2>Ceph\u5ba2\u6237\u7aef<\/h2>\n<p>Ceph\u5ba2\u6237\u7aef\u5305\u542b\u4e00\u7cfb\u5217\u7684\u670d\u52a1\u63a5\u53e3\uff0c\u5305\u62ec:<\/p>\n<ul>\n<li>\u5757\u8bbe\u5907\uff1a\u5757\u8bbe\u5907(RBD)\u670d\u52a1\u63d0\u4f9b\u53ef\u53d8\u5927\u5c0f\u7684\u3001\u7cbe\u7b80\u914d\u7f6e\u7684\u5757\u8bbe\u5907\uff0c\u5757\u8bbe\u5907\u652f\u6301\u5feb\u7167\u548c\u590d\u5236\u3002Ceph\u5728\u6574\u4e2a\u96c6\u7fa4\u4e2d\u5c06\u5757\u8bbe\u5907\u5206\u7247\u6765\u63d0\u9ad8\u6027\u80fd\u3002Ceph\u652f\u6301\u5185\u6838\u5bf9\u8c61(KO)\u548cQEMU\u7684\u7ba1\u7406\u7a0b\u5e8f\u76f4\u63a5\u4f7f\u7528librbd\u2014\u2014\u907f\u514d\u865a\u62df\u7cfb\u7edf\u7684\u5185\u6838\u5bf9\u8c61\u8fc7\u8f7d\u3002<\/p>\n<\/li>\n<li>\n<p>\u5bf9\u8c61\u5b58\u50a8\uff1a\u5bf9\u8c61\u5b58\u50a8(RGW)\u670d\u52a1\u63d0\u4f9bRESTful API\uff0c\u548cAmazon S3\u4ee5\u53caOpenStack Swift\u517c\u5bb9\u3002<\/p>\n<\/li>\n<li>\n<p>\u6587\u4ef6\u7cfb\u7edf\uff1a\u6587\u4ef6\u7cfb\u7edf(CephFS)\u670d\u52a1\u63d0\u4f9b\u4e86POSIX\u517c\u5bb9\u7684\u6587\u4ef6\u7cfb\u7edf\uff0c\u53ef\u4ee5\u4f7f\u7528<code>mount<\/code>\u8fd9\u6837\u7684\u547d\u4ee4\uff0c\u6216\u8005\u4f5c\u4e3a\u4e00\u4e2a\u7528\u6237\u7a7a\u95f4\u7684\u6587\u4ef6\u7cfb\u7edf\u3002<\/p>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>Ceph\u53ef\u4ee5\u8fd0\u884cOSD, MDS, \u76d1\u63a7\u670d\u52a1\u7684\u989d\u5916\u5b9e\u4f8b\uff0c\u8fd9\u4e9b\u4f1a\u63d0\u9ad8\u53ef\u6269\u5c55\u6027\u548c\u9ad8\u53ef\u7528\u6027\u3002\u4e0b\u9762\u7684\u56fe\u4ece\u9ad8\u5c42\u67b6\u6784\u4e0a\u63cf\u8ff0\u4e86\u8fd9\u4e2a\u60c5\u51b5\uff1a<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.myway5.com\/wp-content\/uploads\/2019\/09\/high-level-arch.png\" alt=\"high level architecture\" 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class=\"screen-reader-text\">ceph\u67b6\u6784\u7814\u7a76<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[90],"tags":[91,92],"class_list":["post-447","post","type-post","status-publish","format-standard","hentry","category-distributed-storage","tag-ceph","tag-92"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>ceph\u67b6\u6784\u7814\u7a76 - \u4e00\u53ea\u5b89\u9759\u7684\u732b<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.myway5.com\/index.php\/2019\/09\/24\/ceph\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" 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