{"id":2316,"date":"2020-08-29T18:10:06","date_gmt":"2020-08-29T10:10:06","guid":{"rendered":"https:\/\/tixbay.net\/?p=2316"},"modified":"2020-08-29T18:10:06","modified_gmt":"2020-08-29T10:10:06","slug":"%e5%85%b3%e4%ba%8eceph%e7%8e%b0%e7%8a%b6%e4%b8%8e%e6%9c%aa%e6%9d%a5%e7%9a%84%e4%b8%80%e4%ba%9b%e6%80%9d%e8%80%83","status":"publish","type":"post","link":"https:\/\/tixbay.net\/?p=2316","title":{"rendered":"\u5173\u4e8eCeph\u73b0\u72b6\u4e0e\u672a\u6765\u7684\u4e00\u4e9b\u601d\u8003"},"content":{"rendered":"\n

\u8f6c\u81ea\uff1ahttps:\/\/www.ustack.com\/blog\/sikao\/<\/p>\n\n\n\n

Ceph\u4ece2004\u5e74\u63d0\u4ea4\u4e86\u7b2c\u4e00\u884c\u4ee3\u7801\uff0c\u81f3\u4eca\u4e3a\u6b62\u5df2\u7ecf10\u5e74\u4e86\u3002\u8fd9\u4e2a\u8d77\u6e90\u4e8eSage\u535a\u58eb\u8bba\u6587\uff0c\u6700\u65e9\u81f4\u529b\u4e8e\u5f00\u53d1\u4e0b\u4e00\u4ee3\u9ad8\u6027\u80fd\u5206\u5e03\u5f0f\u6587\u4ef6\u7cfb\u7edf\u7684\u9879\u76ee\uff0c\u73b0\u5728\u4e5f\u6210\u4e3a\u4e86\u5f00\u6e90\u793e\u533a\u4f17\u4eba\u7686\u77e5\u7684\u660e\u661f\u9879\u76ee\u3002\u7279\u522b\u662f\u968f\u7740\u4e91\u8ba1\u7b97\u7684\u53d1\u5c55\uff0cCeph\u4e58\u4e0a\u4e86OpenStack\u7684\u6625\u98ce\uff0c\u53d7\u5230\u5404\u5927\u5382\u5546\u7684\u5f85\u89c1\uff0cIntel\u3001DreamHost\u3001SanDisk\u3001CISCO\u3001Yahoo\u7b49\u516c\u53f8\u90fd\u6216\u591a\u6216\u5c11\u7684\u53c2\u4e0e\u5176\u4e2d\u3002RedHat\u66f4\u662f\u4e00\u63b7\u5343\u91d1\uff0c\u76f4\u63a5\u7838\u4e861.75\u4ebf\u7f8e\u91d1\u5c06Sage\u521b\u5efa\u7684Inktank\u516c\u53f8\u53ca\u5176Ceph\u56e2\u961f\u6536\u5165\u56ca\u4e2d\uff0c\u5c06\u5176\u4f5c\u4e3aIaaS\u4e09\u5927\u7ec4\u4ef6\u8ba1\u7b97\u3001\u7f51\u7edc\u3001\u5b58\u50a8\u4e4b\u4e00\u3002<\/p>\n\n\n\n

\u5728\u8fd9\u5341\u5e74\u7684\u53d1\u5c55\u8fc7\u7a0b\u4e2d\uff0cCeph\u4f3c\u4e4e\u8d8a\u6765\u8d8a\u5411\u7740\u4e91\u8ba1\u7b97\u7684\u65b9\u5411\u9760\u62e2\uff0c\u6700\u5148\u7684CephFS\u6587\u4ef6\u7cfb\u7edf\u5df2\u7ecf\u4e0d\u518d\u662f\u5f00\u53d1\u91cd\u70b9\uff0c\u751a\u81f3\u5f00\u53d1\u5df2\u7ecf\u9677\u5165\u4e86\u505c\u6ede\u72b6\u6001\u3002\u800c\u4e0e\u865a\u62df\u5316\u76f8\u5173\u7684RBD\u3001RGW\u5219\u6210\u4e86\u53d1\u5c55\u91cd\u70b9\uff0c\u6210\u4e3a\u53d1\u5c55\u6700\u5feb\u7684\u6a21\u5757\u3002<\/strong>\u4f46\u662f\u4ece\u4ee3\u7801\u4e2d\u4ecd\u7136\u80fd\u591f\u770b\u5230\u5404\u79cd\u9057\u8ff9\uff0c\u4f3c\u4e4e\u5728\u544a\u8bc9\u540e\u6765\u4eba\u8fd9\u6bb5\u9976\u4e86\u4e00\u4e2a\u5927\u5f2f\u7684\u5386\u53f2\u3002<\/p>\n\n\n\n

Ceph\u53d1\u5c55\u73b0\u5728\u4ecd\u7136\u5feb\u7684\u773c\u82b1\u7f2d\u4e71\uff0c\u8ba9\u6211\u4eec\u6682\u65f6\u505c\u4e0b\u811a\u6b65\uff0c\u770b\u770b\u7ecf\u8fc7\u5341\u5e74\u53d1\u5c55\u540e\uff0c\u73b0\u5728Ceph\u7684\u4f18\u52bf\u4e0e\u7f3a\u70b9\u3002<\/p>\n\n\n\n

\u4e00\u3001\u4f18\u52bf<\/strong><\/p>\n\n\n\n

  1. CRUSH\u7b97\u6cd5<\/strong><\/li><\/ol>\n\n\n\n

    CRUSH\u7b97\u6cd5\u662fCeph\u6700\u521d\u7684\u4e24\u5927\u521b\u65b0\u4e4b\u4e00\uff08\u53e6\u4e00\u4e2a\u662f\u57fa\u4e8e\u52a8\u6001\u5b50\u6811\u5206\u533a\u7684\u5143\u6570\u636e\u96c6\u7fa4\uff09\uff0c\u4e5f\u662f\u6574\u4e2aRADOS\u7684\u57fa\u77f3\uff0c\u662fCeph\u6700\u5f15\u4ee5\u4e3a\u8c6a\u7684\u5730\u65b9\u3002<\/p>\n\n\n\n

    CRUSH\u5728\u4e00\u81f4\u6027\u54c8\u5e0c\u57fa\u7840\u4e0a\u5f88\u597d\u7684\u8003\u8651\u4e86\u5bb9\u707e\u57df\u7684\u9694\u79bb\uff0c\u80fd\u591f\u5b9e\u73b0\u5404\u7c7b\u8d1f\u8f7d\u7684\u526f\u672c\u653e\u7f6e\u89c4\u5219\uff0c\u4f8b\u5982\u8de8\u673a\u623f\u3001\u673a\u67b6\u611f\u77e5\u7b49\u3002\u540c\u65f6\uff0c CRUSH\u7b97\u6cd5\u652f\u6301\u526f\u672c\u548cEC\u4e24\u79cd\u6570\u636e\u5197\u4f59\u65b9\u5f0f\uff0c\u8fd8\u63d0\u4f9b\u4e86\u56db\u79cd\u4e0d\u540c\u7c7b\u578b\u7684Bucket\uff08Uniform, List, Tree, Straw\uff09\uff0c\u5145\u5206\u8003\u8651\u4e86\u5b9e\u9645\u751f\u4ea7\u8fc7\u7a0b\u4e2d\u786c\u4ef6\u7684\u8fed\u4ee3\u5f0f\u90e8\u7f72\u65b9\u5f0f\uff0c\u867d\u7136\u5b9e\u9645\u751f\u4ea7\u4e2d\u5927\u591a\u6570\u60c5\u51b5\u4e0b\u7684\u90fd\u662f\u53ea\u7528\u4e86\u4e00\u79cdStraw\u3002<\/strong><\/p>\n\n\n\n

    \u53e6\u5916\u6839\u636eSage\u7684\u8bba\u6587\uff0cCRUSH\u7b97\u6cd5\u5177\u6709\u76f8\u5f53\u597d\u7684\u53ef\u6269\u5c55\u6027\uff0c\u5728\u6570\u5343OSD\u7684\u60c5\u51b5\u4e0b\u4ecd\u7136\u80fd\u4fdd\u8bc1\u826f\u597d\u7684\u8d1f\u8f7d\u5e73\u8861\u3002\u4f46\u8fd9\u66f4\u591a\u662f\u7406\u8bba\u5c42\u9762\u7684\uff0c\u76ee\u524d\u8fd8\u6ca1\u6709\u4eba\u7ed9\u51fa\u5728\u6570PB\u89c4\u6a21\u7684\u751f\u4ea7\u73af\u5883\u4e2d\u7684\u6d4b\u8bd5\u7ed3\u679c\u3002<\/p>\n\n\n\n

    \u603b\u7684\u6765\u770b\uff0cCRUSH\u7b97\u6cd5\u4ecd\u7136\u662f\u76ee\u524d\u7ecf\u8fc7\u5b9e\u8df5\u68c0\u9a8c\u7684\u6700\u597d\u7684\u6570\u636e\u5206\u5e03\u7b97\u6cd5\u4e4b\u4e00\u3002<\/p>\n\n\n\n

    2. \u7edf\u4e00\u5b58\u50a8\u67b6\u6784<\/strong><\/p>\n\n\n\n

    Ceph\u6700\u521d\u8bbe\u8ba1\u7684RADOS\u662f\u4e3a\u5176\u5b9e\u73b0\u4e00\u4e2a\u9ad8\u6027\u80fd\u7684\u6587\u4ef6\u7cfb\u7edf\u670d\u52a1\u7684\uff0c\u5e76\u6ca1\u6709\u8003\u8651\u5bf9\u4e8e\u5757\u8bbe\u5907\u3001\u5bf9\u8c61\u5b58\u50a8\u7684\u652f\u6301\uff0c\u4e5f\u5c31\u6ca1\u6709\u4ec0\u4e48RBD\u3001RADOS GateWay\uff0c\u8ddf\u522b\u63d0OpenStack\u548cqemu\u4e4b\u7c7b\u7684\u4e86\u3002\u4f46\u8c01\u60f3\u65e0\u5fc3\u63d2\u67f3\u67f3\u6210\u836b\uff0c\u7531\u4e8e RADOS \u51fa\u8272\u7684\u8bbe\u8ba1\u548c\u72ec\u7acb\u7b80\u6d01\u7684\u8bbf\u95ee\u63a5\u53e3\uff0c\u518d\u52a0\u4e0aSage\u654f\u9510\u7684\u773c\u5149\uff0cCeph\u793e\u533a\u679c\u65ad\u63a8\u51fa\u4e86\u7528\u4e8e\u652f\u6301\u4e91\u8ba1\u7b97\u7684\u5206\u5e03\u5f0f\u5757\u5b58\u50a8RBD\u548c\u5206\u5e03\u5f0f\u5bf9\u8c61\u5b58\u50a8RADOS GateWay\uff0c\u5e76\u5c06\u5f00\u53d1\u4e2d\u5fc3\u5168\u9762\u8f6c\u5411\u4e91\u8ba1\u7b97\u9886\u57df\u3002<\/strong><\/p>\n\n\n\n

    \u4e0d\u5f97\u4e0d\u8bf4\uff0cRADOS\u7684\u8bbe\u8ba1\u8fd8\u662f\u975e\u5e38\u7684\u4f18\u79c0\u3002\u4ece\u67b6\u6784\u4e0a\u6765\u770b\uff0cRBD\u548cRADOSGateWay\u5b9e\u9645\u4e0a\u90fd\u53ea\u662fRADOS\u7684\u5ba2\u6237\u7aef\u800c\u5df2\uff0c\u4f46\u5f97\u76ca\u4e8eRADOS\u7684\u4f18\u79c0\u8bbe\u8ba1\uff0cRBD\u548cRADOSGateWay\u7684\u8bbe\u8ba1\u548c\u5b9e\u73b0\u90fd\u5f88\u7b80\u5355\uff0c\u4e0d\u9700\u8981\u8003\u8651\u6a2a\u5411\u6269\u5c55\u3001\u5197\u4f59\u3001\u5bb9\u707e\u3001\u8d1f\u8f7d\u5e73\u8861\u7684\u7b49\u590d\u6742\u7684\u5206\u5e03\u5f0f\u7cfb\u7edf\u95ee\u9898\uff0c\u540c\u65f6\u80fd\u591f\u63d0\u4f9b\u8db3\u591f\u591a\u7684\u7279\u6027\u548c\u8db3\u591f\u4f18\u79c0\u7684\u6027\u80fd\uff0c\u56e0\u6b64\u8fc5\u901f\u5f97\u5230\u4e86\u793e\u533a\u7684\u8ba4\u53ef\u3002\u53e6\u4e00\u65b9\u9762\uff0cCeph\u4e3aOpenStack\u63d0\u4f9b\u4e86\u826f\u597d\u7684\u652f\u6301\uff0c\u6210\u4e3a\u4e86\u76ee\u524d\u6700\u706b\u7684OpenStack\u5e95\u5c42\u5b58\u50a8\u7cfb\u7edf\u3002<\/strong>\u4e58\u7740\u4e91\u8ba1\u7b97\u548cOpenStack\u7684\u4e1c\u98ce\uff0cCeph\u4f5c\u4e3a\u4e00\u4e2a\u7edf\u4e00\u5b58\u50a8\u7cfb\u7edf\uff0c\u4f3c\u4e4e\u5927\u6709\u820d\u6211\u53d6\u8c01\u4e4b\u52bf\u3002<\/p>\n\n\n\n

    3.\u4e30\u5bcc\u7684\u7279\u6027<\/strong><\/p>\n\n\n\n

    Ceph\u7684\u7279\u6027\u4e0d\u53ef\u8c13\u4e0d\u591a\uff0c\u4ece\u5206\u5e03\u5f0f\u7cfb\u7edf\u6700\u57fa\u672c\u7684\u6a2a\u5411\u6269\u5c55\u3001\u52a8\u6001\u4f38\u7f29\u3001\u5197\u4f59\u5bb9\u707e\u3001\u8d1f\u8f7d\u5e73\u8861\u7b49\uff0c\u5230\u751f\u4ea7\u73af\u5883\u73af\u5883\u4e2d\u975e\u5e38\u5b9e\u7528\u7684\u6eda\u52a8\u5347\u7ea7\u3001\u591a\u5b58\u50a8\u6c60\u3001\u5ef6\u8fdf\u5220\u9664\u7b49\uff0c\u518d\u5230\u9ad8\u5927\u4e0a\u7684CephFS\u96c6\u7fa4\u3001\u5feb\u7167\u3001\u7ea0\u5220\u7801\u3001\u8de8\u5b58\u50a8\u6c60\u7f13\u5b58\u7b49\uff0c\u4e0d\u53ef\u8c13\u4e0d\u5f3a\u5927\u3002<\/strong><\/p>\n\n\n\n

    \u4f46\u662f\u5c31\u50cf\u5927\u591a\u6570\u5f00\u6e90\u7cfb\u7edf\u4e00\u6837\uff0cCeph\u7684\u57fa\u672c\u7279\u6027\uff0c\u6216\u8005\u8bf4\u771f\u6b63\u5728\u751f\u4ea7\u73af\u5883\u4e2d\u7528\u7684\u4e0a\u7684\u7279\u6027\u8fd8\u662f\u975e\u5e38\u9760\u8c31\u7684\uff0c\u4f46\u5176\u4ed6\u201c\u9ad8\u7ea7\u201d\u7279\u6027\u5c31\u53ea\u80fd\u6253\u4e00\u4e2a\u95ee\u53f7\u4e86\u3002\u7279\u522b\u662f\u5728CephFS\u6a21\u5757\uff0c\u7531\u4e8eCeph\u793e\u533a\u76ee\u524d\u7684\u5f00\u53d1\u91cd\u70b9\u4e3b\u8981\u8fd8\u662f\u4e0e\u4e91\u8ba1\u7b97\u76f8\u5173\u7684\u90e8\u5206\uff0c\u5373RBD\u548cRADOSGateWay\uff0c\u5bfc\u81f4CephFS\u7684\u5f00\u53d1\u505c\u6ede\u4e86\u5f88\u4e45\uff0c\u76f8\u5173\u7684\u7279\u6027\uff0c\u4f8b\u5982\u5143\u6570\u636e\u96c6\u7fa4\u3001\u5feb\u7167\u7b49\uff0c\u76ee\u524d\u90fd\u4e0d\u6ee1\u8db3\u751f\u4ea7\u73af\u5883\u7684\u8981\u6c42\u3002<\/p>\n\n\n\n

    \u4e8c\u3001\u7f3a\u70b9<\/strong><\/p>\n\n\n\n

    1. \u4ee3\u7801\u8d28\u91cf<\/strong><\/li><\/ol>\n\n\n\n

      \u4ee3\u7801\u8d28\u91cf\u7684\u95ee\u9898\uff0c\u5b9e\u9645\u4e0a\u662f\u4e2a\u4ec1\u8005\u89c1\u4ec1\u667a\u8005\u89c1\u667a\u7684\u95ee\u9898\u3002<\/p>\n\n\n\n

      Ceph\u4e3b\u8981\u4f7f\u7528C\/C++\u8bed\u8a00\u7f16\u5199\uff0c\u540c\u65f6\u5916\u56f4\u7684\u5f88\u591a\u811a\u672c\u548c\u5de5\u5177\u7528\u4e86Python\u3002<\/strong>\u4e4b\u6240\u4ee5\u8981\u8bf4\u660eCeph\u7684\u8bed\u8a00\u6784\u6210\uff0c\u662f\u56e0\u4e3a\u4ee3\u7801\u8d28\u91cf\u5b9e\u9645\u4e0a\u662f\u548c\u8bed\u8a00\u5177\u6709\u5bc6\u5207\u7684\u5173\u7cfb\u3002\u4e0d\u5426\u8ba4\u7528C++\u4e5f\u80fd\u5199\u51fa\u4f18\u96c5\u7684\u4ee3\u7801\uff0c\u4f46\u76f8\u6bd4\u4e8e\u66f4\u52a0\u201c\u73b0\u4ee3\u201d\u7684\u8bed\u8a00\uff0c\u8981\u60f3\u5199\u51fa\u5177\u5907\u540c\u6837\u53ef\u8bfb\u6027\u3001\u7ed3\u6784\u826f\u597d\u3001\u8c03\u7406\u6e05\u6670\u4ee3\u7801\uff0cC++\u8981\u56f0\u96be\u5f88\u591a\u3002\u4f46\u662f\uff0c\u7531\u4e8e\u5b58\u50a8\u4f5c\u4e3a\u5e95\u5c42\u7cfb\u7edf\uff0c\u5bf9\u6548\u7387\u7684\u8ffd\u6c42\u662f\u65e0\u6b62\u5883\u7684\uff0c\u56e0\u6b64\u4e0d\u592a\u53ef\u80fd\u820d\u5f03\u5bf9\u4e8e\u5185\u5b58\u7b49\u5e95\u5c42\u7cfb\u7edf\u8d44\u6e90\u7684\u63a7\u5236\uff0c\u800c\u4f7f\u7528Java\/Python\u8fd9\u7c7b\u7684\u8bed\u8a00\u3002\u800c\u4f5c\u4e3a\u4e00\u4e2a\u5f00\u6e90\u9879\u76ee\uff0c\u671f\u671b\u6240\u6709\u7684\u8d21\u732e\u8005\u90fd\u662fC++\u7684\u9ad8\u624b\uff0c\u672a\u514d\u6709\u4e9b\u5f3a\u4eba\u6240\u96be\uff0c\u8fd9\u4f3c\u4e4e\u6210\u4e86\u4e00\u4e2a\u6b7b\u7ed3\u3002\u5176\u4ed6\u7c7b\u4f3c\u7684\u5f00\u6e90\u9879\u76ee\u600e\u4e48\u529e\u5462\uff1f\u8c8c\u4f3c\u4ed6\u4eec\u90fd\u7528\u7684\u7eafc\u2026\u2026<\/p>\n\n\n\n

      \u53e6\u4e00\u65b9\u9762\uff0cCeph\u5e7f\u6cdb\u4f7f\u7528\u4e86STL\uff0c\u5728\u90e8\u5206\u6838\u5fc3\u4ee3\u7801\u4e2d\u8fd8\u662f\u7528\u4e86BOOST<\/strong>\uff0c\u8fd9\u4e24\u8005\u5728\u5e95\u5c42\u6838\u5fc3\u7cfb\u7edf\u4ee3\u7801\u4e2d\u7684\u53ef\u7528\u6027\u4e5f\u4e00\u76f4\u5b58\u5728\u4e89\u8bae\u3002<\/strong>\u8fd9\u66f4\u52a0\u52a0\u5267\u4e86\u4ee3\u7801\u8d28\u91cf\u7684\u6311\u6218\u6027\u3002<\/p>\n\n\n\n

      \u6700\u5173\u952e\u7684\u662f\uff0cCeph\u4f3c\u4e4e\u5df2\u7ecf\u88ab\u592a\u591a\u5df2\u7ecf\u80cc\u8d1f\u4e86\u592a\u591a\u7684\u5386\u53f2\u5305\u88b1<\/strong>\uff0c\u6bd4\u5982\u6700\u6838\u5fc3\u7684osd\u6a21\u5757\uff0c\u6700\u521d\u7684\u8bbe\u8ba1\u5305\u542bOSD\u548cPG\u7c7b\uff0c\u5176\u4e2dPG\u7c7b\u8d1f\u8d23PG\u7684\u901a\u7528\u903b\u8f91\uff0cOSD\u8d1f\u8d23\u7ba1\u7406\u6240\u6709\u7684PG\u3002\u7136\u540ePG\u7684\u5b50\u7c7bReplicatedPG\u5b9e\u73b0\u4e86\u4ee5\u526f\u672c\u4f5c\u4e3a\u5197\u4f59\u6a21\u5f0f\u7684PG\u3002\u8fd9\u91cc\u5c31\u5b58\u5728\u4e86\u4e24\u4e2a\u534a\u7c7b\uff1aOSD\u3001PG\u53ca\u5176\u5b50\u7c7bReplicatedPG\uff0c\u8fd9\u4e24\u4e2a\u534a\u7c7b\u5b9e\u73b0\u4e86osd\u6a21\u575799%\u7684\u903b\u8f91\uff0c\u53ef\u4ee5\u60f3\u8c61\u8fd9\u4e24\u4e2a\u534a\u7c7b\u4f1a\u6709\u591a\u5927\u3002<\/p>\n\n\n\n

      \u5728\u76ee\u524d\u7684master\u5206\u652f\u4e0a\uff0c\u76f8\u5173\u6587\u4ef6\u7684\u5927\u5c0f\u5206\u522b\u662f\uff1a<\/p>\n\n\n\n

      OSD.h+OSD.cc = 2383\u884c+8604\u884c = 10987\u884c<\/p>\n\n\n\n

      PG.h+PG.cc = 2256\u884c+7611\u884c = 9867\u884c<\/p>\n\n\n\n

      ReplicatedPG.h+ReplicatedPG.cc = 1487\u884c+12665\u884c = 14152\u884c<\/p>\n\n\n\n

      \u9700\u8981\u7279\u522b\u6ce8\u610f\u7684\u662f\uff0c\u4eceC++\u7ee7\u627f\u7684\u89d2\u5ea6\u4e0a\uff0c\u7406\u89e3\u4e00\u4e2a\u7c7b\uff0c\u5fc5\u987b\u7406\u89e3\u4ed6\u7684\u7236\u7c7b<\/strong>\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u5982\u679c\u4f60\u60f3\u7406\u89e3ReplicatedPG\uff0c\u7406\u8bba\u4e0a\u4f60\u5fc5\u987b\u540c\u65f6\u7406\u89e3PG\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0c\u8981\u540c\u65f6\u7406\u89e320000+\u884c\u4ee3\u7801\uff01<\/p>\n\n\n\n

      \u66f4\u52a0\u4e27\u5fc3\u75c5\u72c2\u7684\u662f\uff0c\u8fd9\u4e24\u4e2a\u534a\u7c7b\u4e4b\u95f4\u5b58\u5728\u5bc6\u5207\u800c\u590d\u6742\u7684\u8c03\u7528\u5173\u7cfb\uff0c\u76f8\u4e92\u4e4b\u95f4\u76f4\u63a5\u4f7f\u7528\u6574\u4e2a\u7c7b\uff0c\u800c\u6ca1\u6709\u4ec0\u4e48\u5b9e\u9645\u4e0a\u7684\u63a5\u53e3\u9694\u79bb\u3002<\/strong>\u4e25\u91cd\u52a0\u5267\u4e86\u7406\u89e3\u4ee3\u7801\u7684\u96be\u5ea6\u3002<\/p>\n\n\n\n

      \u5728EC\u529f\u80fd\u4ee5\u4e00\u79cd\u5947\u8469\u7684\u65b9\u5f0f\u52a0\u5165\u5230osd\u4e2d\u4e4b\u540e\uff0c\u6574\u4e2a\u573a\u9762\u66f4\u52a0\u6df7\u4e71\u3002\u6309\u7167\u6700\u521d\u7684\u8bbe\u8ba1\uff0c\u5b9e\u73b0EC\u5e94\u8be5\u589e\u52a0PG\u7684\u4e00\u4e2a\u5b50\u7c7b\uff0c\u7c7b\u4f3cErasureCodePG\u3002\u4f46\u662f\u7531\u4e8eReplicatedPG\u5305\u542b\u4e86\u592a\u591a\u901a\u7528\u7684\u4ee3\u7801\uff0c\u5b9e\u9645\u4e0a\u5df2\u7ecf\u548cPG\u5408\u4e8c\u4e3a\u4e00\u4e86\uff0c\u6240\u4ee5EC\u53ea\u80fd\u5728ReplicatedPG\u7684\u57fa\u7840\u4e0a\u6539\u9020\u3002\u4e8e\u662f\u53c8\u51fa\u73b0\u4e86PGBackend\u7684\u6982\u5ff5\u548c\u76f8\u5173\u7684\u5b9e\u73b0\uff0c\u8fd9\u53ea\u80fd\u8bf4\u662f\u6311\u6218\u4eba\u8111\u7684\u6781\u9650\u4e86\u3002<\/p>\n\n\n\n

      Ceph\u793e\u533a\u4e5f\u66fe\u8bd5\u7740\u68b3\u7406\u4ee3\u7801\uff0c\u6bd4\u5982\u6dfb\u52a0OSDService\u7c7b\uff0c\u4f5c\u4e3aPG\u4e0eOSD\u901a\u8baf\u7684\u63a5\u53e3\u3002\u8fd9\u6837\u6240\u6709\u7684PG\u5168\u90e8\u8c03\u7528OSDService\u800c\u975eOSD\uff0c\u76f8\u5f53\u4e8e\u505a\u4e86OSD\u4e0ePG\u4e4b\u95f4\u7684\u9694\u79bb\u3002\u4f46\u662f\u4f3c\u4e4e\u5e76\u6ca1\u6709\u8d77\u5230\u8db3\u591f\u7684\u6548\u679c\uff0c\u73b0\u5728\u5df2\u7ecf\u540d\u5b58\u5b9e\u4ea1\u4e86\u3002<\/p>\n\n\n\n

      Ceph\u5728\u8fd9\u6837\u7684\u4ee3\u7801\u8d28\u91cf\u4e0b\uff0c\u8fd8\u80fd\u5411\u524d\u8d70\u591a\u4e45\uff0c\u59d4\u5b9e\u662f\u4e00\u4ef6\u4ee4\u4eba\u62c5\u5fe7\u7684\u4e8b\u60c5\u3002<\/p>\n\n\n\n

      2. \u6027\u80fd<\/strong><\/p>\n\n\n\n

      Ceph\u7684\u6027\u80fd\u603b\u7684\u6765\u8bf4\u8fd8\u662f\u4e0d\u9519\u7684\uff0c\u57fa\u672c\u4e0a\u80fd\u53d1\u6325\u51fa\u7269\u7406\u786c\u4ef6\u7684\u6027\u80fd\uff0c\u4f46\u662f\u5b58\u5728\u4ee5\u4e0b\u51e0\u4e2a\u9690\u60a3\uff1a<\/p>\n\n\n\n

      1\uff09\u6570\u636e\u53cc\u500d\u5199\u5165\u3002<\/strong>Ceph\u672c\u5730\u5b58\u50a8\u63a5\u53e3\uff08FileStore\uff09\u4e3a\u4e86\u652f\u6301\u4e8b\u52a1\uff0c\u5f15\u5165\u4e86\u65e5\u5fd7\uff08Journal\uff09\u673a\u5236\u3002\u6240\u6709\u7684\u5199\u5165\u64cd\u4f5c\u90fd\u9700\u8981\u5148\u5199\u5165\u65e5\u5fd7\uff08XFS\u6a21\u5f0f\u4e0b\uff09\uff0c\u7136\u540e\u518d\u5199\u5165\u672c\u5730\u6587\u4ef6\u7cfb\u7edf\u3002\u7b80\u5355\u6765\u8bf4\u5c31\u662f\u4e00\u4efd\u6570\u636e\u9700\u8981\u5199\u4e24\u904d\uff0c\u65e5\u5fd7+\u672c\u5730\u6587\u4ef6\u7cfb\u7edf\u3002<\/strong>\u8fd9\u5c31\u9020\u6210\u4e86\u5728\u5927\u89c4\u6a21\u8fde\u7eedIO\u7684\u60c5\u51b5\u4e0b\uff0c\u5b9e\u9645\u4e0a\u78c1\u76d8\u8f93\u51fa\u7684\u541e\u5410\u91cf\u53ea\u6709\u5176\u7269\u7406\u6027\u80fd\u7684\u4e00\u534a\u3002<\/p>\n\n\n\n

      2\uff09IO\u8def\u5f84\u8fc7\u957f\u3002<\/strong>\u8fd9\u4e2a\u95ee\u9898\u5728Ceph\u7684\u5ba2\u6237\u7aef\u548c\u670d\u52a1\u5668\u7aef\u90fd\u5b58\u5728\u3002\u4ee5osd\u4e3a\u4f8b\uff0c\u4e00\u4e2aIO\u9700\u8981\u7ecf\u8fc7message\u3001OSD\u3001FileJournal\u3001FileStore\u591a\u4e2a\u6a21\u5757\u624d\u80fd\u5b8c\u6210\uff0c\u6bcf\u4e2a\u6a21\u5757\u4e4b\u95f4\u90fd\u6d89\u53ca\u5230\u961f\u5217\u548c\u7ebf\u7a0b\u5207\u6362\uff0c\u90e8\u5206\u6a21\u5757\u5728\u5bf9IO\u8fdb\u884c\u5904\u7406\u65f6\u8fd8\u8981\u8fdb\u884c\u5185\u5b58\u62f7\u8d1d\uff0c\u5bfc\u81f4\u6574\u4f53\u6027\u80fd\u4e0d\u9ad8\u3002<\/p>\n\n\n\n

      3\uff09\u5bf9\u9ad8\u6027\u80fd\u786c\u4ef6\u7684\u652f\u6301\u6709\u5f85\u6539\u8fdb\u3002<\/strong>Ceph\u6700\u5f00\u59cb\u662f\u4e3aHDD\u8bbe\u8ba1\u7684\uff0c\u6ca1\u6709\u5145\u5206\u8003\u8651\u5168SSD\uff0c\u751a\u81f3\u66f4\u5148\u8fdb\u7684PCIe SSD\u548cNVRAM\u7684\u60c5\u51b5NVRAM\u3002<\/strong>\u5bfc\u81f4\u8fd9\u4e9b\u786c\u4ef6\u7684\u7269\u7406\u6027\u80fd\u5728Ceph\u4e2d\u65e0\u6cd5\u5145\u5206\u53d1\u6325\u51fa\u6765\uff0c\u7279\u522b\u662f\u5ef6\u8fdf\u548cIOPS\uff0c\u53d7\u6bd4\u8f83\u5927\u7684\u5f71\u54cd\u3002<\/p>\n\n\n\n

      3. CephFS<\/strong><\/p>\n\n\n\n

      CephFS\u73b0\u5728\u5728\u6574\u4e2aCeph\u7cfb\u7edf\u4e2d\u5904\u4e8e\u4e00\u4e2a\u8f83\u4e3a\u5c34\u5c2c\u7684\u60c5\u51b5\uff0c\u56e0\u4e3aPOSIX\u8fd9\u79cd\u501f\u53e3\u4f3c\u4e4e\u5728\u4e91\u8ba1\u7b97\u4e2d\u6ca1\u6709\u7528\u6b66\u4e4b\u5730\uff0c\u5bfc\u81f4\u4e86\u793e\u533a\u5bf9\u8fd9\u4e2a\u6a21\u5757\u7684\u5173\u6ce8\u4e0d\u8db3\uff0c\u4e5f\u5c31\u6ca1\u6709\u4ec0\u4e48\u8fdb\u5c55\u3002<\/p>\n\n\n\n

      CephFS\u4f5c\u4e3a\u6700\u521dCeph\u7684\u8bbe\u8ba1\u76ee\u6807\uff0cSage\u6295\u5165\u4e86\u5de8\u5927\u7684\u7cbe\u529b\uff0c\u51e0\u4e4e\u5b9e\u73b0\u4e86\u6240\u6709\u9700\u8981\u7684\u7279\u6027\uff0c\u5e76\u4e14\u8fdb\u884c\u4e86\u5927\u91cf\u5de5\u7a0b\u5c42\u9762\u7684\u4f18\u5316\u3002<\/p>\n\n\n\n

      \u6b63\u6240\u8c13\u6210\u4e5f\u8427\u4f55\u8d25\u8427\u4f55\uff0cCeph\u60f3\u628aCephFS\u6a21\u5757\u505a\u5230\u8db3\u591f\u5f3a\u5927\uff0c\u751a\u81f3\u662f\u6700\u5f3a\u5927\uff0c\u4f46\u5f3a\u5927\u7684\u540c\u65f6\u4e5f\u610f\u5473\u7740\u4e0d\u83f2\u7684\u4ee3\u4ef7\u3002<\/strong>\u5143\u6570\u636e\u52a8\u6001\u5b50\u6811\u5206\u533a\u3001\u76ee\u5f55\u5206\u7247\u3001\u5feb\u7167\u3001\u6743\u9650\u63a7\u5236\u3001IOPS\u4f18\u5316\u3001\u6545\u969c\u6062\u590d\u3001\u5206\u5e03\u5f0f\u7f13\u5b58\u3001\u5f3a\u5f31\u4e00\u81f4\u6027\u63a7\u5236\uff0c\u8fd9\u4e9b\u9ad8\u5927\u4e0a\u7684\u540d\u8bcd\u80cc\u540e\u90fd\u610f\u5473\u7740\u590d\u6742\u7684\u5de5\u7a0b\u6027\u4efb\u52a1\uff0c\u66f4\u4e0d\u8981\u8bf4\u5c06\u8fd9\u4e9b\u53e0\u52a0\u5728\u4e00\u8d77\u3002\u5f88\u591a\u65f6\u5019\uff0c\u53e0\u52a0\u4e0d\u662f\u60f3\u52a0\uff0c\u800c\u662f\u76f8\u4e58\u7684\u5173\u7cfb\u3002\u6700\u7ec8\u7684\u7ed3\u679c\u5c31\u662f\u6574\u4e2aMDS\u7684\u5de5\u7a0b\u96be\u5ea6\u5df2\u7ecf\u8d85\u8fc7\u4e86\u53ef\u4ee5\u638c\u63a7\u7684\u7a0b\u5ea6\uff0c\u65e0\u6cd5\u505a\u51fa\u8db3\u591f\u6210\u719f\u3001\u7a33\u5b9a\u7684\u7cfb\u7edf\u3002<\/strong><\/p>\n\n\n\n

      \u76ee\u524dCephFS\u5ba3\u79f0\u5176\u5355MDS\u7684\u6a21\u5f0f\u662f\u7a33\u5b9a\u7684\uff0cMDS\u7684\u96c6\u7fa4\u7684\u6a21\u5f0f\u662f\u4e0d\u7a33\u5b9a\u7684\u3002\u800c\u5feb\u7167\u529f\u80fd\u9ed8\u8ba4\u5173\u95ed\uff0c\u4eca\u540e\u4e5f\u591f\u545b\u4f1a\u6709\u5f00\u542f\u7684\u53ef\u80fd\u4e86\u3002<\/p>\n\n\n\n

      4. \u4e1a\u52a1\u8fde\u7eed\u6027<\/strong><\/p>\n\n\n\n

      Ceph\u4e2d\u7684RADOS\u91c7\u7528\u5f3a\u4e00\u81f4\u6027\u8bbe\u8ba1\uff0c\u5373Write-All-Read-One\uff0c\u8fd9\u79cd\u6a21\u5f0f\u7684\u597d\u5904\u5728\u4e8e\u8bfb\u53d6\u6548\u7387\u8f83\u9ad8\uff0c\u800c\u4e14\u5de5\u7a0b\u96be\u5ea6\u8f83\u4f4e\uff0c\u6bd4\u8f83\u9002\u5408\u4e0e\u8bfb\u591a\u5199\u5c11\u7684\u7cfb\u7edf\u3002<\/strong><\/p>\n\n\n\n

      Write-All-Read-One\u7684\u7279\u70b9\u662f\u5fc5\u987b\u7b49\u5f85\u6240\u6709\u7684\u526f\u672c\u5168\u90e8\u5199\u5165\u5b8c\u6bd5\u624d\u7b97\u662f\u5199\u5165\u6210\u529f\uff0c\u8fd9\u5b9e\u9645\u4e0a\u5bf9\u7cfb\u7edf\u786c\u4ef6\u7684\u53ef\u9760\u6027\u8981\u6c42\u8f83\u9ad8\uff0c\u56e0\u4e3a\u5982\u679c\u5728\u5199\u5165\u8fc7\u7a0b\u4e2d\u5b58\u5728\u4efb\u610f\u786c\u4ef6\u6545\u969c\uff0c\u5219\u5199\u5165\u8fc7\u7a0b\u90fd\u8981\u53d7\u5f71\u54cd\u3002\u901a\u5e38\u8868\u73b0\u4e3a\u5361\u987f\uff0c\u4e00\u822c\u5728\u6570\u79d2\u7ea7\u522b\uff0c\u65f6\u95f4\u957f\u77ed\u548c\u5224\u65ad\u6545\u969c\u7684\u673a\u5236\u4ee5\u53ca\u6545\u969c\u6062\u590d\u8fc7\u7a0b\u4e2dIO\u7684\u5904\u7406\u7b56\u7565\u76f8\u5173\u3002<\/p>\n\n\n\n

      \u4f46\u662f\u5f53\u96c6\u7fa4\u975e\u5e38\u975e\u5e38\u5927\u65f6\uff0cWrite-All-Read-One\u5bf9\u4e8e\u786c\u4ef6\u53ef\u9760\u6027\u7684\u8981\u6c42\u51e0\u4e4e\u662f\u65e0\u6cd5\u6ee1\u8db3\u7684\u3002<\/strong>\u60f3\u8c61\u4e00\u4e0b\u4e00\u4e2a10PB\u7684\u7cfb\u7edf\uff0c\u6309\u7167\u6700\u59274TB\u6bcf\u5757\u76d8\u7684\u8ba1\u7b97\uff0c\u5c31\u67092500\u5757\u78c1\u76d8\u3002\u6309\u7167\u6211\u4eec\u4ee5\u5f80\u7684\u8fd0\u7ef4\u7ecf\u9a8c\uff0c\u6bcf\u5468\u5b58\u5728\u4e00\u5757\u78c1\u76d8\u6545\u969c\u662f\u5b8c\u5168\u6b63\u5e38\u7684\u3002\u8fd9\u79cd\u573a\u666f\u4e0b\uff0c\u5982\u679c\u6570\u636e\u5206\u5e03\u8db3\u591f\u5206\u6563\uff0c\u5b9e\u9645\u4e0a\u4e00\u5757\u78c1\u76d8\u53ef\u80fd\u6d89\u53ca\u5230\u5f88\u591a\u6570\u636e\u5757\uff0c\u4e5f\u5c31\u662f\u8bf4\u4e00\u5757\u78c1\u76d8\u6545\u969c\u4f1a\u5f71\u54cd\u5f88\u591aIO\uff0c\u800c\u8fd9\u79cd\u60c5\u51b5\u6bcf\u5468\u53d1\u751f\u4e00\u6b21\u3002\u8fd9\u5bf9\u4e1a\u52a1\u8fde\u7eed\u6027\u7684\u5f71\u54cd\u662f\u5df2\u7ecf\u662f\u4e0d\u53ef\u5ffd\u7565\u7684\u3002<\/p>\n\n\n\n

      \u751f\u4ea7\u73af\u5883\u4e2d\u7684\u573a\u666f\u6bd4\u8fd9\u4e2a\u66f4\u52a0\u590d\u6742\uff0c\u56e0\u4e3a\u78c1\u76d8\u6216\u8005\u786c\u4ef6\u7684\u6545\u969c\u53ef\u80fd\u4e0d\u4ec5\u8868\u73b0\u4e3a\u4e0d\u53ef\u5199\uff0c\u8fd8\u6709\u53ef\u80fd\u662f\u6162\u6216\u8005\u4e0d\u7a33\u5b9a\u3002\u8fd9\u4e9b\u60c5\u51b5\u5bf9\u4e8e\u4e1a\u52a1\u8fde\u7eed\u6027\u7684\u5f71\u54cd\u4e5f\u66f4\u52a0\u4e25\u91cd\u3002<\/p>\n\n\n\n

      5. \u793e\u533a<\/strong><\/p>\n\n\n\n

      Ceph\u793e\u533a\u73b0\u5728\u5df2\u7ecf\u6709\u5f88\u591a\u5382\u5546\u5b9e\u9645\u4e0a\u6216\u8005\u53f7\u79f0\u53c2\u5165\u8fdb\u6765\uff0c\u5176\u4e2d\u4e0d\u4e4fIntel\u3001Dreamhost\u3001SanDisk\u8fd9\u6837\u7684\u5927\u5382\uff0c\u4e5f\u4e0d\u4e4fUnitedStack\u8fd9\u6837\u7684Start-Up\u516c\u53f8\uff0c\u8fd8\u6709\u7535\u4fe1\u3001\u5927\u5b66\u3001\u7814\u7a76\u6240\u8fd9\u7c7b\u975e\u5b58\u50a8\u9886\u57df\u7684\u516c\u53f8\u6216\u5355\u4f4d\u3002\u4f46\u5b9e\u9645\u4e0a\u6574\u4e2aCeph\u8fd8\u662f\u638c\u63e1\u5728Inktank\u6216\u8005\u8bf4RedHat\u7684\u624b\u4e2d\uff0c\u7edd\u5927\u591a\u6570\u6838\u5fc3\u4ee3\u7801\u7531\u4ed6\u4eec\u8d21\u732e\uff0c\u4e5f\u662f\u4ed6\u4eecReview\u548cMerge\u3002\u603b\u7684\u6765\u8bf4\u8fd8\u662f\u4e00\u4e2a\u96c6\u6743\u7ec4\u7ec7\u3002<\/strong><\/p>\n\n\n\n

      \u66f4\u52a0\u91cd\u8981\u7684\u662f\uff0cCeph\u76f8\u6bd4OpenStack\u8fd9\u79cd\u6210\u719f\u5b8c\u5584\u7684\u5f00\u6e90\u793e\u533a\uff0c\u7f3a\u4e4f\u8db3\u591f\u7684\u57fa\u7840\u8bbe\u65bd<\/strong>\uff0c\u4f8b\u5982\u6210\u719f\u7684\u5355\u5143\u6d4b\u8bd5\u3001\u96c6\u6210\u6d4b\u8bd5\u3001\u6d4b\u8bd5\u73af\u5883\u3001Reivew\u6d41\u7a0b\u3001\u8d21\u732e\u6307\u5f15\u3001\u4ee3\u7801\u89c4\u8303\u7b49\u3002\u5bfc\u81f4\u6574\u4e2a\u793e\u533a\u4ecd\u7136\u662f\u4eba\u6cbb\u3001\u800c\u975e\u6cd5\u5236\u7684\u8fc7\u7a0b\uff0c\u4ee3\u7801\u548c\u7cfb\u7edf\u7684\u53d1\u5c55\u65b9\u5411\u672c\u8d28\u662f\u7531RedHat\u516c\u53f8\u63a7\u5236\u7684\u3002<\/strong><\/p>\n\n\n\n

      \u5bf9\u4e8e\u4ee5\u4e0a\u8fd9\u4e9b\u95ee\u9898\uff0cCeph\u793e\u533a\u4e5f\u975e\u5e38\u6e05\u695a\uff0c\u5e76\u4e14\u6b63\u5728\u6216\u8005\u5c06\u8981\u6539\u8fdb\u3002\u4f8b\u5982\u4e3a\u4e86\u589e\u52a0\u4e86\u5bf9\u4e8eSSD\u7684\u652f\u6301\uff0c\u6539\u8fdb\u6570\u636e\u53cc\u500d\u5199\u5165\u95ee\u9898\u4ee5\u53ca\u66f4\u5b8c\u5584\u7684\u793e\u533a\u5efa\u8bbe\u548c\u57fa\u7840\u8bbe\u65bd\u7b49\u3002\u8fd9\u4e9b\u90fd\u589e\u52a0\u4e86\u4eba\u4eec\u5bf9Ceph\u7684\u4fe1\u5fc3\u3002<\/p>\n\n\n\n

      \u603b\u7684\u6765\u8bf4\uff0cCeph\u7455\u4e0d\u63a9\u745c\uff0c\u4ecd\u7136\u662f\u4e00\u4e2a\u4f18\u79c0\uff0c\u751a\u81f3\u51fa\u8272\u7684\u5f00\u6e90\u5b58\u50a8\u7cfb\u7edf\u3002\u5982\u679c\u8bf4\u5206\u5e03\u5f0f\u5b58\u50a8\u5728\u4e91\u8ba1\u7b97\u65f6\u4ee3\u662f\u98ce\u53e3\u4e0a\u7684\u732a\uff0c\u90a3\u4e48Ceph\u4e5f\u662f\u4e00\u76f4\u4f18\u79c0\u7684\u732a\u3002<\/strong><\/p>\n\n\n\n

      \u672a\u6765\u662f\u4ec0\u4e48\u6837\u5b50\uff0c\u6211\u4eec\u62ed\u76ee\u4ee5\u5f85\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

      \u8f6c\u81ea\uff1ahttps:\/\/www.ustack.com\/blog\/sikao\/ Ce …<\/p>\n

      \u7ee7\u7eed\u9605\u8bfb »<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2316","post","type-post","status-publish","format-standard","hentry","category-moo"],"_links":{"self":[{"href":"https:\/\/tixbay.net\/index.php?rest_route=\/wp\/v2\/posts\/2316","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tixbay.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tixbay.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tixbay.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tixbay.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2316"}],"version-history":[{"count":1,"href":"https:\/\/tixbay.net\/index.php?rest_route=\/wp\/v2\/posts\/2316\/revisions"}],"predecessor-version":[{"id":2317,"href":"https:\/\/tixbay.net\/index.php?rest_route=\/wp\/v2\/posts\/2316\/revisions\/2317"}],"wp:attachment":[{"href":"https:\/\/tixbay.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2316"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tixbay.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2316"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tixbay.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2316"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}