{"id":678,"date":"2011-03-29T15:02:12","date_gmt":"2011-03-29T07:02:12","guid":{"rendered":"http:\/\/www.strongd.net\/?p=678"},"modified":"2011-03-29T15:02:12","modified_gmt":"2011-03-29T07:02:12","slug":"mongodb-1-8%e9%80%9a%e8%bf%87journaling%e6%97%a5%e5%bf%97%e6%94%b9%e5%96%84%e5%8f%af%e9%9d%a0%e6%80%a7%e2%80%8b","status":"publish","type":"post","link":"https:\/\/www.strongd.net\/?p=678","title":{"rendered":"MongoDB 1.8\u901a\u8fc7Journaling\u65e5\u5fd7\u6539\u5584\u53ef\u9760\u6027\u200b"},"content":{"rendered":"<p>\u9762\u5411\u6587\u6863\u7684\u6570\u636e\u5e93\u5f15\u64ceMongoDB<a href=\"http:\/\/blog.mongodb.org\/post\/3903149313\/mongodb-1-8-released\">\u57283\u670816\u65e5\u53d1\u5e03\u4e861.8\u7248\u672c<\/a>\u3002\u5173\u952e\u7684\u53d8\u66f4\u5305\u62ec\u65b0\u589eJournaling\u65e5\u5fd7\u3001\u63d0\u5347\u5206\u7247\u6027\u80fd\u4ee5\u53caShell\u7684Tab\u200b\u8865\u5168\u3002\u200b<\/p>\n<p>Journaling\u65e5\u5fd7\u901a\u8fc7\u9884\u5199\u5f0f\u7684Redo\u65e5\u5fd7\u4e3aMongoDB\u589e\u52a0\u4e86\u989d\u5916\u7684\u53ef\u9760\u6027\u3002\u5f00\u542f\u8be5\u529f\u80fd\u65f6\uff0c\u53d8\u66f4\u4f1a\u5148\u5199\u5165Journaling\u65e5\u5fd7\uff0c\u200b \u5b9a\u671f\u96c6\u4e2d\u63d0\u4ea4\uff08\u76ee\u524d\u662f\u6bcf100ms\u63d0\u4ea4\u4e00\u6b21\uff09\u200b\uff0c\u7136\u540e\u5728\u771f\u5b9e\u6570\u636e\u4e0a\u8fdb\u884c\u8fd9\u4e9b\u53d8\u66f4\u3002\u5982\u679c\u670d\u52a1\u5668\u5b89\u5168\u5173\u95ed\uff0c\u65e5\u5fd7\u4f1a\u88ab\u6e05\u9664\u3002\u5728\u670d\u52a1\u5668\u542f\u52a8\u65f6\uff0c\u5982\u679c\u5b58\u5728 Journaling\u65e5\u5fd7\u200b\uff0c\u5219\u4f1a\u8fdb\u884c\u56de\u653e\u3002\u8fd9\u4fdd\u8bc1\u4e86\u90a3\u4e9b\u5df2\u5199\u5165\uff0c\u4f46\u5728\u670d\u52a1\u5668\u5d29\u6e83\u524d\u8fd8\u6ca1\u6709\u56de\u653e\u7684\u200b\u65e5\u5fd7\u80fd\u5728\u7528\u6237\u8fde\u63a5\u524d\u200b\u88ab\u6267\u884c\u3002\u200b\u4e24\u6b21\u63d0\u4ea4\u4e4b\u95f4\u90a3 100ms\u7684\u65f6\u95f4\u7a97\u53e3\u200b\u5728\u672a\u6765\u7684\u7248\u672c\u4e2d\u6709\u671b\u88ab\u7f29\u5c0f\u3002<\/p>\n<p>MongoDB\u662f\u200b\u4e00\u79cd <a href=\"http:\/\/en.wikipedia.org\/wiki\/NoSQL\">NoSQL<\/a>\u6570\u636e\u5e93\u200b\uff0c\u4e0d\u540c\u4e8eSQL 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Server\u91cc\u7684\u8868\uff09\u4e2d\u200b\u3002Schema\u7684\u8bbe\u8ba1\u53d6\u51b3\u4e8e\u54ea\u4e9b\u6587\u6863\u5e94\u8be5\u6709\u81ea\u5df1\u7684\u96c6\u5408\u200b\uff0c\u54ea\u4e9b\u5e94\u8be5\u88ab\u5d4c\u5165\u5230\u5176\u4ed6\u96c6\u5408\u4e2d\u53bb\u3002\u5d4c\u5165\u7684\u6587\u6863\u5c31\u50cf\u7c7b\u91cc\u7684\u6210\u5458\u5bf9\u8c61\u3002\u5728\u5173\u7cfb \u578b\u7cfb\u7edf\u4e2d\uff0c\u4f60\u4f1a\u7528\u4e00\u5f20\u8868\u6765\u5b58\u50a8\u8ba2\u5355\uff0c\u53e6\u4e00\u5f20\u5916\u952e\u7684\u8868\u6765\u5b58\u50a8\u8ba2\u5355\u9879\u3002\u5728MongoDB\u4e2d\uff0c\u200b\u9488\u5bf9\u540c\u6837\u7684\u573a\u666f\uff0c\u63a8\u8350\u7684\u505a\u6cd5\u662f\u7528\u4e00\u4e2a\u96c6\u5408\u6765\u4fdd\u5b58\u8ba2\u5355\uff0c\u6bcf\u4e2a\u8ba2\u5355\u4e2d \u4fdd\u5b58\u4e00\u4e2a\u8ba2\u5355\u9879\u7684\u6570\u7ec4\uff0c\u5d4c\u5165\u5176\u4e2d\u3002\u200b<\/p>\n<p>\u6c34\u5e73\u6269\u5c55\u662f\u901a\u8fc7\u200b<a href=\"http:\/\/www.mongodb.org\/display\/DOCS\/Sharding\">\u81ea\u52a8\u5206\u7247<\/a>\u6765 \u200b\u505a\u7684\u200b\uff0c\u200b\u5b83\u5141\u8bb8\u6709\u5e8f\u7684\u96c6\u5408\u6570\u636e\u5206\u5e03\u3002\u6bcf\u4e2a\u5206\u7247\u90fd\u662f\u4e00\u7ec4\u914d\u7f6e\u6210Replica\u96c6\u7684\u673a\u5668\u200b\uff0c\u8fd9\u610f\u5473\u7740\u5206\u7247\u91cc\u7684\u6bcf\u53f0\u673a\u5668\u200b\u90fd\u62e5\u6709\u5206\u7247\u6570\u636e\u7684\u5b8c\u6574\u62f7\u8d1d\u3002\u200b\u5206\u7247 \u4e2d\u4f1a\u81ea\u52a8\u8fdb\u884c\u6545\u969c\u8f6c\u79fb\u3002MongoDB\u4f1a\u81ea\u52a8\u5c06\u67e5\u8be2\u5f15\u5bfc\u5230\u5408\u9002\u7684\u5206\u7247\u4e0a\uff0c\u56e0\u6b64\u5e94\u7528\u7a0b\u5e8f\u5e76\u4e0d\u9700\u8981\u4e86\u89e3\u54ea\u4e2a\u5206\u7247\u6301\u6709\u4ec0\u4e48\u6570\u636e\u5143\u7d20\u3002\u200b\u65b0\u7684Replica\u96c6\u8eab\u4efd \u8ba4\u8bc1\u529f\u80fd\u5141\u8bb8Replica\u96c6\u7684\u6210\u5458\u4e4b\u95f4\u8fdb\u884c\u81ea\u52a8\u8eab\u4efd\u8ba4\u8bc1\uff0c\u5176\u4e2d\u4f7f\u7528\u4e86\u5bc6\u94a5\u6587\u4ef6\u548c <em>\u2013keyfile<\/em> \u9009\u9879\u3002\u200b<\/p>\n<p>Covered\u7d22\u5f15\u548cSparse\u7d22\u5f15\u4e5f\u662f\u8be5\u7248\u672c\u4e2d\u65b0\u589e\u52a0\u7684\u7279\u6027\u3002<a href=\"http:\/\/www.mongodb.org\/display\/DOCS\/Retrieving+a+Subset+of+Fields#RetrievingaSubsetofFields-CoveredIndexes\">\u200bCovered\u7d22\u5f15<\/a>\u5141\u8bb8\u200b\u5728\u7d22\u5f15\u672c\u8eab\u91cc\u5b58\u50a8\u6570\u636e\uff0c\u800c<a href=\"http:\/\/www.mongodb.org\/display\/DOCS\/Indexes#Indexes-SparseIndexes\">\u200bSparse\u7d22\u5f15<\/a>\u5219\u4f1a\u6392\u9664\u6389\u4e0d\u5305\u542b\u7d22\u5f15\u5b57\u6bb5\u7684\u6587\u6863\u3002Covered\u7d22\u5f15\u5728\u67e5\u8be2\u6240\u8bf7\u6c42\u7684\u5168\u90e8\u5b57\u6bb5\u200b\u90fd\u5305\u542b\u5728Covered\u7d22\u5f15\u4e2d\u65f6\u80fd\u63d0\u5347\u6027\u80fd\uff0c\u56e0\u4e3a\u4e0d\u518d\u9700\u8981\u53d6\u51fa\u5b8c\u6574\u7684\u6587\u6863\u8bb0\u5f55\u3002Sparse\u7d22\u5f15\u5728\u6240\u68c0\u7d22\u7684\u5b57\u6bb5\u5e76\u975e\u7ecf\u5e38\u51fa\u73b0\u5728\u96c6\u5408\u4e2d\u65f6\u80fd\u63d0\u5347\u6027\u80fd\u3002\u76ee\u524d\uff0cSparse\u7d22\u5f15\u53ea\u80fd\u6709\u4e00\u4e2a\u5b57\u6bb5\u3002\u200b<\/p>\n<p>\u5728MongoDB\u7684\u5de5\u5177\u96c6\u4e2d\u4e5f\u6709\u4e00\u4e9b\u53d8\u5316\u3002mongostat \u589e\u52a0\u4e86\u200bdiscover\u6a21\u5f0f\uff08<em>&#8211;discover<\/em>\uff09\u200b\uff0c\u5b83\u4f1a\u81ea\u52a8\u4ece\u96c6\u7fa4\u7684\u8282\u70b9\u4e2d\u53d6\u56de\u7edf\u8ba1\u4fe1\u606f\u3002\u200b\u901a\u8fc7<em>mongodump \u2013oplog<\/em> \u548c<em>mongorestore \u2013oplogReplay<\/em>\u63d0\u4f9b\u4e86\u9ad8\u7ea7\u4e8b\u52a1\u65e5\u5fd7\u8f6c\u50a8\u548c\u6062\u590d\u200b\u529f\u80fd\u3002\u200b<\/p>\n<p>\u6b32\u66f4\u591a\u5730\u4e86\u89e3\u8be5\u7248\u672c\u4e2d\u7684\u65b0\u7279\u6027\uff0c\u8bf7\u67e5\u770b<a href=\"http:\/\/www.10gen.com\/webinars\/v18\">MongoDB 1.8 Webinar<\/a>\u3002<\/p>\n<p><strong>\u67e5\u770b\u82f1\u6587\u539f\u6587\uff1a<\/strong><a href=\"http:\/\/www.infoq.com\/news\/2011\/03\/MongoDB-1.8;jsessionid=BB2CC071F457538C5E58458FC5893E5B\">MongoDB 1.8 Improves Reliability with Journaling<\/a><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9762\u5411\u6587\u6863\u7684\u6570\u636e\u5e93\u5f15\u64ceMongoDB\u57283\u670816\u65e5\u53d1\u5e03\u4e861.8\u7248\u672c\u3002\u5173\u952e\u7684\u53d8\u66f4\u5305\u62ec\u65b0\u589eJournaling\u65e5\u5fd7\u3001\u63d0\u5347\u5206\u7247\u6027\u80fd\u4ee5\u53caShell\u7684Tab\u200b\u8865\u5168\u3002\u200b Journaling\u65e5\u5fd7\u901a\u8fc7\u9884\u5199\u5f0f\u7684Redo\u65e5\u5fd7\u4e3aMongoDB\u589e\u52a0\u4e86\u989d\u5916\u7684\u53ef\u9760\u6027\u3002\u5f00\u542f\u8be5\u529f\u80fd\u65f6\uff0c\u53d8\u66f4\u4f1a\u5148\u5199\u5165Journaling\u65e5\u5fd7\uff0c\u200b \u5b9a\u671f\u96c6\u4e2d\u63d0\u4ea4\uff08\u76ee\u524d\u662f\u6bcf100ms\u63d0\u4ea4\u4e00\u6b21\uff09\u200b\uff0c\u7136\u540e\u5728\u771f\u5b9e\u6570\u636e\u4e0a\u8fdb\u884c\u8fd9\u4e9b\u53d8\u66f4\u3002\u5982\u679c\u670d\u52a1\u5668\u5b89\u5168\u5173\u95ed\uff0c\u65e5\u5fd7\u4f1a\u88ab\u6e05\u9664\u3002\u5728\u670d\u52a1\u5668\u542f\u52a8\u65f6\uff0c\u5982\u679c\u5b58\u5728 Journaling\u65e5\u5fd7\u200b\uff0c\u5219\u4f1a\u8fdb\u884c\u56de\u653e\u3002\u8fd9\u4fdd\u8bc1\u4e86\u90a3\u4e9b\u5df2\u5199\u5165\uff0c\u4f46\u5728\u670d\u52a1\u5668\u5d29\u6e83\u524d\u8fd8\u6ca1\u6709\u56de\u653e\u7684\u200b\u65e5\u5fd7\u80fd\u5728\u7528\u6237\u8fde\u63a5\u524d\u200b\u88ab\u6267\u884c\u3002\u200b\u4e24\u6b21\u63d0\u4ea4\u4e4b\u95f4\u90a3 100ms\u7684\u65f6\u95f4\u7a97\u53e3\u200b\u5728\u672a\u6765\u7684\u7248\u672c\u4e2d\u6709\u671b\u88ab\u7f29\u5c0f\u3002 MongoDB\u662f\u200b\u4e00\u79cd NoSQL\u6570\u636e\u5e93\u200b\uff0c\u4e0d\u540c\u4e8eSQL Server\u8fd9\u6837\u7684\u5173\u7cfb\u578b\u6570\u636e\u5e93\uff0cMongoDB\u4e2d\u6570\u636e\u7684\u57fa\u672c\u5355\u4f4d\u662f\u6587\u6863\u3002\u7c7b\u4f3c\u4e8eJavaScript\u5bf9\u8c61\uff0c\u6587\u6863\u4e2d\u5305\u542b\u4e00\u7cfb\u5217\u5e26\u6709\u7c7b\u578b\u7684\u952e\u503c\u5bf9\u200b\uff0c\u8fd9\u4e9b\u7c7b\u578b\u53ef\u4ee5\u662f\u5b57\u7b26\u4e32\u3001\u5bf9\u8c61\u3001\u6570\u7ec4\u3001\u6b63\u5219\u8868\u8fbe\u5f0f\u548c\u4ee3\u7801\u3002\u200b\u8fd9\u4e9b\u6587\u6863\u4ee5\u200bBSON\u683c\u5f0f\u5b58 \u50a8\u200b\uff0c\u6839\u636e\u6587\u6863\u7c7b\u578b\u88ab\u5206\u7ec4\u5230\u96c6\u5408\uff08\u7c7b\u4f3c\u4e8eSQL 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Covered\u7d22\u5f15\u548cSparse\u7d22\u5f15\u4e5f\u662f\u8be5\u7248\u672c\u4e2d\u65b0\u589e\u52a0\u7684\u7279\u6027\u3002\u200bCovered\u7d22\u5f15\u5141\u8bb8\u200b\u5728\u7d22\u5f15\u672c\u8eab\u91cc\u5b58\u50a8\u6570\u636e\uff0c\u800c\u200bSparse\u7d22\u5f15\u5219\u4f1a\u6392\u9664\u6389\u4e0d\u5305\u542b\u7d22\u5f15\u5b57\u6bb5\u7684\u6587\u6863\u3002Covered\u7d22\u5f15\u5728\u67e5\u8be2\u6240\u8bf7\u6c42\u7684\u5168\u90e8\u5b57\u6bb5\u200b\u90fd\u5305\u542b\u5728Covered\u7d22\u5f15\u4e2d\u65f6\u80fd\u63d0\u5347\u6027\u80fd\uff0c\u56e0\u4e3a\u4e0d\u518d\u9700\u8981\u53d6\u51fa\u5b8c\u6574\u7684\u6587\u6863\u8bb0\u5f55\u3002Sparse\u7d22\u5f15\u5728\u6240\u68c0\u7d22\u7684\u5b57\u6bb5\u5e76\u975e\u7ecf\u5e38\u51fa\u73b0\u5728\u96c6\u5408\u4e2d\u65f6\u80fd\u63d0\u5347\u6027\u80fd\u3002\u76ee\u524d\uff0cSparse\u7d22\u5f15\u53ea\u80fd\u6709\u4e00\u4e2a\u5b57\u6bb5\u3002\u200b \u5728MongoDB\u7684\u5de5\u5177\u96c6\u4e2d\u4e5f\u6709\u4e00\u4e9b\u53d8\u5316\u3002mongostat \u589e\u52a0\u4e86\u200bdiscover\u6a21\u5f0f\uff08&#8211;discover\uff09\u200b\uff0c\u5b83\u4f1a\u81ea\u52a8\u4ece\u96c6\u7fa4\u7684\u8282\u70b9\u4e2d\u53d6\u56de\u7edf\u8ba1\u4fe1\u606f\u3002\u200b\u901a\u8fc7mongodump \u2013oplog \u548cmongorestore \u2013oplogReplay\u63d0\u4f9b\u4e86\u9ad8\u7ea7\u4e8b\u52a1\u65e5\u5fd7\u8f6c\u50a8\u548c\u6062\u590d\u200b\u529f\u80fd\u3002\u200b \u6b32\u66f4\u591a\u5730\u4e86\u89e3\u8be5\u7248\u672c\u4e2d\u7684\u65b0\u7279\u6027\uff0c\u8bf7\u67e5\u770bMongoDB 1.8 Webinar\u3002 \u67e5\u770b\u82f1\u6587\u539f\u6587\uff1aMongoDB 1.8 Improves Reliability with Journaling 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