{"height":"190","blog_title":"\u4e2d\u5e74engineer\u306e\u72ec\u308a\u8a00 - crumbjp","author_url":"https://blog.hatena.ne.jp/hiroppon/","width":"100%","description":"MongoDB\u306e\u30b9\u30c8\u30ec\u30fc\u30b8\u30a8\u30f3\u30b8\u30f3 \u30b3\u30b3\u3067\u89e6\u308c\u305f\u901a\u308a MongoDB\u306f\u66f8\u304d\u8fbc\u307f\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u53d7\u3051\u4ed8\u3051\u308b\u3068\u3001\u4e00\u65e6\u3001\u5185\u90e8\u30ad\u30e5\u30fc\u306b\u30c7\u30fc\u30bf\u3092\u7a4d\u307f\u3001 \u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u30b9\u30ec\u30c3\u30c9(journal)\u306b\u3088\u3063\u3066\u3001journal\u30d5\u30a1\u30a4\u30eb\u3068\u30c7\u30fc\u30bf\u30d5\u30a1\u30a4\u30eb\u306emmap\u9818\u57df\u306b\u66f8\u304d\u8fbc\u307e\u308c\u308b\u3002 \u305d\u306e\u5f8c\u3001\u66f4\u306b\u30d0\u30c3\u30af\u30b0\u30e9\u30a6\u30f3\u30c9\u30b9\u30ec\u30c3\u30c9(DataFileSync)\u306b\u3088\u3063\u3066msync()\u3055\u308c\u7121\u4e8b\u306b\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u8fbc\u307e\u308c\u308b\u4e8b\u306b\u306a\u3063\u3066\u3044\u308b\u3002 \u3053\u306e\u66f8\u304d\u8fbc\u3080\u52d5\u4f5c\u3092writeback\u547c\u3076 \u3057\u304b\u3057\u3001Linux\u3067\u306f\u3001mmap()\u9818\u57df\u306fmsync()\u305b\u305a\u3068\u3082kernel\u304c\u4e00\u5b9a\u9593\u9694\u3067\u66f8\u304d\u8fbc\u3093\u3067\u304f\u308c\u308b\u3002\u4eca\u56de\u306f\u3001\u3053\u306e\u8fba\u306e\u6319\u52d5\u306e\u8a71\u3002 MongoDB\u306ewriteb\u2026","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fcrumbjp.hateblo.jp%2Fentry%2F20130313%2F1363165322\" title=\"MongoDB\u306e\u30c7\u30fc\u30bf\u30d5\u30a1\u30a4\u30eb\u540c\u671f\u306b\u3064\u3044\u3066 - \u4e2d\u5e74engineer\u306e\u72ec\u308a\u8a00 - crumbjp\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","type":"rich","provider_name":"Hatena Blog","image_url":null,"version":"1.0","url":"https://crumbjp.hateblo.jp/entry/20130313/1363165322","published":"2013-03-13 18:02:02","blog_url":"https://crumbjp.hateblo.jp/","provider_url":"https://hatena.blog","categories":["mongodb"],"title":"MongoDB\u306e\u30c7\u30fc\u30bf\u30d5\u30a1\u30a4\u30eb\u540c\u671f\u306b\u3064\u3044\u3066","author_name":"hiroppon"}