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Hyper-V\u3001KVM\u306a\u3069\uff09\u304c\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u3092\u53d6\u5f97\u3059\u308b\u969b\u3001\u30c7\u30a3\u30b9\u30af\u3092\u30b3\u30d4\u30fc\u3059\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u305d\u306e\u4ee3\u308f\u308a\u306b\u3001\u73fe\u5728\u306e\u4eee\u60f3\u30c7\u30a3\u30b9\u30af\u30d5\u30a1\u30a4\u30eb\uff08\u4f8b\uff1a<code>.vmdk<\/code>\u3084<code>.vhdx<\/code>\uff09\u3092\u8aad\u307f\u53d6\u308a\u5c02\u7528\u72b6\u614b\u306b\u56fa\u5b9a\u3057\u3001\u65b0\u3057\u3044\u30c7\u30eb\u30bf\u30c7\u30a3\u30b9\u30af\uff08\u5dee\u5206\u30c7\u30a3\u30b9\u30af\uff09\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002\u305d\u308c\u4ee5\u964d\u306e\u66f8\u304d\u8fbc\u307f\u306f\u3059\u3079\u3066\u3001\u3053\u306e\u30c7\u30eb\u30bf\u30c7\u30a3\u30b9\u30af\u306b\u5411\u3051\u3089\u308c\u307e\u3059\u3002<\/p>\n<p>\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u304c\u524a\u9664\u3055\u308c\u308b\u3068\u3001\u30cf\u30a4\u30d1\u30fc\u30d0\u30a4\u30b6\u30fc\u306f\u30c7\u30eb\u30bf\u30c7\u30a3\u30b9\u30af\u306e\u30c7\u30fc\u30bf\u3092\u30d9\u30fc\u30b9\u30c7\u30a3\u30b9\u30af\u306b\u30b3\u30df\u30c3\u30c8\uff08\u7d71\u5408\uff09\u3057\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u6a19\u6e96\u7684\u306a\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u306f\u3001\u30b2\u30b9\u30c8OS\u5185\u3067\u5b9f\u884c\u3055\u308c\u3066\u3044\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u5168\u304f\u8a8d\u8b58\u3057\u3066\u3044\u307e\u305b\u3093\u3002\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u306f\u3001\u305d\u306e\u30de\u30a4\u30af\u30ed\u79d2\u6642\u70b9\u3067\u306e\u30c7\u30a3\u30b9\u30af\u72b6\u614b\u3092\u305d\u306e\u307e\u307e\u30ad\u30e3\u30d7\u30c1\u30e3\u3057\u307e\u3059\u3002<\/p>\n<h3>\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306f\u3069\u306e\u3088\u3046\u306b\u72b6\u614b\u3092\u7ba1\u7406\u3059\u308b\u304b<\/h3>\n<p>\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306f\u3001ACID\u7279\u6027\uff08\u539f\u5b50\u6027\u3001\u4e00\u8cab\u6027\u3001\u72ec\u7acb\u6027\u3001\u6c38\u7d9a\u6027\uff09\u306b\u57fa\u3065\u3044\u3066\u8a2d\u8a08\u3055\u308c\u3066\u3044\u307e\u3059\u3002ACID\u6e96\u62e0\u3092\u7dad\u6301\u3057\u3064\u3064\u9ad8\u3044\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5b9f\u73fe\u3059\u308b\u305f\u3081\u306b\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306f\u3059\u3079\u3066\u306e\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u3092\u5373\u5ea7\u306b\u30c7\u30a3\u30b9\u30af\u4e0a\u306e\u30d7\u30e9\u30a4\u30de\u30ea\u30c7\u30fc\u30bf\u30d5\u30a1\u30a4\u30eb\u3078\u76f4\u63a5\u66f8\u304d\u8fbc\u3080\u3053\u3068\u306f\u3057\u307e\u305b\u3093\u3002\u305d\u306e\u4ee3\u308f\u308a\u3001\u8907\u96d1\u306a\u591a\u5c64\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\uff1a<\/p>\n<ol>\n<li><strong>\u30d0\u30c3\u30d5\u30a1\u30d7\u30fc\u30eb 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\u5b9a\u671f\u7684\u306b\u3001\u30e1\u30e2\u30ea\u5185\u306e\u5909\u66f4\u3055\u308c\u305f\uff08\u30c0\u30fc\u30c6\u30a3\uff09\u30da\u30fc\u30b8\u3092\u30c7\u30a3\u30b9\u30af\u4e0a\u306e\u5b9f\u969b\u306e\u30c7\u30fc\u30bf\u30d5\u30a1\u30a4\u30eb\u3078\u30d5\u30e9\u30c3\u30b7\u30e5\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n<p>\u3053\u306e\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306e\u305f\u3081\u3001\u30c7\u30a3\u30b9\u30af\u4e0a\u306e\u7269\u7406\u30c7\u30fc\u30bf\u30d5\u30a1\u30a4\u30eb\u306f\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u5b9f\u969b\u306e\u72b6\u614b\u3068\u540c\u671f\u304c\u53d6\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u304c\u307b\u3068\u3093\u3069\u3067\u3059\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u771f\u306e\u72b6\u614b\u306f\u3001\u30c7\u30a3\u30b9\u30af\u4e0a\u306e\u30c7\u30fc\u30bf\u30d5\u30a1\u30a4\u30eb\u3001WAL\/Redo\u30ed\u30b0\u3001\u305d\u3057\u3066\u73fe\u5728\u30e1\u30e2\u30ea\u4e0a\u306b\u5b58\u5728\u3059\u308b\u30c7\u30fc\u30bf\u306e\u7d44\u307f\u5408\u308f\u305b\u306b\u3088\u3063\u3066\u306e\u307f\u5b58\u5728\u3057\u307e\u3059\u3002<\/p>\n<h2>\u5371\u967a\u5730\u5e2f\uff1aVM\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u4e2d\u306b\u4f55\u304c\u8d77\u3053\u308b\u304b<\/h2>\n<p>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b5\u30fc\u30d0\u30fc\u306e\u6a19\u6e96\u7684\u306aVM\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u3092\u53d6\u5f97\u3059\u308b\u5834\u5408\u3001\u305d\u308c\u306f<strong>\u30af\u30e9\u30c3\u30b7\u30e5\u6574\u5408\u6027\uff08crash-consistent\uff09<\/strong>\u306e\u3042\u308b\u72b6\u614b\u3092\u30ad\u30e3\u30d7\u30c1\u30e3\u3057\u3066\u3044\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3>\u30af\u30e9\u30c3\u30b7\u30e5\u6574\u5408\u6027\u3068\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u6574\u5408\u6027<\/h3>\n<p>\u30af\u30e9\u30c3\u30b7\u30e5\u6574\u5408\u6027\u306e\u3042\u308b\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u306f\u3001\u7269\u7406\u30b5\u30fc\u30d0\u30fc\u306e\u96fb\u6e90\u30b3\u30fc\u30c9\u3092\u7a81\u7136\u5f15\u304d\u629c\u304f\u306e\u3068\u540c\u3058\u3067\u3059\u3002\u30c7\u30a3\u30b9\u30af\u306e\u72b6\u614b\u306f\u30ad\u30e3\u30d7\u30c1\u30e3\u3055\u308c\u307e\u3059\u304c\u3001\u30e1\u30e2\u30ea\u5185\u306b\u3042\u3063\u305f\u3082\u306e\u306f\u5931\u308f\u308c\u3001\u30b9\u30c8\u30ec\u30fc\u30b8\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u30fc\u3078\u5411\u304b\u3063\u3066\u3044\u305f\u9014\u4e2d\u306e\u30c7\u30fc\u30bf\u306f\u7a81\u7136\u906e\u65ad\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u73fe\u4ee3\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306f\u5148\u884c\u66f8\u304d\u8fbc\u307f\u30ed\u30b0\u3092\u30ea\u30d7\u30ec\u30a4\u3059\u308b\u3053\u3068\u3067\u4e88\u671f\u305b\u306c\u96fb\u6e90\u65ad\u304b\u3089\u5fa9\u65e7\u3059\u308b\u3088\u3046\u306b\u8a2d\u8a08\u3055\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u30af\u30e9\u30c3\u30b7\u30e5\u30ea\u30ab\u30d0\u30ea\u3092\u4e3b\u8981\u306a\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u6226\u7565\u3068\u3057\u3066\u983c\u308b\u3053\u3068\u306f\u975e\u5e38\u306b\u5371\u967a\u3067\u3059\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304c\u8907\u6570\u306e\u4eee\u60f3\u30c7\u30a3\u30b9\u30af\u306b\u307e\u305f\u304c\u3063\u3066\u3044\u308b\u5834\u5408\uff08\u4f8b\uff1a\u30c7\u30fc\u30bf\u30d5\u30a1\u30a4\u30eb\u304c<code>\u30c9\u30e9\u30a4\u30d6D:<\/code>\u3001WAL\u304c<code>\u30c9\u30e9\u30a4\u30d6E:<\/code>\uff09\u3001\u30cf\u30a4\u30d1\u30fc\u30d0\u30a4\u30b6\u30fc\u304c\u4e21\u65b9\u306e\u30c7\u30a3\u30b9\u30af\u3092\u5168\u304f\u540c\u3058\u30de\u30a4\u30af\u30ed\u79d2\u3067\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u3059\u308b\u3068\u306f\u9650\u308a\u307e\u305b\u3093\u3002\u3082\u3057WAL\u30c7\u30a3\u30b9\u30af\u306e\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u304c\u30c7\u30fc\u30bf\u30c7\u30a3\u30b9\u30af\u306e\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u3088\u308a\u308f\u305a\u304b\u3067\u3082\u9045\u308c\u3066\u53d6\u5f97\u3055\u308c\u305f\u5834\u5408\u3001\u5fa9\u5143\u6642\u306b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306f\u30b7\u30fc\u30b1\u30f3\u30b9\u756a\u53f7\u3092\u7167\u5408\u3067\u304d\u305a\u3001\u81f4\u547d\u7684\u306a\u7834\u640d\u3092\u5f15\u304d\u8d77\u3053\u3057\u307e\u3059\u3002<\/p>\n<h3>\u9ad8\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30b7\u30b9\u30c6\u30e0\u306b\u304a\u3051\u308b\u300cVM\u30b9\u30bf\u30f3\u306e\u5f71\u97ff\u300d<\/h3>\n<p>\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u306e\u4f5c\u6210\u30d7\u30ed\u30bb\u30b9\u3001\u305d\u3057\u3066\u3055\u3089\u306b\u91cd\u8981\u306a\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u306e\u7d71\u5408\u30d7\u30ed\u30bb\u30b9\u306f\u3001\u300cVM\u30b9\u30bf\u30f3\uff08VM 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\/>\n* \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u63a5\u7d9a\u304c\u5207\u65ad\u3055\u308c\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u30bf\u30a4\u30e0\u30a2\u30a6\u30c8\u304c\u767a\u751f\u3059\u308b\u3002<br \/>\n* \u9ad8\u53ef\u7528\u6027\u30af\u30e9\u30b9\u30bf\u30fc\uff08SQL Server Always On\u3001PostgreSQL Patroni\u3001MySQL Galera\u306a\u3069\uff09\u304c\u30cf\u30fc\u30c8\u30d3\u30fc\u30c8\u30c1\u30a7\u30c3\u30af\u3092\u898b\u9003\u3059\u3002<br \/>\n* \u30af\u30e9\u30b9\u30bf\u30fc\u304c\u30b9\u30bf\u30f3\u3057\u305f\u30ce\u30fc\u30c9\u3092\u300c\u6b7b\u4ea1\u300d\u3068\u5224\u65ad\u3057\u3001\u4e0d\u8981\u3067\u7834\u58ca\u7684\u306a\u30d5\u30a7\u30a4\u30eb\u30aa\u30fc\u30d0\u30fc\uff08\u30b9\u30d7\u30ea\u30c3\u30c8\u30d6\u30ec\u30a4\u30f3\u30b7\u30ca\u30ea\u30aa\uff09\u3092\u5f15\u304d\u8d77\u3053\u3059\u3002<\/p>\n<h3>\u30da\u30fc\u30b8\u7834\u640d\u3068I\/O\u306e\u4e0d\u6574\u5408<\/h3>\n<p>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a8\u30f3\u30b8\u30f3\u306f\u901a\u5e38\u3001\u7279\u5b9a\u306e\u30da\u30fc\u30b8\u30b5\u30a4\u30ba\uff08PostgreSQL\u3084SQL Server\u3067\u306f8KB\u3001InnoDB\u3067\u306f16KB\u306a\u3069\uff09\u3067\u30c7\u30fc\u30bf\u3092\u66f8\u304d\u8fbc\u307f\u307e\u3059\u3002\u3057\u304b\u3057\u3001\u57fa\u76e4\u3068\u306a\u308bOS\u3084\u30b9\u30c8\u30ec\u30fc\u30b8\u30a2\u30ec\u30a4\u306f\u3001\u3088\u308a\u5c0f\u3055\u306a\u30d6\u30ed\u30c3\u30af\uff084KB\u3084512\u30d0\u30a4\u30c8\u306a\u3069\uff09\u3067I\/O\u3092\u51e6\u7406\u3057\u307e\u3059\u3002<\/p>\n<p>\u30cf\u30a4\u30d1\u30fc\u30d0\u30a4\u30b6\u30fc\u304c\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306b\u3088\u308b8KB\u30da\u30fc\u30b8\u306e\u66f8\u304d\u8fbc\u307f\u4e2d\u306b\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u3092\u53d6\u5f97\u3059\u308b\u3068\u3001\u65b0\u3057\u3044\u30c7\u30fc\u30bf\u306e\u6700\u521d\u306e4KB\u3068\u53e4\u3044\u30c7\u30fc\u30bf\u306e\u6700\u5f8c\u306e4KB\u3092\u30ad\u30e3\u30d7\u30c1\u30e3\u3057\u3066\u3057\u307e\u3046\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u304c<strong>\u30da\u30fc\u30b8\u7834\u640d\uff08torn page\uff09<\/strong>\u3092\u5f15\u304d\u8d77\u3053\u3057\u307e\u3059\u3002\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u3092\u5fa9\u5143\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306f\u30da\u30fc\u30b8\u3092\u8aad\u307f\u8fbc\u307f\u307e\u3059\u304c\u3001\u30c1\u30a7\u30c3\u30af\u30b5\u30e0\u691c\u8a3c\u306b\u5931\u6557\u3057\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u7834\u640d\u72b6\u614b\u3068\u3057\u3066\u30de\u30fc\u30af\u3057\u307e\u3059\u3002<\/p>\n<h2>\u7279\u5b9a\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a8\u30f3\u30b8\u30f3\u306b\u304a\u3051\u308b\u73fe\u5b9f\u7684\u306a\u5f71\u97ff<\/h2>\n<p>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a8\u30f3\u30b8\u30f3\u3054\u3068\u306b\u30af\u30e9\u30c3\u30b7\u30e5\u6574\u5408\u6027\u306e\u3042\u308b\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u3078\u306e\u53cd\u5fdc\u306f\u7570\u306a\u308a\u307e\u3059\u304c\u3001\u672c\u756a\u74b0\u5883\u306b\u304a\u3044\u3066\u9069\u5207\u306b\u51e6\u7406\u3067\u304d\u308b\u3082\u306e\u306f\u4e00\u3064\u3082\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<ul>\n<li><strong>PostgreSQL\uff1a<\/strong> PostgreSQL\u306f<code>pg_wal<\/code>\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306b\u5927\u304d\u304f\u4f9d\u5b58\u3057\u3066\u3044\u307e\u3059\u3002\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u304c\u30c7\u30fc\u30bf\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\uff08<code>$PGDATA<\/code>\uff09\u3068WAL\u3092\u540c\u671f\u305b\u305a\u306b\u30ad\u30e3\u30d7\u30c1\u30e3\u3057\u305f\u5834\u5408\u3001PostgreSQL\u306f\u8d77\u52d5\u306b\u5931\u6557\u3057\u3001<code>PANIC: could not locate a valid checkpoint record<\/code>\u3068\u3044\u3046\u30a8\u30e9\u30fc\u3092\u30b9\u30ed\u30fc\u3057\u307e\u3059\u3002<\/li>\n<li><strong>MySQL\/InnoDB\uff1a<\/strong> InnoDB\u306f\u30da\u30fc\u30b8\u7834\u640d\u3092\u9632\u3050\u305f\u3081\u306b\u30c0\u30d6\u30eb\u30e9\u30a4\u30c8\u30d0\u30c3\u30d5\u30a1\u3092\u4f7f\u7528\u3057\u3066\u304a\u308a\u3001\u30af\u30e9\u30c3\u30b7\u30e5\u6574\u5408\u6027\u306e\u3042\u308b\u72b6\u614b\u306b\u5bfe\u3057\u3066\u3042\u308b\u7a0b\u5ea6\u306e\u4fdd\u8b77\u3092\u63d0\u4f9b\u3057\u307e\u3059\u3002\u3057\u304b\u3057\u3001<code>ibdata1<\/code>\u30d5\u30a1\u30a4\u30eb\u3068<code>ib_logfile<\/code>\u304c\u540c\u671f\u305b\u305a\u306b\u30ad\u30e3\u30d7\u30c1\u30e3\u3055\u308c\u305f\u5834\u5408\u3001InnoDB\u30a8\u30f3\u30b8\u30f3\u306f\u30ea\u30ab\u30d0\u30ea\u6642\u306b\u30af\u30e9\u30c3\u30b7\u30e5\u3057\u307e\u3059\u3002<\/li>\n<li><strong>Microsoft SQL Server\uff1a<\/strong> SQL Server\u306fI\/O\u306e\u30d5\u30ea\u30fc\u30ba\u306b\u5bfe\u3057\u3066\u975e\u5e38\u306b\u654f\u611f\u3067\u3059\u3002\u9069\u5207\u306aVSS\uff08\u30dc\u30ea\u30e5\u30fc\u30e0\u30b7\u30e3\u30c9\u30a6\u30b3\u30d4\u30fc\u30b5\u30fc\u30d3\u30b9\uff09\u306e\u7d71\u5408\u306a\u3057\u306b\u6a19\u6e96\u7684\u306aVM\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u304b\u3089SQL Server\u3092\u5fa9\u5143\u3059\u308b\u3068\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304c\u300csuspect\uff08\u7591\u308f\u3057\u3044\uff09\u300d\u72b6\u614b\u306b\u306a\u308a\u3001\u30ed\u30b0\u30c1\u30a7\u30fc\u30f3\u304c\u7834\u640d\u3057\u3066\u3001\u30dd\u30a4\u30f3\u30c8\u30a4\u30f3\u30bf\u30a4\u30e0\u30ea\u30ab\u30d0\u30ea\uff08PITR\uff09\u6a5f\u80fd\u304c\u5931\u308f\u308c\u308b\u3053\u3068\u304c\u3088\u304f\u3042\u308a\u307e\u3059\u3002<\/li>\n<\/ul>\n<h2>\u4eee\u60f3\u5316\u3055\u308c\u305f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u5b89\u5168\u306b\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3059\u308b\u305f\u3081\u306e\u30d9\u30b9\u30c8\u30d7\u30e9\u30af\u30c6\u30a3\u30b9<\/h2>\n<p>\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u4fdd\u8b77\u3059\u308b\u306b\u306f\u3001\u30af\u30e9\u30c3\u30b7\u30e5\u6574\u5408\u6027\u306e\u3042\u308b\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u304b\u3089<strong>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u6574\u5408\u6027\uff08application-consistent\uff09<\/strong>\u306e\u3042\u308b\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3078\u79fb\u884c\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u306f\u3001\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u30e1\u30ab\u30cb\u30ba\u30e0\u304c\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a8\u30f3\u30b8\u30f3\u3068\u901a\u4fe1\u3057\u3001\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u53d6\u5f97\u4e2d\u306b\u30e1\u30e2\u30ea\u3092\u30c7\u30a3\u30b9\u30af\u3078\u30d5\u30e9\u30c3\u30b7\u30e5\u3055\u305b\u3001I\/O\u64cd\u4f5c\u3092\u4e00\u6642\u7684\u306b\u505c\u6b62\u3055\u305b\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3>1. \u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5bfe\u5fdc\u306e\u9759\u6b62\uff08VSS\u304a\u3088\u3073fsfreeze\uff09\u3092\u6d3b\u7528\u3059\u308b<\/h3>\n<p><strong>Windows\u306e\u5834\u5408\uff08SQL Server\uff09\uff1a<\/strong><br \/>\n\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u304cMicrosoft\u30dc\u30ea\u30e5\u30fc\u30e0\u30b7\u30e3\u30c9\u30a6\u30b3\u30d4\u30fc\u30b5\u30fc\u30d3\u30b9\uff08VSS\uff09\u3092\u5229\u7528\u3057\u3066\u3044\u308b\u3053\u3068\u3092\u5e38\u306b\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002VSS\u5bfe\u5fdc\u306e\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u304c\u30c8\u30ea\u30ac\u30fc\u3055\u308c\u308b\u3068\u3001SQL Server VSS Writer\u304c\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306eI\/O\u3092\u30d5\u30ea\u30fc\u30ba\u3057\u3001\u4fdd\u7559\u4e2d\u306e\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u3092\u30c7\u30a3\u30b9\u30af\u306b\u30d5\u30e9\u30c3\u30b7\u30e5\u3057\u3066\u3001\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u304c\u5b8c\u5168\u306b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u6574\u5408\u6027\u3092\u4fdd\u3064\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n<p><strong>Linux\u306e\u5834\u5408\uff08PostgreSQL \/ MySQL\uff09\uff1a<\/strong><br \/>\nLinux\u306b\u306fVSS\u306b\u76f8\u5f53\u3059\u308b\u30cd\u30a4\u30c6\u30a3\u30d6\u6a5f\u80fd\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u6574\u5408\u6027\u3092\u5b9f\u73fe\u3059\u308b\u306b\u306f\u3001\u30cf\u30a4\u30d1\u30fc\u30d0\u30a4\u30b6\u30fc\u306e\u30b2\u30b9\u30c8\u30c4\u30fc\u30eb\uff08VMware Tools\u306a\u3069\uff09\u3068\u9023\u643a\u3057\u3066\u3001\u30d7\u30ea\u30d5\u30ea\u30fc\u30ba\uff08pre-freeze\uff09\u304a\u3088\u3073\u30dd\u30b9\u30c8\u30bd\u30a6\uff08post-thaw\uff09\u30b9\u30af\u30ea\u30d7\u30c8\u3092\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u4e0b\u306f\u3001PostgreSQL 15\u4ee5\u964d\u3067\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u7528\u306b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u5b89\u5168\u306b\u6e96\u5099\u3059\u308b\u305f\u3081\u306eVMware <code>pre-freeze-script<\/code>\u306e\u4f8b\u3067\u3059\uff1a<\/p>\n<pre><code class=\"language-bash\">#!\/bin\/bash\n# \/usr\/sbin\/pre-freeze-script\n# \u3053\u306e\u30b9\u30af\u30ea\u30d7\u30c8\u304c\u5b9f\u884c\u53ef\u80fd\u3067\u3042\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044 (chmod +x)\n\n# 1. PostgreSQL\u306b\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u306e\u6e96\u5099\u3092\u6307\u793a\nsu - postgres -c \"psql -c \"SELECT pg_backup_start('vm_snapshot', true);\"\"\n\n# 2. \u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u306e\u30d0\u30c3\u30d5\u30a1\u3092\u30c7\u30a3\u30b9\u30af\u306b\u30d5\u30e9\u30c3\u30b7\u30e5\nsync\n\n# 3. \u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u3092\u30d5\u30ea\u30fc\u30ba (\u30c7\u30fc\u30bf\u304c \/var\/lib\/pgsql \u306b\u3042\u308b\u3068\u4eee\u5b9a)\nfsfreeze -f \/var\/lib\/pgsql\n<\/code><\/pre>\n<p>\u305d\u3057\u3066\u3001\u64cd\u4f5c\u3092\u518d\u958b\u3059\u308b\u305f\u3081\u306e\u5bfe\u5fdc\u3059\u308b<code>post-thaw-script<\/code>\u3067\u3059\uff1a<\/p>\n<pre><code class=\"language-bash\">#!\/bin\/bash\n# \/usr\/sbin\/post-thaw-script\n\n# 1. \u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u306e\u30d5\u30ea\u30fc\u30ba\u3092\u89e3\u9664\nfsfreeze -u \/var\/lib\/pgsql\n\n# 2. PostgreSQL\u306b\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u5b8c\u4e86\u3092\u901a\u77e5\nsu - postgres -c \"psql -c \"SELECT pg_backup_stop();\"\"\n<\/code><\/pre>\n<h3>2. \u30cd\u30a4\u30c6\u30a3\u30d6\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u3092\u4f7f\u7528\u3059\u308b<\/h3>\n<p>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u6574\u5408\u6027\u306e\u3042\u308b\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u306f\u6a19\u6e96\u7684\u306a\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u3088\u308a\u512a\u308c\u3066\u3044\u307e\u3059\u304c\u3001\u4f9d\u7136\u3068\u3057\u3066VM\u30b9\u30bf\u30f3\u306e\u30ea\u30b9\u30af\u3092\u4f34\u3044\u307e\u3059\u3002\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u306b\u3068\u3063\u3066\u6700\u3082\u5b89\u5168\u306a\u30a2\u30d7\u30ed\u30fc\u30c1\u306f\u3001\u30cf\u30a4\u30d1\u30fc\u30d0\u30a4\u30b6\u30fc\u304b\u3089\u72ec\u7acb\u3057\u3066\u52d5\u4f5c\u3059\u308b\u30cd\u30a4\u30c6\u30a3\u30d6\u306e\u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u30e6\u30fc\u30c6\u30a3\u30ea\u30c6\u30a3\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n<p><strong>PostgreSQL (pg_basebackup)\uff1a<\/strong><\/p>\n<pre><code class=\"language-bash\">pg_basebackup -h localhost -U replication_user -D \/mnt\/backups\/pg_backup -Ft -z -P\n<\/code><\/pre>\n<p><strong>MySQL\/MariaDB (Percona XtraBackup \/ Mariabackup)\uff1a<\/strong><br \/>\n\u3053\u308c\u3089\u306e\u30c4\u30fc\u30eb\u306f\u3001\u30c7\u30fc\u30bf\u30d5\u30a1\u30a4\u30eb\u3092\u30b3\u30d4\u30fc\u3057\u306a\u304c\u3089Redo\u30ed\u30b0\u306e\u5909\u66f4\u3092\u8ffd\u8de1\u3059\u308b\u3053\u3068\u3067\u3001\u30d6\u30ed\u30c3\u30ad\u30f3\u30b0\u306a\u3057\u306e\u30db\u30c3\u30c8\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002<\/p>\n<pre><code class=\"language-bash\">mariabackup --backup --target-dir=\/mnt\/backups\/mysql_backup --user=root --password=SecurePass\n<\/code><\/pre>\n<p><strong>SQL Server (T-SQL)\uff1a<\/strong><\/p>\n<pre><code class=\"language-sql\">BACKUP DATABASE [ProductionDB] \nTO DISK = N'Z:BackupsProductionDB.bak' \nWITH NOFORMAT, NOINIT, NAME = N'ProductionDB-Full Backup', \nSKIP, NOREWIND, NOUNLOAD, COMPRESSION, STATS = 10;\nGO\n<\/code><\/pre>\n<h3>3. \u30ed\u30b0\u30a2\u30fc\u30ab\u30a4\u30d6\u306b\u3088\u308b\u30dd\u30a4\u30f3\u30c8\u30a4\u30f3\u30bf\u30a4\u30e0\u30ea\u30ab\u30d0\u30ea\uff08PITR\uff09\u306e\u5b9f\u88c5<\/h3>\n<p>\u65e5\u6b21\u306e\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u3084\u30d5\u30eb\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u306f\u3001\u53d6\u5f97\u3057\u305f\u6642\u70b9\u307e\u3067\u306e\u30c7\u30fc\u30bf\u3057\u304b\u4fdd\u8b77\u3057\u307e\u305b\u3093\u3002\u5348\u5f8c4\u6642\u306b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u304c\u30af\u30e9\u30c3\u30b7\u30e5\u3057\u3001\u6700\u5f8c\u306e\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u304c\u5348\u524d2\u6642\u3060\u3063\u305f\u5834\u5408\u300114\u6642\u9593\u5206\u306e\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30c7\u30fc\u30bf\u304c\u5931\u308f\u308c\u307e\u3059\u3002<\/p>\n<p>\u771f\u306e\u30a8\u30f3\u30bf\u30fc\u30d7\u30e9\u30a4\u30ba\u30ec\u30d9\u30eb\u306e\u56de\u5fa9\u529b\u3092\u5b9f\u73fe\u3059\u308b\u306b\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u6574\u5408\u6027\u306e\u3042\u308b\u30d5\u30eb\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3068\u3001\u7d99\u7d9a\u7684\u306a\u30ed\u30b0\u30a2\u30fc\u30ab\u30a4\u30d6\uff08\u6570\u5206\u3054\u3068\u306bWAL\u3001Redo\u30ed\u30b0\u3001\u307e\u305f\u306f\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30ed\u30b0\u3092\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3059\u308b\uff09\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001DBA\u306f\u707d\u5bb3\u767a\u751f\u524d\u306e\u7279\u5b9a\u306e\u5206\u3001\u3042\u308b\u3044\u306f\u7279\u5b9a\u306e\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3ID\u307e\u3067\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u3092\u5fa9\u5143\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h2>CloudSave\u306b\u3088\u308b\u30a8\u30f3\u30bf\u30fc\u30d7\u30e9\u30a4\u30ba\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u6226\u7565<\/h2>\n<p>\u6570\u5341\u53f0\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30b5\u30fc\u30d0\u30fc\u306b\u308f\u305f\u308b\u30ab\u30b9\u30bf\u30e0\u306e\u30d7\u30ea\u30d5\u30ea\u30fc\u30ba\u30b9\u30af\u30ea\u30d7\u30c8\u3001\u30cd\u30a4\u30c6\u30a3\u30d6\u30c0\u30f3\u30d7\u7528\u306ecron\u30b8\u30e7\u30d6\u3001\u30ed\u30b0\u30b7\u30c3\u30d4\u30f3\u30b0\u3092\u7ba1\u7406\u3059\u308b\u3053\u3068\u306f\u3001DevOps\u30c1\u30fc\u30e0\u306b\u3068\u3063\u3066\u904b\u7528\u4e0a\u306e\u60aa\u5922\u3067\u3059\u3002\u3053\u3053\u3067\u3001CloudSave\u306e\u3088\u3046\u306a\u30a8\u30f3\u30bf\u30fc\u30d7\u30e9\u30a4\u30ba\u30b0\u30ec\u30fc\u30c9\u306e\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u304c\u4e0d\u53ef\u6b20\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>CloudSave\u306f\u3001\u4eee\u60f3\u5316\u3068\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3\u306e\u9593\u306e\u30ae\u30e3\u30c3\u30d7\u3092\u57cb\u3081\u307e\u3059\u3002\u76f2\u76ee\u7684\u306a\u30cf\u30a4\u30d1\u30fc\u30d0\u30a4\u30b6\u30fc\u306e\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u306b\u983c\u308b\u306e\u3067\u306f\u306a\u304f\u3001CloudSave\u306fSQL Server\u3001PostgreSQL\u3001MySQL\u3001Oracle\u3068\u30cd\u30a4\u30c6\u30a3\u30d6\u306b\u7d71\u5408\u3059\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5bfe\u5fdc\u30a8\u30fc\u30b8\u30a7\u30f3\u30c8\u3092\u5229\u7528\u3057\u307e\u3059\u3002<\/p>\n<p>CloudSave\u304c\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3092\u958b\u59cb\u3059\u308b\u3068\uff1a<br \/>\n1. \u30cd\u30a4\u30c6\u30a3\u30d6API\uff08Windows\u306e\u5834\u5408\u306fVSS\u3001Linux\u306e\u5834\u5408\u306f\u30cd\u30a4\u30c6\u30a3\u30d6WAL\u30b9\u30c8\u30ea\u30fc\u30df\u30f3\u30b0\u306a\u3069\uff09\u3092\u4ecb\u3057\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30a8\u30f3\u30b8\u30f3\u3068\u76f4\u63a5\u901a\u4fe1\u3057\u307e\u3059\u3002<br \/>\n2. \u7834\u58ca\u7684\u306aVM\u30b9\u30bf\u30f3\u3092\u5f15\u304d\u8d77\u3053\u3059\u3053\u3068\u306a\u304f\u3001\u30e1\u30e2\u30ea\u30d0\u30c3\u30d5\u30a1\u304b\u3089\u30c7\u30a3\u30b9\u30af\u3078\u306e\u30d5\u30e9\u30c3\u30b7\u30e5\u3092\u8abf\u6574\u3057\u307e\u3059\u3002<br \/>\n3. \u30c7\u30fc\u30bf\u30d5\u30a1\u30a4\u30eb\u3092\u5b89\u5168\u306b\u30ad\u30e3\u30d7\u30c1\u30e3\u3057\u3001\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30ed\u30b0\u306e\u5207\u308a\u6368\u3066\u3092\u81ea\u52d5\u7684\u306b\u7ba1\u7406\u3057\u307e\u3059\u3002<br \/>\n4. \u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30ed\u30b0\u3092\u7d99\u7d9a\u7684\u306b\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u3057\u3001\u6570\u56de\u306e\u30af\u30ea\u30c3\u30af\u3067\u8a73\u7d30\u306a\u30dd\u30a4\u30f3\u30c8\u30a4\u30f3\u30bf\u30a4\u30e0\u30ea\u30ab\u30d0\u30ea\uff08PITR\uff09\u3092\u53ef\u80fd\u306b\u3057\u307e\u3059\u3002<\/p>\n<p>\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u6574\u5408\u6027\u306e\u8907\u96d1\u3055\u3092CloudSave\u306b\u30aa\u30d5\u30ed\u30fc\u30c9\u3059\u308b\u3053\u3068\u3067\u3001DBA\u3084\u30b7\u30b9\u30c6\u30e0\u7ba1\u7406\u8005\u306f\u3001\u672c\u756a\u30af\u30e9\u30b9\u30bf\u30fc\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3084\u53ef\u7528\u6027\u3092\u72a0\u7272\u306b\u3059\u308b\u3053\u3068\u306a\u304f\u3001\u30c7\u30fc\u30bf\u306e\u6574\u5408\u6027\u3092\u4fdd\u8a3c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2>\u7d50\u8ad6<\/h2>\n<p>\u4eee\u60f3\u30de\u30b7\u30f3\u306e\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u306f\u30a4\u30f3\u30d5\u30e9\u7ba1\u7406\u306e\u305f\u3081\u306e\u7d20\u6674\u3089\u3057\u3044\u30c4\u30fc\u30eb\u3067\u3059\u304c\u3001\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306eACID\u8981\u4ef6\u3068\u306f\u6839\u672c\u7684\u306b\u4e92\u63db\u6027\u304c\u3042\u308a\u307e\u305b\u3093\u3002\u30af\u30e9\u30c3\u30b7\u30e5\u6574\u5408\u6027\u306e\u3042\u308b\u30cf\u30a4\u30d1\u30fc\u30d0\u30a4\u30b6\u30fc\u306e\u30b9\u30ca\u30c3\u30d7\u30b7\u30e7\u30c3\u30c8\u306b\u983c\u308b\u3053\u3068\u306f\u3001\u7d44\u7e54\u3092\u30da\u30fc\u30b8\u7834\u640d\u3001\u30ec\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u30c1\u30a7\u30fc\u30f3\u306e\u65ad\u7d76\u3001\u305d\u3057\u3066\u58ca\u6ec5\u7684\u306a\u30c7\u30fc\u30bf\u640d\u5931\u306e\u5371\u967a\u306b\u3055\u3089\u3059\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u30df\u30c3\u30b7\u30e7\u30f3\u30af\u30ea\u30c6\u30a3\u30ab\u30eb\u306a\u30c7\u30fc\u30bf\u3092\u4fdd\u8b77\u3059\u308b\u306b\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u5bfe\u5fdc\u306e\u9759\u6b62\u6a5f\u80fd\u3092\u5b9f\u88c5\u3057\u3001\u30cd\u30a4\u30c6\u30a3\u30d6\u306e\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u624b\u6cd5\u3092\u6d3b\u7528\u3057\u3001\u7d99\u7d9a\u7684\u306a\u30c8\u30e9\u30f3\u30b6\u30af\u30b7\u30e7\u30f3\u30ed\u30b0\u30a2\u30fc\u30ab\u30a4\u30d6\u3092\u7dad\u6301\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u76ee\u7684\u5225\u306b\u69cb\u7bc9\u3055\u308c\u305f\u30a8\u30f3\u30bf\u30fc\u30d7\u30e9\u30a4\u30ba\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3092\u63a1\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306e\u53ef\u7528\u6027\u3092\u9ad8\u304f\u4fdd\u3061\u3001\u5b8c\u5168\u306b\u5fa9\u65e7\u53ef\u80fd\u3067\u3001\u5b8c\u5168\u306b\u5b89\u5168\u306a\u72b6\u614b\u3092\u78ba\u4fdd\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&gt; Discover why standard VM snapshots cause data corruption in transactional databases like PostgreSQL and SQL Server. Learn DBA best practices for application-consistent backups, avoiding VM stun, and ensuring data integrity with CloudSave.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"rank_math_title":"Why VM Snapshots Are Unsafe for Transactional Databases","rank_math_description":"> Discover why standard VM snapshots cause data corruption in transactional databases like PostgreSQL and SQL Server. 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