{"id":5492,"date":"2026-06-15T14:01:13","date_gmt":"2026-06-15T14:01:13","guid":{"rendered":"https:\/\/cloudsave.app\/?p=5492"},"modified":"2026-06-15T16:01:15","modified_gmt":"2026-06-15T16:01:15","slug":"%d8%a8%db%86%da%86%db%8c-%d9%88%db%8e%d9%86%db%95%db%8c-%d8%b3%d8%a7%d8%aa%db%8c-vm-snapshots-%d8%a8%db%86-%d8%a8%d9%86%da%a9%db%95%d8%af%d8%b1%d8%a7%d9%88%db%95-%d9%85%d8%a7%d9%85%db%95%da%b5%db%95","status":"publish","type":"post","link":"https:\/\/cloudsave.app\/ku\/knowledge-base\/%d8%a8%db%86%da%86%db%8c-%d9%88%db%8e%d9%86%db%95%db%8c-%d8%b3%d8%a7%d8%aa%db%8c-vm-snapshots-%d8%a8%db%86-%d8%a8%d9%86%da%a9%db%95%d8%af%d8%b1%d8%a7%d9%88%db%95-%d9%85%d8%a7%d9%85%db%95%da%b5%db%95\/","title":{"rendered":"\u0628\u06c6\u0686\u06cc \u0648\u06ce\u0646\u06d5\u06cc \u0633\u0627\u062a\u06cc VM (Snapshots) \u0628\u06c6 \u0628\u0646\u06a9\u06d5\u062f\u0631\u0627\u0648\u06d5 \u0645\u0627\u0645\u06d5\u06b5\u06d5\u06cc\u06cc\u06d5\u06a9\u0627\u0646 \u0633\u06d5\u0644\u0627\u0645\u06d5\u062a 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\u0626\u06d5\u0646\u062c\u0627\u0645 \u062f\u06d5\u062f\u0627\u062a\u060c \u0626\u06d5\u0648 \u062f\u06cc\u0633\u06a9\u06d5\u06a9\u06d5 \u06a9\u06c6\u067e\u06cc \u0646\u0627\u06a9\u0627\u062a. \u0644\u06d5 \u062c\u06cc\u0627\u062a\u06cc \u0626\u06d5\u0648\u06d5\u060c \u0641\u0627\u06cc\u0644\u06d5 \u0648\u06ce\u0631\u062a\u0648\u0627\u06b5\u06d5\u06a9\u06d5\u06cc \u062f\u06cc\u0633\u06a9\u06d5\u06a9\u06d5 (\u0628\u06c6 \u0646\u0645\u0648\u0648\u0646\u06d5 <code>.vmdk<\/code> \u06cc\u0627\u0646 <code>.vhdx<\/code>) \u0644\u06d5 \u062f\u06c6\u062e\u06cc \u062a\u06d5\u0646\u0647\u0627-\u062e\u0648\u06ce\u0646\u062f\u0646\u06d5\u0648\u06d5 (read-only) \u062f\u06d5\u06cc\u0628\u06d5\u0633\u062a\u06ce\u062a \u0648 \u062f\u06cc\u0633\u06a9\u06ce\u06a9\u06cc \u0646\u0648\u06ce\u06cc \u062c\u06cc\u0627\u0648\u0627\u0632\u06cc (delta disk) \u062f\u0631\u0648\u0633\u062a \u062f\u06d5\u06a9\u0627\u062a. \u0647\u06d5\u0645\u0648\u0648 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\u0626\u0627\u0633\u0627\u06cc\u06cc\u06d5\u06a9\u0627\u0646 \u0628\u06d5 \u062a\u06d5\u0648\u0627\u0648\u06cc \u0628\u06ce \u0626\u0627\u06af\u0627\u0646 \u0644\u06d5\u0648 \u0626\u06d5\u067e\u06b5\u06cc\u06a9\u06d5\u06cc\u0634\u0646\u0627\u0646\u06d5\u06cc \u0644\u06d5 \u0646\u0627\u0648 \u0633\u06cc\u0633\u062a\u06d5\u0645\u06cc \u06a9\u0627\u0631\u067e\u06ce\u06a9\u0631\u062f\u0646\u06cc \u0645\u06cc\u0648\u0627\u0646\u062f\u0627 \u06a9\u0627\u0631\u062f\u06d5\u06a9\u06d5\u0646. \u0626\u06d5\u0648\u0627\u0646 \u062f\u06c6\u062e\u06cc \u062f\u06cc\u0633\u06a9\u06d5\u06a9\u06d5 \u0628\u06d5\u0648 \u0634\u06ce\u0648\u06d5\u06cc\u06d5 \u062f\u06d5\u06af\u0631\u0646 \u06a9\u06d5 \u0644\u06d5\u0648 \u0633\u0627\u062a\u06d5 \u0648\u0631\u062f\u06d5\u062f\u0627 \u0647\u06d5\u06cc\u06d5.<\/p>\n<h3>\u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633\u06d5 \u062a\u0631\u0627\u0646\u0633\u0627\u06a9\u0634\u0646\u0627\u06b5\u06d5\u06a9\u0627\u0646 \u0686\u06c6\u0646 \u062f\u06c6\u062e \u0628\u06d5\u0695\u06ce\u0648\u06d5\u062f\u06d5\u0628\u06d5\u0646<\/h3>\n<p>\u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633\u06d5 \u062a\u0631\u0627\u0646\u0633\u0627\u06a9\u0634\u0646\u0627\u06b5\u06d5\u06a9\u0627\u0646 \u0628\u06d5\u067e\u06ce\u06cc \u062a\u0627\u06cc\u0628\u06d5\u062a\u0645\u06d5\u0646\u062f\u06cc\u06cc\u06d5\u06a9\u0627\u0646\u06cc ACID (Atomicity, Consistency, Isolation, Durability) \u062f\u06cc\u0632\u0627\u06cc\u0646 \u06a9\u0631\u0627\u0648\u0646. \u0628\u06c6 \u0628\u06d5\u062f\u06d5\u0633\u062a\u0647\u06ce\u0646\u0627\u0646\u06cc \u06a9\u0627\u0631\u0627\u06cc\u06cc \u0628\u06d5\u0631\u0632 \u0644\u06d5 \u06a9\u0627\u062a\u06ce\u06a9\u062f\u0627 \u067e\u0627\u0628\u06d5\u0646\u062f\u0628\u0648\u0648\u0646 \u0628\u06d5 ACID \u062f\u06d5\u067e\u0627\u0631\u06ce\u0632\u0631\u06ce\u062a\u060c \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633\u06d5\u06a9\u0627\u0646 \u0647\u06d5\u0645\u0648\u0648 \u062a\u0631\u0627\u0646\u0633\u0627\u06a9\u0634\u0646\u06ce\u06a9 \u0695\u0627\u0633\u062a\u06d5\u0648\u062e\u06c6 \u0628\u06c6 \u0641\u0627\u06cc\u0644\u06d5 \u0633\u06d5\u0631\u06d5\u06a9\u06cc\u06cc\u06d5\u06a9\u0627\u0646\u06cc \u062f\u0627\u062a\u0627 \u0644\u06d5\u0633\u06d5\u0631 \u062f\u06cc\u0633\u06a9 \u0646\u0627\u0646\u0648\u0648\u0633\u0646. \u0644\u06d5 \u062c\u06cc\u0627\u062a\u06cc \u0626\u06d5\u0648\u06d5\u060c \u0626\u06d5\u0648\u0627\u0646 \u062a\u06d5\u0644\u0627\u0631\u0633\u0627\u0632\u06cc\u06cc\u06d5\u06a9\u06cc \u0626\u0627\u06b5\u06c6\u0632 \u0648 \u0641\u0631\u06d5-\u0626\u0627\u0633\u062a \u0628\u06d5\u06a9\u0627\u0631\u062f\u06d5\u0647\u06ce\u0646\u0646:<\/p>\n<ol>\n<li><strong>Buffer Pool \/ Shared Buffers:<\/strong> \u062f\u0627\u062a\u0627 \u062f\u06d5\u062e\u0648\u06ce\u0646\u0631\u06ce\u062a\u06d5\u0648\u06d5 \u0648 \u0644\u06d5 \u0646\u0627\u0648 \u0628\u06cc\u0631\u06af\u06d5\u06cc \u0633\u06cc\u0633\u062a\u06d5\u0645\u062f\u0627 \u062f\u06d5\u0633\u062a\u06a9\u0627\u0631\u06cc \u062f\u06d5\u06a9\u0631\u06ce\u062a.<\/li>\n<li><strong>Write-Ahead Log (WAL) \/ Redo Logs:<\/strong> \u06af\u06c6\u0695\u0627\u0646\u06a9\u0627\u0631\u06cc\u06cc\u06d5\u06a9\u0627\u0646 \u0628\u06d5\u062f\u0648\u0627\u06cc \u06cc\u06d5\u06a9\u062f\u0627 \u0628\u06c6 \u0641\u0627\u06cc\u0644\u06ce\u06a9\u06cc \u0644\u06c6\u06af\u06cc \u0632\u06c6\u0631 \u0626\u06c6\u067e\u062a\u06cc\u0645\u0627\u06cc\u0632\u06a9\u0631\u0627\u0648 \u0644\u06d5\u0633\u06d5\u0631 \u062f\u06cc\u0633\u06a9 \u062f\u06d5\u0646\u0648\u0648\u0633\u0631\u06ce\u0646 \u0628\u06c6 \u062f\u06b5\u0646\u06cc\u0627\u0628\u0648\u0648\u0646 \u0644\u06d5 \u0645\u0627\u0646\u06d5\u0648\u06d5\u06cc \u062f\u0627\u062a\u0627.<\/li>\n<li><strong>Checkpoints \/ Lazy Writers:<\/strong> \u0628\u06d5 \u0634\u06ce\u0648\u06d5\u06cc\u06d5\u06a9\u06cc \u062e\u0648\u0644\u06cc\u060c \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633\u06d5\u06a9\u06d5 \u0626\u06d5\u0648 \u0644\u0627\u067e\u06d5\u0695\u0627\u0646\u06d5\u06cc \u062f\u06d5\u0633\u062a\u06a9\u0627\u0631\u06cc \u06a9\u0631\u0627\u0648\u0646 (dirty pages) \u0644\u06d5 \u0628\u06cc\u0631\u06af\u06d5\u0648\u06d5 \u0628\u06c6 \u0641\u0627\u06cc\u0644\u06d5 \u0695\u0627\u0633\u062a\u06d5\u0642\u06cc\u0646\u06d5\u06a9\u0627\u0646\u06cc \u062f\u0627\u062a\u0627 \u0644\u06d5\u0633\u06d5\u0631 \u062f\u06cc\u0633\u06a9 \u062f\u06d5\u06af\u0648\u0627\u0632\u06ce\u062a\u06d5\u0648\u06d5.<\/li>\n<\/ol>\n<p>\u0628\u06d5\u0647\u06c6\u06cc \u0626\u06d5\u0645 \u062a\u06d5\u0644\u0627\u0631\u0633\u0627\u0632\u06cc\u06cc\u06d5\u0648\u06d5\u060c \u0641\u0627\u06cc\u0644\u06d5 \u0641\u06cc\u0632\u06cc\u06a9\u06cc\u06cc\u06d5\u06a9\u0627\u0646\u06cc \u062f\u0627\u062a\u0627 \u0644\u06d5\u0633\u06d5\u0631 \u062f\u06cc\u0633\u06a9 \u0646\u0632\u06cc\u06a9\u06d5\u06cc \u0647\u06d5\u0645\u06cc\u0634\u06d5 \u0644\u06d5\u06af\u06d5\u06b5 \u062f\u06c6\u062e\u06cc \u0695\u0627\u0633\u062a\u06d5\u0642\u06cc\u0646\u06d5\u06cc \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633\u06d5\u06a9\u06d5\u062f\u0627 \u0646\u0627\u06af\u0648\u0646\u062c\u06ce\u0646. \u062f\u06c6\u062e\u06cc \u0695\u0627\u0633\u062a\u06d5\u0642\u06cc\u0646\u06d5\u06cc \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633\u06d5\u06a9\u06d5 \u062a\u06d5\u0646\u0647\u0627 \u0648\u06d5\u06a9 \u062a\u06ce\u06a9\u06d5\u06b5\u06d5\u06cc\u06d5\u06a9 \u0644\u06d5 \u0641\u0627\u06cc\u0644\u06d5\u06a9\u0627\u0646\u06cc \u062f\u0627\u062a\u0627 \u0644\u06d5\u0633\u06d5\u0631 \u062f\u06cc\u0633\u06a9\u060c \u0644\u06c6\u06af\u06d5\u06a9\u0627\u0646\u06cc WAL\/Redo\u060c \u0648 \u0626\u06d5\u0648 \u062f\u0627\u062a\u0627\u06cc\u06d5\u06cc \u0626\u06ce\u0633\u062a\u0627 \u0644\u06d5 \u0628\u06cc\u0631\u06af\u06d5\u062f\u0627\u06cc\u06d5 \u0628\u0648\u0648\u0646\u06cc \u0647\u06d5\u06cc\u06d5.<\/p>\n<h2>\u0646\u0627\u0648\u0686\u06d5\u06cc \u0645\u06d5\u062a\u0631\u0633\u06cc: \u0686\u06cc \u0695\u0648\u0648\u062f\u06d5\u062f\u0627\u062a \u0644\u06d5 \u06a9\u0627\u062a\u06cc \u0648\u06ce\u0646\u06d5\u06af\u0631\u062a\u0646\u06cc VM<\/h2>\n<p>\u06a9\u0627\u062a\u06ce\u06a9 \u0648\u06ce\u0646\u06d5\u06af\u0631\u062a\u0646\u06ce\u06a9\u06cc \u0626\u0627\u0633\u0627\u06cc\u06cc VM \u0628\u06c6 \u0633\u06ce\u0631\u06a4\u06d5\u0631\u06cc \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633\u06ce\u06a9 \u0626\u06d5\u0646\u062c\u0627\u0645 \u062f\u06d5\u062f\u06d5\u06cc\u062a\u060c \u062a\u06c6 \u062f\u06c6\u062e\u06ce\u06a9\u06cc <strong>crash-consistent<\/strong> (\u06af\u0648\u0646\u062c\u0627\u0648 \u0644\u06d5\u06af\u06d5\u06b5 \u062a\u06ce\u06a9\u0686\u0648\u0648\u0646) \u062f\u06d5\u06af\u0631\u06cc\u062a.<\/p>\n<h3>Crash Consistency \u0628\u06d5\u0631\u0627\u0645\u0628\u06d5\u0631 Application Consistency<\/h3>\n<p>\u0648\u06ce\u0646\u06d5\u06af\u0631\u062a\u0646\u06cc crash-consistent \u0647\u0627\u0648\u062a\u0627\u06cc\u06d5 \u0644\u06d5\u06af\u06d5\u06b5 \u06a9\u06ce\u0634\u0627\u0646\u06cc \u06a9\u06ce\u0628\u06b5\u06cc \u06a9\u0627\u0631\u06d5\u0628\u0627\u06cc \u0633\u06ce\u0631\u06a4\u06d5\u0631\u06d5 \u0641\u06cc\u0632\u06cc\u06a9\u06cc\u06cc\u06d5\u06a9\u06d5. \u062f\u06c6\u062e\u06cc \u062f\u06cc\u0633\u06a9\u06d5\u06a9\u06d5 \u062f\u06d5\u06af\u06cc\u0631\u06ce\u062a\u060c \u0628\u06d5\u06b5\u0627\u0645 \u0647\u06d5\u0631\u0686\u06cc \u0644\u06d5 \u0628\u06cc\u0631\u06af\u06d5\u062f\u0627 \u0628\u0648\u0648\u06d5 \u0644\u06d5\u062f\u06d5\u0633\u062a \u062f\u06d5\u0686\u06ce\u062a\u060c \u0648 \u0647\u06d5\u0631\u0686\u06cc \u0644\u06d5 \u0646\u0627\u0648\u06d5\u0695\u0627\u0633\u062a\u06cc \u06af\u0648\u0627\u0633\u062a\u0646\u06d5\u0648\u06d5\u062f\u0627 \u0628\u0648\u0648\u06d5 \u0628\u06c6 \u06a9\u06c6\u0646\u062a\u0631\u06c6\u06b5\u06d5\u0631\u06cc \u06a9\u06c6\u06af\u0627\u06a9\u0631\u062f\u0646 \u0628\u06d5 \u062e\u06ce\u0631\u0627\u06cc\u06cc \u062f\u06d5\u067e\u0686\u0695\u06ce\u062a.<\/p>\n<p>\u0644\u06d5 \u06a9\u0627\u062a\u06ce\u06a9\u062f\u0627 \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633\u06d5 \u0645\u06c6\u062f\u06ce\u0631\u0646\u06d5\u06a9\u0627\u0646 \u062f\u06cc\u0632\u0627\u06cc\u0646 \u06a9\u0631\u0627\u0648\u0646 \u0628\u06c6 \u0626\u06d5\u0648\u06d5\u06cc \u0644\u06d5 \u0644\u06d5\u062f\u06d5\u0633\u062a\u062f\u0627\u0646\u06cc \u06a9\u0627\u0631\u06d5\u0628\u0627\u06cc \u0686\u0627\u0648\u06d5\u0695\u0648\u0627\u0646\u0646\u06d5\u06a9\u0631\u0627\u0648 \u0686\u0627\u06a9 \u0628\u0628\u0646\u06d5\u0648\u06d5 \u0628\u06d5 \u062f\u0648\u0648\u0628\u0627\u0631\u06d5 \u0626\u06d5\u0646\u062c\u0627\u0645\u062f\u0627\u0646\u06d5\u0648\u06d5\u06cc Write-Ahead Log\u060c \u067e\u0634\u062a \u0628\u06d5\u0633\u062a\u0646 \u0628\u06d5 \u0686\u0627\u06a9\u0628\u0648\u0648\u0646\u06d5\u0648\u06d5\u06cc \u062a\u06ce\u06a9\u0686\u0648\u0648\u0646 \u0648\u06d5\u06a9 \u0633\u062a\u0631\u0627\u062a\u06cc\u0698\u06cc \u0633\u06d5\u0631\u06d5\u06a9\u06cc \u0628\u0627\u06a9\u0626\u06d5\u067e \u0632\u06c6\u0631 \u0645\u06d5\u062a\u0631\u0633\u06cc\u062f\u0627\u0631\u06d5. \u0626\u06d5\u06af\u06d5\u0631 \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633\u06d5\u06a9\u06d5\u062a \u0686\u06d5\u0646\u062f \u062f\u06cc\u0633\u06a9\u06ce\u06a9\u06cc \u0648\u06ce\u0631\u062a\u0648\u0627\u06b5 \u0644\u06d5\u062e\u06c6 \u062f\u06d5\u06af\u0631\u06ce\u062a (\u0628\u06c6 \u0646\u0645\u0648\u0648\u0646\u06d5 \u0641\u0627\u06cc\u0644\u06d5\u06a9\u0627\u0646\u06cc \u062f\u0627\u062a\u0627 \u0644\u06d5 <code>Drive D:<\/code> \u0648 WAL \u0644\u06d5 <code>Drive E:<\/code>)\u060c \u0647\u0627\u06cc\u067e\u06d5\u0631\u06a4\u0627\u06cc\u0632\u06d5\u0631\u06d5\u06a9\u06d5 \u0695\u06d5\u0646\u06af\u06d5 \u0646\u06d5\u062a\u0648\u0627\u0646\u06ce\u062a \u0647\u06d5\u0631\u062f\u0648\u0648 \u062f\u06cc\u0633\u06a9\u06d5\u06a9\u06d5 \u0644\u06d5 \u0647\u06d5\u0645\u0627\u0646 \u0633\u0627\u062a\u062f\u0627 \u0648\u06ce\u0646\u06d5 \u0628\u06af\u0631\u06ce\u062a. \u0626\u06d5\u06af\u06d5\u0631 \u0648\u06ce\u0646\u06d5\u06cc \u062f\u06cc\u0633\u06a9\u06cc WAL \u062a\u06d5\u0646\u0627\u0646\u06d5\u062a \u0628\u06d5\u0634\u06ce\u06a9 \u0644\u06d5 \u0686\u0631\u06a9\u06d5\u06cc\u06d5\u06a9 \u062f\u0648\u0627\u06cc \u0648\u06ce\u0646\u06d5\u06cc \u062f\u06cc\u0633\u06a9\u06cc \u062f\u0627\u062a\u0627 \u0628\u06af\u06cc\u0631\u06ce\u062a\u060c \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633\u06d5\u06a9\u06d5 \u0646\u0627\u062a\u0648\u0627\u0646\u06ce\u062a \u0698\u0645\u0627\u0631\u06d5\u06cc \u0632\u0646\u062c\u06cc\u0631\u06d5\u06a9\u0627\u0646 \u0644\u06d5 \u06a9\u0627\u062a\u06cc \u06af\u06d5\u0695\u0627\u0646\u062f\u0646\u06d5\u0648\u06d5\u062f\u0627 \u0695\u06ce\u06a9\u0628\u062e\u0627\u062a\u060c \u06a9\u06d5 \u062f\u06d5\u0628\u06ce\u062a\u06d5 \u0647\u06c6\u06cc \u062a\u06ce\u06a9\u0686\u0648\u0648\u0646\u06cc \u06a9\u0648\u0634\u0646\u062f\u06d5.<\/p>\n<h3>\u06a9\u0627\u0631\u06cc\u06af\u06d5\u0631\u06cc &#8220;VM Stun&#8221; \u0644\u06d5\u0633\u06d5\u0631 \u0633\u06cc\u0633\u062a\u06d5\u0645\u06d5 \u062a\u0631\u0627\u0646\u0633\u0627\u06a9\u0634\u0646 \u0628\u06d5\u0631\u0632\u06d5\u06a9\u0627\u0646<\/h3>\n<p>\u067e\u0631\u06c6\u0633\u06d5\u06cc \u062f\u0631\u0648\u0633\u062a\u06a9\u0631\u062f\u0646\u06cc \u0648\u06ce\u0646\u06d5\u06af\u0631\u062a\u0646\u2014\u0648 \u06af\u0631\u0646\u06af\u062a\u0631 \u0644\u06d5\u0648\u06d5\u060c \u067e\u0631\u06c6\u0633\u06d5\u06cc \u06cc\u06d5\u06a9\u062e\u0633\u062a\u0646\u06cc \u0648\u06ce\u0646\u06d5\u06af\u0631\u062a\u0646\u2014\u062f\u06d5\u0628\u06ce\u062a\u06d5 \u0647\u06c6\u06cc \u062f\u06cc\u0627\u0631\u062f\u06d5\u06cc\u06d5\u06a9 \u06a9\u06d5 \u0628\u06d5 &#8220;VM Stun&#8221; \u0646\u0627\u0633\u0631\u0627\u0648\u06d5.<\/p>\n<p>\u0628\u06c6 \u0626\u06d5\u0648\u06d5\u06cc \u0628\u06d5 \u0633\u06d5\u0644\u0627\u0645\u06d5\u062a\u06cc I\/O \u0644\u06d5 \u062f\u06cc\u0633\u06a9\u06d5 \u0628\u0646\u06d5\u0695\u06d5\u062a\u06cc\u06cc\u06d5\u06a9\u06d5\u0648\u06d5 \u0628\u06c6 \u062f\u06cc\u0633\u06a9\u06d5 \u062c\u06cc\u0627\u0648\u0627\u0632\u06d5\u06a9\u06d5 \u0628\u06af\u0648\u0627\u0632\u0631\u06ce\u062a\u06d5\u0648\u06d5\u060c \u0647\u0627\u06cc\u067e\u06d5\u0631\u06a4\u0627\u06cc\u0632\u06d5\u0631\u06d5\u06a9\u06d5 \u062f\u06d5\u0628\u06ce\u062a \u0628\u06c6 \u0633\u0627\u062a\u06ce\u06a9 \u0626\u0627\u0645\u06ce\u0631\u06d5 \u0648\u06ce\u0631\u062a\u0648\u0627\u06b5\u06d5\u06a9\u06d5 \u0695\u0627\u0628\u06af\u0631\u06ce\u062a (stun). \u0628\u06c6 \u0633\u06ce\u0631\u06a4\u06d5\u0631\u06ce\u06a9\u06cc \u0648\u06ce\u0628\u06cc \u0633\u0648\u0648\u06a9\u060c \u0626\u06d5\u0645 \u0695\u0627\u06af\u0631\u062a\u0646\u06d5 \u0695\u06d5\u0646\u06af\u06d5 10-50 \u0645\u06cc\u0644\u06cc \u0686\u0631\u06a9\u06d5 \u0628\u062e\u0627\u06cc\u06d5\u0646\u06ce\u062a \u0648 \u0647\u06d5\u0633\u062a\u06cc \u067e\u06ce \u0646\u06d5\u06a9\u0631\u06ce\u062a. \u0628\u06d5\u06b5\u0627\u0645\u060c \u0628\u06c6 \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633\u06ce\u06a9\u06cc \u062e\u06ce\u0631\u0627\u06cc\u06cc \u0628\u06d5\u0631\u0632 \u06a9\u06d5 I\/O \u06cc \u0632\u06c6\u0631\u06cc \u0647\u06d5\u06cc\u06d5\u060c \u06cc\u06d5\u06a9\u062e\u0633\u062a\u0646\u06cc \u062f\u06cc\u0633\u06a9\u06ce\u06a9\u06cc \u062c\u06cc\u0627\u0648\u0627\u0632\u06cc \u06af\u06d5\u0648\u0631\u06d5 \u062f\u06d5\u062a\u0648\u0627\u0646\u06ce\u062a VM \u0628\u06c6 \u0686\u06d5\u0646\u062f \u0686\u0631\u06a9\u06d5\u06cc\u06d5\u06a9 \u0695\u0627\u0628\u06af\u0631\u06ce\u062a.<\/p>\n<p>\u0644\u06d5 \u06a9\u0627\u062a\u06cc VM stun:<br \/>\n* \u067e\u06d5\u06cc\u0648\u06d5\u0646\u062f\u06cc\u06cc\u06d5\u06a9\u0627\u0646\u06cc \u062a\u06c6\u0695 \u062f\u06d5\u067e\u0686\u0695\u06ce\u0646\u060c \u062f\u06d5\u0628\u06ce\u062a\u06d5 \u0647\u06c6\u06cc \u06a9\u0627\u062a \u0628\u06d5\u0633\u06d5\u0631\u0686\u0648\u0648\u0646\u06cc (timeout) \u0626\u06d5\u067e\u06b5\u06cc\u06a9\u06d5\u06cc\u0634\u0646.<br \/>\n* \u06a9\u06b5\u0627\u0633\u062a\u06d5\u0631\u06d5 \u0628\u06d5\u0631\u0632-\u0628\u06d5\u0631\u062f\u06d5\u0633\u062a\u06d5\u06a9\u0627\u0646 (\u0648\u06d5\u06a9 SQL Server Always On\u060c PostgreSQL Patroni\u060c \u06cc\u0627\u0646 MySQL Galera) \u067e\u0634\u06a9\u0646\u06cc\u0646\u06cc \u062f\u06b5 (heartbeat) \u0644\u06d5\u062f\u06d5\u0633\u062a \u062f\u06d5\u062f\u06d5\u0646.<br \/>\n* \u06a9\u06b5\u0627\u0633\u062a\u06d5\u0631\u06d5\u06a9\u06d5 \u0695\u06d5\u0646\u06af\u06d5 \u0648\u0627 \u0628\u06cc\u0631 \u0628\u06a9\u0627\u062a\u06d5\u0648\u06d5 \u06a9\u06d5 \u0646\u06c6\u062f\u06d5\u06a9\u06d5 \u0645\u0631\u062f\u0648\u0648\u06d5\u060c \u0648 \u062f\u06d5\u0628\u06ce\u062a\u06d5 \u0647\u06c6\u06cc \u0626\u06d5\u0646\u062c\u0627\u0645\u062f\u0627\u0646\u06cc failover\u06ce\u06a9\u06cc \u0646\u0627\u067e\u06ce\u0648\u06cc\u0633\u062a \u0648 \u062a\u06ce\u06a9\u062f\u06d5\u0631 (\u062f\u06c6\u062e\u06cc split-brain).<\/p>\n<h3>\u0644\u0627\u067e\u06d5\u0695\u06d5\u06cc \u062f\u0695\u0627\u0648 (Torn Pages) \u0648 \u0646\u0627\u06af\u0648\u0646\u062c\u0627\u0646\u06cc I\/O<\/h3>\n<p>\u0628\u0632\u0648\u06ce\u0646\u06d5\u0631\u06cc \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633\u06d5\u06a9\u0627\u0646 \u0628\u06d5 \u0634\u06ce\u0648\u06d5\u06cc\u06d5\u06a9\u06cc \u06af\u0634\u062a\u06cc \u062f\u0627\u062a\u0627 \u0628\u06d5 \u0642\u06d5\u0628\u0627\u0631\u06d5\u06cc \u0644\u0627\u067e\u06d5\u0695\u06d5\u06cc \u062f\u06cc\u0627\u0631\u06cc\u06a9\u0631\u0627\u0648 \u062f\u06d5\u0646\u0648\u0648\u0633\u0646 (\u0628\u06c6 \u0646\u0645\u0648\u0648\u0646\u06d5 8KB \u0628\u06c6 PostgreSQL \u0648 SQL Server\u060c 16KB \u0628\u06c6 InnoDB). \u0628\u06d5\u06b5\u0627\u0645\u060c \u0633\u06cc\u0633\u062a\u06d5\u0645\u06cc \u06a9\u0627\u0631\u067e\u06ce\u06a9\u0631\u062f\u0646 \u0648 \u06a9\u06c6\u06af\u0627\u06a9\u0627\u0646\u06cc \u0628\u0646\u06d5\u0695\u06d5\u062a\u06cc I\/O \u0628\u06d5 \u0628\u0644\u06c6\u06a9\u06cc \u0628\u0686\u0648\u0648\u06a9\u062a\u0631 (\u0628\u06c6 \u0646\u0645\u0648\u0648\u0646\u06d5 4KB \u06cc\u0627\u0646 512 \u0628\u0627\u06cc\u062a) \u0626\u06d5\u0646\u062c\u0627\u0645 \u062f\u06d5\u062f\u06d5\u0646.<\/p>\n<p>\u0626\u06d5\u06af\u06d5\u0631 \u0647\u0627\u06cc\u067e\u06d5\u0631\u06a4\u0627\u06cc\u0632\u06d5\u0631\u06ce\u06a9 \u0648\u06ce\u0646\u06d5\u06af\u0631\u062a\u0646\u06ce\u06a9 \u0626\u06d5\u0646\u062c\u0627\u0645 \u0628\u062f\u0627\u062a \u0644\u06d5\u0648 \u0633\u0627\u062a\u06d5\u062f\u0627 \u06a9\u06d5 \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633\u06d5\u06a9\u06d5 \u0644\u0627\u067e\u06d5\u0695\u06d5\u06cc\u06d5\u06a9\u06cc 8KB \u062f\u06d5\u0646\u0648\u0648\u0633\u06ce\u062a\u060c \u0648\u06ce\u0646\u06d5\u06af\u0631\u062a\u0646\u06d5\u06a9\u06d5 \u0695\u06d5\u0646\u06af\u06d5 4KB \u06cc \u06cc\u06d5\u06a9\u06d5\u0645\u06cc \u062f\u0627\u062a\u0627 \u0646\u0648\u06ce\u06cc\u06d5\u06a9\u06d5 \u0648 4KB \u06cc \u06a9\u06c6\u062a\u0627\u06cc\u06cc \u062f\u0627\u062a\u0627 \u06a9\u06c6\u0646\u06d5\u06a9\u06d5 \u0628\u06af\u0631\u06ce\u062a. \u0626\u06d5\u0645\u06d5 <strong>\u0644\u0627\u067e\u06d5\u0695\u06d5\u06cc\u06d5\u06a9\u06cc \u062f\u0695\u0627\u0648<\/strong> \u062f\u0631\u0648\u0633\u062a \u062f\u06d5\u06a9\u0627\u062a. \u06a9\u0627\u062a\u06ce\u06a9 \u0647\u06d5\u0648\u06b5 \u062f\u06d5\u062f\u06d5\u06cc\u062a \u0648\u06ce\u0646\u06d5\u06af\u0631\u062a\u0646\u06d5\u06a9\u06d5 \u0628\u06af\u06d5\u0695\u06ce\u0646\u06cc\u062a\u06d5\u0648\u06d5\u060c \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633\u06d5\u06a9\u06d5 \u0644\u0627\u067e\u06d5\u0695\u06d5\u06a9\u06d5 \u062f\u06d5\u062e\u0648\u06ce\u0646\u06ce\u062a\u06d5\u0648\u06d5\u060c \u067e\u0634\u06a9\u0646\u06cc\u0646\u06cc checksum \u0634\u06a9\u0633\u062a \u062f\u06d5\u0647\u06ce\u0646\u06ce\u062a\u060c \u0648 \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633\u06d5\u06a9\u06d5 \u0648\u06d5\u06a9 \u062a\u06ce\u06a9\u0686\u0648\u0648 \u0646\u06cc\u0634\u0627\u0646 \u062f\u06d5\u06a9\u0627\u062a.<\/p>\n<h2>\u062f\u06d5\u0631\u0626\u06d5\u0646\u062c\u0627\u0645\u06d5 \u0695\u0627\u0633\u062a\u06d5\u0642\u06cc\u0646\u06d5\u06a9\u0627\u0646 \u0628\u06c6 \u0628\u0632\u0648\u06ce\u0646\u06d5\u0631\u06cc \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633\u06d5 \u062f\u06cc\u0627\u0631\u06cc\u06a9\u0631\u0627\u0648\u06d5\u06a9\u0627\u0646<\/h2>\n<p>\u0628\u0632\u0648\u06ce\u0646\u06d5\u0631\u06cc \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633\u06d5 \u062c\u06cc\u0627\u0648\u0627\u0632\u06d5\u06a9\u0627\u0646 \u0628\u06d5 \u0634\u06ce\u0648\u06d5\u06cc \u062c\u06cc\u0627\u0648\u0627\u0632 \u06a9\u0627\u0631\u062f\u0627\u0646\u06d5\u0648\u06d5\u06cc\u0627\u0646 \u0628\u06c6 \u0648\u06ce\u0646\u06d5\u06af\u0631\u062a\u0646\u06cc crash-consistent \u062f\u06d5\u0628\u06ce\u062a\u060c \u0628\u06d5\u06b5\u0627\u0645 \u0647\u06cc\u0686 \u06a9\u0627\u0645\u06cc\u0627\u0646 \u0628\u06d5 \u0634\u06ce\u0648\u06d5\u06cc\u06d5\u06a9\u06cc \u0628\u0627\u0634 \u0644\u06d5 \u0698\u06cc\u0646\u06af\u06d5\u06cc \u0628\u06d5\u0631\u0647\u06d5\u0645\u0647\u06ce\u0646\u0627\u0646\u062f\u0627 \u0645\u0627\u0645\u06d5\u06b5\u06d5\u06cc \u0644\u06d5\u06af\u06d5\u06b5 \u0646\u0627\u06a9\u06d5\u0646.<\/p>\n<ul>\n<li><strong>PostgreSQL:<\/strong> PostgreSQL \u0628\u06d5 \u0634\u06ce\u0648\u06d5\u06cc\u06d5\u06a9\u06cc \u0632\u06c6\u0631 \u067e\u0634\u062a \u0628\u06d5 \u0628\u0648\u062e\u0686\u06d5\u06cc <code>pg_wal<\/code> \u062f\u06d5\u0628\u06d5\u0633\u062a\u06ce\u062a. \u0626\u06d5\u06af\u06d5\u0631 \u0648\u06ce\u0646\u06d5\u06af\u0631\u062a\u0646\u06ce\u06a9 \u0628\u0648\u062e\u0686\u06d5\u06cc \u062f\u0627\u062a\u0627 (<code>$PGDATA<\/code>) \u0648 WAL \u0628\u06d5 \u0646\u0627\u06af\u0648\u0646\u062c\u0627\u0648\u06cc \u0628\u06af\u0631\u06ce\u062a\u060c PostgreSQL \u0634\u06a9\u0633\u062a \u062f\u06d5\u0647\u06ce\u0646\u06ce\u062a \u0644\u06d5 \u06a9\u0627\u0631\u06a9\u0631\u062f\u0646\u060c \u0648 \u0647\u06d5\u06b5\u06d5\u06cc <code>PANIC: could not locate a valid checkpoint record<\/code> \u062f\u06d5\u0631\u062f\u06d5\u06a9\u0627\u062a.<\/li>\n<li><strong>MySQL\/InnoDB:<\/strong> InnoDB \u0628\u0648\u0641\u0631\u06ce\u06a9\u06cc \u062f\u0648\u0648\u0628\u0627\u0631\u06d5-\u0646\u0648\u0648\u0633\u06cc\u0646 (doublewrite buffer) \u0628\u06d5\u06a9\u0627\u0631\u062f\u06d5\u0647\u06ce\u0646\u06ce\u062a \u0628\u06c6 \u0695\u06ce\u06af\u0631\u06cc\u06a9\u0631\u062f\u0646 \u0644\u06d5 \u0644\u0627\u067e\u06d5\u0695\u06d5\u06cc \u062f\u0695\u0627\u0648\u060c \u06a9\u06d5 \u0647\u06d5\u0646\u062f\u06ce\u06a9 \u067e\u0627\u0631\u0627\u0633\u062a\u0646 \u062f\u0698\u06cc \u062f\u06c6\u062e\u06cc crash-consistent \u062f\u0627\u0628\u06cc\u0646 \u062f\u06d5\u06a9\u0627\u062a. \u0628\u06d5\u06b5\u0627\u0645\u060c \u0626\u06d5\u06af\u06d5\u0631 \u0641\u0627\u06cc\u0644\u06cc <code>ibdata1<\/code> \u0648 <code>ib_logfile<\/code> \u0628\u06d5 \u0646\u0627\u06af\u0648\u0646\u062c\u0627\u0648\u06cc \u0628\u06af\u06cc\u0631\u06ce\u0646\u060c \u0628\u0632\u0648\u06ce\u0646\u06d5\u0631\u06cc InnoDB \u0644\u06d5 \u06a9\u0627\u062a\u06cc \u0686\u0627\u06a9\u0628\u0648\u0648\u0646\u06d5\u0648\u06d5\u062f\u0627 \u062a\u06ce\u06a9\u062f\u06d5\u0686\u06ce\u062a.<\/li>\n<li><strong>Microsoft SQL Server:<\/strong> SQL Server \u0632\u06c6\u0631 \u0647\u06d5\u0633\u062a\u06cc\u0627\u0631\u06d5 \u0628\u06d5\u0631\u0627\u0645\u0628\u06d5\u0631 \u0628\u06d5 \u0628\u06d5\u0633\u062a\u0646\u06cc I\/O. \u0628\u06d5\u0628\u06ce \u06cc\u06d5\u06a9\u062e\u0633\u062a\u0646\u06cc \u062f\u0631\u0648\u0633\u062a\u06cc VSS (Volume Shadow Copy Service)\u060c \u06af\u06d5\u0695\u0627\u0646\u062f\u0646\u06d5\u0648\u06d5\u06cc SQL Server \u0644\u06d5 \u0648\u06ce\u0646\u06d5\u06af\u0631\u062a\u0646\u06cc \u0626\u0627\u0633\u0627\u06cc\u06cc VM \u0632\u06c6\u0631\u062c\u0627\u0631 \u062f\u06d5\u0628\u06ce\u062a\u06d5 \u0647\u06c6\u06cc \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633\u06cc \u06af\u0648\u0645\u0627\u0646\u0627\u0648\u06cc \u0648 \u0632\u0646\u062c\u06cc\u0631\u06d5 \u0644\u06c6\u06af\u06cc \u0634\u06a9\u0627\u0648\u060c \u06a9\u06d5 \u062a\u0648\u0627\u0646\u0627\u06a9\u0627\u0646\u06cc \u06af\u06d5\u0695\u0627\u0646\u062f\u0646\u06d5\u0648\u06d5\u06cc \u06a9\u0627\u062a\u06cc (PITR) \u0644\u06d5\u0646\u0627\u0648\u062f\u06d5\u0628\u0627\u062a.<\/li>\n<\/ul>\n<h2>\u0628\u0627\u0634\u062a\u0631\u06cc\u0646 \u0695\u06ce\u06a9\u0627\u0631\u06d5\u06a9\u0627\u0646 \u0628\u06c6 \u0628\u0627\u06a9\u0626\u06d5\u067e\u06a9\u0631\u062f\u0646\u06cc \u0633\u06d5\u0644\u0627\u0645\u06d5\u062a\u06cc \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633\u06d5 \u0648\u06ce\u0631\u062a\u0648\u0627\u06b5\u06a9\u0631\u0627\u0648\u06d5\u06a9\u0627\u0646<\/h2>\n<p>\u0628\u06c6 \u067e\u0627\u0631\u0627\u0633\u062a\u0646\u06cc \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633\u06d5 \u062a\u0631\u0627\u0646\u0633\u0627\u06a9\u0634\u0646\u0627\u06b5\u06d5\u06a9\u0627\u0646\u060c \u062f\u06d5\u0628\u06ce\u062a \u0644\u06d5 \u0628\u0627\u06a9\u0626\u06d5\u067e\u06cc crash-consistent \u0628\u06d5\u0631\u06d5\u0648 \u0628\u0627\u06a9\u0626\u06d5\u067e\u06cc <strong>application-consistent<\/strong> (\u06af\u0648\u0646\u062c\u0627\u0648 \u0644\u06d5\u06af\u06d5\u06b5 \u0626\u06d5\u067e\u06b5\u06cc\u06a9\u06d5\u06cc\u0634\u0646) \u0647\u06d5\u0646\u06af\u0627\u0648 \u0628\u0646\u06ce\u06cc\u062a. \u0626\u06d5\u0645\u06d5 \u067e\u06ce\u0648\u06cc\u0633\u062a\u06cc \u0628\u06d5\u0648\u06d5\u06cc\u06d5 \u0645\u06cc\u06a9\u0627\u0646\u06cc\u0632\u0645\u06cc \u0628\u0627\u06a9\u0626\u06d5\u067e\u06d5\u06a9\u06d5 \u067e\u06d5\u06cc\u0648\u06d5\u0646\u062f\u06cc \u0644\u06d5\u06af\u06d5\u06b5 \u0628\u0632\u0648\u06ce\u0646\u06d5\u0631\u06cc \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633\u06d5\u06a9\u06d5\u062f\u0627 \u0628\u06a9\u0627\u062a\u060c \u0648 \u0646\u0627\u0686\u0627\u0631\u06cc \u0628\u06a9\u0627\u062a \u0628\u06cc\u0631\u06af\u06d5 \u0628\u06c6 \u062f\u06cc\u0633\u06a9 \u0628\u06d5\u062a\u0627\u06b5 \u0628\u06a9\u0627\u062a \u0648 \u0626\u06c6\u067e\u06d5\u0631\u0627\u0633\u06cc\u06c6\u0646\u06d5\u06a9\u0627\u0646\u06cc I\/O \u0628\u06c6 \u0633\u0627\u062a\u06ce\u06a9 \u0695\u0627\u0628\u06af\u0631\u06ce\u062a \u0644\u06d5 \u06a9\u0627\u062a\u06ce\u06a9\u062f\u0627 \u0648\u06ce\u0646\u06d5\u06af\u0631\u062a\u0646\u06d5\u06a9\u06d5 \u0626\u06d5\u0646\u062c\u0627\u0645 \u062f\u06d5\u062f\u0631\u06ce\u062a.<\/p>\n<h3>1. \u0633\u0648\u0648\u062f\u0648\u06d5\u0631\u06af\u0631\u062a\u0646 \u0644\u06d5 Application-Aware Quiescing (VSS \u0648 fsfreeze)<\/h3>\n<p><strong>\u0628\u06c6 \u0648\u06cc\u0646\u062f\u06c6\u0632 (SQL Server):<\/strong><br \/>\n\u0647\u06d5\u0645\u06cc\u0634\u06d5 \u062f\u06b5\u0646\u06cc\u0627\u0628\u06d5 \u06a9\u06d5 \u0686\u0627\u0631\u06d5\u0633\u06d5\u0631\u06cc \u0628\u0627\u06a9\u0626\u06d5\u067e\u06d5\u06a9\u06d5\u062a \u062e\u0632\u0645\u06d5\u062a\u06af\u0648\u0632\u0627\u0631\u06cc Microsoft Volume Shadow Copy Service (VSS) \u0628\u06d5\u06a9\u0627\u0631\u062f\u06d5\u0647\u06ce\u0646\u06ce\u062a. \u06a9\u0627\u062a\u06ce\u06a9 \u0628\u0627\u06a9\u0626\u06d5\u067e\u06ce\u06a9\u06cc VSS-aware \u062f\u06d5\u0633\u062a \u067e\u06ce \u062f\u06d5\u06a9\u0627\u062a\u060c SQL Server VSS Writer \u0626\u06c6\u067e\u06d5\u0631\u0627\u0633\u06cc\u06c6\u0646\u06d5\u06a9\u0627\u0646\u06cc I\/O \u06cc \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633\u06d5\u06a9\u06d5 \u062f\u06d5\u0628\u06d5\u0633\u062a\u06ce\u062a\u060c \u062a\u0631\u0627\u0646\u0633\u0627\u06a9\u0634\u0646\u06d5 \u0686\u0627\u0648\u06d5\u0695\u0648\u0627\u0646\u06a9\u0631\u0627\u0648\u06d5\u06a9\u0627\u0646 \u0628\u06c6 \u062f\u06cc\u0633\u06a9 \u062f\u06d5\u06af\u0648\u0627\u0632\u06ce\u062a\u06d5\u0648\u06d5\u060c \u0648 \u062f\u06b5\u0646\u06cc\u0627\u06cc\u06cc \u062f\u06d5\u062f\u0627\u062a \u06a9\u06d5 \u0648\u06ce\u0646\u06d5\u06af\u0631\u062a\u0646\u06d5\u06a9\u06d5 \u0628\u06d5 \u062a\u06d5\u0648\u0627\u0648\u06cc \u0644\u06d5\u06af\u06d5\u06b5 \u0626\u06d5\u067e\u06b5\u06cc\u06a9\u06d5\u06cc\u0634\u0646\u06d5\u06a9\u06d5\u062f\u0627 \u06af\u0648\u0646\u062c\u0627\u0648\u06d5.<\/p>\n<p><strong>\u0628\u06c6 \u0644\u06cc\u0646\u0648\u06a9\u0633 (PostgreSQL \/ MySQL):<\/strong><br \/>\n\u0644\u06cc\u0646\u0648\u06a9\u0633 \u0647\u0627\u0648\u062a\u0627\u06cc\u06d5\u06a9\u06cc \u0695\u06d5\u0633\u06d5\u0646\u06cc VSS \u0646\u06cc\u06cc\u06d5. \u0628\u06c6 \u0628\u06d5\u062f\u06d5\u0633\u062a\u0647\u06ce\u0646\u0627\u0646\u06cc \u06af\u0648\u0646\u062c\u0627\u0646\u06cc \u0626\u06d5\u067e\u06b5\u06cc\u06a9\u06d5\u06cc\u0634\u0646\u060c \u062f\u06d5\u0628\u06ce\u062a \u0633\u06a9\u0631\u06cc\u067e\u062a\u06d5\u06a9\u0627\u0646\u06cc pre-freeze \u0648 post-thaw \u0644\u06d5\u06af\u06d5\u06b5 \u0626\u0627\u0645\u0631\u0627\u0632\u06d5\u06a9\u0627\u0646\u06cc \u0645\u06cc\u0648\u0627\u0646\u06cc \u0647\u0627\u06cc\u067e\u06d5\u0631\u06a4\u0627\u06cc\u0632\u06d5\u0631\u06d5\u06a9\u06d5 (\u0648\u06d5\u06a9 VMware Tools) \u0628\u06d5\u06a9\u0627\u0631\u0628\u0647\u06ce\u0646\u06cc\u062a.<\/p>\n<p>\u0626\u06d5\u0645\u06d5 \u0646\u0645\u0648\u0648\u0646\u06d5\u06cc\u06d5\u06a9\u06cc VMware <code>pre-freeze-script<\/code> \u0628\u06c6 PostgreSQL 15+ \u06a9\u06d5 \u0628\u06d5 \u0633\u06d5\u0644\u0627\u0645\u06d5\u062a\u06cc \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633\u06d5\u06a9\u06d5 \u0628\u06c6 \u0648\u06ce\u0646\u06d5\u06af\u0631\u062a\u0646 \u0626\u0627\u0645\u0627\u062f\u06d5 \u062f\u06d5\u06a9\u0627\u062a:<\/p>\n<pre><code class=\"language-bash\">#!\/bin\/bash\n# \/usr\/sbin\/pre-freeze-script\n# \u062f\u06b5\u0646\u06cc\u0627\u0628\u06d5 \u0626\u06d5\u0645 \u0633\u06a9\u0631\u06cc\u067e\u062a\u06d5 \u062f\u06d5\u062a\u0648\u0627\u0646\u0631\u06ce\u062a \u062c\u06ce\u0628\u06d5\u062c\u06ce \u0628\u06a9\u0631\u06ce\u062a (chmod +x)\n\n# 1. \u0628\u06d5 PostgreSQL \u0628\u06b5\u06ce \u0628\u06c6 \u0628\u0627\u06a9\u0626\u06d5\u067e \u0626\u0627\u0645\u0627\u062f\u06d5 \u0628\u06ce\u062a\nsu - postgres -c \"psql -c \"SELECT pg_backup_start('vm_snapshot', true);\"\"\n\n# 2. \u0628\u0648\u0641\u0631\u06d5\u06a9\u0627\u0646\u06cc \u0633\u06cc\u0633\u062a\u06d5\u0645\u06cc \u0641\u0627\u06cc\u0644 \u0628\u06c6 \u062f\u06cc\u0633\u06a9 \u0628\u06d5\u062a\u0627\u06b5 \u0628\u06a9\u06d5\nsync\n\n# 3. \u0633\u06cc\u0633\u062a\u06d5\u0645\u06cc \u0641\u0627\u06cc\u0644\u06d5\u06a9\u06d5 \u0628\u0628\u06d5\u0633\u062a\u06d5 (\u0628\u06d5 \u06af\u0631\u06cc\u0645\u0627\u0646\u06d5\u06cc \u0626\u06d5\u0648\u06d5\u06cc \u062f\u0627\u062a\u0627 \u0644\u06d5 \/var\/lib\/pgsql \u062f\u0627\u06cc\u06d5)\nfsfreeze -f \/var\/lib\/pgsql\n<\/code><\/pre>\n<p>\u0648 <code>post-thaw-script<\/code> \u06cc \u0647\u0627\u0648\u062a\u0627\u06cc \u0628\u06c6 \u062f\u06d5\u0633\u062a\u067e\u06ce\u06a9\u0631\u062f\u0646\u06d5\u0648\u06d5\u06cc \u0626\u06c6\u067e\u06d5\u0631\u0627\u0633\u06cc\u06c6\u0646\u06d5\u06a9\u0627\u0646:<\/p>\n<pre><code class=\"language-bash\">#!\/bin\/bash\n# \/usr\/sbin\/post-thaw-script\n\n# 1. \u0633\u06cc\u0633\u062a\u06d5\u0645\u06cc \u0641\u0627\u06cc\u0644\u06d5\u06a9\u06d5 \u0628\u06a9\u06d5\u0631\u06d5\u0648\u06d5\nfsfreeze -u \/var\/lib\/pgsql\n\n# 2. \u0628\u06d5 PostgreSQL \u0628\u06b5\u06ce \u0628\u0627\u06a9\u0626\u06d5\u067e\u06d5\u06a9\u06d5 \u062a\u06d5\u0648\u0627\u0648 \u0628\u0648\u0648\nsu - postgres -c \"psql -c \"SELECT pg_backup_stop();\"\"\n<\/code><\/pre>\n<h3>2. \u0628\u06d5\u06a9\u0627\u0631\u0647\u06ce\u0646\u0627\u0646\u06cc \u0626\u0627\u0645\u0631\u0627\u0632\u06d5\u06a9\u0627\u0646\u06cc \u0628\u0627\u06a9\u0626\u06d5\u067e\u06cc \u0695\u06d5\u0633\u06d5\u0646\u06cc \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633<\/h3>\n<p>\u0644\u06d5 \u06a9\u0627\u062a\u06ce\u06a9\u062f\u0627 \u0648\u06ce\u0646\u06d5\u06af\u0631\u062a\u0646\u06cc application-consistent \u0644\u06d5 \u0648\u06ce\u0646\u06d5\u06af\u0631\u062a\u0646\u06cc \u0626\u0627\u0633\u0627\u06cc\u06cc \u0628\u0627\u0634\u062a\u0631\u06d5\u060c \u0647\u06ce\u0634\u062a\u0627 \u0645\u06d5\u062a\u0631\u0633\u06cc VM stun \u06cc\u0627\u0646 \u0647\u06d5\u06cc\u06d5. \u0633\u06d5\u0644\u0627\u0645\u06d5\u062a\u062a\u0631\u06cc\u0646 \u0695\u06ce\u06af\u0627 \u0628\u06c6 \u0628\u0627\u06a9\u0626\u06d5\u067e\u06cc \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633 \u0628\u06d5\u06a9\u0627\u0631\u0647\u06ce\u0646\u0627\u0646\u06cc \u0626\u0627\u0645\u0631\u0627\u0632\u06d5\u06a9\u0627\u0646\u06cc \u0628\u0627\u06a9\u0626\u06d5\u067e\u06cc \u0695\u06d5\u0633\u06d5\u0646 \u0648 \u0633\u062a\u0631\u06cc\u0645\u06cc\u0646\u06af\u06d5 \u06a9\u06d5 \u0628\u06d5 \u0633\u06d5\u0631\u0628\u06d5\u062e\u06c6\u06cc\u06cc \u0644\u06d5 \u0647\u0627\u06cc\u067e\u06d5\u0631\u06a4\u0627\u06cc\u0632\u06d5\u0631\u06d5\u06a9\u06d5 \u06a9\u0627\u0631\u062f\u06d5\u06a9\u06d5\u0646.<\/p>\n<p><strong>PostgreSQL (pg_basebackup):<\/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):<\/strong><br \/>\n\u0626\u06d5\u0645 \u0626\u0627\u0645\u0631\u0627\u0632\u0627\u0646\u06d5 \u0628\u0627\u06a9\u0626\u06d5\u067e\u06cc \u06af\u06d5\u0631\u0645 \u0648 \u0628\u06ce-\u0695\u0627\u06af\u0631\u062a\u0646 \u0626\u06d5\u0646\u062c\u0627\u0645 \u062f\u06d5\u062f\u06d5\u0646 \u0628\u06d5 \u06a9\u06c6\u067e\u06cc\u06a9\u0631\u062f\u0646\u06cc \u0641\u0627\u06cc\u0644\u06d5\u06a9\u0627\u0646\u06cc \u062f\u0627\u062a\u0627 \u0648 \u0644\u06d5 \u0647\u06d5\u0645\u0627\u0646 \u06a9\u0627\u062a\u062f\u0627 \u0686\u0627\u0648\u062f\u06ce\u0631\u06cc\u06a9\u0631\u062f\u0646\u06cc \u06af\u06c6\u0695\u0627\u0646\u06a9\u0627\u0631\u06cc\u06cc\u06d5\u06a9\u0627\u0646 \u0644\u06d5 redo log.<\/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):<\/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. \u062c\u06ce\u0628\u06d5\u062c\u06ce\u06a9\u0631\u062f\u0646\u06cc \u06af\u06d5\u0695\u0627\u0646\u062f\u0646\u06d5\u0648\u06d5\u06cc \u06a9\u0627\u062a\u06cc (PITR) \u0644\u06d5 \u0695\u06ce\u06af\u06d5\u06cc \u0626\u06d5\u0631\u0634\u06cc\u0641\u06a9\u0631\u062f\u0646\u06cc \u0644\u06c6\u06af<\/h3>\n<p>\u0648\u06ce\u0646\u06d5\u06af\u0631\u062a\u0646\u06ce\u06a9\u06cc \u0695\u06c6\u0698\u0627\u0646\u06d5 \u06cc\u0627\u0646 \u0628\u0627\u06a9\u0626\u06d5\u067e\u06ce\u06a9\u06cc \u062a\u06d5\u0648\u0627\u0648 \u062a\u06d5\u0646\u0647\u0627 \u062a\u0627 \u0626\u06d5\u0648 \u0633\u0627\u062a\u06d5\u06cc \u06af\u06cc\u0631\u0627\u0648\u06d5 \u062f\u06d5\u062a\u067e\u0627\u0631\u06ce\u0632\u06ce\u062a. \u0626\u06d5\u06af\u06d5\u0631 \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633\u06d5\u06a9\u06d5\u062a \u06a9\u0627\u062a\u0698\u0645\u06ce\u0631 4:00 \u06cc \u067e\u0627\u0634\u0646\u06cc\u0648\u06d5\u0695\u06c6 \u062a\u06ce\u06a9\u0628\u0686\u06ce\u062a \u0648 \u062f\u0648\u0627\u06cc\u06cc\u0646 \u0648\u06ce\u0646\u06d5\u06af\u0631\u062a\u0646\u062a \u06a9\u0627\u062a\u0698\u0645\u06ce\u0631 2:00 \u06cc \u0628\u06d5\u06cc\u0627\u0646\u06cc \u0628\u0648\u0648\u0628\u06ce\u062a\u060c 14 \u06a9\u0627\u062a\u0698\u0645\u06ce\u0631 \u0644\u06d5 \u062f\u0627\u062a\u0627\u06cc \u062a\u0631\u0627\u0646\u0633\u0627\u06a9\u0634\u0646 \u0644\u06d5\u062f\u06d5\u0633\u062a \u062f\u06d5\u062f\u06d5\u06cc\u062a.<\/p>\n<p>\u0628\u06c6 \u0628\u06d5\u062f\u06d5\u0633\u062a\u0647\u06ce\u0646\u0627\u0646\u06cc \u062e\u06c6\u0695\u0627\u06af\u0631\u06cc \u0695\u0627\u0633\u062a\u06d5\u0642\u06cc\u0646\u06d5\u06cc \u06a9\u06c6\u0645\u067e\u0627\u0646\u06cc\u0627\u06a9\u0627\u0646\u060c \u062f\u06d5\u0628\u06ce\u062a \u0628\u0627\u06a9\u0626\u06d5\u067e\u06cc \u062a\u06d5\u0648\u0627\u0648\u06cc application-consistent \u0644\u06d5\u06af\u06d5\u06b5 \u0626\u06d5\u0631\u0634\u06cc\u0641\u06a9\u0631\u062f\u0646\u06cc \u0628\u06d5\u0631\u062f\u06d5\u0648\u0627\u0645\u06cc \u0644\u06c6\u06af (\u0628\u0627\u06a9\u0626\u06d5\u067e\u06a9\u0631\u062f\u0646\u06cc WAL\u060c Redo Logs\u060c \u06cc\u0627\u0646 Transaction Logs \u0647\u06d5\u0645\u0648\u0648 \u0686\u06d5\u0646\u062f \u062e\u0648\u0644\u06d5\u06a9\u06ce\u06a9) \u062a\u06ce\u06a9\u06d5\u06b5 \u0628\u06a9\u06d5\u06cc\u062a. \u0626\u06d5\u0645\u06d5 \u0695\u06ce\u06af\u06d5 \u0628\u06d5 \u0628\u06d5\u0695\u06ce\u0648\u06d5\u0628\u06d5\u0631\u0627\u0646\u06cc \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633 \u062f\u06d5\u062f\u0627\u062a \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633\u06d5\u06a9\u06d5 \u0628\u06c6 \u062e\u0648\u0644\u06d5\u06a9\u06ce\u06a9\u06cc \u062f\u06cc\u0627\u0631\u06cc\u06a9\u0631\u0627\u0648 \u06cc\u0627\u0646 \u062a\u06d5\u0646\u0627\u0646\u06d5\u062a ID \u06cc \u062a\u0631\u0627\u0646\u0633\u0627\u06a9\u0634\u0646\u06ce\u06a9\u06cc \u062f\u06cc\u0627\u0631\u06cc\u06a9\u0631\u0627\u0648 \u067e\u06ce\u0634 \u06a9\u0627\u0631\u06d5\u0633\u0627\u062a\u06d5\u06a9\u06d5 \u0628\u06af\u06d5\u0695\u06ce\u0646\u0646\u06d5\u0648\u06d5.<\/p>\n<h2>\u0633\u062a\u0631\u0627\u062a\u06cc\u0698\u06cc\u06cc\u06d5\u06a9\u0627\u0646\u06cc \u0628\u0627\u06a9\u0626\u06d5\u067e\u06cc \u06a9\u06c6\u0645\u067e\u0627\u0646\u06cc\u0627\u06a9\u0627\u0646 \u0644\u06d5\u06af\u06d5\u06b5 CloudSave<\/h2>\n<p>\u0628\u06d5\u0695\u06ce\u0648\u06d5\u0628\u0631\u062f\u0646\u06cc \u0633\u06a9\u0631\u06cc\u067e\u062a\u06cc custom pre-freeze\u060c \u06a9\u0631\u06c6\u0646 \u062c\u06c6\u0628 \u0628\u06c6 \u062f\u06d5\u0645\u067e\u06d5 \u0695\u06d5\u0633\u06d5\u0646\u06d5\u06a9\u0627\u0646\u060c \u0648 \u0646\u0627\u0631\u062f\u0646\u06cc \u0644\u06c6\u06af \u0644\u06d5\u0633\u06d5\u0631 \u062f\u06d5\u06cc\u0627\u0646 \u0633\u06ce\u0631\u06a4\u06d5\u0631\u06cc \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633 \u0628\u06c6 \u062a\u06cc\u0645\u06d5\u06a9\u0627\u0646\u06cc DevOps \u062e\u06d5\u0648\u0646\u06ce\u06a9\u06cc \u0646\u0627\u062e\u06c6\u0634\u06d5. \u0644\u06ce\u0631\u06d5\u062f\u0627\u06cc\u06d5 \u06a9\u06d5 \u067e\u0644\u0627\u062a\u0641\u06c6\u0631\u0645\u06ce\u06a9\u06cc \u0626\u0627\u0633\u062a\u06cc \u06a9\u06c6\u0645\u067e\u0627\u0646\u06cc\u0627\u06a9\u0627\u0646 \u0648\u06d5\u06a9 CloudSave \u062f\u06d5\u0628\u06ce\u062a\u06d5 \u0634\u062a\u06ce\u06a9\u06cc \u06af\u0631\u0646\u06af.<\/p>\n<p>CloudSave \u0628\u06c6\u0634\u0627\u06cc\u06cc \u0646\u06ce\u0648\u0627\u0646 \u0648\u06ce\u0631\u062a\u0648\u0627\u06b5\u06cc\u0632\u06d5\u06cc\u0634\u0646 \u0648 \u062a\u06d5\u0644\u0627\u0631\u0633\u0627\u0632\u06cc \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633 \u067e\u0695 \u062f\u06d5\u06a9\u0627\u062a\u06d5\u0648\u06d5. \u0644\u06d5 \u062c\u06cc\u0627\u062a\u06cc \u067e\u0634\u062a \u0628\u06d5\u0633\u062a\u0646 \u0628\u06d5 \u0648\u06ce\u0646\u06d5\u06af\u0631\u062a\u0646\u06cc \u06a9\u0648\u06ce\u0631\u0627\u0646\u06d5\u06cc \u0647\u0627\u06cc\u067e\u06d5\u0631\u06a4\u0627\u06cc\u0632\u06d5\u0631\u060c CloudSave \u0628\u0631\u06cc\u06a9\u0627\u0631\u06cc application-aware \u0628\u06d5\u06a9\u0627\u0631\u062f\u06d5\u0647\u06ce\u0646\u06ce\u062a \u06a9\u06d5 \u0628\u06d5 \u0634\u06ce\u0648\u06d5\u06cc\u06d5\u06a9\u06cc \u0695\u06d5\u0633\u06d5\u0646 \u0644\u06d5\u06af\u06d5\u06b5 SQL Server\u060c PostgreSQL\u060c MySQL\u060c \u0648 Oracle \u06cc\u06d5\u06a9\u062f\u06d5\u06af\u0631\u06ce\u062a.<\/p>\n<p>\u06a9\u0627\u062a\u06ce\u06a9 CloudSave \u0628\u0627\u06a9\u0626\u06d5\u067e\u06ce\u06a9 \u062f\u06d5\u0633\u062a \u067e\u06ce \u062f\u06d5\u06a9\u0627\u062a:<br \/>\n1. \u0695\u0627\u0633\u062a\u06d5\u0648\u062e\u06c6 \u0644\u06d5 \u0695\u06ce\u06af\u06d5\u06cc API \u06cc\u06d5 \u0695\u06d5\u0633\u06d5\u0646\u06d5\u06a9\u0627\u0646\u06d5\u0648\u06d5 (\u0648\u06d5\u06a9 VSS \u0628\u06c6 \u0648\u06cc\u0646\u062f\u06c6\u0632 \u06cc\u0627\u0646 \u0633\u062a\u0631\u06cc\u0645\u06cc\u0646\u06af\u06cc \u0695\u06d5\u0633\u06d5\u0646\u06cc WAL \u0628\u06c6 \u0644\u06cc\u0646\u0648\u06a9\u0633) \u067e\u06d5\u06cc\u0648\u06d5\u0646\u062f\u06cc \u0644\u06d5\u06af\u06d5\u06b5 \u0628\u0632\u0648\u06ce\u0646\u06d5\u0631\u06cc \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633\u06d5\u06a9\u06d5 \u062f\u06d5\u06a9\u0627\u062a.<br \/>\n2. \u0628\u06d5\u062a\u0627\u06b5\u06a9\u0631\u062f\u0646\u06cc \u0628\u0648\u0641\u0631\u06d5\u06a9\u0627\u0646\u06cc \u0628\u06cc\u0631\u06af\u06d5 \u0628\u06c6 \u062f\u06cc\u0633\u06a9 \u0695\u06ce\u06a9\u062f\u06d5\u062e\u0627\u062a \u0628\u06d5\u0628\u06ce \u0626\u06d5\u0648\u06d5\u06cc \u0628\u0628\u06ce\u062a\u06d5 \u0647\u06c6\u06cc VM stun \u06cc \u062a\u06ce\u06a9\u062f\u06d5\u0631.<br \/>\n3. \u0628\u06d5 \u0633\u06d5\u0644\u0627\u0645\u06d5\u062a\u06cc \u0641\u0627\u06cc\u0644\u06d5\u06a9\u0627\u0646\u06cc \u062f\u0627\u062a\u0627 \u062f\u06d5\u06af\u0631\u06ce\u062a \u0648 \u0628\u06d5 \u0634\u06ce\u0648\u06d5\u06cc\u06d5\u06a9\u06cc \u0626\u06c6\u062a\u06c6\u0645\u0627\u062a\u06cc\u06a9\u06cc \u0628\u0695\u06cc\u0646\u06cc \u0644\u06c6\u06af\u06cc \u062a\u0631\u0627\u0646\u0633\u0627\u06a9\u0634\u0646 \u0628\u06d5\u0695\u06ce\u0648\u06d5\u062f\u06d5\u0628\u0627\u062a.<br \/>\n4. \u0628\u06d5 \u0628\u06d5\u0631\u062f\u06d5\u0648\u0627\u0645\u06cc \u0628\u0627\u06a9\u0626\u06d5\u067e\u06cc \u0644\u06c6\u06af\u06d5\u06a9\u0627\u0646\u06cc \u062a\u0631\u0627\u0646\u0633\u0627\u06a9\u0634\u0646 \u062f\u06d5\u06a9\u0627\u062a\u060c \u06a9\u06d5 \u0695\u06ce\u06af\u06d5 \u0628\u06d5 \u06af\u06d5\u0695\u0627\u0646\u062f\u0646\u06d5\u0648\u06d5\u06cc \u0648\u0631\u062f\u06cc \u06a9\u0627\u062a\u06cc (PITR) \u062f\u06d5\u062f\u0627\u062a \u0628\u06d5 \u0686\u06d5\u0646\u062f \u06a9\u0644\u06cc\u06a9\u06ce\u06a9.<\/p>\n<p>\u0628\u06d5 \u0644\u0627\u0628\u0631\u062f\u0646\u06cc \u0626\u0627\u06b5\u06c6\u0632\u06cc \u06af\u0648\u0646\u062c\u0627\u0646\u06cc \u0626\u06d5\u067e\u06b5\u06cc\u06a9\u06d5\u06cc\u0634\u0646 \u0628\u06c6 CloudSave\u060c \u0628\u06d5\u0695\u06ce\u0648\u06d5\u0628\u06d5\u0631\u0627\u0646\u06cc \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633 \u0648 \u0628\u06d5\u0695\u06ce\u0648\u06d5\u0628\u06d5\u0631\u0627\u0646\u06cc \u0633\u06cc\u0633\u062a\u06d5\u0645 \u062f\u06d5\u062a\u0648\u0627\u0646\u0646 \u062f\u06b5\u0646\u06cc\u0627\u06cc\u06cc \u0628\u062f\u06d5\u0646 \u0644\u06d5 \u067e\u0627\u0631\u0627\u0633\u062a\u0646\u06cc \u062f\u0627\u062a\u0627 \u0628\u06d5\u0628\u06ce \u0626\u06d5\u0648\u06d5\u06cc \u06a9\u0627\u0631\u0627\u06cc\u06cc \u06cc\u0627\u0646 \u0628\u06d5\u0631\u062f\u06d5\u0633\u062a\u0628\u0648\u0648\u0646\u06cc \u06a9\u06b5\u0627\u0633\u062a\u06d5\u0631\u06d5\u06a9\u0627\u0646\u06cc \u0628\u06d5\u0631\u0647\u06d5\u0645\u0647\u06ce\u0646\u0627\u0646 \u0642\u0648\u0631\u0628\u0627\u0646\u06cc \u0628\u06a9\u06d5\u0646.<\/p>\n<h2>\u062f\u06d5\u0631\u06d5\u0646\u062c\u0627\u0645<\/h2>\n<p>\u0648\u06ce\u0646\u06d5\u06af\u0631\u062a\u0646\u06cc \u0626\u0627\u0645\u06ce\u0631\u06d5 \u0648\u06ce\u0631\u062a\u0648\u0627\u06b5\u06d5\u06a9\u0627\u0646 \u0626\u0627\u0645\u0631\u0627\u0632\u06ce\u06a9\u06cc \u0633\u06d5\u0631\u0633\u0648\u0695\u0647\u06ce\u0646\u06d5\u0631\u06d5 \u0628\u06c6 \u0628\u06d5\u0695\u06ce\u0648\u06d5\u0628\u0631\u062f\u0646\u06cc \u0698\u06ce\u0631\u062e\u0627\u0646\u060c \u0628\u06d5\u06b5\u0627\u0645 \u0626\u06d5\u0648\u0627\u0646 \u0628\u06d5 \u0628\u0646\u06d5\u0695\u06d5\u062a\u06cc \u0644\u06d5\u06af\u06d5\u06b5 \u067e\u06ce\u062f\u0627\u0648\u06cc\u0633\u062a\u06cc\u06cc\u06d5\u06a9\u0627\u0646\u06cc ACID \u06cc \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633\u06d5 \u062a\u0631\u0627\u0646\u0633\u0627\u06a9\u0634\u0646\u0627\u06b5\u06d5\u06a9\u0627\u0646 \u0646\u0627\u06af\u0648\u0646\u062c\u06ce\u0646. \u067e\u0634\u062a \u0628\u06d5\u0633\u062a\u0646 \u0628\u06d5 \u0648\u06ce\u0646\u06d5\u06af\u0631\u062a\u0646\u06cc crash-consistent \u06cc \u0647\u0627\u06cc\u067e\u06d5\u0631\u06a4\u0627\u06cc\u0632\u06d5\u0631 \u0695\u06ce\u06a9\u062e\u0631\u0627\u0648\u06d5\u06a9\u06d5\u062a \u062a\u0648\u0648\u0634\u06cc \u0644\u0627\u067e\u06d5\u0695\u06d5\u06cc \u062f\u0695\u0627\u0648\u060c \u0632\u0646\u062c\u06cc\u0631\u06d5\u06cc \u0695\u06cc\u067e\u0644\u06cc\u06a9\u06d5\u06cc\u0634\u0646\u06cc \u0634\u06a9\u0627\u0648\u060c \u0648 \u0644\u06d5\u062f\u06d5\u0633\u062a\u062f\u0627\u0646\u06cc \u062f\u0627\u062a\u0627\u06cc \u06a9\u0627\u0631\u06d5\u0633\u0627\u062a\u0628\u0627\u0631 \u062f\u06d5\u06a9\u0627\u062a.<\/p>\n<p>\u0628\u06c6 \u067e\u0627\u0631\u0627\u0633\u062a\u0646\u06cc \u062f\u0627\u062a\u0627 \u06af\u0631\u0646\u06af\u06d5\u06a9\u0627\u0646\u062a\u060c \u062f\u06d5\u0628\u06ce\u062a application-aware quiescing \u062c\u06ce\u0628\u06d5\u062c\u06ce \u0628\u06a9\u06d5\u06cc\u062a\u060c \u0645\u06cc\u062a\u06c6\u062f\u06c6\u0644\u06c6\u0698\u06cc\u06cc\u06d5\u06a9\u0627\u0646\u06cc \u0628\u0627\u06a9\u0626\u06d5\u067e\u06cc \u0695\u06d5\u0633\u06d5\u0646\u06cc \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633 \u0628\u06d5\u06a9\u0627\u0631\u0628\u0647\u06ce\u0646\u06cc\u062a\u060c \u0648 \u0626\u06d5\u0631\u0634\u06cc\u0641\u06cc \u0628\u06d5\u0631\u062f\u06d5\u0648\u0627\u0645\u06cc \u0644\u06c6\u06af\u06cc \u062a\u0631\u0627\u0646\u0633\u0627\u06a9\u0634\u0646 \u0628\u067e\u0627\u0631\u06ce\u0632\u06cc\u062a. \u0628\u06d5 \u067e\u06d5\u0633\u06d5\u0646\u062f\u06a9\u0631\u062f\u0646\u06cc \u0686\u0627\u0631\u06d5\u0633\u06d5\u0631\u06d5\u06a9\u0627\u0646\u06cc \u0628\u0627\u06a9\u0626\u06d5\u067e\u06cc \u06a9\u06c6\u0645\u067e\u0627\u0646\u06cc\u0627\u06a9\u0627\u0646 \u06a9\u06d5 \u0628\u06c6 \u0626\u06d5\u0645 \u0645\u06d5\u0628\u06d5\u0633\u062a\u06d5 \u062f\u0631\u0648\u0633\u062a\u06a9\u0631\u0627\u0648\u0646\u060c \u062f\u06d5\u062a\u0648\u0627\u0646\u06cc\u062a \u062f\u06b5\u0646\u06cc\u0627\u0628\u06cc\u062a \u06a9\u06d5 \u062f\u0627\u062a\u0627\u0628\u06d5\u06cc\u0633\u06d5\u06a9\u0627\u0646\u062a \u0628\u06d5 \u0628\u06d5\u0631\u0632\u06cc \u0628\u06d5\u0631\u062f\u06d5\u0633\u062a \u062f\u06d5\u0645\u06ce\u0646\u0646\u06d5\u0648\u06d5\u060c \u0628\u06d5 \u062a\u06d5\u0648\u0627\u0648\u06cc \u062f\u06d5\u06af\u06d5\u0695\u06ce\u0646\u0631\u06ce\u0646\u06d5\u0648\u06d5\u060c \u0648 \u0628\u06d5 \u062a\u06d5\u0648\u0627\u0648\u06cc \u067e\u0627\u0631\u06ce\u0632\u0631\u0627\u0648\u0646.<\/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. Learn DBA best practices for application-consistent backups, avoiding VM stun, and ensuring data integrity with CloudSave.","rank_math_focus_keyword":"VM snapshots transactional databases","footnotes":""},"categories":[527],"tags":[3396,3716,3717,3718,3719,3720,3721],"class_list":["post-5492","post","type-post","status-publish","format-standard","hentry","category-database-backup","tag-data-integrity","tag-database-corruption","tag-database-recovery","tag-dba-guide","tag-hypervisor-snapshots","tag-transactional-databases","tag-vm-snapshots"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.7 (Yoast SEO v27.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Why VM Snapshots Are Unsafe for Transactional Databases<\/title>\n<meta name=\"description\" content=\"&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.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cloudsave.app\/ku\/knowledge-base\/%d8%a8%db%86%da%86%db%8c-%d9%88%db%8e%d9%86%db%95%db%8c-%d8%b3%d8%a7%d8%aa%db%8c-vm-snapshots-%d8%a8%db%86-%d8%a8%d9%86%da%a9%db%95%d8%af%d8%b1%d8%a7%d9%88%db%95-%d9%85%d8%a7%d9%85%db%95%da%b5%db%95\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u0628\u06c6\u0686\u06cc \u0648\u06ce\u0646\u06d5\u06cc \u0633\u0627\u062a\u06cc VM (Snapshots) \u0628\u06c6 \u0628\u0646\u06a9\u06d5\u062f\u0631\u0627\u0648\u06d5 \u0645\u0627\u0645\u06d5\u06b5\u06d5\u06cc\u06cc\u06d5\u06a9\u0627\u0646 \u0633\u06d5\u0644\u0627\u0645\u06d5\u062a \u0646\u06cc\u0646: \u0695\u06ce\u0628\u06d5\u0631\u06ce\u06a9\u06cc \u0628\u06d5\u0695\u06ce\u0648\u06d5\u0628\u06d5\u0631\u06cc \u0628\u0646\u06a9\u06d5\u062f\u0631\u0627\u0648\u06d5 (DBA) \u0628\u06c6 \u067e\u0627\u0631\u0627\u0633\u062a\u0646\u06cc \u06cc\u06d5\u06a9\u067e\u0627\u0631\u0686\u06d5\u06cc\u06cc \u062f\u0627\u062a\u0627\" \/>\n<meta property=\"og:description\" content=\"&gt; Discover why standard VM snapshots cause data corruption in transactional databases like PostgreSQL and SQL Server. 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