{"id":476390,"date":"2023-08-09T07:28:31","date_gmt":"2023-08-09T07:28:31","guid":{"rendered":""},"modified":"2023-09-05T11:12:37","modified_gmt":"2023-09-05T11:12:37","slug":"concurrency-control","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/ar\/wiki\/concurrency-control\/","title":{"rendered":"\u0627\u0644\u062a\u062d\u0643\u0645 \u0627\u0644\u062a\u0632\u0627\u0645\u0646\u064a"},"content":{"rendered":"<p>\u064a\u0639\u062f \u0627\u0644\u062a\u062d\u0643\u0645 \u0641\u064a \u0627\u0644\u062a\u0632\u0627\u0645\u0646 \u062c\u0627\u0646\u0628\u064b\u0627 \u062d\u064a\u0648\u064a\u064b\u0627 \u0644\u0623\u0646\u0638\u0645\u0629 \u0627\u0644\u062d\u0648\u0633\u0628\u0629 \u0627\u0644\u062d\u062f\u064a\u062b\u0629\u060c \u062e\u0627\u0635\u0629 \u0641\u064a \u0633\u064a\u0627\u0642 \u0627\u0644\u062e\u0648\u0627\u062f\u0645 \u0627\u0644\u0648\u0643\u064a\u0644\u0629. \u0625\u0646\u0647\u0627 \u0637\u0631\u064a\u0642\u0629 \u062a\u0633\u062a\u062e\u062f\u0645 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\u062a\u062a\u0636\u0645\u0646 \u0623\u0646\u0648\u0627\u0639 \u0627\u0644\u0623\u0642\u0641\u0627\u0644 \u0627\u0644\u0634\u0627\u0626\u0639\u0629 \u0645\u0627 \u064a\u0644\u064a:<\/p>\n<ul>\n<li>\n<p><strong>\u0627\u0644\u0642\u0641\u0644 \u0627\u0644\u0645\u0634\u062a\u0631\u0643 (S-lock):<\/strong> \u064a\u0633\u0645\u062d \u0644\u0645\u0639\u0627\u0645\u0644\u0627\u062a \u0645\u062a\u0639\u062f\u062f\u0629 \u0628\u0642\u0631\u0627\u0621\u0629 \u0645\u0648\u0631\u062f \u0641\u064a \u0648\u0642\u062a \u0648\u0627\u062d\u062f \u0648\u0644\u0643\u0646\u0647 \u064a\u0645\u0646\u0639 \u0627\u0644\u0648\u0635\u0648\u0644 \u0644\u0644\u0643\u062a\u0627\u0628\u0629.<\/p>\n<\/li>\n<li>\n<p><strong>\u0627\u0644\u0642\u0641\u0644 \u0627\u0644\u062d\u0635\u0631\u064a (X-lock):<\/strong> \u064a\u0636\u0645\u0646 \u0627\u0644\u0648\u0635\u0648\u0644 \u0627\u0644\u062d\u0635\u0631\u064a\u060c \u0648\u064a\u0645\u0646\u0639 \u0623\u064a \u0645\u0639\u0627\u0645\u0644\u0629 \u0623\u062e\u0631\u0649 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\u0627\u0644\u0646\u0638\u0627\u0645 \u0645\u0646 \u0648\u062c\u0648\u062f \u062a\u0639\u0627\u0631\u0636\u0627\u062a \u0648\u064a\u0636\u0645\u0646 \u0627\u062a\u0633\u0627\u0642 \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a. \u0625\u0630\u0627 \u062a\u0645 \u0627\u0643\u062a\u0634\u0627\u0641 \u062a\u0639\u0627\u0631\u0636\u060c \u0641\u0633\u064a\u062a\u0645 \u0627\u0644\u062a\u0631\u0627\u062c\u0639 \u0639\u0646 \u0627\u0644\u0645\u0639\u0627\u0645\u0644\u0629\u060c \u0648\u062a\u0643\u0631\u0631 \u0627\u0644\u0639\u0645\u0644\u064a\u0629 \u062d\u062a\u0649 \u062a\u0646\u062c\u062d.<\/p>\n<\/li>\n<\/ol>\n<h2>\u062a\u062d\u0644\u064a\u0644 \u0627\u0644\u0633\u0645\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629 \u0644\u0644\u062a\u062d\u0643\u0645 \u0641\u064a \u0627\u0644\u062a\u0632\u0627\u0645\u0646<\/h2>\n<p>\u062a\u0634\u0645\u0644 \u0627\u0644\u0645\u064a\u0632\u0627\u062a \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629 \u0644\u0644\u062a\u062d\u0643\u0645 \u0641\u064a \u0627\u0644\u062a\u0632\u0627\u0645\u0646 \u0645\u0627 \u064a\u0644\u064a:<\/p>\n<ul>\n<li>\n<p><strong>\u0639\u0632\u0644:<\/strong> \u0627\u0644\u062a\u0623\u0643\u062f \u0645\u0646 \u062a\u0646\u0641\u064a\u0630 \u0643\u0644 \u0645\u0639\u0627\u0645\u0644\u0629 \u0628\u0645\u0639\u0632\u0644 \u0639\u0646 \u0627\u0644\u0645\u0639\u0627\u0645\u0644\u0627\u062a \u0627\u0644\u0623\u062e\u0631\u0649 \u0644\u0645\u0646\u0639 \u0627\u0644\u062a\u062f\u0627\u062e\u0644 \u0648\u0627\u0644\u062d\u0641\u0627\u0638 \u0639\u0644\u0649 \u0627\u0644\u0627\u062a\u0633\u0627\u0642.<\/p>\n<\/li>\n<li>\n<p><strong>\u062f\u0642\u0629 \u0627\u0644\u0642\u0641\u0644:<\/strong> \u062a\u062d\u062f\u064a\u062f \u062d\u062c\u0645 \u0648\u0646\u0637\u0627\u0642 \u0627\u0644\u0623\u0642\u0641\u0627\u0644 \u0644\u062a\u062d\u0642\u064a\u0642 \u0627\u0644\u062a\u0648\u0627\u0632\u0646 \u0628\u064a\u0646 \u0627\u0644\u062a\u0632\u0627\u0645\u0646 \u0648\u0627\u0644\u062a\u0646\u0627\u0641\u0633 \u0639\u0644\u0649 \u0627\u0644\u0645\u0648\u0627\u0631\u062f.<\/p>\n<\/li>\n<li>\n<p><strong>\u0627\u0644\u062a\u0639\u0627\u0645\u0644 \u0645\u0639 \u062d\u0627\u0644\u0629 \u0627\u0644\u062c\u0645\u0648\u062f:<\/strong> \u062a\u0646\u0641\u064a\u0630 \u0622\u0644\u064a\u0627\u062a \u0644\u0627\u0643\u062a\u0634\u0627\u0641 \u0648\u062d\u0644 \u062d\u0627\u0644\u0627\u062a \u0627\u0644\u062c\u0645\u0648\u062f \u0627\u0644\u062a\u064a \u062a\u062d\u062f\u062b \u0639\u0646\u062f\u0645\u0627 \u062a\u0646\u062a\u0638\u0631 \u0627\u0644\u0645\u0639\u0627\u0645\u0644\u0627\u062a \u0628\u0639\u0636\u0647\u0627 \u0627\u0644\u0628\u0639\u0636 \u0644\u062a\u062d\u0631\u064a\u0631 \u0627\u0644\u0623\u0642\u0641\u0627\u0644.<\/p>\n<\/li>\n<li>\n<p><strong>\u0645\u062a\u0627\u0646\u0629 \u0627\u0644\u0645\u0639\u0627\u0645\u0644\u0629:<\/strong> \u0636\u0645\u0627\u0646 \u0623\u0646\u0647 \u0628\u0645\u062c\u0631\u062f \u062a\u0646\u0641\u064a\u0630 \u0627\u0644\u0645\u0639\u0627\u0645\u0644\u0629\u060c \u062a\u0643\u0648\u0646 \u062a\u063a\u064a\u064a\u0631\u0627\u062a\u0647\u0627 \u062f\u0627\u0626\u0645\u0629 \u0648\u0644\u0627 \u062a\u062a\u0623\u062b\u0631 \u0628\u0641\u0634\u0644 \u0627\u0644\u0646\u0638\u0627\u0645.<\/p>\n<\/li>\n<li>\n<p><strong>\u062e\u0648\u0627\u0631\u0632\u0645\u064a\u0627\u062a \u0627\u0644\u062a\u062d\u0643\u0645 \u0641\u064a \u0627\u0644\u062a\u0632\u0627\u0645\u0646:<\/strong> \u064a\u062a\u0645 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u062e\u0648\u0627\u0631\u0632\u0645\u064a\u0627\u062a \u0645\u062e\u062a\u0644\u0641\u0629 \u0645\u062b\u0644 \u0627\u0644\u0642\u0641\u0644 \u0639\u0644\u0649 \u0645\u0631\u062d\u0644\u062a\u064a\u0646 (2PL)\u060c \u0648\u062a\u0631\u062a\u064a\u0628 \u0627\u0644\u0637\u0627\u0628\u0639 \u0627\u0644\u0632\u0645\u0646\u064a\u060c \u0648\u0639\u0632\u0644 \u0627\u0644\u0644\u0642\u0637\u0627\u062a \u0627\u0644\u0642\u0627\u0628\u0644\u0629 \u0644\u0644\u062a\u0633\u0644\u0633\u0644 (SSI) \u0644\u0625\u062f\u0627\u0631\u0629 \u0627\u0644\u0648\u0635\u0648\u0644 \u0627\u0644\u0645\u062a\u0632\u0627\u0645\u0646.<\/p>\n<\/li>\n<\/ul>\n<h2>\u0623\u0646\u0648\u0627\u0639 \u0627\u0644\u062a\u062d\u0643\u0645 \u0641\u064a \u0627\u0644\u062a\u0632\u0627\u0645\u0646<\/h2>\n<p>\u064a\u0645\u0643\u0646 \u062a\u0635\u0646\u064a\u0641 \u0627\u0644\u062a\u062d\u0643\u0645 \u0641\u064a \u0627\u0644\u062a\u0632\u0627\u0645\u0646 \u0628\u0646\u0627\u0621\u064b \u0639\u0644\u0649 \u0623\u0633\u0627\u0644\u064a\u0628\u0647\u0645:<\/p>\n<table>\n<thead>\n<tr>\n<th>\u064a\u0643\u062a\u0628<\/th>\n<th>\u0648\u0635\u0641<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u0627\u0644\u062a\u062d\u0643\u0645 \u0627\u0644\u0645\u062a\u0634\u0627\u0626\u0645 \u0641\u064a \u0627\u0644\u062a\u0632\u0627\u0645\u0646<\/td>\n<td>\u064a\u0633\u062a\u062e\u062f\u0645 \u0627\u0644\u0623\u0642\u0641\u0627\u0644 \u0644\u0645\u0646\u0639 \u0627\u0644\u0648\u0635\u0648\u0644 \u0627\u0644\u0645\u062a\u0632\u0627\u0645\u0646 \u0625\u0644\u0649 \u0627\u0644\u0645\u0648\u0627\u0631\u062f.<\/td>\n<\/tr>\n<tr>\n<td>\u0627\u0644\u062a\u062d\u0643\u0645 \u0627\u0644\u0645\u062a\u0641\u0627\u0626\u0644 \u0641\u064a \u0627\u0644\u062a\u0632\u0627\u0645\u0646<\/td>\n<td>\u064a\u0633\u0645\u062d \u0628\u0627\u0644\u0648\u0635\u0648\u0644 \u0627\u0644\u0645\u062a\u0632\u0627\u0645\u0646 \u0648\u064a\u062a\u062d\u0642\u0642 \u0645\u0646 \u0627\u0644\u062a\u0639\u0627\u0631\u0636\u0627\u062a \u0642\u0628\u0644 \u0627\u0644\u0627\u0644\u062a\u0632\u0627\u0645.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u0637\u0631\u0642 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0627\u0644\u062a\u062d\u0643\u0645 \u0641\u064a \u0627\u0644\u062a\u0632\u0627\u0645\u0646 \u0648\u0645\u0634\u0627\u0643\u0644\u0647 \u0648\u062d\u0644\u0648\u0644\u0647\u0627 \u0627\u0644\u0645\u062a\u0639\u0644\u0642\u0629 \u0628\u0627\u0644\u0627\u0633\u062a\u062e\u062f\u0627\u0645<\/h2>\n<p>\u064a\u0639\u062f \u0627\u0644\u062a\u062d\u0643\u0645 \u0641\u064a \u0627\u0644\u062a\u0632\u0627\u0645\u0646 \u0623\u0645\u0631\u064b\u0627 \u0636\u0631\u0648\u0631\u064a\u064b\u0627 \u0641\u064a \u0633\u064a\u0646\u0627\u0631\u064a\u0648\u0647\u0627\u062a \u0645\u062e\u062a\u0644\u0641\u0629\u060c \u0628\u0645\u0627 \u0641\u064a \u0630\u0644\u0643:<\/p>\n<ul>\n<li>\n<p><strong>\u0623\u0646\u0638\u0645\u0629 \u0625\u062f\u0627\u0631\u0629 \u0642\u0648\u0627\u0639\u062f \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a:<\/strong> \u0636\u0645\u0627\u0646 \u0627\u062a\u0633\u0627\u0642 \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a \u0648\u0633\u0644\u0627\u0645\u062a\u0647\u0627 \u0641\u064a \u0628\u064a\u0626\u0627\u062a \u0642\u0648\u0627\u0639\u062f \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a \u0645\u062a\u0639\u062f\u062f\u0629 \u0627\u0644\u0645\u0633\u062a\u062e\u062f\u0645\u064a\u0646.<\/p>\n<\/li>\n<li>\n<p><strong>\u0627\u0644\u062e\u0648\u0627\u062f\u0645 \u0627\u0644\u0648\u0643\u064a\u0644\u0629:<\/strong> \u0625\u062f\u0627\u0631\u0629 \u0627\u0644\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u0645\u062a\u0632\u0627\u0645\u0646\u0629 \u0645\u0646 \u0639\u0645\u0644\u0627\u0621 \u0645\u062a\u0639\u062f\u062f\u064a\u0646 \u0644\u062a\u0642\u062f\u064a\u0645 \u062e\u062f\u0645\u0627\u062a \u0641\u0639\u0627\u0644\u0629 \u0648\u0645\u0648\u062b\u0648\u0642\u0629.<\/p>\n<\/li>\n<\/ul>\n<p>\u062a\u0634\u0645\u0644 \u0627\u0644\u0645\u0634\u0627\u0643\u0644 \u0627\u0644\u0645\u062a\u0639\u0644\u0642\u0629 \u0628\u0627\u0644\u062a\u062d\u0643\u0645 \u0641\u064a \u0627\u0644\u062a\u0632\u0627\u0645\u0646 \u0645\u0627 \u064a\u0644\u064a:<\/p>\n<ul>\n<li>\n<p><strong>\u0627\u0644\u0646\u0641\u0642\u0627\u062a \u0627\u0644\u0639\u0627\u0645\u0629 \u0644\u0644\u0623\u062f\u0627\u0621:<\/strong> \u0642\u062f \u062a\u0624\u062f\u064a \u0627\u0644\u0623\u0633\u0627\u0644\u064a\u0628 \u0627\u0644\u0642\u0627\u0626\u0645\u0629 \u0639\u0644\u0649 \u0627\u0644\u0642\u0641\u0644 \u0625\u0644\u0649 \u0627\u0644\u062a\u0646\u0627\u0641\u0633 \u0648\u062a\u0642\u0644\u064a\u0644 \u0627\u0644\u0623\u062f\u0627\u0621.<\/p>\n<\/li>\n<li>\n<p><strong>\u0627\u0644\u0645\u0622\u0632\u0642:<\/strong> \u064a\u0645\u0643\u0646 \u0623\u0646 \u062a\u0624\u062f\u064a \u0627\u0644\u0645\u0639\u0627\u0645\u0644\u0627\u062a \u0627\u0644\u062a\u064a \u062a\u0646\u062a\u0638\u0631 \u0623\u0642\u0641\u0627\u0644 \u0628\u0639\u0636\u0647\u0627 \u0627\u0644\u0628\u0639\u0636 \u0625\u0644\u0649 \u062d\u062f\u0648\u062b \u062d\u0627\u0644\u0629 \u062a\u0648\u0642\u0641 \u062a\u0627\u0645.<\/p>\n<\/li>\n<\/ul>\n<p>\u0644\u0645\u0639\u0627\u0644\u062c\u0629 \u0647\u0630\u0647 \u0627\u0644\u0645\u0634\u0643\u0644\u0627\u062a\u060c \u064a\u062a\u0645 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u062d\u0644\u0648\u0644 \u0645\u062b\u0644 \u0627\u0644\u0643\u0634\u0641 \u0639\u0646 \u062d\u0627\u0644\u0629 \u062a\u0648\u0642\u0641 \u062a\u0627\u0645 \u0648\u062e\u0648\u0627\u0631\u0632\u0645\u064a\u0627\u062a \u0627\u0644\u062d\u0644 \u0648\u062a\u062d\u0633\u064a\u0646 \u0625\u062f\u0627\u0631\u0629 \u0627\u0644\u0642\u0641\u0644 \u0648\u0636\u0628\u0637 \u0645\u0639\u0644\u0645\u0627\u062a \u0627\u0644\u062a\u062d\u0643\u0645 \u0641\u064a \u0627\u0644\u062a\u0632\u0627\u0645\u0646.<\/p>\n<h2>\u0627\u0644\u062e\u0635\u0627\u0626\u0635 \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629 \u0648\u0645\u0642\u0627\u0631\u0646\u0627\u062a \u0623\u062e\u0631\u0649 \u0645\u0639 \u0645\u0635\u0637\u0644\u062d\u0627\u062a \u0645\u0645\u0627\u062b\u0644\u0629<\/h2>\n<table>\n<thead>\n<tr>\n<th>\u0635\u0641\u0629 \u0645\u0645\u064a\u0632\u0629<\/th>\n<th>\u0627\u0644\u062a\u062d\u0643\u0645 \u0627\u0644\u062a\u0632\u0627\u0645\u0646\u064a<\/th>\n<th>\u062a\u0645\u0627\u062b\u0644<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u063a\u0627\u064a\u0629<\/td>\n<td>\u0625\u062f\u0627\u0631\u0629 \u0627\u0644\u0648\u0635\u0648\u0644 \u0627\u0644\u0645\u062a\u0632\u0627\u0645\u0646<\/td>\n<td>\u0627\u0644\u062a\u0646\u0641\u064a\u0630 \u0627\u0644\u0645\u062a\u0632\u0627\u0645\u0646<\/td>\n<\/tr>\n<tr>\n<td>\u0631\u0643\u0632<\/td>\n<td>\u062a\u0646\u0627\u0633\u0642 \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a<\/td>\n<td>\u062a\u0639\u0632\u064a\u0632 \u0627\u0644\u0623\u062f\u0627\u0621<\/td>\n<\/tr>\n<tr>\n<td>\u0627\u0644\u0627\u0633\u062a\u062e\u062f\u0627\u0645<\/td>\n<td>\u0642\u0648\u0627\u0639\u062f \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a \u0648\u0627\u0644\u062e\u0648\u0627\u062f\u0645 \u0627\u0644\u0648\u0643\u064a\u0644\u0629<\/td>\n<td>\u0627\u0644\u0645\u0647\u0627\u0645 \u0627\u0644\u062a\u064a \u062a\u0633\u062a\u0647\u0644\u0643 \u0648\u062d\u062f\u0629 \u0627\u0644\u0645\u0639\u0627\u0644\u062c\u0629 \u0627\u0644\u0645\u0631\u0643\u0632\u064a\u0629 (CPU) \u0628\u0634\u0643\u0644 \u0645\u0643\u062b\u0641<\/td>\n<\/tr>\n<tr>\n<td>\u0627\u0644\u0622\u0644\u064a\u0629 \u0627\u0644\u0631\u0626\u064a\u0633\u064a\u0629<\/td>\n<td>\u0627\u0644\u0623\u0642\u0641\u0627\u0644\u060c \u062a\u0631\u062a\u064a\u0628 \u0627\u0644\u0637\u0648\u0627\u0628\u0639 \u0627\u0644\u0632\u0645\u0646\u064a\u0629<\/td>\n<td>\u062a\u0642\u0633\u064a\u0645 \u0627\u0644\u0645\u0648\u0636\u0648\u0639 \u0648\u0627\u0644\u0639\u0645\u0644\u064a\u0629<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>\u0648\u062c\u0647\u0627\u062a \u0646\u0638\u0631 \u0648\u062a\u0642\u0646\u064a\u0627\u062a \u0627\u0644\u0645\u0633\u062a\u0642\u0628\u0644 \u0627\u0644\u0645\u062a\u0639\u0644\u0642\u0629 \u0628\u0627\u0644\u062a\u062d\u0643\u0645 \u0641\u064a \u0627\u0644\u062a\u0632\u0627\u0645\u0646<\/h2>\n<p>\u0645\u0639 \u062a\u0637\u0648\u0631 \u0627\u0644\u062a\u0643\u0646\u0648\u0644\u0648\u062c\u064a\u0627\u060c \u0633\u0648\u0641 \u062a\u0633\u062a\u0645\u0631 \u0627\u0644\u062a\u0642\u0646\u064a\u0627\u062a \u0648\u0627\u0644\u0623\u0633\u0627\u0644\u064a\u0628 \u0627\u0644\u062c\u062f\u064a\u062f\u0629 \u0644\u0644\u062a\u062d\u0643\u0645 \u0641\u064a \u0627\u0644\u062a\u0632\u0627\u0645\u0646 \u0641\u064a \u0627\u0644\u0638\u0647\u0648\u0631. \u0628\u0639\u0636 \u0627\u0644\u062a\u0637\u0648\u0631\u0627\u062a \u0627\u0644\u0645\u0633\u062a\u0642\u0628\u0644\u064a\u0629 \u0627\u0644\u0645\u062d\u062a\u0645\u0644\u0629 \u062a\u0634\u0645\u0644:<\/p>\n<ul>\n<li>\n<p><strong>\u062e\u0648\u0627\u0631\u0632\u0645\u064a\u0627\u062a \u0645\u062a\u0642\u062f\u0645\u0629 \u062e\u0627\u0644\u064a\u0629 \u0645\u0646 \u0627\u0644\u0642\u0641\u0644:<\/strong> \u0627\u0644\u0628\u062d\u062b \u0648\u0627\u0644\u062a\u0637\u0648\u064a\u0631 \u0644\u062e\u0648\u0627\u0631\u0632\u0645\u064a\u0627\u062a \u062e\u0627\u0644\u064a\u0629 \u0645\u0646 \u0627\u0644\u0642\u0641\u0644 \u0648\u0627\u0644\u0627\u0646\u062a\u0638\u0627\u0631 \u0644\u062a\u0642\u0644\u064a\u0644 \u0627\u0644\u062a\u0646\u0627\u0641\u0633 \u0648\u062a\u062d\u0633\u064a\u0646 \u0627\u0644\u0623\u062f\u0627\u0621.<\/p>\n<\/li>\n<li>\n<p><strong>\u0627\u0644\u062a\u062d\u0643\u0645 \u0641\u064a \u0627\u0644\u062a\u0632\u0627\u0645\u0646 \u0627\u0644\u0645\u0648\u0632\u0639:<\/strong> \u0625\u062f\u0627\u0631\u0629 \u0627\u0644\u062a\u0632\u0627\u0645\u0646 \u0641\u064a \u0627\u0644\u0623\u0646\u0638\u0645\u0629 \u0627\u0644\u0645\u0648\u0632\u0639\u0629 \u0648\u0627\u0644\u0628\u064a\u0626\u0627\u062a \u0627\u0644\u0633\u062d\u0627\u0628\u064a\u0629 \u0644\u0644\u062a\u0639\u0627\u0645\u0644 \u0645\u0639 \u062a\u062d\u062f\u064a\u0627\u062a \u0642\u0627\u0628\u0644\u064a\u0629 \u0627\u0644\u062a\u0648\u0633\u0639.<\/p>\n<\/li>\n<li>\n<p><strong>\u062a\u0643\u0627\u0645\u0644 \u0627\u0644\u062a\u0639\u0644\u0645 \u0627\u0644\u0622\u0644\u064a:<\/strong> \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0646\u0645\u0627\u0630\u062c \u0627\u0644\u062a\u0639\u0644\u0645 \u0627\u0644\u0622\u0644\u064a \u0644\u0644\u062a\u0646\u0628\u0624 \u0628\u0622\u0644\u064a\u0627\u062a \u0627\u0644\u062a\u062d\u0643\u0645 \u0641\u064a \u0627\u0644\u062a\u0632\u0627\u0645\u0646 \u0648\u062a\u062d\u0633\u064a\u0646\u0647\u0627 \u0628\u0646\u0627\u0621\u064b \u0639\u0644\u0649 \u0623\u0639\u0628\u0627\u0621 \u0627\u0644\u0639\u0645\u0644 \u0648\u0623\u0646\u0645\u0627\u0637 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0627\u0644\u0645\u0648\u0627\u0631\u062f.<\/p>\n<\/li>\n<\/ul>\n<h2>\u0643\u064a\u0641 \u064a\u0645\u0643\u0646 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0627\u0644\u062e\u0648\u0627\u062f\u0645 \u0627\u0644\u0648\u0643\u064a\u0644\u0629 \u0623\u0648 \u0631\u0628\u0637\u0647\u0627 \u0628\u0627\u0644\u062a\u062d\u0643\u0645 \u0641\u064a \u0627\u0644\u062a\u0632\u0627\u0645\u0646<\/h2>\n<p>\u062a\u0644\u0639\u0628 \u0627\u0644\u062e\u0648\u0627\u062f\u0645 \u0627\u0644\u0648\u0643\u064a\u0644\u0629 \u062f\u0648\u0631\u064b\u0627 \u062d\u0627\u0633\u0645\u064b\u0627 \u0641\u064a \u0625\u062f\u0627\u0631\u0629 \u0637\u0644\u0628\u0627\u062a \u0627\u0644\u0639\u0645\u0644\u0627\u0621 \u0648\u062a\u0648\u0632\u064a\u0639\u0647\u0627 \u0639\u0644\u0649 \u0627\u0644\u062e\u0648\u0627\u062f\u0645 \u0627\u0644\u062e\u0644\u0641\u064a\u0629\u060c \u062d\u064a\u062b \u062a\u0639\u0645\u0644 \u0643\u0648\u0633\u064a\u0637 \u0628\u064a\u0646 \u0627\u0644\u0639\u0645\u0644\u0627\u0621 \u0648\u0627\u0644\u0645\u0648\u0627\u0631\u062f. \u0645\u0646 \u062e\u0644\u0627\u0644 \u062a\u0646\u0641\u064a\u0630 \u0622\u0644\u064a\u0627\u062a \u0627\u0644\u062a\u062d\u0643\u0645 \u0641\u064a \u0627\u0644\u062a\u0632\u0627\u0645\u0646\u060c \u064a\u0645\u0643\u0646 \u0644\u0644\u062e\u0648\u0627\u062f\u0645 \u0627\u0644\u0648\u0643\u064a\u0644\u0629 \u0627\u0644\u062a\u0639\u0627\u0645\u0644 \u0628\u0643\u0641\u0627\u0621\u0629 \u0645\u0639 \u0637\u0644\u0628\u0627\u062a \u0627\u0644\u0639\u0645\u0644\u0627\u0621 \u0627\u0644\u0645\u062a\u0632\u0627\u0645\u0646\u0629 \u0645\u0639 \u0636\u0645\u0627\u0646 \u0633\u0644\u0627\u0645\u0629 \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a \u0648\u0645\u0646\u0639 \u0639\u062f\u0645 \u062a\u0646\u0627\u0633\u0642 \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a.<\/p>\n<p>\u064a\u0633\u0627\u0639\u062f \u0627\u0644\u062a\u062d\u0643\u0645 \u0641\u064a \u0627\u0644\u062a\u0632\u0627\u0645\u0646 \u0641\u064a \u0627\u0644\u062e\u0648\u0627\u062f\u0645 \u0627\u0644\u0648\u0643\u064a\u0644\u0629 \u0639\u0644\u0649:<\/p>\n<ul>\n<li>\n<p>\u0645\u0646\u0639 \u0627\u0644\u062a\u0639\u0627\u0631\u0636\u0627\u062a \u0639\u0646\u062f\u0645\u0627 \u064a\u0637\u0644\u0628 \u0639\u062f\u0629 \u0639\u0645\u0644\u0627\u0621 \u0646\u0641\u0633 \u0627\u0644\u0645\u0648\u0631\u062f \u0641\u064a \u0648\u0642\u062a \u0648\u0627\u062d\u062f.<\/p>\n<\/li>\n<li>\n<p>\u062a\u062d\u0633\u064a\u0646 \u0627\u0633\u062a\u062e\u062f\u0627\u0645 \u0627\u0644\u0645\u0648\u0627\u0631\u062f \u0645\u0646 \u062e\u0644\u0627\u0644 \u0625\u062f\u0627\u0631\u0629 \u0627\u0644\u0637\u0644\u0628\u0627\u062a \u0627\u0644\u0645\u062a\u0632\u0627\u0645\u0646\u0629 \u0628\u0643\u0641\u0627\u0621\u0629.<\/p>\n<\/li>\n<li>\n<p>\u062a\u062d\u0633\u064a\u0646 \u0623\u062f\u0627\u0621 \u0627\u0644\u0646\u0638\u0627\u0645 \u0648\u0627\u0633\u062a\u062c\u0627\u0628\u062a\u0647 \u0628\u0634\u0643\u0644 \u0639\u0627\u0645.<\/p>\n<\/li>\n<\/ul>\n<h2>\u0631\u0648\u0627\u0628\u0637 \u0630\u0627\u062a \u0639\u0644\u0627\u0642\u0629<\/h2>\n<p>\u0644\u0645\u0632\u064a\u062f \u0645\u0646 \u0627\u0644\u0645\u0639\u0644\u0648\u0645\u0627\u062a \u062d\u0648\u0644 \u0627\u0644\u062a\u062d\u0643\u0645 \u0641\u064a \u0627\u0644\u062a\u0632\u0627\u0645\u0646\u060c \u064a\u0645\u0643\u0646\u0643 \u0627\u0633\u062a\u0643\u0634\u0627\u0641 \u0627\u0644\u0645\u0648\u0627\u0631\u062f \u0627\u0644\u062a\u0627\u0644\u064a\u0629:<\/p>\n<ol>\n<li><a href=\"https:\/\/en.wikipedia.org\/wiki\/Concurrency_control\" target=\"_new\" rel=\"noopener nofollow\">\u0627\u0644\u062a\u062d\u0643\u0645 \u0641\u064a \u0627\u0644\u062a\u0632\u0627\u0645\u0646 \u0641\u064a \u0642\u0648\u0627\u0639\u062f \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a - \u0648\u064a\u0643\u064a\u0628\u064a\u062f\u064a\u0627<\/a><\/li>\n<li><a href=\"https:\/\/www.tutorialspoint.com\/dbms\/dbms_concurrency_control.htm\" target=\"_new\" rel=\"noopener nofollow\">\u062a\u0642\u0646\u064a\u0627\u062a \u0627\u0644\u062a\u062d\u0643\u0645 \u0641\u064a \u0627\u0644\u062a\u0632\u0627\u0645\u0646 \u2013 \u0646\u0642\u0637\u0629 \u0627\u0644\u062f\u0631\u0648\u0633<\/a><\/li>\n<li><a href=\"https:\/\/www.oracle.com\/technical-resources\/articles\/database\/transaction-management-cdc.html\" target=\"_new\" rel=\"noopener nofollow\">\u062f\u0644\u064a\u0644 \u0634\u0627\u0645\u0644 \u0644\u0644\u062a\u062d\u0643\u0645 \u0641\u064a \u0627\u0644\u062a\u0632\u0627\u0645\u0646 \u0641\u064a \u0623\u0646\u0638\u0645\u0629 \u0642\u0648\u0627\u0639\u062f \u0627\u0644\u0628\u064a\u0627\u0646\u0627\u062a \u2013 \u0623\u0648\u0631\u0627\u0643\u0644<\/a><\/li>\n<li><a href=\"https:\/\/dl.acm.org\/doi\/10.1145\/3297858.3304027\" target=\"_new\" rel=\"noopener nofollow\">\u0627\u0644\u062a\u062d\u0643\u0645 \u0641\u064a \u0627\u0644\u062a\u0632\u0627\u0645\u0646 \u0641\u064a \u0627\u0644\u062e\u0648\u0627\u062f\u0645 \u0627\u0644\u0648\u0643\u064a\u0644\u0629 \u2013 \u0645\u0643\u062a\u0628\u0629 ACM \u0627\u0644\u0631\u0642\u0645\u064a\u0629<\/a><\/li>\n<\/ol>","protected":false},"featured_media":476391,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-476390","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>Concurrency Control: Managing Simultaneous Access for Efficient Proxy Server Operations<\/mark>","faq_items":[{"question":"What is Concurrency Control?","answer":"<p>Concurrency control is a crucial aspect of modern computing systems that manages simultaneous access to shared resources. It ensures that multiple users or processes can interact with these resources without causing conflicts or data inconsistencies. The primary goal of concurrency control is to maintain data integrity and consistency while optimizing performance and efficiency.<\/p>"},{"question":"How does Concurrency Control work?","answer":"<p>Concurrency control employs various techniques to manage concurrent access effectively. There are two main approaches:<\/p><ol><li><p>Pessimistic Concurrency Control: This approach uses lock-based mechanisms to prevent other users from accessing a resource while it is being used by a transaction. Lock types, such as shared and exclusive locks, help regulate access.<\/p><\/li><li><p>Optimistic Concurrency Control: In this approach, transactions proceed without blocking, and before committing, the system checks for conflicts to ensure data consistency. If a conflict is detected, the transaction is rolled back and repeated until successful.<\/p><\/li><\/ol>"},{"question":"Why is Concurrency Control important for Proxy Servers?","answer":"<p>Concurrency control is crucial for proxy servers as they act as intermediaries between clients and backend servers, handling multiple client requests simultaneously. Implementing concurrency control mechanisms allows proxy servers to efficiently manage these requests while ensuring data integrity and preventing conflicts. It optimizes resource utilization, enhances performance, and maintains system responsiveness.<\/p>"},{"question":"What are the common issues related to Concurrency Control?","answer":"<p>Common issues related to concurrency control include:<\/p><ol><li><p>Performance Overhead: Lock-based approaches may lead to contention, reducing system performance.<\/p><\/li><li><p>Deadlocks: Transactions waiting for each other's locks can result in deadlock situations where they are unable to proceed.<\/p><\/li><\/ol>"},{"question":"What are the future perspectives and technologies related to Concurrency Control?","answer":"<p>The future of concurrency control is likely to see developments such as:<\/p><ol><li><p>Advanced Lock-Free Algorithms: Research and development of lock-free and wait-free algorithms to minimize contention and improve performance.<\/p><\/li><li><p>Distributed Concurrency Control: Managing concurrency in distributed systems and cloud environments to handle scalability challenges.<\/p><\/li><li><p>Machine Learning Integration: Utilizing machine learning models to predict and optimize concurrency control mechanisms based on workloads and resource usage patterns.<\/p><\/li><\/ol>"},{"question":"How are Concurrency Control and Parallelism different?","answer":"<p>Concurrency control and parallelism serve different purposes:<\/p><ul><li><p>Concurrency Control: Focuses on managing concurrent access to resources to maintain data consistency in multi-user environments like databases and proxy servers.<\/p><\/li><li><p>Parallelism: Aims to achieve enhanced performance by simultaneously executing multiple CPU-intensive tasks.<\/p><\/li><\/ul>"},{"question":"Where can I find more information about Concurrency Control?","answer":"<p>For more in-depth information about Concurrency Control, you can explore the following resources:<\/p><ol><li><a href=\"https:\/\/en.wikipedia.org\/wiki\/Concurrency_control\" target=\"_new\">Concurrency Control in Databases - Wikipedia<\/a><\/li><li><a href=\"https:\/\/www.tutorialspoint.com\/dbms\/dbms_concurrency_control.htm\" target=\"_new\">Concurrency Control Techniques - Tutorialspoint<\/a><\/li><li><a href=\"https:\/\/www.oracle.com\/technical-resources\/articles\/database\/transaction-management-cdc.html\" target=\"_new\">A Comprehensive Guide to Concurrency Control in Database Systems - Oracle<\/a><\/li><li><a href=\"https:\/\/dl.acm.org\/doi\/10.1145\/3297858.3304027\" target=\"_new\">Concurrency Control in Proxy Servers - ACM Digital Library<\/a><\/li><\/ol>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/ar\/wp-json\/wp\/v2\/wiki\/476390","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/ar\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/ar\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/ar\/wp-json\/wp\/v2\/wiki\/476390\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/ar\/wp-json\/wp\/v2\/media\/476391"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/ar\/wp-json\/wp\/v2\/media?parent=476390"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}