{"id":2408,"date":"2024-07-24T23:18:01","date_gmt":"2024-07-24T23:18:01","guid":{"rendered":"https:\/\/tastycounter.net\/index.php\/2024\/07\/24\/su-co-may-tinh-toan-cau-tiep-theo-duoc-du-doan-se-xay-ra-vao-nam-2038\/"},"modified":"2024-07-24T23:18:01","modified_gmt":"2024-07-24T23:18:01","slug":"su-co-may-tinh-toan-cau-tiep-theo-duoc-du-doan-se-xay-ra-vao-nam-2038","status":"publish","type":"post","link":"https:\/\/tastycounter.net\/index.php\/2024\/07\/24\/su-co-may-tinh-toan-cau-tiep-theo-duoc-du-doan-se-xay-ra-vao-nam-2038\/","title":{"rendered":"S\u1ef1 c\u1ed1 m\u00e1y t\u00ednh to\u00e0n c\u1ea7u ti\u1ebfp theo \u0111\u01b0\u1ee3c d\u1ef1 \u0111o\u00e1n s\u1ebd x\u1ea3y ra v\u00e0o n\u0103m 2038"},"content":{"rendered":"<\/p>\n
\n

Do m\u1ed9t l\u1ed7i l\u1eadp tr\u00ecnh t\u1eeb n\u0103m 1970, m\u1ed9t s\u1ef1 c\u1ed1 m\u00e1y t\u00ednh to\u00e0n c\u1ea7u ti\u1ebfp theo khi\u1ebfn t\u1ea5t c\u1ea3 c\u00e1c thi\u1ebft b\u1ecb s\u1eed d\u1ee5ng n\u1ec1n t\u1ea3ng 32-bit s\u1ebd g\u1eb7p s\u1ef1 c\u1ed1 \u0111\u00e3 \u0111\u01b0\u1ee3c d\u1ef1 \u0111o\u00e1n x\u1ea3y ra v\u00e0o n\u0103m 2038, v\u1edbi t\u00ean g\u1ecdi Y2K38 hay Y2038.<\/p>\n

Nguy\u00ean nh\u00e2n l\u00e0 do c\u00e1ch c\u00e1c ph\u1ea7n m\u1ec1m \u0111\u01b0\u1ee3c l\u1eadp tr\u00ecnh \u0111\u1ec3 x\u1eed l\u00fd th\u00f4ng tin th\u1eddi gian n\u00ean c\u00e1c ph\u1ea7n m\u1ec1m s\u1eed d\u1ee5ng h\u1ec7 s\u1ed1 nguy\u00ean 32-bit \u0111\u1ec3 l\u01b0u tr\u1eef c\u00e1c th\u00f4ng tin v\u1ec1 th\u1eddi gian s\u1ebd b\u1ecb \u1ea3nh h\u01b0\u1edfng.<\/p>\n

\"Y2K38\"<\/p>\n

V\u00e0o nh\u1eefng n\u0103m 1970, khi c\u00e1c l\u1eadp tr\u00ecnh vi\u00ean ph\u00e1t tri\u1ec3n h\u1ec7 \u0111i\u1ec1u h\u00e0nh m\u00e1y t\u00ednh UNIX \u0111\u1ea7u ti\u00ean \u0111\u00e3 quy\u1ebft \u0111\u1ecbnh s\u1eed d\u1ee5ng s\u1ed1 nguy\u00ean 32-bit \u0111\u1ec3 \u0111o l\u01b0\u1eddng th\u1eddi gian, b\u1eaft \u0111\u1ea7u t\u1eeb ng\u00e0y 1\/1\/1970. Nhi\u1ec1u ph\u1ea7n m\u1ec1m v\u00e0 ph\u1ea7n c\u1ee9ng \u0111\u00e3 \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p h\u1ec7 th\u1ed1ng n\u00e0y.<\/p>\n

Tuy nhi\u00ean, h\u1ec7 s\u1ed1 nguy\u00ean 32-bit ch\u1ec9 c\u00f3 th\u1ec3 l\u01b0u tr\u1eef gi\u00e1 tr\u1ecb t\u1ed1i \u0111a l\u00e0 2.147.483.647. N\u00ean v\u00e0o 2.147.483.647 gi\u00e2y sau ng\u00e0y 1\/1\/1970, t\u1ee9c l\u00e0 v\u00e0o ng\u00e0y 19\/1\/2038, gi\u00e1 tr\u1ecb n\u00e0y s\u1ebd b\u1ecb v\u01b0\u1ee3t qua. T\u1ea5t c\u1ea3 c\u00e1c h\u1ec7 th\u1ed1ng 32-bit c\u00f3 th\u1ec3 quay tr\u1edf l\u1ea1i gi\u00e1 tr\u1ecb 0, d\u1eabn \u0111\u1ebfn vi\u1ec7c ch\u00fang m\u1eb7c \u0111\u1ecbnh hi\u1ec3n th\u1ecb th\u1eddi gian hi\u1ec7n t\u1ea1i l\u00e0 n\u0103m 1970, n\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c s\u1eeda ch\u1eefa k\u1ecbp th\u1eddi.<\/p>\n

Theo gi\u00e1o s\u01b0 Jonathan Smith t\u1eeb Khoa M\u00e1y t\u00ednh v\u00e0 Khoa h\u1ecdc Th\u00f4ng tin c\u1ee7a \u0110\u1ea1i h\u1ecdc Pennsylvania, v\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt, vi\u1ec7c s\u1eeda ch\u1eefa l\u1ed7i n\u00e0y kh\u00f4ng qu\u00e1 kh\u00f3 kh\u0103n nh\u01b0ng do ph\u1ea1m vi \u1ea3nh h\u01b0\u1edfng r\u1ea5t r\u1ed9ng l\u1edbn n\u00ean s\u1ebd t\u1ed1n nhi\u1ec1u th\u1eddi gian.<\/p>\n

S\u1ef1 c\u1ed1 n\u00e0y \u0111\u01b0\u1ee3c cho l\u00e0 c\u00f3 \u0111i\u1ec3m t\u01b0\u01a1ng \u0111\u1ed3ng v\u1edbi “s\u1ef1 c\u1ed1 Y2K<\/a>,” m\u1ed9t s\u1ef1 c\u1ed1 m\u00e1y t\u00ednh x\u1ea3y ra v\u00e0o th\u1eddi \u0111i\u1ec3m chuy\u1ec3n giao gi\u1eefa hai thi\u00ean ni\u00ean k\u1ef7 (t\u1ee9c th\u1eddi \u0111i\u1ec3m n\u0103m 1999 – 2000) do c\u00e1c m\u00e1y t\u00ednh c\u0169 ch\u1ec9 \u0111\u01b0\u1ee3c l\u1eadp tr\u00ecnh \u0111\u1ec3 nh\u1eadn di\u1ec7n hai ch\u1eef s\u1ed1 cu\u1ed1i c\u00f9ng c\u1ee7a n\u0103m, khi\u1ebfn ch\u00fang kh\u00f4ng th\u1ec3 ph\u00e2n bi\u1ec7t r\u00f5 r\u00e0ng gi\u1eefa c\u00e1c n\u0103m 2000 v\u00e0 1900.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Do m\u1ed9t l\u1ed7i l\u1eadp tr\u00ecnh t\u1eeb n\u0103m 1970, m\u1ed9t s\u1ef1 c\u1ed1 m\u00e1y t\u00ednh to\u00e0n c\u1ea7u ti\u1ebfp theo khi\u1ebfn t\u1ea5t c\u1ea3 c\u00e1c thi\u1ebft b\u1ecb s\u1eed d\u1ee5ng n\u1ec1n t\u1ea3ng 32-bit s\u1ebd g\u1eb7p s\u1ef1 c\u1ed1 \u0111\u00e3 \u0111\u01b0\u1ee3c d\u1ef1 \u0111o\u00e1n x\u1ea3y ra v\u00e0o n\u0103m 2038, v\u1edbi t\u00ean g\u1ecdi Y2K38 hay Y2038. Nguy\u00ean nh\u00e2n l\u00e0 do c\u00e1ch c\u00e1c ph\u1ea7n m\u1ec1m […]<\/p>\n","protected":false},"author":1,"featured_media":2409,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-2408","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-khong-phan-loai"],"_links":{"self":[{"href":"https:\/\/tastycounter.net\/index.php\/wp-json\/wp\/v2\/posts\/2408","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tastycounter.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tastycounter.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tastycounter.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tastycounter.net\/index.php\/wp-json\/wp\/v2\/comments?post=2408"}],"version-history":[{"count":0,"href":"https:\/\/tastycounter.net\/index.php\/wp-json\/wp\/v2\/posts\/2408\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tastycounter.net\/index.php\/wp-json\/wp\/v2\/media\/2409"}],"wp:attachment":[{"href":"https:\/\/tastycounter.net\/index.php\/wp-json\/wp\/v2\/media?parent=2408"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tastycounter.net\/index.php\/wp-json\/wp\/v2\/categories?post=2408"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tastycounter.net\/index.php\/wp-json\/wp\/v2\/tags?post=2408"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}