{"id":10484,"date":"2021-10-07T08:54:30","date_gmt":"2021-10-07T08:54:30","guid":{"rendered":"https:\/\/www.thegioimaychu.vn\/blog\/?p=10484"},"modified":"2021-10-07T08:55:36","modified_gmt":"2021-10-07T08:55:36","slug":"cache-vs-tier-su-khac-biet-giua-bo-nho-cache-va-thanh-phan-luu-tru-la-gi","status":"publish","type":"post","link":"https:\/\/thegioimaychu.vn\/blog\/tong-hop\/cache-vs-tier-su-khac-biet-giua-bo-nho-cache-va-thanh-phan-luu-tru-la-gi-p10484\/","title":{"rendered":"Cache vs Tier: S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa b\u1ed9 nh\u1edb cache v\u00e0 th\u00e0nh ph\u1ea7n l\u01b0u tr\u1eef l\u00e0 g\u00ec?"},"content":{"rendered":"<style>.iblink{color:#975!important;}.iblink:hover{color:orange!important;}<\/style><p><em>C\u00f9ng xem x\u00e9t s\u1ef1 kh\u00e1c bi\u1ec7t ch\u00ednh gi\u1eefa b\u1ed9 nh\u1edb cache v\u00e0 <a class=\"iblink\" href=\"\/storage\/\">h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef<\/a> ph\u00e2n c\u1ea5p theo Tier, v\u00e0 n\u01a1i ranh gi\u1edbi \u0111\u00e3 tr\u1edf n\u00ean m\u1edd nh\u1ea1t v\u1edbi c\u00e1c lo\u1ea1i l\u01b0u tr\u1eef flash t\u1ed1c \u0111\u1ed9 cao, 3D Xpoint v\u00e0 c\u00e1c c\u00f4ng ngh\u1ec7 b\u1ed9 nh\u1edb \u1edf ph\u00e2n l\u1edbp l\u01b0u tr\u1eef (storage-class memory).<\/em><\/p>\n<p>S\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a\u00a0l\u01b0u tr\u1eef flash v\u00e0 s\u1ef1 x\u00e2m nh\u1eadp c\u1ee7a ch\u00fang v\u00e0o c\u00e1c c\u00f4ng ngh\u1ec7 trung t\u00e2m d\u1eef li\u1ec7u ch\u00ednh th\u1ed1ng \u0111\u00e3 mang \u0111\u1ebfn nh\u1eefng c\u00e2u h\u1ecfi v\u1ec1 n\u01a1i v\u00e0 c\u00e1ch th\u1ee9c ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng &#8211; v\u00e0 m\u1ed9t trong nh\u1eefng c\u00e2u h\u1ecfi l\u1edbn \u0111\u01b0\u1ee3c \u0111\u1eb7t ra l\u00e0 vi\u1ec7c s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ti\u1ec7n flash l\u00e0m\u00a0b\u1ed9 nh\u1edb \u0111\u1ec7m\u00a0v\u00e0 xem nh\u01b0 m\u1ed9t t\u1ea7ng (tier) l\u01b0u tr\u1eef.<\/p>\n<p>Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang t\u00f4i s\u1ebd c\u1ed1 g\u1eafng l\u00e0m r\u00f5 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa cache v\u00e0 tier, nh\u01b0ng c\u0169ng ch\u1ec9 ra nh\u1eefng n\u01a1i l\u1eb1ng ranh \u0111\u00f3 kh\u00f4ng c\u00f2n r\u00f5 r\u00e0ng n\u1eefa.<\/p>\n<p>B\u1ed9 nh\u1edb cache \u1edf ph\u1ea7n c\u1ee9ng t\u1ed3n t\u1ea1i \u1edf nhi\u1ec1u c\u1ea5p \u0111\u1ed9 trong h\u1ea1 t\u1ea7ng CNTT. \u0110i\u1ec1u \u0111\u00f3 l\u00e0 c\u1ea7n thi\u1ebft v\u00ec s\u1ef1 kh\u00f4ng t\u01b0\u01a1ng th\u00edch t\u1ed3n t\u1ea1i gi\u1eefa c\u00e1c th\u00e0nh ph\u1ea7n v\u1edbi nhau.\u00a0Theo thu\u1eadt ng\u1eef\u00a0input\/output (I\/O), m\u1ed9t s\u1ed1 th\u00e0nh ph\u1ea7n c\u1ee7a h\u1ea1 t\u1ea7ng CNTT kh\u00f4ng th\u1ec3 \u0111\u1ecdc ho\u1eb7c ghi nhanh nh\u01b0 nh\u1eefng th\u00e0nh ph\u1ea7n kh\u00e1c, v\u00ec v\u1eady c\u1ea7n c\u00f3 m\u1ed9t b\u1ed9 nh\u1edb \u0111\u1ec7m gi\u1eefa ch\u00fang \u0111\u1ec3 c\u00f3 th\u1ec3 x\u1eed l\u00fd d\u1eef li\u1ec7u \u0111i v\u00e0o v\u00e0 \u0111i ra nhanh h\u01a1n.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"866\" height=\"389\" class=\"alignnone wp-image-10494 size-full\" src=\"https:\/\/thegioimaychu.vn\/blog\/wp-content\/uploads\/2021\/10\/TheGioiMayChu-Blog-Image-cache-vs-tier-su-khac-biet-giua-bo-nho-cache-va-thanh-phan-luu-tru-la-gi.png\" srcset=\"https:\/\/thegioimaychu.vn\/blog\/wp-content\/uploads\/2021\/10\/TheGioiMayChu-Blog-Image-cache-vs-tier-su-khac-biet-giua-bo-nho-cache-va-thanh-phan-luu-tru-la-gi.png 866w, https:\/\/thegioimaychu.vn\/blog\/wp-content\/uploads\/2021\/10\/TheGioiMayChu-Blog-Image-cache-vs-tier-su-khac-biet-giua-bo-nho-cache-va-thanh-phan-luu-tru-la-gi-300x135.png 300w, https:\/\/thegioimaychu.vn\/blog\/wp-content\/uploads\/2021\/10\/TheGioiMayChu-Blog-Image-cache-vs-tier-su-khac-biet-giua-bo-nho-cache-va-thanh-phan-luu-tru-la-gi-768x345.png 768w, https:\/\/thegioimaychu.vn\/blog\/wp-content\/uploads\/2021\/10\/TheGioiMayChu-Blog-Image-cache-vs-tier-su-khac-biet-giua-bo-nho-cache-va-thanh-phan-luu-tru-la-gi-40x18.png 40w\" sizes=\"auto, (max-width: 866px) 100vw, 866px\" \/><\/p>\n<p>Ch\u1ee9c n\u0103ng thi\u1ebft y\u1ebfu c\u1ee7a n\u00f3 l\u00e0 cung c\u1ea5p m\u1ed9t v\u1ecb tr\u00ed c\u00f3 th\u1ec3 truy c\u1eadp nhanh ch\u00f3ng cho d\u1eef li\u1ec7u c\u1ea7n thi\u1ebft cho c\u00e1c ho\u1ea1t \u0111\u1ed9ng hi\u1ec7n \u0111ang ch\u1ea1y, ho\u1eb7c \u00edt nh\u1ea5t l\u00e0 nh\u1eefng ph\u1ea7n quan tr\u1ecdng nh\u1ea5t c\u1ee7a n\u00f3.<\/p>\n<p>B\u1ea1n c\u00f3 th\u1ec3 s\u1ebd th\u1ea5y s\u1ef1 \u0111a d\u1ea1ng c\u1ee7a c\u00e1c b\u1ed9 x\u1eed l\u00fd trung t\u00e2m (CPU) \u0111\u1eaft ti\u1ec1n v\u00e0 hi\u1ec7u su\u1ea5t cao nh\u1ea5t.\u00a0Sau \u0111\u00f3 &#8211; gi\u1ea3m b\u1edbt m\u1ed9t ch\u00fat v\u1ec1 hi\u1ec7u su\u1ea5t &#8211; s\u1ebd c\u00f3 RAM \u0111\u00f3ng vai tr\u00f2 nh\u01b0 m\u1ed9t ph\u1ea7n b\u1ed9 nh\u1edb c\u00f3 th\u1ec3 truy c\u1eadp nhanh h\u01a1n \u0111\u01b0\u1ee3c th\u00eam v\u00e0o ph\u1ea7n l\u1edbn c\u00e1c thanh DRAM tr\u00ean card.<\/p>\n<p>B\u00ean d\u01b0\u1edbi RAM c\u0169ng c\u00f3 th\u1ec3 c\u00f3 m\u1ed9t s\u1ed1\u00a0b\u1ed9 nh\u1edb l\u1edbp l\u01b0u tr\u1eef (storage class memory), m\u1eb7c d\u00f9 \u0111\u00e2y c\u00f3 th\u1ec3 l\u00e0 b\u1ed9 nh\u1edb cache ho\u1eb7c t\u1ea1o th\u00e0nh m\u1ed9t Tier, nh\u01b0 ch\u00fang ta s\u1ebd th\u1ea5y.<\/p>\n<p>Xa h\u01a1n trong s\u01a1 \u0111\u1ed3 ki\u1ebfn \u200b\u200btr\u00fac, c\u0169ng c\u00f3 th\u1ec3 c\u00f3 m\u1ed9t s\u1ed1 b\u1ed9 nh\u1edb cache tr\u00ean c\u00e1c b\u1ed9 l\u01b0u tr\u1eef dung l\u01b0\u1ee3ng l\u1edbn.\u00a0Cho d\u00f9 SSD hay \u1ed5 \u0111\u0129a quay HDD, th\u01b0\u1eddng c\u00f3 m\u1ed9t s\u1ed1 b\u1ed9 nh\u1edb \u0111\u1ec7m \u1edf \u0111\u00e2y \u0111\u1ec3, th\u1eadm ch\u00ed, t\u00e1ch ra kh\u1ecfi lu\u1ed3ng I\/O khi n\u00f3 ti\u1ebfp c\u1eadn v\u1edbi ph\u01b0\u01a1ng ti\u1ec7n l\u01b0u tr\u1eef s\u1ed1 l\u01b0\u1ee3ng l\u1edbn (bulk media).\u00a0\u0110i\u1ec1u n\u00e0y th\u1ef1c s\u1ef1 n\u1eb1m ngo\u00e0i ph\u1ea7n ch\u00ednh c\u1ee7a b\u00e0i vi\u1ebft n\u00e0y.\u00a0Tuy nhi\u00ean, b\u1ea5t c\u1ee9 n\u01a1i n\u00e0o n\u00f3 c\u01b0 tr\u00fa \u0111\u1ec1u c\u00f3 m\u1ed9t s\u1ed1 \u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh c\u1ea7n l\u01b0u \u00fd trong b\u1ed9 nh\u1edb cache.<\/p>\n<h3>Cache: L\u00e0 m\u1ed9t b\u1ea3n copy<\/h3>\n<p>\u0110i\u1ec1u quan tr\u1ecdng l\u00e0 n\u00f3 h\u1ea7u nh\u01b0 lu\u00f4n lu\u00f4n l\u00e0 m\u1ed9t b\u1ea3n copy.\u00a0\u0110\u00f3 l\u00e0 b\u1edfi v\u00ec ph\u1ea7n c\u1ee9ng hi\u1ec7u su\u1ea5t c\u1ef1c cao \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng th\u00ec h\u1ea7u nh\u01b0 r\u1ea5t d\u1ec5 bi\u1ebfn \u0111\u1ed9ng v\u00e0 d\u1eef li\u1ec7u s\u1ebd b\u1ecb m\u1ea5t n\u1ebfu ngu\u1ed3n \u0111i\u1ec7n b\u1ecb ng\u1eaft.<\/p>\n<p>H\u1ea7u h\u1ebft, d\u1eef li\u1ec7u s\u1ebd c\u00f3 th\u1ec3 \u0111\u1ecbnh \u0111\u1ecba ch\u1ec9 theo byte.\u00a0\u0110i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0 ph\u01b0\u01a1ng ti\u1ec7n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ghi \u0111\u1ebfn v\u00e0 \u0111i \u1edf c\u1ea5p \u0111\u1ed9 c\u1ee7a m\u1ed9t k\u00fd t\u1ef1 \u0111\u01a1n (single character).\u00a0\u0110\u00f3 l\u00e0\u00a0\u0111\u1eb7c \u0111i\u1ec3m ch\u00ednh c\u1ee7a b\u1ed9 nh\u1edb (memory), v\u00e0 gi\u00fap ph\u00e2n bi\u1ec7t n\u00f3 v\u1edbi b\u1ed9 l\u01b0u tr\u1eef (storage).<\/p>\n<p>Nh\u01b0ng trong khi \u0111\u00f3 l\u00e0 nh\u1eefng th\u1ee9 x\u00e1c \u0111\u1ecbnh b\u1ed9 nh\u1edb cache \u1edf c\u1ea5p \u0111\u1ed9 k\u1ef9 thu\u1eadt, v\u1ec1 c\u00e1ch n\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng, thu\u1ed9c t\u00ednh quan tr\u1ecdng c\u1ee7a n\u00f3 l\u00e0 cung c\u1ea5p v\u1ecb tr\u00ed t\u1ea1m th\u1eddi cho d\u1eef li\u1ec7u c\u00f3 th\u1ec3 c\u1ea7n \u0111\u01b0\u1ee3c truy c\u1eadp nhanh (ho\u1eb7c kh\u00f4ng th\u1ec3 ghi nhanh \u0111\u1ee7 \u0111\u1ebfn \u0111\u00edch cu\u1ed1i c\u00f9ng c\u1ee7a n\u00f3).<\/p>\n<p>Tr\u01b0\u1edbc ti\u00ean, ch\u00fang ta h\u00e3y xem x\u00e9t m\u1ed9t s\u1ed1 lo\u1ea1i b\u1ed9 nh\u1edb cache c\u01a1 b\u1ea3n<\/p>\n<h3 class=\"section-title\">Write-through, write-back, write-around cache<\/h3>\n<p>Lo\u1ea1i b\u1ed9 nh\u1edb \u0111\u1ec7m &#8211; n\u01a1i b\u1ea1n c\u00f3 th\u1ec3 \u0111\u1eb7t n\u00f3, ch\u1eb3ng h\u1ea1n nh\u01b0 t\u1eeb <a class=\"iblink\" href=\"\/storage\/\">h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef<\/a> ho\u1eb7c b\u00ean trong \u1ee9ng d\u1ee5ng &#8211; \u0111\u01b0\u1ee3c chia th\u00e0nh m\u1ed9t s\u1ed1 lo\u1ea1i ch\u00ednh.\u00a0Ch\u00fang bao g\u1ed3m:<\/p>\n<p class=\"section-title\"><strong>Write-through cache:<\/strong>\u00a0ghi \u0111\u1ed3ng th\u1eddi v\u00e0o ph\u01b0\u01a1ng ti\u1ec7n b\u1ed9 nh\u1edb \u0111\u1ec7m v\u00e0 b\u1ed9 nh\u1edb c\u1ed1 \u0111\u1ecbnh b\u00ean d\u01b0\u1edbi tr\u01b0\u1edbc khi x\u00e1c nh\u1eadn ho\u1ea1t \u0111\u1ed9ng v\u1edbi m\u00e1y ch\u1ee7.\u00a0\u1ede \u0111\u00e2y, d\u1eef li\u1ec7u r\u1ea5t an to\u00e0n v\u00ec n\u00f3 \u0111\u01b0\u1ee3c ghi v\u00e0o m\u1ed9t m\u1ea3ng l\u01b0u tr\u1eef \u0111\u01b0\u1ee3c chia s\u1ebb, nh\u01b0ng nh\u01b0\u1ee3c \u0111i\u1ec3m l\u00e0 I\/O ban \u0111\u1ea7u tr\u1ea3i qua \u0111\u1ed9 tr\u1ec5 d\u1ef1a tr\u00ean vi\u1ec7c ghi v\u00e0o b\u1ed9 nh\u1edb \u0111\u00f3.\u00a0N\u00f3 t\u1ed1t cho c\u00e1c tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng m\u00e0 d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c ghi v\u00e0 sau \u0111\u00f3 s\u1ebd \u0111\u01b0\u1ee3c \u0111\u1ecdc l\u1ea1i th\u01b0\u1eddng xuy\u00ean.<\/p>\n<p><strong>Write-around cache:<\/strong> ng\u01b0\u1ee3c l\u1ea1i, xem I \/ O \u0111\u01b0\u1ee3c ghi tr\u1ef1c ti\u1ebfp v\u00e0o b\u1ed9 l\u01b0u tr\u1eef d\u00e0i h\u1ea1n v\u00e0 b\u1ecf qua b\u1ed9 nh\u1edb cache.\u00a0\u0110i\u1ec1u n\u00e0y tr\u00e1nh \u0111\u01b0\u1ee3c \u0111\u1ed9 tr\u1ec5 khi ghi v\u00e0o b\u1ed9 nh\u1edb cache v\u00e0 l\u01b0u tr\u1eef d\u00e0i h\u1ea1n nh\u01b0ng n\u1ebfu d\u1eef li\u1ec7u c\u1ea7n thi\u1ebft ngay sau khi \u0111\u01b0\u1ee3c &#8220;committed&#8221; th\u00ec d\u1eef li\u1ec7u \u0111\u00f3 s\u1ebd ph\u1ea3i \u0111\u01b0\u1ee3c t\u00ecm n\u1ea1p t\u1eeb ph\u01b0\u01a1ng ti\u1ec7n h\u00e0ng lo\u1ea1t v\u00e0 b\u1ea1n c\u00f3 th\u1ec3 g\u1eb7p ph\u1ea3i t\u00ecnh tr\u1ea1ng \u201cb\u1ecf l\u1ee1 b\u1ed9 nh\u1edb cache\u201d.<\/p>\n<p><strong>Write-back cache:<\/strong> ghi I \/ O v\u00e0o b\u1ed9 nh\u1edb \u0111\u1ec7m v\u00e0 ngay l\u1eadp t\u1ee9c \u0111\u01b0\u1ee3c x\u00e1c nh\u1eadn v\u1edbi host.\u00a0D\u1eef li\u1ec7u sau \u0111\u00f3 \u0111\u01b0\u1ee3c chuy\u1ec3n sang bulk media sau \u0111\u00f3.\u00a0\u0110i\u1ec1u n\u00e0y mang l\u1ea1i\u00a0\u0111\u1ed9 tr\u1ec5 th\u1ea5p\u00a0v\u00e0 th\u00f4ng l\u01b0\u1ee3ng cao nh\u01b0ng c\u00f3 kh\u1ea3 n\u0103ng d\u1ec5 b\u1ecb m\u1ea5t d\u1eef li\u1ec7u v\u00ec trong m\u1ed9t s\u1ed1 kho\u1ea3ng th\u1eddi gian, d\u1eef li\u1ec7u ch\u1ec9 t\u1ed3n t\u1ea1i trong b\u1ed9 nh\u1edb cache.<\/p>\n<h3>Storage: Quy m\u00f4 l\u1edbn, \u0111\u1ecbnh \u0111\u1ecba ch\u1ec9 theo block v\u00e0 \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7<\/h3>\n<p>M\u1eb7c d\u00f9 b\u1ea1n c\u00f3 th\u1ec3 tranh lu\u1eadn r\u1eb1ng b\u1ea5t k\u1ef3 d\u1eef li\u1ec7u n\u00e0o \u0111\u01b0\u1ee3c l\u01b0u gi\u1eef tr\u00ean b\u1ea5t k\u1ef3 ph\u01b0\u01a1ng ti\u1ec7n n\u00e0o trong b\u1ea5t k\u1ef3 kho\u1ea3ng th\u1eddi gian n\u00e0o \u0111\u1ec1u t\u1ea1o th\u00e0nh m\u1ed9t d\u1ea1ng l\u01b0u tr\u1eef, nh\u01b0ng \u0111\u1ed1i v\u1edbi m\u1ee5c \u0111\u00edch c\u1ee7a ch\u00fang ta th\u00ec kh\u00f4ng ph\u1ea3i nh\u01b0 v\u1eady.<\/p>\n<p>B\u1ed9 nh\u1edb \u0111\u1ec7m \u0111\u01b0\u1ee3c ph\u00e2n bi\u1ec7t b\u1eb1ng c\u00e1ch n\u00f3 l\u00e0 m\u1ed9t b\u1ea3n sao t\u1ea1m th\u1eddi c\u1ee7a m\u1ed9t l\u01b0\u1ee3ng t\u01b0\u01a1ng \u0111\u1ed1i nh\u1ecf d\u1eef li\u1ec7u hi\u1ec7n \u0111ang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 truy c\u1eadp nhanh ho\u1eb7c \u0111\u1ec3 ghi v\u00e0o b\u1ed9 \u0111\u1ec7m.<\/p>\n<p>Ng\u01b0\u1ee3c l\u1ea1i, b\u1ed9 l\u01b0u tr\u1eef n\u1eb1m sau \/ b\u00ean d\u01b0\u1edbi b\u1ed9 nh\u1edb cache v\u00e0 cung c\u1ea5p v\u1ecb tr\u00ed l\u01b0u gi\u1eef h\u00e0ng lo\u1ea1t, l\u00e2u d\u00e0i cho d\u1eef li\u1ec7u v\u00e0 \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft theo kh\u1ed1i ch\u1ee9 kh\u00f4ng ph\u1ea3i byte.<\/p>\n<p>N\u00f3 c\u00f3 th\u1ec3 c\u00f3 nhi\u1ec1u \u0111\u1eb7c \u0111i\u1ec3m v\u1ec1 hi\u1ec7u su\u1ea5t v\u00e0 kh\u1ea3 n\u0103ng truy c\u1eadp &#8211; t\u1eeb <a class=\"iblink\" href=\"\/linh-kien-may-chu\/hdd\/\">\u1ed5 c\u1ee9ng HDD<\/a> quay t\u01b0\u01a1ng \u0111\u1ed1i ch\u1eadm \u0111\u1ebfn ph\u01b0\u01a1ng ti\u1ec7n flash c\u1ef1c nhanh.<\/p>\n<p>\u0110\u00f3 l\u00e0 c\u00e1ch x\u00e1c \u0111\u1ecbnh c\u00e1c c\u1ea5p l\u01b0u tr\u1eef.\u00a0V\u00ed d\u1ee5: n\u01a1i m\u1ed9t c\u00f4ng ty gi\u1eef ph\u1ea7n l\u1edbn d\u1eef li\u1ec7u c\u1ee7a m\u00ecnh tr\u00ean \u1ed5 \u0111\u0129a quay ch\u1eadm ch\u1ea1p, trong khi c\u00e1c ho\u1ea1t \u0111\u1ed9ng hi\u1ec7n t\u1ea1i ch\u1ea1y t\u1eeb l\u1edbp <a class=\"iblink\" href=\"\/linh-kien-may-chu\/ssd\/\">\u1ed5 c\u1ee9ng SSD<\/a> nhanh h\u01a1n.\u00a0V\u00e0 ph\u00e2n c\u1ea5p n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp \u0111\u1ec3 ch\u1ea1y t\u1ef1 \u0111\u1ed9ng, v\u1edbi d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c di chuy\u1ec3n v\u00e0o v\u00e0 ra kh\u1ecfi c\u00e1c c\u1ea5p ho\u1ea1t \u0111\u1ed9ng kh\u00e1c nhau t\u00f9y thu\u1ed9c v\u00e0o c\u1ea5u h\u00ecnh s\u1eed d\u1ee5ng.<\/p>\n<p>Ch\u00ednh s\u1ef1 gia t\u0103ng c\u1ee7a SSD \u1edf c\u1ea5p cao h\u01a1n c\u1ee7a t\u1ea7ng hi\u1ec7u su\u1ea5t \u0111\u00e3 th\u00fac \u0111\u1ea9y vi\u1ec7c xem x\u00e9t l\u1ea1i c\u00e1c \u0111\u1ecbnh ngh\u0129a n\u00e0y.<\/p>\n<p>C\u1ee5 th\u1ec3, vi\u1ec7c s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ti\u1ec7n flash nhanh nh\u01b0 m\u1ed9t l\u1edbp gi\u1eefa bulk storage v\u00e0 RAM \/ CPU c\u00f3 t\u1ea1o th\u00e0nh b\u1ed9 nh\u1edb cache kh\u00f4ng?\u00a0Hay n\u00f3 l\u00e0 m\u1ed9t c\u1ea5p l\u01b0u tr\u1eef?\u00a0C\u00e2u tr\u1ea3 l\u1eddi l\u00e0: &#8220;N\u00f3 t\u00f9y thu\u1ed9c v\u00e0o&#8230;&#8221;.<\/p>\n<p>H\u01a1n bao gi\u1edd h\u1ebft, c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng l\u1edbp hi\u1ec7u su\u1ea5t cao c\u1ee7a ph\u01b0\u01a1ng ti\u1ec7n l\u01b0u tr\u1eef SSD, ch\u1eb3ng h\u1ea1n nh\u01b0 NVMe\u00a0flash ho\u1eb7c 3D Xpoint, g\u1ea7n v\u1edbi n\u01a1i di\u1ec5n ra qu\u00e1 tr\u00ecnh x\u1eed l\u00fd.<\/p>\n<p>Nh\u01b0ng ph\u1ea7n l\u1edbn \u0111i\u1ec1u \u0111\u00f3 s\u1ebd t\u1ea1o th\u00e0nh m\u1ed9t t\u1ea7ng l\u01b0u tr\u1eef, cho d\u00f9 \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh Tier 1, Tier 0 hay b\u1ea5t c\u1ee9 Tier n\u00e0o.\u00a0\u0110\u00f3 l\u00e0 b\u1edfi v\u00ec n\u00f3 s\u1ebd l\u00e0 b\u1ed9 l\u01b0u tr\u1eef x\u00e1c \u0111\u1ecbnh theo block v\u00e0 n\u00f3 s\u1ebd kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t b\u1ea3n copy, ngo\u1ea1i tr\u1eeb vi\u1ec7c n\u00f3 \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 b\u1edfi\u00a0RAID\u00a0v\u00e0 \u0111\u01b0\u1ee3c sao l\u01b0u.<\/p>\n<p>L\u1eb1n ranh d\u01b0\u1eddng nh\u01b0 b\u1ecb m\u1edd \u0111i v\u1edbi b\u1ed9 nh\u1edb d\u1ea1ng storage class, c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ti\u1ec7n l\u01b0u tr\u1eef th\u1ec3 r\u1eafn nhanh Intel Optane, c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng \u1edf ch\u1ebf \u0111\u1ed9 \u0111\u1ecbnh \u0111\u1ecba ch\u1ec9 theo byte (v\u00e0 v\u00ec th\u1ebf n\u00f3 l\u00e0 b\u1ed9 nh\u1edb cache) ho\u1eb7c c\u00f3 th\u1ec3 \u0111\u1ecbnh \u0111\u1ecba ch\u1ec9 theo block (v\u00e0 do \u0111\u00f3 l\u00e0 th\u00e0nh ph\u1ea7n l\u01b0u tr\u1eef d\u00e0i h\u1ea1n).<\/p>\n<div>____<br \/><b>B\u00e0i vi\u1ebft li\u00ean quan<\/b><\/div>\n<ul>\n<li><a href=\"https:\/\/thegioimaychu.vn\/blog\/?post_type=post&#038;p=23349\">Ch\u1ea1y \u1ea3o h\u00f3a Proxmox tr\u00ean h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef h\u1ee3p nh\u1ea5t EonStor GS c\u1ee7a Infortrend<\/a><\/li>\n<li><a href=\"https:\/\/thegioimaychu.vn\/blog\/?post_type=post&#038;p=21626\">U.2 SSD: &#8220;Chi\u1ebfn binh&#8221; 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kh&aacute;c bi&#7879;t ch&iacute;nh gi&#7919;a b&#7897; nh&#7899; cache v&agrave; h&#7879; th&#7889;ng l&#432;u tr&#7919; ph&acirc;n c&#7845;p theo Tier, v&agrave; n&#417;i ranh gi&#7899;i &#273;&atilde; tr&#7903; n&ecirc;n m&#7901; nh&#7841;t v&#7899;i c&aacute;c lo&#7841;i l&#432;u tr&#7919; flash t&#7889;c &#273;&#7897; cao, 3D Xpoint v&agrave; c&aacute;c c&ocirc;ng ngh&#7879; b&#7897; nh&#7899; &#7903; ph&acirc;n l&#7899;p l&#432;u tr&#7919; (storage-class memory). S&#7921; ph&aacute;t&#8230;<\/p>\n","protected":false},"author":2,"featured_media":10485,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[162,1],"tags":[32],"class_list":["post-10484","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-giai-phap","category-tong-hop","tag-storage"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Cache vs Tier: S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa b\u1ed9 nh\u1edb cache v\u00e0 th\u00e0nh ph\u1ea7n l\u01b0u tr\u1eef l\u00e0 g\u00ec? - Blog | TheGioiMayChu<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/thegioimaychu.vn\/blog\/tong-hop\/cache-vs-tier-su-khac-biet-giua-bo-nho-cache-va-thanh-phan-luu-tru-la-gi-p10484\/\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"Cache vs Tier: S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa b\u1ed9 nh\u1edb cache v\u00e0 th\u00e0nh ph\u1ea7n l\u01b0u tr\u1eef l\u00e0 g\u00ec? - Blog | TheGioiMayChu\" \/>\n<meta name=\"twitter:description\" content=\"C&ugrave;ng xem x&eacute;t s&#7921; kh&aacute;c bi&#7879;t ch&iacute;nh gi&#7919;a b&#7897; nh&#7899; cache v&agrave; h&#7879; th&#7889;ng l&#432;u tr&#7919; ph&acirc;n c&#7845;p theo Tier, v&agrave; n&#417;i ranh gi&#7899;i &#273;&atilde; tr&#7903; n&ecirc;n m&#7901; nh&#7841;t v&#7899;i c&aacute;c lo&#7841;i l&#432;u tr&#7919; flash t&#7889;c &#273;&#7897; cao, 3D Xpoint v&agrave; c&aacute;c c&ocirc;ng ngh&#7879; b&#7897; nh&#7899; &#7903; ph&acirc;n l&#7899;p l&#432;u tr&#7919; (storage-class memory). 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