{"id":55635,"date":"2022-08-05T00:00:00","date_gmt":"2022-08-04T17:00:00","guid":{"rendered":"https:\/\/wiki.tino.org\/staging\/?p=55635"},"modified":"2022-08-05T13:43:39","modified_gmt":"2022-08-05T06:43:39","slug":"nvme-la-gi","status":"publish","type":"post","link":"https:\/\/tino.vn\/blog\/nvme-la-gi\/","title":{"rendered":"NVMe l\u00e0 g\u00ec? T\u00ecm hi\u1ec3u chi ti\u1ebft v\u1ec1 \u1ed5 c\u1ee9ng SSD NVMe"},"content":{"rendered":"\n

V\u1edbi nhu c\u1ea7u l\u01b0u tr\u1eef d\u1eef li\u1ec7u ng\u00e0y c\u00e0ng t\u0103ng, \u1ed5 c\u1ee9ng SSD<\/a> \u0111ang l\u00e0 c\u00f4ng c\u1ee5 h\u1eefu \u00edch \u0111\u1ec3 n\u00e2ng cao ch\u1ea5t l\u01b0\u1ee3ng s\u1eed d\u1ee5ng m\u00e1y t\u00ednh. M\u1ed9t trong s\u1ed1 nh\u1eefng lo\u1ea1i SSD \u0111\u01b0\u1ee3c c\u00e1c doanh nghi\u1ec7p quan t\u00e2m hi\u1ec7n nay l\u00e0 NVMe. NVMe c\u00f3 th\u1ec3 gi\u00fap kh\u1eafc ph\u1ee5c nh\u1eefng h\u1ea1n ch\u1ebf m\u00e0 c\u00e1c phi\u00ean b\u1ea3n tr\u01b0\u1edbc \u0111\u00f3 g\u1eb7p ph\u1ea3i. V\u1eady c\u1ee5 th\u1ec3 NVMe l\u00e0 g\u00ec? Ch\u00fang ta h\u00e3y c\u00f9ng t\u00ecm hi\u1ec3u chi ti\u1ebft qua b\u00e0i vi\u1ebft sau \u0111\u00e2y nh\u00e9!<\/strong><\/p>\n\n\n\n

T\u1ed5ng quan v\u1ec1 NVMe<\/strong><\/h2>\n\n\n\n

NVMe l\u00e0 g\u00ec?<\/strong><\/h3>\n\n\n\n

NVMe l\u00e0 phi\u00ean b\u1ea3n SSD ra \u0111\u1eddi v\u00e0o n\u0103m 2013. NVMe l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a Non-Volatile Memory Express<\/strong>. Trong \u0111\u00f3:<\/p>\n\n\n\n

Non-Volatile (t\u1ea1m d\u1ecbch: B\u1ea5t bi\u1ebfn<\/em>) ngh\u0129a l\u00e0 b\u1ed9 nh\u1edb n\u00e0y s\u1ebd kh\u00f4ng b\u1ecb x\u00f3a khi m\u00e1y t\u00ednh c\u1ee7a b\u1ea1n kh\u1edfi \u0111\u1ed9ng l\u1ea1i.<\/p>\n\n\n\n

Express (t\u1ea1m d\u1ecbch: T\u1ed1c \u0111\u1ed9 cao<\/em>) \u0111\u1ec1 c\u1eadp \u0111\u1ebfn d\u1eef li\u1ec7u s\u1ebd \u0111\u01b0\u1ee3c truy\u1ec1n qua PCI Express (giao di\u1ec7n PCIe) tr\u00ean bo m\u1ea1ch ch\u1ee7 m\u00e1y t\u00ednh c\u1ee7a b\u1ea1n. \u0110i\u1ec1u n\u00e0y mang l\u1ea1i cho \u1ed5 c\u1ee9ng NVMe m\u1ed9t k\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp t\u1edbi bo m\u1ea1ch ch\u1ee7 v\u00ec d\u1eef li\u1ec7u s\u1ebd kh\u00f4ng ph\u1ea3i chuy\u1ec3n qua b\u1ed9 \u0111i\u1ec1u khi\u1ec3n Serial Advanced Technology Attachment (SATA). Nh\u1edd v\u1eady, t\u1ed1c \u0111\u1ed9 truy\u1ec1n t\u1ea3i c\u0169ng s\u1ebd nhanh h\u01a1n.<\/p>\n\n\n\n

V\u00ec \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1eb7c bi\u1ec7t cho \u1ed5 c\u1ee9ng SSD, NVMe \u0111ang tr\u1edf th\u00e0nh ti\u00eau chu\u1ea9n cho m\u00e1y ch\u1ee7 trong trung t\u00e2m d\u1eef li\u1ec7u v\u00e0 c\u00e1c thi\u1ebft b\u1ecb kh\u00e1ch nh\u01b0 laptop, PC v\u00e0 th\u1eadm ch\u00ed c\u1ea3 m\u00e1y ch\u01a1i game th\u1ebf h\u1ec7 ti\u1ebfp theo.<\/p>\n\n\n

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\"nvme-la-gi\"<\/figure>\n<\/div>\n\n\n

T\u1ea1i sao NVMe ra \u0111\u1eddi?<\/strong><\/h3>\n\n\n\n

Nhi\u1ec1u \u1ed5 c\u1ee9ng SSD g\u1eb7p ph\u1ea3i m\u1ed9t v\u1ea5n \u0111\u1ec1 v\u1ec1 hi\u1ec7u n\u0103ng do \u0111a s\u1ed1 ch\u00fang v\u1eabn \u0111ang s\u1eed d\u1ee5ng SATA v\u00e0 giao th\u1ee9c m\u1ea1ch \u0111i\u1ec1u khi\u1ec3n AHCI – m\u1ed9t chu\u1ea9n \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng \u0111\u1ec3 ph\u1ee5c v\u1ee5 cho vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u c\u1ee7a c\u1ee7a \u1ed5 HDD truy\u1ec1n th\u1ed1ng.<\/p>\n\n\n\n

Ch\u00ednh v\u00ec v\u1eady, m\u1eb7c d\u00f9 c\u00e1c lo\u1ea1i SSD n\u00e0y c\u00f3 kh\u1ea3 n\u0103ng \u0111\u1ecdc ghi \u1edf t\u1ed1c \u0111\u1ed9 cao nh\u1eefng v\u1eabn b\u1ecb t\u00ecnh tr\u1ea1ng “th\u1eaft c\u1ed5 chai” (bottleneck)\u201d do b\u0103ng th\u00f4ng th\u1ea5p c\u1ea3n tr\u1edf vi\u1ec7c truy\u1ec1n d\u1eef li\u1ec7u l\u1edbn. H\u01a1n n\u1eefa, m\u1ed7i \u1ed5 SATA c\u1ea7n c\u00f3 c\u1ed5ng ri\u00eang trong bo m\u1ea1ch ch\u1ee7. \u0110i\u1ec1u n\u00e0y l\u00e0m gi\u1edbi h\u1ea1n v\u1ec1 s\u1ed1 l\u01b0\u1ee3ng h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c k\u1ebft n\u1ed1i v\u1edbi thi\u1ebft b\u1ecb.<\/p>\n\n\n\n

\u1ede m\u1ed9t s\u1ed1 d\u00f2ng SSD cao c\u1ea5p sau n\u00e0y, m\u1eb7c d\u00f9 \u0111\u00e3 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 t\u1eadn d\u1ee5ng t\u1ed1c \u0111\u1ed9 c\u1ee7a PCI Express (PCIe) nh\u01b0ng vi\u1ec7c ti\u1ebfp t\u1ee5c s\u1eed d\u1ee5ng giao ti\u1ebfp AHCI \u0111\u00e3 khi\u1ebfn ch\u00fang kh\u00f4ng th\u1ec3 khai th\u00e1c \u0111\u1ee7 \u0111\u1ea7y s\u1ee9c m\u1ea1nh c\u1ee7a PCIe. \u0110\u1ebfn th\u1ebf h\u1ec7 PCIe th\u1ee9 3, t\u00ecnh tr\u1ea1ng bottleneck c\u00e0ng tr\u1edf n\u00ean nghi\u00eam tr\u1ecdng h\u01a1n.<\/p>\n\n\n\n

Nh\u1eadn th\u1ee9c \u0111\u01b0\u1ee3c \u0111i\u1ec1u \u0111\u00f3, c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u00e3 ph\u00e1t tri\u1ec3n NVMe \u0111\u1ec3 thay th\u1ebf AHCI nh\u1eb1m lo\u1ea1i b\u1ecf nh\u1eefng h\u1ea1n ch\u1ebf c\u1ee7a SSD v\u00e0 t\u0103ng hi\u1ec7u n\u0103ng \u0111\u00e1ng k\u1ec3.<\/p>\n\n\n\n

NVMe cho ph\u00e9p SSD k\u1ebft n\u1ed1i tr\u1ef1c ti\u1ebfp v\u1edbi CPU<\/a> th\u00f4ng qua bus PCIe \u0111\u1ec3 truy\u1ec1n d\u1eef li\u1ec7u qua c\u00e1c l\u00e0n t\u1ed1c \u0111\u1ed9 cao. M\u1ed9t l\u00e0n PCIe th\u1ebf h\u1ec7 th\u1ee9 4 c\u00f3 th\u1ec3 truy\u1ec1n d\u1eef li\u1ec7u l\u00ean \u0111\u1ebfn 2.000 Mbps, trong khi NVMe s\u1eed d\u1ee5ng t\u1ed1i \u0111a 4 l\u00e0n PCIe.<\/p>\n\n\n

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\"nvme-la-gi\"<\/figure>\n<\/div>\n\n\n

\u01afu \u0111i\u1ec3m c\u1ee7a NVMe<\/strong><\/h3>\n\n\n\n