{"id":10662,"date":"2021-11-09T01:57:58","date_gmt":"2021-11-09T01:57:58","guid":{"rendered":"https:\/\/www.thegioimaychu.vn\/blog\/?p=10662"},"modified":"2022-03-09T01:43:56","modified_gmt":"2022-03-09T01:43:56","slug":"do-tre-latency-thong-so-quan-trong-nhat-trong-he-thong-luu-tru","status":"publish","type":"post","link":"https:\/\/thegioimaychu.vn\/blog\/ao-hoa\/do-tre-latency-thong-so-quan-trong-nhat-trong-he-thong-luu-tru-p10662\/","title":{"rendered":"\u0110\u1ed9 tr\u1ec5 \u2013 Latency: Th\u00f4ng s\u1ed1 quan tr\u1ecdng nh\u1ea5t trong h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef"},"content":{"rendered":"<style>.iblink{color:#975!important;}.iblink:hover{color:orange!important;}<\/style><h1>Kh\u00e1i ni\u1ec7m Latency<\/h1>\n<p><span data-offset-key=\"6bvdj-0-0\">Latency l\u00e0 kh\u00e1i ni\u1ec7m v\u1ec1 t\u1ed1c \u0111\u1ed9 x\u1eed l\u00fd m\u1ed9t request I\/O c\u1ee7a h\u1ec7 th\u1ed1ng. Kh\u00e1i ni\u1ec7m n\u00e0y r\u1ea5t quan tr\u1ecdng b\u1edfi v\u00ec m\u1ed9t <a class=\"iblink\" href=\"\/storage\/\">h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef<\/a> m\u1eb7c d\u00f9 ch\u1ec9 c\u00f3 1000 IOPS v\u1edbi th\u1eddi gian x\u1eed l\u00fd <\/span><span data-offset-key=\"6bvdj-1-0\">trung<\/span><span data-offset-key=\"6bvdj-2-0\"> b\u00ecnh c\u00f3 latency 10ms, v\u1eabn c\u00f3 th\u1ec3 t\u1ed1t h\u01a1n m\u1ed9t h\u1ec7 th\u1ed1ng v\u1edbi 5000 IOPS nh\u01b0ng latency l\u00e0 50ms. \u0110\u1eb7c bi\u1ec7t \u0111\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng \u201cnh\u1ea1y c\u1ea3m\u201d v\u1edbi latency, ch\u1eb3ng h\u1ea1n nh\u01b0 d\u1ecbch v\u1ee5 Database.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"1622\" height=\"827\" class=\"alignnone wp-image-10663 size-full\" src=\"https:\/\/thegioimaychu.vn\/blog\/wp-content\/uploads\/2021\/11\/TheGioiMayChu-Blog-Image-.png\" srcset=\"https:\/\/thegioimaychu.vn\/blog\/wp-content\/uploads\/2021\/11\/TheGioiMayChu-Blog-Image-.png 1622w, https:\/\/thegioimaychu.vn\/blog\/wp-content\/uploads\/2021\/11\/TheGioiMayChu-Blog-Image--300x153.png 300w, https:\/\/thegioimaychu.vn\/blog\/wp-content\/uploads\/2021\/11\/TheGioiMayChu-Blog-Image--768x392.png 768w, https:\/\/thegioimaychu.vn\/blog\/wp-content\/uploads\/2021\/11\/TheGioiMayChu-Blog-Image--1024x522.png 1024w, https:\/\/thegioimaychu.vn\/blog\/wp-content\/uploads\/2021\/11\/TheGioiMayChu-Blog-Image--40x20.png 40w\" sizes=\"auto, (max-width: 1622px) 100vw, 1622px\" \/><\/p>\n<p>L\u1ea5y\u00a0v\u00ed d\u1ee5 th\u1ef1c t\u1ebf, trong m\u1ed9t si\u00eau th\u1ecb, n\u1ebfu nh\u01b0 c\u00e1c thu ng\u00e2n (\u1ed5 c\u1ee9ng) ph\u1ee5c v\u1ee5 cho c\u00e1c kh\u00e1ch h\u00e0ng (I\/O) v\u1edbi th\u1eddi gian latency l\u00e0 10ms. V\u1eady n\u00f4m na, c\u00f3 th\u1ec3 hi\u1ec3u r\u1eb1ng thu ng\u00e2n n\u00e0y ph\u1ee5c v\u1ee5 100 kh\u00e1ch\/1 gi\u00e2y. Tuy nhi\u00ean, n\u1ebfu c\u00f3 th\u1eddi \u0111i\u1ec3m 100 kh\u00e1ch n\u00e0y t\u1edbi c\u00f9ng m\u1ed9t l\u00fac trong v\u00f2ng 10ms th\u00ec sao? Kh\u00e1ch h\u00e0ng s\u1ebd ph\u1ea3i \u0111\u1ee9ng \u0111\u1ee3i. V\u00e0 c\u0169ng tu\u1ef3 t\u1eebng nhu c\u1ea7u kh\u00e1ch h\u00e0ng (size I\/O) m\u00e0 latency c\u00f3 th\u1ec3 kh\u00e1c nhau, 15ms ho\u1eb7c th\u1eadm ch\u00ed 20ms.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"1037\" height=\"777\" class=\"alignnone wp-image-10664 size-full\" src=\"https:\/\/thegioimaychu.vn\/blog\/wp-content\/uploads\/2021\/11\/TheGioiMayChu-Blog-Image-1-1.png\" srcset=\"https:\/\/thegioimaychu.vn\/blog\/wp-content\/uploads\/2021\/11\/TheGioiMayChu-Blog-Image-1-1.png 1037w, https:\/\/thegioimaychu.vn\/blog\/wp-content\/uploads\/2021\/11\/TheGioiMayChu-Blog-Image-1-1-300x225.png 300w, https:\/\/thegioimaychu.vn\/blog\/wp-content\/uploads\/2021\/11\/TheGioiMayChu-Blog-Image-1-1-768x575.png 768w, https:\/\/thegioimaychu.vn\/blog\/wp-content\/uploads\/2021\/11\/TheGioiMayChu-Blog-Image-1-1-1024x767.png 1024w, https:\/\/thegioimaychu.vn\/blog\/wp-content\/uploads\/2021\/11\/TheGioiMayChu-Blog-Image-1-1-40x30.png 40w\" sizes=\"auto, (max-width: 1037px) 100vw, 1037px\" \/><\/p>\n<p>H\u00ecnh minh ho\u1ea1 sau s\u1ebd cho c\u00e1c b\u1ea1n th\u1ea5y t\u1ea1i sao khi \u1ed5 c\u1ee9ng t\u0103ng IOPS l\u1ea1i t\u1ed1n latecy cao h\u01a1n. S\u1ef1 th\u1eadt l\u00e0 <a class=\"iblink\" href=\"\/storage\/\">h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef<\/a> s\u1ebd nh\u00ecn v\u00e0o h\u00e0ng \u0111\u1ee3i (queu) v\u00e0 ra l\u1ec7nh x\u1eed l\u00fd tu\u1ea7n t\u1ef1 cho c\u00e1c I\/O, d\u1eabn \u0111\u1ebfn n\u1ebfu h\u00e0ng \u0111\u1ee3i d\u00e0i h\u01a1n th\u00ec latency s\u1ebd cao h\u01a1n, t\u00f9y thu\u1ed9c v\u00e0o hi\u1ec7u n\u0103ng y\u00eau c\u1ea7u c\u1ee7a \u1ee9ng d\u1ee5ng m\u00e0 ch\u00fang ta c\u00f3 th\u1ec3 ch\u1ea5p nh\u1eadn chuy\u1ec7n n\u00e0y hay kh\u00f4ng.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"1162\" height=\"1080\" class=\"alignnone wp-image-10665 size-full\" src=\"https:\/\/thegioimaychu.vn\/blog\/wp-content\/uploads\/2021\/11\/TheGioiMayChu-Blog-Image-1-2.png\" srcset=\"https:\/\/thegioimaychu.vn\/blog\/wp-content\/uploads\/2021\/11\/TheGioiMayChu-Blog-Image-1-2.png 1162w, https:\/\/thegioimaychu.vn\/blog\/wp-content\/uploads\/2021\/11\/TheGioiMayChu-Blog-Image-1-2-300x279.png 300w, https:\/\/thegioimaychu.vn\/blog\/wp-content\/uploads\/2021\/11\/TheGioiMayChu-Blog-Image-1-2-768x714.png 768w, https:\/\/thegioimaychu.vn\/blog\/wp-content\/uploads\/2021\/11\/TheGioiMayChu-Blog-Image-1-2-1024x952.png 1024w, https:\/\/thegioimaychu.vn\/blog\/wp-content\/uploads\/2021\/11\/TheGioiMayChu-Blog-Image-1-2-40x37.png 40w\" sizes=\"auto, (max-width: 1162px) 100vw, 1162px\" \/><\/p>\n<h1>IOPS vs Latency: Y\u1ebfu t\u1ed1 n\u00e0o quy\u1ebft \u0111\u1ecbnh hi\u1ec7u n\u0103ng h\u1ec7 th\u1ed1ng Storage?<\/h1>\n<p>\u0110\u1ec3 so s\u00e1nh \u0111\u01b0\u1ee3c hi\u1ec7u qu\u1ea3 h\u1ec7 th\u1ed1ng storage, c\u00e1c y\u1ebfu t\u1ed1 v\u1ec1 m\u00f4i tr\u01b0\u1eddng platform v\u00e0 \u1ee9ng d\u1ee5ng c\u1ea7n ph\u1ea3i gi\u1ed1ng nhau. \u0110i\u1ec1u n\u00e0y r\u1ea5t kh\u00f3, v\u00ec h\u1ec7 th\u1ed1ng c\u1ee7a doanh nghi\u1ec7p c\u1ea7n ph\u1ea3i ch\u1ea1y multi-workload.<\/p>\n<p>Trong m\u1ed9t v\u00e0i tr\u01b0\u1eddng h\u1ee3p, vi\u1ec7c x\u1eed l\u00fd\/transfer 1 l\u01b0\u1ee3ng l\u1edbn data (high throughput) th\u00ec \u0111\u01b0\u1ee3c xem l\u00e0 t\u1ed1t, nh\u01b0ng khi c\u1ea7n x\u1eed l\u00fd s\u1ed1 l\u01b0\u1ee3ng l\u1edbn c\u00e1c I\/O nh\u1ecf th\u1eadt nhanh (c\u1ea7n nhi\u1ec1u IOPS) th\u00ec ch\u01b0a ch\u1eafc, v\u00e0 ng\u01b0\u1ee3c l\u1ea1i. L\u00fac n\u00e0y k\u00edch c\u1ee1 I\/O, \u0111\u1ed9 d\u00e0i c\u1ee7a h\u00e0ng \u0111\u1ee3i (queue depth) v\u00e0 m\u1ee9c \u0111\u1ed9 x\u1eed l\u00fd song song\u2026 \u0111\u1ec1u c\u00f3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u n\u0103ng IOPS.<\/p>\n<p>C\u00f3 l\u1ebd h\u1ec7 th\u1ed1ng s\u1eed d\u1ee5ng c\u00e1c <a class=\"iblink\" href=\"\/linh-kien-may-chu\/hdd\/\">\u1ed5 c\u1ee9ng HDD<\/a> hay SSD hi\u1ec7n nay th\u00ec t\u1ed1c \u0111\u1ed9 \u0111\u00e3 qu\u00e1 cao r\u1ed3i, khi \u0111\u1ee9ng ri\u00eang l\u1ebb 1 m\u00ecnh, con s\u1ed1 n\u00e0y tr\u1edf n\u00ean v\u00f4 \u00edch. V\u00e0 v\u00f4 h\u00ecnh chung n\u00f3 tr\u1edf th\u00e0nh 1 thu\u1eadt ng\u1eef \u0111\u1ec3 c\u00e1c nh\u00e0 s\u1ea3n xu\u1ea5t ti\u1ebfp th\u1ecb cho thi\u1ebft b\u1ecb c\u1ee7a m\u00ecnh, c\u00e1c doanh nghi\u1ec7p kh\u00f4ng n\u00ean d\u1ef1a v\u00e0o \u0111\u00f3 l\u00e0m th\u01b0\u1edbc \u0111o quy\u1ebft \u0111\u1ecbnh hi\u1ec7u n\u0103ng h\u1ec7 th\u1ed1ng storage. Thay v\u00ec \u0111\u1eb7t c\u00e2u h\u1ecfi: \u201ch\u1ec7 th\u1ed1ng v\u1edbi bao nhi\u00eau IOPS l\u00e0 \u0111\u01b0\u1ee3c?\u201d, ta n\u00ean h\u1ecfi r\u1eb1ng: \u201cTh\u1eddi gian x\u1eed l\u00fd \u1ee9ng d\u1ee5ng l\u00e0 bao nhi\u00eau?\u201d. Latency n\u00ean \u0111\u01b0\u1ee3c xem l\u00e0 th\u00f4ng s\u1ed1 h\u1eefu \u00edch nh\u1ea5t, v\u00ec n\u00f3 t\u00e1c \u0111\u1ed9ng tr\u1ef1c ti\u1ebfp l\u00ean hi\u1ec7u n\u0103ng c\u1ee7a h\u1ec7 th\u1ed1ng, n\u00f3 l\u00e0 y\u1ebfu t\u1ed1 ch\u00ednh n\u00ean d\u1ef1a v\u00e0o \u0111\u1ec3 t\u00ednh ra ch\u1ec9 s\u1ed1 IOPS v\u00e0 throughput. Ngh\u0129a l\u00e0 vi\u1ec7c gi\u1ea3m thi\u1ec3u latency s\u1ebd tr\u1ef1c ti\u1ebfp c\u1ea3i thi\u1ec7n hi\u1ec7u n\u0103ng chung c\u1ee7a c\u1ea3 h\u1ec7 th\u1ed1ng.<\/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; hi\u1ec7u n\u0103ng cao \u1ea9n m\u00ecnh trong th\u1ebf gi\u1edbi l\u01b0u tr\u1eef doanh nghi\u1ec7p<\/a><\/li>\n<li><a href=\"https:\/\/thegioimaychu.vn\/blog\/?post_type=post&#038;p=21606\">Gi\u1ea3i ph\u00e1p t\u00edch h\u1ee3p AI v\u00e0o h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef d\u1eef li\u1ec7u doanh nghi\u1ec7p: T\u01b0\u01a1ng lai \u0111\u00e3 \u0111\u1ebfn!<\/a><\/li>\n<li><a href=\"https:\/\/thegioimaychu.vn\/blog\/?post_type=post&#038;p=21598\">Gi\u1ea3i ph\u00e1p l\u01b0u tr\u1eef c\u1ee7a Infortrend: C\u00e1ch m\u1ea1ng h\u00f3a Qu\u1ea3n l\u00fd D\u1eef li\u1ec7u Y t\u1ebf<\/a><\/li>\n<li><a href=\"https:\/\/thegioimaychu.vn\/blog\/?post_type=post&#038;p=21510\">C\u1eadp nh\u1eadt danh m\u1ee5c l\u01b0u tr\u1eef c\u1ee7a Infortrend: T\u1eeb AI \u0111\u1ebfn H\u1ea1 t\u1ea7ng Doanh nghi\u1ec7p<\/a><\/li>\n<li><a href=\"https:\/\/thegioimaychu.vn\/blog\/?post_type=post&#038;p=20823\">L\u01b0u tr\u1eef doanh nghi\u1ec7p n\u0103m 2025: 6 xu h\u01b0\u1edbng kh\u00f4ng th\u1ec3 b\u1ecf qua<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Kh&aacute;i ni&#7879;m Latency Latency l&agrave; kh&aacute;i ni&#7879;m v&#7873; t&#7889;c &#273;&#7897; x&#7917; l&yacute; m&#7897;t request I\/O c&#7911;a h&#7879; th&#7889;ng. Kh&aacute;i ni&#7879;m n&agrave;y r&#7845;t quan tr&#7885;ng b&#7903;i v&igrave; m&#7897;t h&#7879; th&#7889;ng l&#432;u tr&#7919; m&#7863;c d&ugrave; ch&#7881; c&oacute; 1000 IOPS v&#7899;i th&#7901;i gian x&#7917; l&yacute; trung b&igrave;nh c&oacute; latency 10ms, v&#7851;n c&oacute; th&#7875; t&#7889;t h&#417;n m&#7897;t h&#7879; th&#7889;ng&#8230;<\/p>\n","protected":false},"author":2,"featured_media":10666,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[2,162,1],"tags":[32],"class_list":["post-10662","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ao-hoa","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>\u0110\u1ed9 tr\u1ec5 \u2013 Latency: Th\u00f4ng s\u1ed1 quan tr\u1ecdng nh\u1ea5t trong h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef - 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\/ao-hoa\/do-tre-latency-thong-so-quan-trong-nhat-trong-he-thong-luu-tru-p10662\/\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"\u0110\u1ed9 tr\u1ec5 \u2013 Latency: Th\u00f4ng s\u1ed1 quan tr\u1ecdng nh\u1ea5t trong h\u1ec7 th\u1ed1ng l\u01b0u tr\u1eef - Blog | TheGioiMayChu\" \/>\n<meta name=\"twitter:description\" content=\"Kh&aacute;i ni&#7879;m Latency Latency l&agrave; kh&aacute;i ni&#7879;m v&#7873; t&#7889;c &#273;&#7897; x&#7917; l&yacute; m&#7897;t request I\/O c&#7911;a h&#7879; th&#7889;ng. 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