{"id":522,"date":"2025-01-02T11:38:43","date_gmt":"2025-01-02T03:38:43","guid":{"rendered":"https:\/\/znl.pub\/?p=522"},"modified":"2025-01-02T18:29:17","modified_gmt":"2025-01-02T10:29:17","slug":"%e3%80%90%e9%9b%86%e5%90%88%e3%80%91%e7%bd%91%e7%bb%9c%e7%9f%a5%e8%af%86","status":"publish","type":"post","link":"https:\/\/znl.pub\/?p=522","title":{"rendered":"\u3010\u96c6\u5408\u3011\u7f51\u7edc\u77e5\u8bc6"},"content":{"rendered":"\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>http1.0\u4e0ehttp2.0\u6709\u4f55\u533a\u522b\uff1f<\/summary>\n<p><strong>HTTP1.0<\/strong> \u9ed8\u8ba4\u662f\u77ed\u8fde\u63a5\uff0cHTTP 1.1 \u9ed8\u8ba4\u662f\u957f\u8fde\u63a5\uff0cHTTP 2.0 \u91c7\u7528\u7684<strong>\u591a\u8def\u590d\u7528<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"838\" src=\"https:\/\/znl.pub\/wp-content\/uploads\/2025\/01\/640-1024x838.webp\" alt=\"\" class=\"wp-image-523\" srcset=\"https:\/\/znl.pub\/wp-content\/uploads\/2025\/01\/640-1024x838.webp 1024w, https:\/\/znl.pub\/wp-content\/uploads\/2025\/01\/640-300x246.webp 300w, https:\/\/znl.pub\/wp-content\/uploads\/2025\/01\/640-768x629.webp 768w, https:\/\/znl.pub\/wp-content\/uploads\/2025\/01\/640.webp 1080w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>tcp \u7684\u6325\u624b\u4e3a\u4ec0\u4e48\u662f\u56db\u6b21\uff0c\u800c\u4e0d\u662f\u4e09\u6b21\u5462\uff1f<\/summary>\n<p>\u56e0\u4e3a TCP \u662f\u5168\u53cc\u5de5\u901a\u4fe1\u534f\u8bae\uff0c\u6570\u636e\u7684\u53d1\u9001\u548c\u63a5\u6536\u9700\u8981\u4e24\u6b21\u4e00\u6765\u4e00\u56de\uff0c\u4e5f\u5c31\u662f\u56db\u6b21\uff0c\u6765\u786e\u4fdd\u53cc\u65b9\u90fd\u80fd\u6b63\u786e\u5173\u95ed\u8fde\u63a5\u3002<br><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"887\" src=\"https:\/\/znl.pub\/wp-content\/uploads\/2025\/01\/640-1-1024x887.webp\" alt=\"\" class=\"wp-image-526\" srcset=\"https:\/\/znl.pub\/wp-content\/uploads\/2025\/01\/640-1-1024x887.webp 1024w, https:\/\/znl.pub\/wp-content\/uploads\/2025\/01\/640-1-300x260.webp 300w, https:\/\/znl.pub\/wp-content\/uploads\/2025\/01\/640-1-768x666.webp 768w, https:\/\/znl.pub\/wp-content\/uploads\/2025\/01\/640-1.webp 1080w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n<\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>tcp\u7684\u4e09\u6b21\u63e1\u624b\u5efa\u7acb\u8fc7\u7a0b\uff0c\u4e24\u7aef\u7684\u72b6\u6001\u53d8\u5316\u3002<\/summary>\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"732\" height=\"610\" src=\"https:\/\/znl.pub\/wp-content\/uploads\/2025\/01\/v2-d25a61e84b7aa63d40bf38c44e2e6fc1_r.jpg\" alt=\"\" class=\"wp-image-527\" srcset=\"https:\/\/znl.pub\/wp-content\/uploads\/2025\/01\/v2-d25a61e84b7aa63d40bf38c44e2e6fc1_r.jpg 732w, https:\/\/znl.pub\/wp-content\/uploads\/2025\/01\/v2-d25a61e84b7aa63d40bf38c44e2e6fc1_r-300x250.jpg 300w\" sizes=\"auto, (max-width: 732px) 100vw, 732px\" \/><\/figure>\n\n\n\n<p>\u7b2c\u4e00\u6b21\u6325\u624b\uff1a\u5ba2\u6237\u7aef\u8868\u793a\u6570\u636e\u53d1\u9001\u5b8c\u6210\u4e86\uff0c\u51c6\u5907\u5173\u95ed\uff0c\u4f60\u786e\u8ba4\u4e00\u4e0b\u3002<\/p>\n\n\n\n<p>\u7b2c\u4e8c\u6b21\u6325\u624b\uff1a\u670d\u52a1\u7aef\u56de\u8bdd\u8bf4 ok\uff0c\u6211\u9a6c\u4e0a\u5904\u7406\u5b8c\u6570\u636e\uff0c\u7a0d\u7b49\u3002<\/p>\n\n\n\n<p>\u7b2c\u4e09\u6b21\u6325\u624b\uff1a\u670d\u52a1\u7aef\u8868\u793a\u5904\u7406\u5b8c\u4e86\uff0c\u53ef\u4ee5\u5173\u95ed\u4e86\u3002<\/p>\n\n\n\n<p>\u7b2c\u56db\u6b21\u6325\u624b\uff1a\u5ba2\u6237\u7aef\u8bf4\u597d\uff0c\u8fdb\u5165 TIME_WAIT \u72b6\u6001\uff0c\u786e\u4fdd\u670d\u52a1\u7aef\u5173\u95ed\u8fde\u63a5\u540e\uff0c\u81ea\u5df1\u518d\u5173\u95ed\u8fde\u63a5\u3002<\/p>\n<\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>\u5feb\u901f\u67e5\u770blinux\u4e0b\u5404\u7f51\u7edc\u72b6\u6001\u6570\u91cf\u7684bash\u547d\u4ee4<\/summary>\n<pre class=\"wp-block-code\"><code>netstat -na | awk '\/^tcp\/ {++S&#91;$NF]} END {for(a in S) print a, S&#91;a]}'<\/code><\/pre>\n<\/details>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>\u5173\u4e8e\u5982\u4f55\u663e\u8457\u51cf\u5c11time_wait\u6570\u91cf\uff1f<\/summary>\n<p>\u7f51\u7edc\u4e0a\u9762\u5f88\u591a\u6559\u7a0b\uff0c\u4ec0\u4e48tw\u590d\u7528\uff0c\u4ec0\u4e48tw\u56de\u73af\uff0c\u5176\u5b9e\u6709\u51e0\u4eba\u771f\u6b63\u5b9e\u9a8c\u8fc7\u5462\uff0c\u8fd9\u91cc\u5148\u8bb0\u5f55\u4e00\u4e2a\u4eba\u7684\u535a\u6587\uff1a<a href=\"https:\/\/xiaodongq.github.io\/2024\/07\/13\/tcp-timewait-rcv-request\/\">https:\/\/xiaodongq.github.io\/2024\/07\/13\/tcp-timewait-rcv-request\/<\/a>\u3002<\/p>\n\n\n\n<p>\u67e5\u8be2\u6240\u6709\u4e0etime_wait\u6709\u5173\u7684\u914d\u7f6e\u9879\u76ee\uff0c\u5b9e\u9645\u4e0a\u5c31\u4e09\u4e2a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># sysctl -a| grep _tw_\nnet.ipv4.tcp_max_tw_buckets = 262144\nnet.ipv4.tcp_tw_reuse = 1\nnet.ipv4.tcp_tw_timeout = 60\n<\/code><\/pre>\n\n\n\n<p>\u7f51\u4e0a\u90fd\u662f\u6559\u4f60\u542f\u7528 tcp_tw_reuse \uff0c\u4fee\u6539 tcp_fin_timeout \u3002\u8fd8\u6709\u5199\u5f00\u542fnet.ipv4.tcp_tw_recycle\u8fd9\u4e2a\u5f00\u5173\uff0c\u5173\u4e8e\u5f00\u8fd9\u4e2a\u6709\u4ec0\u4e48\u6761\u4ef6\u5927\u5bb6\u53ef\u4ee5\u770b\u8fd9\u7bc7\u6587\u7ae0\u7684\u6848\u4f8b2\uff1a<a href=\"https:\/\/blog.51cto.com\/u_3369545\/6690671\">https:\/\/blog.51cto.com\/u_3369545\/6690671<\/a>\u3002<\/p>\n\n\n\n<p>\u6211\u8981\u8bf4\u7684\u5c31\u662f\u7ecf\u8fc7\u6211\u5b9e\u6d4b\uff0c\u6700\u6709\u6548\u7684\u51cf\u5c11time_wait\u7684\u529e\u6cd5\u662f\u4fee\u6539 tcp_tw_timeout \u8fd9\u4e2a\u53c2\u6570\uff0c\u6539 tcp_fin_timeout \u5e76\u4e0d\u4f1a\u771f\u7684\u51cf\u5c11time_wait\u7684\u65f6\u95f4\uff0c\u6211\u5df2\u7ecf\u6d4b\u8bd5\u8fc7\u4e86\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>sysctl -w net.ipv4.tcp_tw_timeout=10<\/code><\/pre>\n<\/details>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[],"class_list":["post-522","post","type-post","status-publish","format-standard","hentry","category-24"],"_links":{"self":[{"href":"https:\/\/znl.pub\/index.php?rest_route=\/wp\/v2\/posts\/522","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/znl.pub\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/znl.pub\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/znl.pub\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/znl.pub\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=522"}],"version-history":[{"count":6,"href":"https:\/\/znl.pub\/index.php?rest_route=\/wp\/v2\/posts\/522\/revisions"}],"predecessor-version":[{"id":533,"href":"https:\/\/znl.pub\/index.php?rest_route=\/wp\/v2\/posts\/522\/revisions\/533"}],"wp:attachment":[{"href":"https:\/\/znl.pub\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=522"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/znl.pub\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=522"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/znl.pub\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=522"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}