\u5982\u679c\u8f38\u51fa\u986f\u793a\u7684\u7248\u672c\u865f\u4f4e\u65bc4.9\uff0c\u60a8\u9700\u8981\u5148\u5347\u7d1a\u6838\u5fc3\u3002<\/p>\n

2. \u6838\u5fc3\u5347\u7d1a\u6d41\u7a0b\uff08\u5982\u9700\u8981\uff09<\/h3>\n

\u5c0d\u65bcUbuntu\/Debian\u7cfb\u7d71\uff0c\u57f7\u884c\u9019\u4e9b\u6307\u4ee4\uff1a<\/p>\n

# \u66f4\u65b0\u5957\u4ef6\u6e05\u55ae\r\napt update && apt upgrade -y\r\n\r\n# \u5982\u679c\u672a\u5b89\u88ddwget\u5247\u5b89\u88dd\r\napt install wget -y\r\n\r\n# \u4e0b\u8f09\u4e26\u5b89\u88dd\u6700\u65b0\u6838\u5fc3\r\nwget http:\/\/kernel.ubuntu.com\/~kernel-ppa\/mainline\/v5.x.x\/linux-image-5.x.x-generic.deb\r\ndpkg -i linux-image-5.x.x-generic.deb\r\n\r\n# \u91cd\u65b0\u555f\u52d5\u4f3a\u670d\u5668\r\nreboot<\/code><\/pre>\n
\u5c0d\u65bcCentOS\u7cfb\u7d71\uff0c\u904e\u7a0b\u7565\u6709\u4e0d\u540c\uff1a<\/p>\n
# \u555f\u7528ELRepo\u5132\u5b58\u5eab\r\nrpm --import https:\/\/www.elrepo.org\/RPM-GPG-KEY-elrepo.org\r\nrpm -Uvh http:\/\/www.elrepo.org\/elrepo-release-7.0-2.el7.elrepo.noarch.rpm\r\n\r\n# \u5b89\u88dd\u6700\u65b0\u4e3b\u7dda\u6838\u5fc3\r\nyum --enablerepo=elrepo-kernel install kernel-ml -y\r\n\r\n# \u8a2d\u5b9aGRUB\u4f7f\u7528\u65b0\u6838\u5fc3\r\ngrub2-set-default 0\r\ngrub2-mkconfig -o \/boot\/grub2\/grub.cfg\r\n\r\n# \u91cd\u65b0\u555f\u52d5\u4f3a\u670d\u5668\r\nreboot<\/code><\/pre>\n
3. \u555f\u7528BBR<\/h3>\n
\u78ba\u4fdd\u60a8\u6709\u76f8\u5bb9\u7684\u6838\u5fc3\u7248\u672c\u5f8c\uff0c\u6309\u7167\u4ee5\u4e0b\u6b65\u9a5f\u555f\u7528BBR\uff1a<\/p>\n
# \u5c07\u9019\u4e9b\u884c\u52a0\u5165\u5230\/etc\/sysctl.conf\r\necho \"net.core.default_qdisc=fq\" >> \/etc\/sysctl.conf\r\necho \"net.ipv4.tcp_congestion_control=bbr\" >> \/etc\/sysctl.conf\r\n\r\n# \u5957\u7528\u8b8a\u66f4\r\nsysctl -p\r\n\r\n# \u9a57\u8b49BBR\u5df2\u555f\u7528\r\nsysctl net.ipv4.tcp_congestion_control<\/code><\/pre>\n
4. \u9a57\u8b49\u6b65\u9a5f<\/h3>\n
\u8981\u78ba\u8a8dBBR\u6b63\u5e38\u904b\u4f5c\uff0c\u57f7\u884c\u9019\u4e9b\u6307\u4ee4\uff1a<\/p>\n
# \u6aa2\u67e5BBR\u662f\u5426\u5728\u4f7f\u7528\u4e2d\r\nlsmod | grep bbr\r\n\r\n# \u76e3\u63a7TCP\u64c1\u585e\u63a7\u5236\u6f14\u7b97\u6cd5\r\ncat \/proc\/sys\/net\/ipv4\/tcp_congestion_control<\/code><\/pre>\n
\u6548\u80fd\u76e3\u63a7\u548c\u512a\u5316<\/strong><\/h2>\n
\u5be6\u65bdBBR\u5f8c\uff0c\u76e3\u63a7\u548c\u9a57\u8b49\u5176\u5c0d\u4f3a\u670d\u5668\u6548\u80fd\u7684\u5f71\u97ff\u81f3\u95dc\u91cd\u8981\u3002\u8b93\u6211\u5011\u63a2\u8a0e\u61c9\u8a72\u8ffd\u8e64\u7684\u5de5\u5177\u548c\u6307\u6a19\u3002<\/p>\n
\u7db2\u8def\u6548\u80fd\u6e2c\u8a66<\/h3>\n
\u4f7f\u7528\u9019\u4e9b\u5c08\u9580\u5de5\u5177\u4f86\u6e2c\u91cf\u6539\u9032\uff1a<\/p>\n
# \u5b89\u88dd\u6548\u80fd\u6e2c\u8a66\u5de5\u5177\r\napt install iperf3 nethogs iftop -y\r\n\r\n# \u4f7f\u7528iperf3\u57f7\u884c\u901f\u5ea6\u6e2c\u8a66\r\niperf3 -c iperf.server.example.com -p 5201 -t 30\r\n\r\n# \u76e3\u63a7\u5373\u6642\u983b\u5bec\u4f7f\u7528\r\niftop -i eth0<\/code><\/pre>\n
\u9700\u8981\u76e3\u63a7\u7684\u95dc\u9375\u6307\u6a19\u5305\u62ec\uff1a<\/p>\n
\n
\u541e\u5410\u91cf\uff08Mbps\uff09<\/li>\n
\u5f80\u8fd4\u6642\u9593\uff08RTT\uff09<\/li>\n
\u8cc7\u6599\u5305\u4e1f\u5931\u7387<\/li>\n
\u9023\u7dda\u7a69\u5b9a\u6027<\/li>\n<\/ul>\n
\u9032\u968eBBR\u8abf\u6821\u53c3\u6578<\/strong><\/h2>\n
\u5c0d\u65bc\u9700\u8981\u7cbe\u7d30\u8abf\u6821\u6548\u80fd\u7684\u4f3a\u670d\u5668\u79df\u7528\u74b0\u5883\uff0c\u8003\u616e\u9019\u4e9b\u984d\u5916\u7684\u7cfb\u7d71\u53c3\u6578\uff1a<\/p>\n
# \u52a0\u5165\u5230\/etc\/sysctl.conf\r\nnet.core.rmem_max = 67108864\r\nnet.core.wmem_max = 67108864\r\nnet.ipv4.tcp_rmem = 4096 87380 67108864\r\nnet.ipv4.tcp_wmem = 4096 87380 67108864\r\nnet.ipv4.tcp_mtu_probing = 1\r\nnet.ipv4.tcp_slow_start_after_idle = 0<\/code><\/pre>\n
\u53c3\u6578\u8aaa\u660e\uff1a<\/h3>\n
\n
rmem_max\/wmem_max\uff1a\u6700\u5927\u63a5\u6536\/\u767c\u9001\u901a\u8a0a\u7aef\u7de9\u885d\u5340\u5927\u5c0f<\/li>\n
tcp_rmem\/tcp_wmem\uff1aTCP\u7de9\u885d\u5340\u7684\u81ea\u52d5\u8abf\u6821\u908a\u754c<\/li>\n
tcp_mtu_probing\uff1a\u555f\u7528\u8def\u5f91MTU\u63a2\u7d22<\/li>\n
tcp_slow_start_after_idle\uff1a\u505c\u7528\u9592\u7f6e\u671f\u5f8c\u7684TCP\u6162\u901f\u555f\u52d5<\/li>\n<\/ul>\n
\u5e38\u898b\u554f\u984c\u6545\u969c\u6392\u9664<\/strong><\/h2>\n
\u5728\u5be6\u65bdBBR\u6642\uff0c\u60a8\u53ef\u80fd\u9047\u5230\u9019\u4e9b\u6280\u8853\u6311\u6230\uff1a<\/p>\n
1. BBR\u8a2d\u5b9a\u5f8c\u672a\u8f09\u5165<\/h3>\n
# \u6aa2\u67e5BBR\u6a21\u7d44\u662f\u5426\u53ef\u7528\r\nmodprobe tcp_bbr\r\nlsmod | grep bbr\r\n\r\n# \u5982\u679c\u6a21\u7d44\u7f3a\u5931\uff0c\u91cd\u5efa\u6838\u5fc3\u6a21\u7d44\r\ndepmod -a\r\nmodprobe tcp_bbr<\/code><\/pre>\n
2. \u6548\u80fd\u672a\u9054\u5230\u9810\u671f<\/h3>\n
\u57f7\u884c\u6b64\u8a3a\u65b7\u5e8f\u5217\uff1a<\/p>\n
# \u6aa2\u67e5\u7576\u524d\u64c1\u585e\u63a7\u5236\r\nsysctl net.ipv4.tcp_congestion_control\r\n\r\n# \u9a57\u8b49\u4f47\u5217\u898f\u5247\r\nsysctl net.core.default_qdisc\r\n\r\n# \u76e3\u63a7TCP\u9023\u7dda\r\nss -info | grep bbr<\/code><\/pre>\n
\u5be6\u969b\u6548\u80fd\u5f71\u97ff<\/strong><\/h2>\n
\u57fa\u65bc\u5728\u5404\u7a2e\u4f3a\u670d\u5668\u79df\u7528\u74b0\u5883\u4e2d\u7684\u5ee3\u6cdb\u6e2c\u8a66\uff0cBBR\u901a\u5e38\u5e36\u4f86\u9019\u4e9b\u6548\u80fd\u63d0\u5347\uff1a<\/p>\n
\n
\u9ad8\u5ef6\u9072\u9023\u7dda\u7684\u541e\u5410\u91cf\u63d0\u9ad830-40%<\/li>\n
\u5e73\u5747\u9801\u9762\u8f09\u5165\u6642\u9593\u6e1b\u5c1115-25%<\/li>\n
\u5f71\u7247\u4e32\u6d41\u54c1\u8cea\u986f\u8457\u6539\u5584<\/li>\n
\u66f4\u597d\u5730\u8655\u7406\u7db2\u8def\u64c1\u585e\u4e8b\u4ef6<\/li>\n<\/ul>\n
\u6301\u7e8c\u512a\u5316\u7684\u6700\u4f73\u5be6\u8e10<\/strong><\/h2>\n
\u8981\u5728\u4f3a\u670d\u5668\u79df\u7528\u74b0\u5883\u4e2d\u7dad\u6301\u6700\u4f73\u6548\u80fd\uff0c\u5be6\u65bd\u9019\u4e9b\u9032\u968e\u505a\u6cd5\uff1a<\/p>\n
# \u5efa\u7acb\u76e3\u63a7\u6307\u4ee4\u78bc\r\n#!\/bin\/bash\r\nwhile true; do\r\n    date >> \/var\/log\/bbr_monitor.log\r\n    ss -info | grep bbr >> \/var\/log\/bbr_monitor.log\r\n    sleep 300\r\ndone<\/code><\/pre>\n
\u5b89\u6392\u5b9a\u671f\u6548\u80fd\u7a3d\u6838\uff1a<\/p>\n
# \u52a0\u5165\u5230crontab\r\n0 0 * * * \/usr\/local\/bin\/performance_audit.sh\r\n<\/code><\/pre>\n
\u672a\u4f86\u767c\u5c55\u548c\u66ff\u4ee3\u65b9\u6848<\/strong><\/h2>\n
\u96a8\u8457BBR\u6301\u7e8c\u767c\u5c55\uff0c\u8acb\u95dc\u6ce8\u9019\u4e9b\u65b0\u8208\u6280\u8853\uff1a<\/p>\n
\n
\u5177\u6709\u6539\u9032\u64c1\u585e\u63a7\u5236\u7684BBR v2<\/li>\n
\u6df7\u5408\u64c1\u585e\u63a7\u5236\u6f14\u7b97\u6cd5<\/li>\n
\u8207QUIC\u5354\u5b9a\u7684\u6574\u5408<\/li>\n<\/ul>\n
\u7d50\u8ad6\u548c\u95dc\u9375\u8981\u9ede<\/strong><\/h2>\n
BBR\u512a\u5316\u4ee3\u8868\u4e86\u4f3a\u670d\u5668\u6548\u80fd\u63d0\u5347\u7684\u91cd\u8981\u9032\u6b65\uff0c\u9019\u5c0d\u4f3a\u670d\u5668\u79df\u7528\u74b0\u5883\u5c24\u70ba\u91cd\u8981\u3002\u96d6\u7136\u5be6\u65bd\u904e\u7a0b\u5177\u6709\u6280\u8853\u6027\uff0c\u4f46\u5728\u6b63\u78ba\u8a2d\u5b9a\u6642\u80fd\u5e36\u4f86\u986f\u8457\u6548\u76ca\u3002\u6301\u7e8c\u76e3\u63a7\u60a8\u7684\u4f3a\u670d\u5668\u6548\u80fd\u6307\u6a19\uff0c\u4e26\u53ca\u6642\u66f4\u65b0\u5230\u6700\u65b0\u7684\u6838\u5fc3\u7248\u672c\u4ee5\u7372\u5f97\u6700\u4f73\u7d50\u679c\u3002<\/p>\n
\u5c0d\u65bc\u4f3a\u670d\u5668\u79df\u7528\u4f9b\u61c9\u5546\u548c\u7cfb\u7d71\u7ba1\u7406\u54e1\u4f86\u8aaa\uff0cBBR\u512a\u5316\u61c9\u88ab\u8996\u70ba\u5176\u6548\u80fd\u8abf\u6821\u5de5\u5177\u7d44\u4e2d\u7684\u6a19\u6e96\u5be6\u8e10\u3002\u6539\u9032\u7684\u541e\u5410\u91cf\u3001\u964d\u4f4e\u7684\u5ef6\u9072\u548c\u66f4\u597d\u7684\u64c1\u585e\u8655\u7406\u80fd\u529b\u4f7f\u5176\u6210\u70ba\u4efb\u4f55\u56b4\u8b39\u7684\u4f3a\u670d\u5668\u512a\u5316\u7b56\u7565\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u7d44\u6210\u90e8\u5206\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5c0d\u65bc\u7ba1\u7406\u4f3a\u670d\u5668\u79df\u7528\u57fa\u790e\u8a2d\u65bd\u7684\u6280\u8853\u5c08\u696d\u4eba\u54e1\u4f86\u8aaa\uff0c\u7f8e\u570b\u4f3a\u670d\u5668\u6548\u80fd\u512a\u5316\u59cb\u7d42\u662f\u4e00\u500b\u95dc\u9375\u8b70\u984c\u3002Google\u7684BBR\uff08\u74f6\u9838 […]<\/p>\n
Read More…<\/a><\/p>\n","protected":false},"author":3,"featured_media":21802,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[4815],"tags":[6133,6134,6132,2200,1945],"class_list":["post-21825","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-america-dedicated-server-tc","tag-us-server-performance-tc","tag-linux-kernel-tc","tag-bbr-optimization-tc","tag-dedicated-hosting-tc","tag-network-optimization-tc"],"acf":[],"yoast_head":"\n