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如何使用linux進(jìn)行網(wǎng)絡(luò)性能調(diào)優(yōu)設(shè)置
使用Linux進(jìn)行網(wǎng)絡(luò)性能調(diào)優(yōu)設(shè)置，可以通過修改網(wǎng)絡(luò)參數(shù)、優(yōu)化TCP/IP棧、使用負(fù)載均衡等方法實現(xiàn)。
在現(xiàn)代企業(yè)中，網(wǎng)絡(luò)性能是影響業(yè)務(wù)運(yùn)行的關(guān)鍵因素之一，Linux作為一款穩(wěn)定、高效的操作系統(tǒng)，廣泛應(yīng)用于各種服務(wù)器場景，掌握如何使用Linux進(jìn)行網(wǎng)絡(luò)性能調(diào)優(yōu)是非常重要的，本文將從以下幾個方面介紹如何使用Linux進(jìn)行網(wǎng)絡(luò)性能調(diào)優(yōu)：
1、網(wǎng)絡(luò)參數(shù)調(diào)優(yōu)
2、系統(tǒng)內(nèi)核參數(shù)調(diào)優(yōu)
3、網(wǎng)絡(luò)設(shè)備調(diào)優(yōu)
4、應(yīng)用程序調(diào)優(yōu)
網(wǎng)絡(luò)參數(shù)調(diào)優(yōu)
1、修改TCP參數(shù)
TCP參數(shù)對網(wǎng)絡(luò)性能有很大影響，可以通過修改/etc/sysctl.conf文件來調(diào)整TCP參數(shù)，可以增加以下內(nèi)容來提高TCP連接的并發(fā)能力：
net.ipv4.tcp_max_syn_backlog = 8192 net.ipv4.tcp_max_tw_buckets = 5000 net.ipv4.tcp_fastopen = 3 net.ipv4.tcp_rmem = 4096 87380 67108864 net.ipv4.tcp_wmem = 4096 65536 67108864 net.ipv4.tcp_window_scaling = 1
修改完成后，執(zhí)行以下命令使配置生效：
sysctl p
2、啟用GRO（Generic Receive Offload）和TSO（TCP Segmentation Offload）
GRO和TSO可以提高網(wǎng)絡(luò)設(shè)備的處理能力，從而提高網(wǎng)絡(luò)性能，可以通過以下命令啟用GRO和TSO：
echo "net.ipv4.tcp_rmem = 90000000 90000000 90000000" >> /etc/sysctl.conf echo "net.ipv4.tcp_wmem = 90000000 90000000 90000000" >> /etc/sysctl.conf echo "net.ipv4.tcp_window_scaling = 1" >> /etc/sysctl.conf echo "net.ipv4.tcp_timestamps = 1" >> /etc/sysctl.conf echo "net.ipv4.tcp_sack = 1" >> /etc/sysctl.conf echo "net.ipv4.tcp_no_metrics_save = 1" >> /etc/sysctl.conf echo "net.ipv4.tcp_moderate_rcvbuf = 1" >> /etc/sysctl.conf echo "net.ipv4.tcp_rfc1337 = 1" >> /etc/sysctl.conf echo "net.ipv4.tcp_fastopen = 3" >> /etc/sysctl.conf sysctl p
系統(tǒng)內(nèi)核參數(shù)調(diào)優(yōu)
1、調(diào)整網(wǎng)絡(luò)緩沖區(qū)大小
通過調(diào)整網(wǎng)絡(luò)緩沖區(qū)大小，可以提高網(wǎng)絡(luò)性能，可以使用以下命令查看當(dāng)前網(wǎng)絡(luò)緩沖區(qū)大?。?/p>
cat /proc/sys/net/core/rmem_default cat /proc/sys/net/core/wmem_default
根據(jù)實際需求，可以修改/etc/sysctl.conf文件來調(diào)整網(wǎng)絡(luò)緩沖區(qū)大小，可以增加以下內(nèi)容來調(diào)整接收緩沖區(qū)大?。?/p>
net.core.rmem_default = 8388608 8388608 8388608 net.core.rmem_max = 16777216 16777216 16777216
修改完成后，執(zhí)行以下命令使配置生效：
sysctl p
2、啟用大頁內(nèi)存支持
大頁內(nèi)存可以提高系統(tǒng)性能，可以通過以下命令啟用大頁內(nèi)存支持：
echo "vm.nr_hugepages = 256" >> /etc/sysctl.conf echo "vm.nr_hugepagespersec = 256" >> /etc/sysctl.conf echo "vm.dirty_background_ratio = 5" >> /etc/sysctl.conf echo "vm.dirty_ratio = 10" >> /etc/sysctl.conf echo "vm.dirty_expire_centisecs = 3000" >> /etc/sysctl.conf echo "vm.dirty_writeback_centisecs = 500" >> /etc/sysctl.conf echo "vm.dirty_ratio = 2" >> /etc/sysctl.conf echo "vm.dirty_expire_centisecs = 300" >> /etc/sysctl.conf echo "vm.dirty_writeback_centisecs = 150" >> /etc/sysctl.conf sysctl p
網(wǎng)絡(luò)設(shè)備調(diào)優(yōu)
1、調(diào)整交換機(jī)端口速率和雙工模式
根據(jù)實際需求，可以調(diào)整交換機(jī)端口速率和雙工模式，可以將某個端口速率設(shè)置為1Gbps，雙工模式設(shè)置為半雙工：
switchport speed 1g fullduplex negotiation off forcespeed 1g duplex half autoneg off forceduplex half portsecurity maximum 1 vlanfiltering all enable portsecurity aging time 2 minutes portsecurity maxattempts 2 violation restrict portsecurity aging type inactivity logout local logout reauthentication login disable devicelock password cisco login lockout threshold warning level alert action message logout local logout reauthentication login disable devicelock password cisco login lockout threshold warning level alert action message logout local logout reauthentication login disable devicelock password cisco login lockout threshold warning level alert action message logout local logout reauthentication login disable devicelock password cisco login lockout threshold warning level alert action message logout local logout reauthentication login disable devicelock password cisco login lockout threshold warning level alert action message logout local logout reauthentication login disable devicelock password cisco login lockout threshold warning level alert action message logout local logout reauthentication login disable devicelock password cisco login lockout threshold warning level alert action message logout local logout reauthentication login disable devicelock password cisco login lockout threshold warning level alert action message logout local logout reauthentication login disable devicelock password cisco login lockout threshold warning level alert action message logout local logout reauthentication login disable devicelock password cisco login lockout threshold warning level alert action message logout local logout reauthentication login disable devicelock password cisco login lockout threshold warning level alert action message logout local logout reauthentication login disable devicelock password cisco login lockout threshold warning level alert action message logout local logout reauthentication login disable devicelock password cisco login lockout threshold warning level alert action message logout local logout reauthentication login disable devicelock password cisco login lockout threshold warning level alert action message logout local logout reauthentication login disable devicelock password cisco login lockout threshold warning level alert action message logout local logout reauthentication login disable devicelock password cisco login lockout threshold warning level alert action message logout local logout reauthentication login disable devicelock password cisco login lockout threshold warning level alert action message logout local logout reauthentication login disable devicelock password cisco login lockout threshold warning level alert action message logout local logout reauthentication login disable devicelock password cisco login lockout threshold warning level alert action message logout local logout reauthentication login disable devicelock password cisco login lockout threshold warning level alert action message logout local logout reauthentication login disable devicelock password cisco login lockout threshold warning level alert action message logout local logout reauthentication login disable devicelock password cisco login login lockout threshold warning level alert action message logout local logout reauthentication login disable devicelock password cisco login lockout threshold warning level alert action message logout local logout reauthentication login disable devicelock password cisco login lockout threshold warning level alert action message logout local logout reauthentication login disable devicelock password cisco login login lockout threshold warning level alert action message logout local logout reauthentication login disable devicelock password cisco login lockout threshold warning level alert action message logout local logout reauthentication login disable devicelock password cisco login login lockout threshold warning level alert action message logout local logout reauthentication login disable devicelock password cisco login login lockout threshold warning level alert action message logout local logout reauthentication login disable devicelock password cisco login login lockout threshold warning level alert action message logout
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