我有两台服务器，两台服务器的硬件规格都是
Processor : Dual Processor
RAM : over 128 G.B
Hard disk : SSD Hard disk
Outging Traffic bandwidth : 3 Gbps
network cards speed : 10 Gbps
服务器 A : 用于编码视频
服务器 B ：用于存储视频并通过 Web 界面播放视频就像 YouTube
两台服务器之间的入站带宽为10Gbps，出站带宽互联网带宽是500Mpbs
两台服务器均在公网和私网中使用公有 IP 地址
两台服务器都在 nginx 端口上传输和连接，服务器 B 用于流媒体，如 youtube 流视频
两台服务器在同一个网络中，当我从服务器 A ping 到服务器 B 时，我得到了高于 1.0 毫秒的较高时间延迟，时间范围为时间=52.7 毫秒至时间=215.7 毫秒 -
这是 iftop 实用程序的输出
353Mb 707Mb 1.04Gb 1.38Gb 1.73Gb
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server.example.com => ip.address 6.36Mb 4.31Mb 1.66Mb
<= 158Kb 94.8Kb 35.1Kb
server.example.com => ip.address 1.23Mb 4.28Mb 1.12Mb
<= 17.1Kb 83.5Kb 21.9Kb
server.example.com => ip.address 395Kb 3.89Mb 1.07Mb
<= 6.09Kb 109Kb 28.6Kb
server.example.com => ip.address 4.55Mb 3.83Mb 1.04Mb
<= 55.6Kb 45.4Kb 13.0Kb
server.example.com => ip.address 649Kb 3.38Mb 1.47Mb
<= 9.00Kb 38.7Kb 16.7Kb
server.example.com => ip.address 5.00Mb 3.32Mb 1.80Mb
<= 65.7Kb 55.1Kb 29.4Kb
server.example.com => ip.address 387Kb 3.13Mb 1.06Mb
<= 18.4Kb 39.9Kb 15.0Kb
server.example.com => ip.address 3.27Mb 3.11Mb 1.01Mb
<= 81.2Kb 64.5Kb 20.9Kb
server.example.com => ip.address 1.75Mb 3.08Mb 2.72Mb
<= 16.6Kb 35.6Kb 32.5Kb
server.example.com => ip.address 1.75Mb 2.90Mb 2.79Mb
<= 22.4Kb 32.6Kb 35.6Kb
server.example.com => ip.address 3.03Mb 2.78Mb 1.82Mb
<= 26.6Kb 27.4Kb 20.2Kb
server.example.com => ip.address 2.26Mb 2.66Mb 1.36Mb
<= 51.7Kb 49.1Kb 24.4Kb
server.example.com => ip.address 586Kb 2.50Mb 1.03Mb
<= 4.17Kb 26.1Kb 10.7Kb
server.example.com => ip.address 2.42Mb 2.49Mb 2.44Mb
<= 31.6Kb 29.7Kb 29.9Kb
server.example.com => ip.address 2.41Mb 2.46Mb 2.41Mb
<= 26.4Kb 24.5Kb 23.8Kb
server.example.com => ip.address 2.37Mb 2.39Mb 2.40Mb
<= 28.9Kb 27.0Kb 28.5Kb
server.example.com => ip.address 525Kb 2.20Mb 1.05Mb
<= 7.03Kb 26.0Kb 12.8Kb
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TX: cum: 102GB peak: 1.65Gb rates: 1.46Gb 1.44Gb 1.48Gb
RX: 1.31GB 24.3Mb 19.5Mb 18.9Mb 20.0Mb
TOTAL: 103GB 1.67Gb 1.48Gb 1.46Gb 1.50Gb
我使用 iperf 实用程序检查传输速度服务器 A到服务器 B
# iperf -c 0.0.0.2 -p 8777
------------------------------------------------------------
Client connecting to 0.0.0.2, TCP port 8777
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
[ 3] local 0.0.0.1 port 38895 connected with 0.0.0.2 port 8777
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.8 sec 528 KBytes 399 Kbits/sec
我当前在服务器 B 中的连接
# netstat -an|grep ":8777"|awk '/tcp/ {print $6}'|sort -nr| uniq -c
2072 TIME_WAIT
28 SYN_RECV
1 LISTEN
189 LAST_ACK
139 FIN_WAIT2
373 FIN_WAIT1
3381 ESTABLISHED
34 CLOSING
服务器 A网卡信息
Settings for eth0:
Supported ports: [ TP ]
Supported link modes: 100baseT/Full
1000baseT/Full
10000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: Yes
Advertised link modes: 10000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Speed: 10000Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 0
Transceiver: external
Auto-negotiation: on
MDI-X: Unknown
Supports Wake-on: d
Wake-on: d
Current message level: 0x00000007 (7)
drv probe link
Link detected: yes
服务器 B网卡信息
Settings for eth2:
Supported ports: [ FIBRE ]
Supported link modes: 10000baseT/Full
Supported pause frame use: No
Supports auto-negotiation: No
Advertised link modes: 10000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: No
Speed: 10000Mb/s
Duplex: Full
Port: Direct Attach Copper
PHYAD: 0
Transceiver: external
Auto-negotiation: off
Supports Wake-on: d
Wake-on: d
Current message level: 0x00000007 (7)
drv probe link
Link detected: yes
是否配置服务器A
eth0 Link encap:Ethernet HWaddr 00:25:90:ED:9E:AA
inet addr:0.0.0.1 Bcast:0.0.0.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1202795665 errors:0 dropped:64334 overruns:0 frame:0
TX packets:2313161968 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:893413096188 (832.0 GiB) TX bytes:3360949570454 (3.0 TiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:2207544 errors:0 dropped:0 overruns:0 frame:0
TX packets:2207544 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:247769175 (236.2 MiB) TX bytes:247769175 (236.2 MiB)
是否配置服务器 B
eth2 Link encap:Ethernet HWaddr 00:25:90:82:C4:FE
inet addr:0.0.0.2 Bcast:0.0.0.2 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:39973046980 errors:0 dropped:1828387600 overruns:0 frame:0
TX packets:69618752480 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:3013976063688 (2.7 TiB) TX bytes:102250230803933 (92.9 TiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:1049495 errors:0 dropped:0 overruns:0 frame:0
TX packets:1049495 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:129012422 (123.0 MiB) TX bytes:129012422 (123.0 MiB)
Netstat -i 开启服务器 B
# netstat -i
Kernel Interface table
Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR TX-DRP TX-OVR Flg
eth2 9000 0 42098629968 0 2131223717 0 73698797854 0 0 0 BMRU
lo 65536 0 1077908 0 0 0 1077908 0 0 0 LRU
我将网卡上的发送/接收缓冲区调至 2048，问题仍然存在
我增加了服务器 A 的 MTU，问题仍然存在，我增加了服务器 B 的 MTU，以获得更好的连接和传输速度，但根本无法传输
问题是：从 iperf 实用程序中可以看到，当我重新启动服务器 B 中的网络服务时，从服务器 A 到服务器 B 的传输速度很慢，服务器 A 中的传输以全速进行，2 分钟后，速度变慢
我该如何排除服务器 B 速度慢的问题并修复它？
注意：如果我需要在服务器中执行其他命令以获取更多信息，以便可能有助于解决问题，请在评论中告诉我