Re: [測試] Mellanox ConnectX-3 40GbE 網卡測試

※ 引述《tacovirus (大怒神のスイッチ)》之銘言：
: 這張網卡裝在先前 5950X + WS X570-ACE 的機器上
: 型號是 MCX313A-BCCT
: https://i.imgur.com/x7LwWyd.jpg

https://imgur.com/a/vy513pX

接著來實測, 三秒時拔掉光纖觀察, 然後插回去

# iperf3 -c 172.16.50.32 -t 60
Connecting to host 172.16.50.32, port 5201
[ 5] local 172.16.50.31 port 42834 connected to 172.16.50.32 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 3.97 GBytes 34.1 Gbits/sec 0 1.38 MBytes
[ 5] 1.00-2.00 sec 3.19 GBytes 27.4 Gbits/sec 0 1.49 MBytes
[ 5] 2.00-3.00 sec 2.78 GBytes 23.9 Gbits/sec 0 1.49 MBytes
[ 5] 3.00-4.00 sec 95.0 MBytes 797 Mbits/sec 1011 321 KBytes
[ 5] 4.00-5.00 sec 112 MBytes 944 Mbits/sec 0 352 KBytes
[ 5] 5.00-6.00 sec 112 MBytes 944 Mbits/sec 0 352 KBytes
[ 5] 6.00-7.00 sec 111 MBytes 933 Mbits/sec 0 352 KBytes
[ 5] 7.00-8.00 sec 112 MBytes 944 Mbits/sec 0 352 KBytes
[ 5] 8.00-9.00 sec 97.5 MBytes 818 Mbits/sec 0 352 KBytes
[ 5] 9.00-10.00 sec 2.98 GBytes 25.6 Gbits/sec 242 1.42 MBytes
[ 5] 10.00-11.00 sec 3.43 GBytes 29.5 Gbits/sec 0 1.42 MBytes
[ 5] 11.00-12.00 sec 3.53 GBytes 30.3 Gbits/sec 0 1.42 MBytes
[ 5] 12.00-13.00 sec 3.82 GBytes 32.8 Gbits/sec 0 1.42 MBytes

實測結果看起來確實有接手, 恢復正常時也會自己切回 40G

接著來觀察流量損失

# iperf -c 172.16.50.32 -P 3
------------------------------------------------------------
Client connecting to 172.16.50.32, TCP port 5001
TCP window size: 85.0 KByte (default)
------------------------------------------------------------
[ 3] local 172.16.50.31 port 52454 connected with 172.16.50.32 port 5001
[ 4] local 172.16.50.31 port 52456 connected with 172.16.50.32 port 5001
[ 5] local 172.16.50.31 port 52458 connected with 172.16.50.32 port 5001
[ ID] Interval Transfer Bandwidth
[ 4] 0.0000-10.0007 sec 14.6 GBytes 12.5 Gbits/sec
[ 5] 0.0000-10.0004 sec 14.5 GBytes 12.4 Gbits/sec
[ 3] 0.0000-10.0004 sec 14.6 GBytes 12.5 Gbits/sec
[SUM] 0.0000-10.0004 sec 43.7 GBytes 37.5 Gbits/sec
[ CT] final connect times (min/avg/max/stdev) = 0.286/0.385/0.512/0.255 ms (tot/

頻寬從 39.5 下降到 37.5, 損失還在可接受範圍
看起來可以放心使用 iSCSI 了

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網路越慢 心則快

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NAS 交期要四周以上，先拿兩顆硬碟頂著