Re: Storage really slow on k8s

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Il 2020-03-18 18:41 Rene Bon Ciric ha scritto:
[ ID] Interval           Transfer     Bandwidth       Retr  Cwnd
[ 4] 0.00-1.00 sec 1.02 GBytes 8.77 Gbits/sec 1459 3.15 MBytes [ 4] 1.00-2.00 sec 1022 MBytes 8.58 Gbits/sec 2284 3.15 MBytes [ 4] 2.00-3.00 sec 1005 MBytes 8.43 Gbits/sec 2230 3.15 MBytes [ 4] 3.00-4.00 sec 982 MBytes 8.24 Gbits/sec 2334 2.38 MBytes
[  4]   4.00-5.00   sec   988 MBytes  8.29 Gbits/sec  668   2.65 MBytes
[ 4] 5.00-6.00 sec 983 MBytes 8.25 Gbits/sec 1370 2.86 MBytes [ 4] 6.00-7.00 sec 1010 MBytes 8.47 Gbits/sec 1017 2.12 MBytes [ 4] 7.00-8.00 sec 995 MBytes 8.35 Gbits/sec 2220 1.27 MBytes
[  4]   8.00-9.00   sec   923 MBytes  7.75 Gbits/sec  324   1.64 MBytes
[  4]   9.00-10.00  sec  1001 MBytes  8.40 Gbits/sec  532   1.96 MBytes

I can see that you have many packet retransmission. From my (limited) experience, they drastically affect IOPs, sometime bringing them to 0 (zero) for some seconds.

--
Danti Gionatan
Supporto Tecnico
Assyoma S.r.l. - www.assyoma.it [1]
email: g.danti@xxxxxxxxxx - info@xxxxxxxxxx
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