[lustre-discuss] lustre causing dropped packets

jongwoohan@naver.com jongwoohan at naver.com
Tue Dec 5 08:49:11 PST 2017

Did you check your connection with iperf and iperf3 in TCP bandwidth? in that case, these tools cannot find out packet drops.

Try checking out your block device backend responsibility with benchmark tools like vdbench or bonnie++. Sometimes bad block device causes incorrect data transfer.

-----Original Message-----
From: "Brian Andrus"<toomuchit at gmail.com> 
To: "lustre-discuss at lists.lustre.org"<lustre-discuss at lists.lustre.org>; 
Sent: 2017-12-06 (수) 01:38:04
Subject: [lustre-discuss] lustre causing dropped packets

I have a small setup I am testing (1 MGS, 2 OSS) that is connected via 
40G ethernet.

I notice that when I run anything that writes to the lustre filesystem 
causes dropped packets. Reads do not seem to cause this. I have also 
tested the network (iperf, iperf3, general traffic) with no dropped packets.

Is there something with writes that can cause dropped packets?

Brian Andrus

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