Date: Tue, 29 Jun 2021 08:06:11 +0200 From: Gerrit Kuehn <gerrit.kuehn@aei.mpg.de> To: freebsd-net@freebsd.org Subject: Re: RFC: NFS trunking (multiple TCP connections for a mount Message-ID: <20210629080611.513b62d4@comet2.terra.ger> In-Reply-To: <YQXPR0101MB0968DC173855A82AAF45F08FDD039@YQXPR0101MB0968.CANPRD01.PROD.OUTLOOK.COM>
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On Tue, 29 Jun 2021 00:23:21 +0000 Rick Macklem <rmacklem@uoguelph.ca> wrote: > I don't understand how multiple TCP connections to the same > server IP address will distribute the load across multiple network > interfaces? > I thought that lagg would have handled this? I don't think this targets multiple interface situations. In my experience it is next to impossible to max. out a 10G connection with a single NFS connection running over it. The NICs have several independent queues like so (systat -ifstat): ixl0:aq ixl0:rxq0 ixl0:rxq1 ixl0:rxq2 ixl0:rxq3 ixl0:rxq4 ixl0:rxq5 ixl0:rxq6 ixl0:rxq7 A single connection will only use one of these, limiting the overall throughput. Spreading load across multiple connections sounds quite useful to me in this situation. cu Gerrithome | help
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