Bug #1923
Abysmal NFS performance with IPv6
0%
Description
I have recently setup a NFS share with IPv6 addresses on a gigabit lan. The
performance is abysmal: 500 KB/s max.
Both server and client are running DragonFly-2.8.2/x86-64
The same machines on the same lan have no trouble reaching tens of
MB/s with IPv4. Disk speed becomes the limiting factor.
Time spent copying some big files from the server to a local disk:
v4: sent 86109382 bytes received 31 bytes 24602689.43 bytes/sec
v6: sent 49660678 bytes received 31 bytes 266277.26 bytes/sec
All mounts were using tcp.
IPv6 transfer speed is about 100 time slower than IPv4.
History
Updated by ftigeot about 10 years ago
On Thu, Nov 25, 2010 at 01:16:16PM +0000, Francois Tigeot (via DragonFly issue tracker) wrote:
>
> New submission from Francois Tigeot <ftigeot@wolfpond.org>:
>
> I have recently setup a NFS share with IPv6 addresses on a gigabit lan. The
> performance is abysmal: 500 KB/s max.
This issue is not NFS-specific: the same performance gap can be seen when
copying files with rsync/ssh between LAN machines.