Hi all,
There are 2 boxes with FreeBSD 10-RELEASE:
FreeBSD storage3 10.0-RELEASE-p10 FreeBSD 10.0-RELEASE-p10 #0: Mon Oct
20 12:42:25 UTC 2014
r...@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC amd64
They are connected using L2 IPsec VPN
iperf with extended window size (iperf -s -w 1400K)
shows that the connection bandwidth between hosts is around 4Mbit/s
I would like to transmit data from box1 ZFS pool to box2 ZFS pool.
I am using the mbuffer to do this:
on box2 (dst):
# mbuffer -v 5 -4 -I 9090 | zfs receive -Fduv tank1/ze-storage2
on box1(src):
# zfs send -R tank1/PROD@20141030 | mbuffer -v 5 -4 -O 172.25.25.85:9090
The transfer speed is around 180KB/s (~2Mbit/s)
After Googling, I realised I might need to extend the TCP Window (as
mbuffer does not extend TCP Window size).
On both boxes, I have tuned the following sysctls:
# sysctl kern.ipc.maxsockbuf=16777216
# sysctl net.inet.tcp.sendspace=1048576
# sysctl net.inet.tcp.recvspace=1048576
# sysctl net.inet.tcp.rfc1323=1
However, it doesn't make the speed transmission faster.
Changing the mbuffer options to:
-s 128k -m 1G
Neither helps.
Do you have any idea how to saturate the L2 IPSec VPN connection between
hosts?
regards,
Marek
--
Marek Salwerowicz
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