FreeBSD: Samba performance over GBit-Ethernet

Posted by Axel Gneiting on Server Fault See other posts from Server Fault or by Axel Gneiting
Published on 2011-01-07T14:22:53Z Indexed on 2011/01/07 14:55 UTC
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Performance

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samba

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freebsd

I'm using a FreeBSD NAS with RAID-Z.

I can read ~300MB/s from the ZFS disks to /dev/null on the box, but only get about 50MB/s over GBit-Ethernet with SMB to Windows 7 (Samba 3.5.6). Both systems have Intel-PCIe-NICs and are connected directly.

Samba is configured to use AIO and I already tried to tune TCP/IP:

kern.ipc.maxsockbuf=16777216
net.inet.tcp.sendspace=1048576
net.inet.tcp.recvspace=1048576
net.inet.tcp.sendbuf_max=8388608
net.inet.tcp.recvbuf_max=8388608
net.inet.tcp.delayed_ack=0

Any ideas what's causing the bottleneck? I think the link should handle 100 MB/s easily.

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