SUMMARY: Slow Samba on Solaris on certain Network cards
2007-12-24 21:38:00
First of all, thanks to all who replied.
"Changa"
David LaPorte,
Doug Floer,
Kevin Metzger,
Al Hopper,
Kevin Amorin,
Chris Hoogendyk,
Jesse Carroll...
This is definitely not a Samba problem, but really a network problem.
Most answers proposed to switch to 100 Mbs full-duplex on all NIC's, and
chack if it matches the configuration of the switches, since there have
been issues on mismatching configurations. The default on Solaris is
half-duplex only. This is how you do it on an interface named hmeX
"
add the
following to /etc/system on the solaris boxes:
set hme:hme_adv_autoneg_cap=0
set hme:hme_adv_100T4_cap=0
set hme:hme_adv_100fdx_cap=1
set hme:hme_adv_100hdx_cap=0
set hme:hme_adv_10fdx_cap=0
set hme:hme_adv_10hdx_cap=0
to make it take effect immediately, run:
ndd -set /dev/hme instance 0
ndd -set /dev/hme adv_100T4_cap 0
ndd -set /dev/hme adv_100fdx_cap 1
ndd -set /dev/hme adv_100hdx_cap 0
ndd -set /dev/hme adv_10fdx_cap 0
ndd -set /dev/hme adv_10hdx_cap 0
ndd -set /dev/hme adv_autoneg_cap 0
"
Changing to full-duplex speeded up some "mediumly slow" machines.
I've also found out that some of the really slow machines are behind a
5th cascaded hub, which isn't really recommended, though it didn't pose
any problems when we were on 10Mb/s.
Decreasing the number of hubs by one, and cleaning up our sloppy Network
configuration made them work like a charm.
So, definitely a Network problem. Samba's not in cause... :-)
Rami
Below, the original post.
*************************************************************
Rami Aubourg wrote:
> Hi, gurus,
>
> I have several solaris 7 and 8 servers on both Sparc and Intel
> platforms, as well as some Linux boxes.
>
> We are running Samba on all of those machines to share files with the
> Windows 98 and 2000 clients.
> The current version is 2.2.2, compiled from same source on all of the
> machines.
>
> Recently, we put the whole network from 10Mb/s to 100Mb/s, changing hubs
> and network cards on some client machines.
>
> It seems that ever since, When transferring files from Solaris to
> Windows, some of the client machines do it very slowly (i.e. 30mn for
> 50Mbytes), when other client machines are just slightly slower than a
> transfer from windows to windows. Using ftp or Solaris PC-NFS client,
> there are no problems. What's even more puzzling, is that there's no
> problem on the Linux machines, though the source code for Samba is
> exatly the same.
>
> I've read about an issue on Winsock dropping packets for some (as
> usually with M$) unknown reason and Samba waiting after each droppped
> packet before sending another one. So, I've played around with the
> "socket options" parameters TCP_NODELAY and SO_SNDBUF size, without any
> success.
>
> If someone has got a clue, I would thank him in advance, and will
> summarize of course.
>
> Rami
>
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