[Samba] Connection dropped when copying large files toa SambaServer

Michelle Dupuis support at ocg.ca
Mon Feb 5 15:36:18 GMT 2007

Just another clue for you:

The samba crash/lockup appears to happen at the END of a large file write.
I can write 2gb or 65gb files across the lan to the samba share, but when
the file is (or is about to be) closed, samba locks up the share.

I already tried with NO socket options - same results....


-----Original Message-----
From: samba-bounces+support=ocg.ca at lists.samba.org
[mailto:samba-bounces+support=ocg.ca at lists.samba.org] On Behalf Of Toby
Sent: Monday, February 05, 2007 9:36 AM
To: samba at lists.samba.org
Subject: Re: [Samba] Connection dropped when copying large files toa

Michelle Dupuis wrote:
> Not hijacking the thread here...just adding more info as I have the 
> same issue.
> I run Samba 3.0.23c (on FC6 64 bit), and am backing up from a Windows 
> box to my Samba share.  Sometimes it works great; other times the 
> samba share locks up (I need to restart the smb service); and last 
> week samba caused a kernel panic.  I can sometimes get 65GB onto the share
before it locks up.
> I can backup to the share using NFS (using Windows Services for Unix) 
> without issue, but not to Samba.  My relevant smb.conf settings are:
> reset on zero vc = yes
> read raw = yes
> socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192

Recent thinking is that so_rcvbuf & so_sndbuf are probably not needed
anymore and may actually degrade performance. Try commenting them out & test



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