[Samba] Dropped frames streaming video to samba

[Matt London]

Hi,

Oops, I meant to include that info, obviously I forgot :&)

SLES9's samba-3.0.20b-3.4

smb.conf as follows:

[global]
   workgroup = ENCODING
   printing = cups
   printcap name = cups
   printcap cache time = 750
   cups options = raw
   map to guest = Bad User
   include = /etc/samba/dhcp.conf
   logon path = \\%L\profiles\.msprofile
   logon home = \\%L\%U\.9xprofile
   logon drive = P:
   security = user
   encrypt passwords = yes
   ldap suffix = dc=example,dc=com
   domain logons = no
   ldap idmap suffix = ou=Idmap
   ldap machine suffix = ou=Computers
   local master = yes
   passdb backend = smbpasswd
   wins support = yes
   netbios name = ENCODING
   add machine script =
   preferred master = auto
   load printers = no
[data]
   browsable = yes
   comment = Data Share
   guest ok = yes
   path = /data
   writeable = yes
   browseable = yes
   printable = no



--Matt London
Alliance Technologies
Tel: (416) 385 3255 x232
Fax: (416) 385 1774

>>> On Wed, Apr 19, 2006 at  5:45 pm, in message
<20060419214512.GA2075 at linux.suse.de>, Jeremy Allison <jra at samba.org> wrote: 
> On Wed, Apr 19, 2006 at 05:31:50PM - 0400, Matt London wrote:
>> Hi,
>> 
>> We've got a setup here with a samba server in front of a fibrechannel array. 
> It's a pretty vanilla samba setup exporting an xfs filesystem.
>> 
>> The box is an opteron 265 with 4G RAM and a QLogic QLA2312 HBA running 
> SLES9.
>> 
>> We can dd an 8G file to a share from a windows workstation in just over 2 
> minutes (about 65MB/s) and dd back in about 4 minutes.
>> 
>> Local disk performance in the machine gives about 195MB/s to disk and 
> 120MB/s from disk.
>> 
>> The problem comes when trying to capture video using Adobe Premiere 6.5 and 
> write straight to the share -  we get a *lot* of dropped frames (somewhere in 
> the region of 25%+). Yet the same job to an Adaptec Snap server (which is 
> samba on adaptec's guardianOS) works fine, even through it can only sustain 
> 10MB/s.
>> 
> 
> Well it's the same codebase so it should be just as fast :- ).
> Firstly, what version of Samba are you running ? Secondly,
> what do you have in your smb.conf ?
> 
> Jeremy.