[Samba] Samba performance issue
azertyzero at free.fr
Thu Jan 1 18:35:06 GMT 2009
Hello, I sent the following message to the Debian folks.
They don't think that the Debian packaging could be responsible for the
issue described there.
> Well, I'm not completely convinced that we will have very useful input
> for you. I don't really see any reason for this to be caused by the
> Debian packaging. To check this, why not compile samba from sources,
> install it in /usr/local and run the same tests?
> I also recommend you bring this problem in the samba users mailing
> lists (samba at lists.samba.org seems appropriate).
I must say I didn't try to compile it from the upstream sources for many
Anyway, I think that there is poor chances for the issue to be related
with the Debian package.
Thank you in advance for your advices ;)
Happy new year ! (yeah, it depends on where you are in the world !!)
sorry to write directly to you, but after long hours spent trying to
solve this strange problem, I thought it could be handled better by
speaking directly with you. I hope I'm not wrong...
While testing samba speed on my file server, using a fully tested
gigabyte ethernet connexion, I encontered some very strange performance
I had big speed differences when using samba locally, or via the network
"Mb" stands for Mbytes.
* My server config :
- AMD X2 4200+
- 2 Go RAM
- 4 x 500 Go --> RAID5
- Gigabyte connection
- Debian ETCH
- debian package : Samba 3.0.24 (I also tried to backport the testing
version => 3.2.5 but the results were exactly the same)
* My samba share folder is a partition of my RAID 5 (reading : 170 Mb/s
& writing : 90 Mb/s).
* Here are my benchmarks (nearly the same from Linux or Windows) :
- Reading via ftp on the server (no samba) from a Gigabyte client :
- Reading on the samba server from a Gigabyte client
- Writting via ftp on the server (no samba) from a Gigabyte client :
- Writing on the samba server from a Gigabyte client :
I also noticed that if I try to read/write on the samba server from more
than just one client, the results is exactly the same : the server
bandwith limit is 35(up)/40(down) Mb/s.
/!\ When I mount the samba partition localy (on the server) I can read
at 115 Mb/s or write at 90 Mb/s, which is the good behavior.
I tried MS Windows and Linux (etch) smbfs clients.
I did a lot of testing, using a 1Go RAM disk on both sides to avoid
disks problems, and got the same test results.
Do you think that the problem could come from the Debian package ?
I investigated google a lot and found very few people reporting this
strange behavior (mainly from ubuntu forums). I am pretty sure that
several (every ?) people, at least from debian, are concerned. I think
that they just didn't notice the speed problem (35Mo/s is still quite
nice to be noticeable).
I found some people trying to tweak the samba buffers : they only got a
little better speed (+ 5Mo/s).
My smb.conf file is attached.
Thanks for your help.
-------------- next part --------------
workgroup = MSHOME
server string = zeus
interfaces = eth1
bind interfaces only = Yes
security = SHARE
guest account = sambauser
name resolve order = host wins bcast
load printers = No
os level = 0
preferred master = No
local master = No
domain master = No
invalid users = root
force group = sambashare
comment = private_data
path = /data1
read only = No
create mask = 0770
directory mask = 0770
comment = common_data
path = /data2
read only = No
create mask = 0775
directory mask = 0775
guest ok = Yes
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