Hello!
Sorry for late answer but, i was on travel until sunday. I tried with
Ubuntu Live CD but still with similiar limit. So, I decided to upgrade
to Gigabit Interface (Switch & NICs).
Here, the results for the case someone is curious.
Now I get around 160MBit on average from and to the server. This does
not change when copying several files in parallel. With NETIO around
250MBit (linx-win) and 500MBit (win-win) are possible. I guess 20MB/s is
what i can get with this slow computer and Samba.
Thank you, Jeremy for the fast and good support,
Michael
Jeremy Allison schrieb:
On Fri, Apr 25, 2008 at 12:20:19AM +0200, Michael wrote:
Hello Everybody!
I set up a fileserver:
- Pentium II, 350 Mhz,
- 256MB RAM,
- Intel Fast Ethernet PCI
- VIA-SATA Controller
- 2x500GB SATA HDD RAID 1
- Debian 4, Samba 3
- Samba set up in user shares mode without special options, but with
the suggested optimizations
Clients:
- Windows XP Prof SP2
So far it works fine. I can read and write files without problem. But my
bandwith seems to be limited somehow. When i copy one file i get a
nearly constant transfer rate of about 6.8 MB/s (read and write).
Do i copy two files in parallel i get a total transfer rate of about
10MB/s (again for read and write)
with 3 files it is even around 11MB/s. Why i can't reach this transfer
rate with just one file? It is the same from both windows pc.
I benchmarked my network around 11.5MB/s are reached using netio
(Win-Win,Win-Debian).
The HDDs are reaching 60MB/s with hdparm -t /dev/sd?
I search for such an issue, but didn't find something useful. I looked into
the documentation, but didn't find some hints for that issue.
How can i find the bootleneck in the system?
I'd guess the problem is the Windows redirector only
allowing one outstanding 64k read/write request on
the wire at a time. This is a known problem with
XP. To test is this is the case, try using smbclient
from another Linux box to write a file and see
if the throughput rises. We allow up to max mux
(protocol limit) outstanding requests on the
wire.
Jeremy.
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