[Samba] 1MB/s gigabit transfers on dell poweredge

[John Drescher]

On Sat, Mar 14, 2009 at 1:52 PM, Ian McDonald <iam at st-andrews.ac.uk> wrote:
> John Drescher wrote:
>>
>> On Sat, Mar 14, 2009 at 1:30 PM,  <godwin at acp-online.co.uk> wrote:
>>>
>>> Hi Volker,John, folks
>>>
>>> I upgraded the smb binaries to 3.0.24 and reduced the log level and my
>>> samba servers now giving throughputs of 32-38 mbps with some spikes
>>> beyond
>>> 60mbps .
>>>
>>> That's way below what John's getting. Anyway, I can at least finish off
>>> this installation as my samba server can match or exceed the clients
>>> benchmark against his existing MS windows server.
>>>
>>> Since I am using 3 X 1 terabyte disks in a hardware raid 5 array disk I/O
>>> should not be an issue. I expect the issue to be too may patch points
>>> (the
>>> joy of structured cabling) or not too good switches.
>>>
>> I believe that actually is a problem. I mean you need more disks. 3
>> disk raid 5 is not a good setup for performance.  I would say 5 is a
>> minimum.
>>
>> John
>
> Raid 5 is not a good setup for performance, full stop.
>

Its not good for database performance and random small writes but it
shines in large file operations. Either way a 3 disk raid5 (software
or hardware) should be able to generate 100MB/s sustained on linux so
this probably is not an issue.

John