[Samba] Throughput Constraints

Henrik Zagerholm henke at mac.se
Mon Jan 30 22:37:41 GMT 2006

Look at sendfile support.
It can drastically improve throughput.
30 jan 2006 kl. 21:13 skrev Doug VanLeuven:

> Baron Young wrote:
>> I hope I'm in the right place for this question.  I am in the  
>> process of creating a large scale production fileserver  
>> architecture for the purpose of serving very large files (~4.5GB)  
>> to a small number of clients (~200).  My assumptions to this point  
>> have been that my throughput would be constrained by hardware and  
>> not software, but I would like some validation of this thinking.   
>> I am hoping to achieve throughput rates of ~200MB/s using whatever  
>> hardware needed to achieve this (FC on the disk side, possible  
>> infiniband or multiple 1Gb ethernet links for network side).  CPU  
>> would be 2-4 3+ Ghz, 8-16GB mem (more if needed).  I've "heard"  
>> that my throughput using Samba could be limited to more like 80MB/ 
>> s but I'm not sure why this would be the case.
>>    Any experiences using Samba for throughput rates this high  
>> would be much appreciated.
> When I ran tests, I was using standard 32 bit PCI, two machines  
> connected by crossover cable, one intel server card and one  
> workstation card.
> My numbers were more like 180 MBytes download.
> Uploads were 50-80 MBytes.  This wasn't a samba issue, and was  
> reproducable between two 2000 windows machines.  Never figured why.
> Jumbo frames improved things, but can't be used in a mixed local  
> environment.
> Regards, Doug
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