[DRBD-user] database on drbd

Curtis Tiffany curtis at reecemarketing.com
Wed Mar 10 15:31:15 CET 2004


I know I read it on the www.drbd.org site before putting drbd into use,
http://www.drbd.org/performance.html was one place.

> 
> 
> --On Monday, March 08, 2004 20:12:25 +0100 Lars Ellenberg 
> <Lars.Ellenberg at linbit.com> wrote:
> 
> [ Re: Protocol "B" ]
> 
>> And, though one might think it has better performance, and it was
>> *intended* to have better performance, benchmarks show that it
>> DOES NOT have better performance. We will eventually find out why,
>> and fix it.
>> Meanwhile: Use protocoll "C", and enjoy transactional semantics
>> *and* best performance for short distance links.
>>
>> "A" is for long distance / high latency links.
>> Using "B" does currently not gain anything, but degrades
>> throughput, and loses transactional semantics, so should be avoided.
> 
> 
> Perhaps a note to that effect can be added to the docs? We went with B 
> here because if both machines went down at once, we were hosed anyway, 
> and wanted better performance. *sigh* Time for another maintenance 
> window (and I just upgraded everything yesterday!)
> 




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