Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Yes I just do some test... But in a real enviroment this performance is preocuped... Is there some way "allow-two-primaries" work on Protocol A. Thanks On Tue, 27 Oct 2009 14:36:11 +0100, Stefan Seifert <nine at detonation.org> wrote: > On Tuesday 27 October 2009 15:09:02 gilberto.nunes wrote: > >> Drbd works fine but I attempt >> deploy virtual machine with KVM and I feel access to /dev/drb0 is >> slowing... > > So you've got two VMs running on the same host and sharing a drbd disk? > That will never be fast even if you do all the performance tuning that's > documented in the user's guide, the performance seminar, Flo's blog and > this > mailing list. > > Virtualization already slows down I/O access dramatically, because for > every > little request there are a few context switches involved. Same goes for > networking. With drbd you double your I/O requests and add networking on > top > of it. That's all the slowness you could possibly find on your system > combined. > > Using protocol A might improve the situation but with the obvious > disadvantages. But I assume this setup is only for testing anyway? So > don't > worry too much about performance now and get on to optimizing when it's > deployed on real hardware. Should make a huge difference. > > Regards, > Stefan -- Gilberto Nunes Ferreira TI Selbetti Gestão de Documentos Telefone: +55 (47) 3441-6004 Celular: +55 (47) 8861-6672 _"BENDITA A NAO CUJO DEUS O SENHOR!"_ <