Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
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 -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 198 bytes Desc: This is a digitally signed message part. URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20091027/abb27a33/attachment.pgp>