Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On 01/11/2013 08:10 AM, Andy Dills wrote: > On Fri, 11 Jan 2013, Shaun Thomas wrote: > >> On 01/10/2013 11:49 PM, Andy Dills wrote: >> >>> So, it seems to me that even with the no-disk-barrier and no-disk-flushes, >>> when I am connected, I am limited (write speed) to the speed of the >>> network connection. >> >> These options are only so you're not *also* constrained by buffer flushing and >> barrier operations. In the default protocol C, all writes must be synced on >> both nodes before they're successful. That means your writes will be, at most, >> the speed of your network interface. >> >> We use dual 10Gb NICs on all of our servers, and bond them to separate >> switches for redundancy. I didn't want to go overboard so I gave DRBD a >> bandwidth limit, but I can get 350MBps from each of the 2 DRBD devices I have >> set up on our servers, and have plenty left over. >> >> I really wouldn't suggest running DRBD *without* a 10Gb NIC. > > Thank you, this is what I was starting to suspect, but hadn't seen > explicitly stated anywhere. > > Any positive recommendations on 10Gb NICs? We use Intel x520 DA2 SFP+ cards and they are excellent. > > Andy > > --- > Andy Dills > Xecunet, Inc. > www.xecu.net > 301-682-9972 > --- > _______________________________________________ > drbd-user mailing list > drbd-user at lists.linbit.com > http://lists.linbit.com/mailman/listinfo/drbd-user > -- Regards, Nik Nik Martin nfina Technologies, Inc. +1.251.243.0043 x1003 http://nfinausa.com Relentless Reliability