Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
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? Andy --- Andy Dills Xecunet, Inc. www.xecu.net 301-682-9972 ---