Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Wed, 12 Mar 2008, Whit Blauvelt wrote: >> What version of DRBD are you using? What does drbd.conf say? Have you >> verified latency and throughput on your Gb interfaces independently of >> DRBD? Have you verified idle sync speed with no other operations happening >> on the DRBD devices (without them being mounted)? What does /proc/drbd say >> it's speed is? What distro are you using? Did you compile from source or >> get the rpms from a repository? > > Ah yes, versions. This is on Ubuntu 7.10, which is only up to 8.0.3. It's > from the deb except for the kernel module, which is compiled from a source > deb. The interfaces are fine. Using drbdsetup to up the syncer rate looks to > have just sped the process, although what /proc/drbd shows for speed - well, > it looks like that's an average over time, so it's still quite low but > rising. The DRBD devices aren't currently mounted. Sounds good. :-) >> No, I've tested it with devices/volumes up to hundreds of GB. One thing >> that did cause me problems is an upgrade from 8.0.8 to 8.0.11+, though. The >> performance went through the floor, probably to similar levels that you are >> seeing. I'm back to 8.0.8 and it's all working happily again. What version >> of DRBD are you running? Try downgrading to 8.0.8 (including the kernel >> module) and see if the problem goes away. > > Thanks for the reassuring report. Is 8.0.8 golden, then? Or is it just that > I should not have followed the draft manual's example of not setting a > syncer rate before the initial sync? 8.0.8 works for me, although I have not seen any reports of other people having similar problems with 8.0.11 yet. By all means try it and see if it works for you. Gordan