Hi Dave, Thanks for all the help - The default log rotation time for ubuntu seems to be 7 days so it seems this will remain a mystery.
A dedicated cross over for replication is not an option because the web servers connect to the DB over the same link. Is it possible to add the public interface as a second replication interface? Do I simply add it in the .res file with the existing ip address? The setup was primary/primary uptodate/uptodate before I copied the sites across. It then sat for a couple weeks doing nothing untill this week when dev tested on it and this hapenned. L On 17 February 2012 14:01, David Coulson <[email protected]> wrote: > > > On 2/17/12 6:56 AM, Lawrence Strydom wrote: > > Couldn't find any PingAck's in the syslog - what else could have caused > the split brain? > > > ./syslog.2:Feb 15 13:40:35 web02 kernel: [ 16.455206] block drbd0: self > D3CCDACF6FD7FDB8:4579E80074D400D3:C117CFF0A5777F0F:0000000000000004 > bits:14607528 flags:0 > ./syslog.2:Feb 15 13:40:35 web02 kernel: [ 16.455211] block drbd0: peer > 37C841BC2AA49AC4:4579E80074D400D3:C117CFF0A5777F0F:0000000000000004 > bits:1407177 flags:0 > ./syslog.2:Feb 15 13:40:35 web02 kernel: [ 16.455215] block drbd0: > uuid_compare()=100 by rule 90 > ./syslog.2:Feb 15 13:40:35 web02 kernel: [ 16.455217] block drbd0: > Split-Brain detected, dropping connection! > > Was this ever really primary/primary, uptodate/uptodate? I can't find > anything in the logs indicating that it was ever truly dual primary. Your > logs seem to rotate quickly, so if you are really only keeping logs going > back three days you'll probably never know root cause. > > Personally, I'd bypass the switch and go with a cross-connect direct between > the boxes - Or two if you have enough NICs. > >
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