Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
The 12MB/sec is the speed of 10Mbit with overhead. I'd say that the data was going out the wrong interface or the speed configuration isn't in the right place in the config file. On 6/20/07, Marcello Lupo <mlist at itspecialist.it> wrote: > > Hi, > thanks for answers. > Comments inline > > Siim Vahtre wrote: > > On Wed, 20 Jun 2007, Marcello Lupo wrote: > > > >> If i force the sync of the partitions to drbd with invalidate_remote > >> it do not go over 12 Mb/sec. > > > > This doesn't seem normal. > > > > > > Some obligatory questions: > > > > * Are you sure you actually have working fullduplex Gbit link? (check > > with ethtool) > > > Yes. > Settings for eth1: > Supported ports: [ MII ] > Supported link modes: 10baseT/Half 10baseT/Full > 100baseT/Half 100baseT/Full > 1000baseT/Half 1000baseT/Full > Supports auto-negotiation: Yes > Advertised link modes: 10baseT/Half 10baseT/Full > 100baseT/Half 100baseT/Full > 1000baseT/Half 1000baseT/Full > Advertised auto-negotiation: Yes > Speed: 1000Mb/s > Duplex: Full > Port: Twisted Pair > PHYAD: 1 > Transceiver: internal > Auto-negotiation: on > Supports Wake-on: g > Wake-on: d > Current message level: 0x000000ff (255) > Link detected: yes > > > * Are you sure you actually can write to your disks faster than > > 12Mbytes/sec? (try with benchmarking tool that comes with drbd 'dm.c') > > > I tried to copy with scp from one machine to the other a 4GB file and it > went at ~40Mb/s. > > Tool you said dm.c the documentation says that is untouched from version > 0.6 and not working currently with 0.7 version. > SOme times in cat /proc/drbd i see some peak of speed around 18/20 > Mb/sec but it is very rare. the average is everytime around 14/15 Mb/sec. > > Now i tried with bonnie++ and this is the result > > Version @version@ ------Sequential Output------ --Sequential > Input- --Random- > -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- > --Seeks-- > Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP > /sec %CP > host0 4G 40987 99 85422 33 45074 11 53951 99 120726 15 > 1152.6 2 > host0 4G 41007 99 88090 34 44630 11 53664 99 122682 16 > 1169.1 1 > ------Sequential Create------ --------Random > Create-------- > -Create-- --Read--- -Delete-- -Create-- --Read--- > -Delete-- > files:max:min /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP > /sec %CP > host0 16 17641 99 +++++ +++ 16958 99 19706 100 +++++ +++ > 16110 99 > host0 16 15767 76 +++++ +++ 17099 99 19778 99 +++++ +++ > 16256 10 > > > * Are you sure nothing else is writing to disks at the same time? > > > Yes the servers are not used at the moment. I'm just making all > preinstall tests of speed and so on before install. > > >> i tried with rate option to 50M,40M,30M and it is the same. > > > > * Did you drbdadm adjust after changing config? > > > I made drbd completely stop and start to be sure all the times i changed > the config. > > > > > * Have you searched the mailing-list archives? I think I have seen > > several questions like yours, maybe someone has already solved problem > > like this. > > > > > > I searched for something but found nothing that was usefull to me.. May > be i didn't searched so well. > > Thanks, > Bye, > Marcello > > _______________________________________________ > drbd-user mailing list > drbd-user at lists.linbit.com > http://lists.linbit.com/mailman/listinfo/drbd-user > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.linbit.com/pipermail/drbd-user/attachments/20070620/15a5e32e/attachment.htm>