Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Mon, 26 Jan 2004, Dave Dunkin wrote: > On Jan 26, 2004, at 4:26 PM, Lars Ellenberg wrote: > > > / 2004-01-26 15:48:14 -0600 > > \ dave at gottathink.com: > >> Quoting Lars Ellenberg <Lars.Ellenberg at linbit.com>: > >> > >>> / 2004-01-25 23:38:08 -0800 > >>> \ Dave Dunkin: > >>>> I've got drbd set up on two RedHat 9 nodes with 60GB software RAID1 > >>>> devices I'm trying to mirror. I started it up for the first time > >>>> and it > >>>> started with a SyncAll from the primary to the secondary at around > >>>> 10MB/sec (on a private 100Mbps network). Then at almost exactly 30% > >>>> though the sync, the sync speed dropped to an abysmal 500KB/sec. > >>>> I've > >>>> tried upping the minimum and setting the nice level, but nothing > >>>> seems > >>>> to improve the situation. I tried stopping and restarting the sync > >>>> process and the same thing happened at 30%. I am repeating myself (have a look at the list archive, it might even be a FAQ): I have seen this with cheap NICs. Switched to 3com cards and everything went fine afterwards. This was a long time ago (0.6.1_pre something). I do not know if this problem has ever been identified and solved and I do not know if DRBD is to blame for it at all. I never saw this problem with anything else than DRBD, though - this might be because only DRBD was able to saturate the link for long enough for the problem to appear. [ snip ] peter