Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
> > > > if its not that, > > then try to set the rate to some large figure (100M or something) > > the syncer in drbd 0.7.0 follows a weird timer based pattern, which I > > personally dislike, but in our test environments it did work... > > > > > Thanks for the suggestions! > > so I tried upgrading to 0.7.1 as suggested. But I'm still getting > 5MB/s performance... I am testing the same version (on 2.4.26 kernel) and have the same problem (sync speed <5MB/s). After changing from smp (hyperthreading P4) to up kernel, speed increased (one time it was 20MB/s, but mostly about 15MB/s which is still slow). Disks can do sequential 100MB/s read/write (stripped lvm) and crossover gigabit ethernet can do 100MB/s with ttcp . With tcpdump dumping packets I found that with smp kernel there were about aprox. 3 second gaps where no packets were on the wire. With up kernel there are smaller gaps about 1s (it can be normal, I don't know yet :-). Sequential writing to device gives 40MB/s, which is relatively good (but native is 2 times more :-). smp kernel (also at 1 processor only) also did deadlock when writing more data at once (about >80MB with dd or mkreiserfs on 1GB volume). Pavel Semerad