Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hello all DRBDers,
Great product!
My DRBD setup is as follows:
2 hosts with each:
2x 1TB seagate SATA software RAID1
LVM on top of that
crossover gigabit link between the two.
My drbd.conf:
________________________________________________________________________
global {
usage-count yes;
}
common {
protocol C;
syncer { rate 50M; }
net {
startup { wfc-timeout 0 ; }
}
#####<I skip 6 drbd sections, similar setup as drbd7>
resource testlv {
device /dev/drbd7;
disk /dev/vg0/testlv;
meta-disk internal;
on baldur.mydomain.local {
address 10.99.99.1:7794;
}
on thor.mydomain.local {
address 10.99.99.2:7794;
}
}
________________________________________________________________________
the problem I am experiencing is that the maximum transfer rate is too
slow.
I get full through-put on the back-to-back gigabit ( 990Mb/sec )
as in the config file drbd7 mirrors a logical volume mounted on dom0
when i run dd on that lv:
# dd if=/dev/zero of=300meg.file bs=1M count=300 oflag=direct
300+0 records in
300+0 records out
314572800 bytes (315 MB) copied, 39.5295 seconds, 8.0 MB/s
I have tried no-disk-flush and no-md-flush.
When I use protocol A the maximum throughput is also only 8MB/sec,
but as soon as I run 'drbdadm disconnect all' on the secondary host, and
rerun the dd I get 32MB/sec!
Any tips would be greatly appreciated!
Kind regards,
Coert
PS I sent a mail prior to this with an attachment, but that is moderated
maybe?