Hello,
i'm running drbd on two Debian Wheezy x64 servers.
I'm using protocol A for asynchronous sync, since one of the machines has a
hybrid RAID10 on an adaptec 71605Q. Build of 2x 3TB Seagate Constellation CS
SED and 2x Samsung 840 500GB. And the other only has a plain 1TB HDD.
If I run a simple dd test on the node with the RAID copying from /dev/zero to a
file on the device with drbd disabled, I get results around 400mb/s.
The moment I start drbd with the node as primary and run the test again, my
results are roughly 110mb/s.
Are there any known issues regarding this?
My configuration file for DRBD:
global { usage-count no; }
common {
startup {
wfc-timeout 0;
degr-wfc-timeout 120;
}
disk {
on-io-error detach;
no-disk-flushes;
no-md-flushes;
no-disk-barrier;
}
}
resource r0 { protocol A;
syncer {
rate 60M; }
net {
after-sb-0pri disconnect;
after-sb-1pri disconnect;
after-sb-2pri disconnect;
}
startup {
}
on jetfire {
device /dev/drbd0;
disk /dev/sda3;
address 192.168.253.1:7788
flexible-meta-disk internal;
}
on jetstorm {
device /dev/drbd0;
disk /dev/sda3;
address 192.168.253.2:7788;
flexible-meta-disk internal;
}
}
Thanks in advance
kind regards
Tim Rohwedder
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