Hi,
i've got a third setup running with drbd9 right now and i'm wondering
that performance in this new version of drbd is that slow. I see a lot
of traffic going on and then suddenly the traffic is slowing down.
drbdadm show then "congested:yes" on Secondard and "blocker:lower" on
primary device. the network is a gigabit network and with the same
servers and drbd8.3 i was able to get at least 80mb/s out of it. When
the status is like this the performance is near to 2mb/s for arround 2-5
minutes, then it boosts up for 20sec and slowing down again.
I also tested it with a crosslink connection.
The setup is quit normal and nothing tweaked yet.
Couldn't find the bottleneck.
global_common.conf:
global {
#usage-count yes;
# minor-count dialog-refresh disable-ip-verification
# cmd-timeout-short 5; cmd-timeout-medium 121; cmd-timeout-long
600;
}
common {
handlers {
# These are EXAMPLE handlers only.
# They may have severe implications,
# like hard resetting the node under certain
circumstances.
# Be careful when chosing your poison.
# pri-on-incon-degr
"/usr/lib/drbd/notify-pri-on-incon-degr.sh;
/usr/lib/drbd/notify-emergency-reboot.sh; echo b > /proc/sysrq-trigger ;
reboot -f";
# pri-lost-after-sb
"/usr/lib/drbd/notify-pri-lost-after-sb.sh;
/usr/lib/drbd/notify-emergency-reboot.sh; echo b > /proc/sysrq-trigger ;
reboot -f";
# local-io-error "/usr/lib/drbd/notify-io-error.sh;
/usr/lib/drbd/notify-emergency-shutdown.sh; echo o > /proc/sysrq-trigger
; halt -f";
# fence-peer "/usr/lib/drbd/crm-fence-peer.sh";
# split-brain "/usr/lib/drbd/notify-split-brain.sh
root";
# out-of-sync "/usr/lib/drbd/notify-out-of-sync.sh
root";
# before-resync-target
"/usr/lib/drbd/snapshot-resync-target-lvm.sh -p 15 -- -c 16k";
# after-resync-target
/usr/lib/drbd/unsnapshot-resync-target-lvm.sh;
}
startup {
wfc-timeout 20;
degr-wfc-timeout 20;
# outdated-wfc-timeout wait-after-sb
}
options {
# cpu-mask on-no-data-accessible
}
disk {
# size on-io-error fencing disk-barrier disk-flushes
# disk-drain md-flushes resync-rate resync-after
al-extents
# c-plan-ahead c-delay-target c-fill-target c-max-rate
# c-min-rate disk-timeout
}
net {
# protocol timeout max-epoch-size max-buffers
unplug-watermark
# connect-int ping-int sndbuf-size rcvbuf-size ko-count
# allow-two-primaries cram-hmac-alg shared-secret
after-sb-0pri
# after-sb-1pri after-sb-2pri always-asbp rr-conflict
# ping-timeout data-integrity-alg tcp-cork on-congestion
# congestion-fill congestion-extents csums-alg
verify-alg
# use-rle
protocol C;
}
}
r0.res:
resource r0 {
net {
cram-hmac-alg sha1;
shared-secret "Cwzvaerfyficjdh6";
}
volume 0 {
device /dev/drbd0;
disk /dev/sda3;
meta-disk internal;
}
on node1 {
node-id 0;
address 10.0.0.1:7000;
}
on node2 {
node-id 1;
address 10.0.0.2:7000;
}
connection {
host node1 port 7000;
host node2 port 7000;
net {
protocol C;
}
}
}
would be nice if anyone can help me with this issue.
kind regards
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