Dear All,
Doing a new set-up of DRBD on Ubuntu LTS 14.04 with stock DRBD
When Setting to protocol A i get double the bandwidth as protocol C anybody an
idea? not changing anything else of the settings except the protocol
PROTOCOL C:
d if=/dev/zero of=/dev/drbd0 bs=1M count=20000 oflag=direct
20000+0 records in
20000+0 records out
20971520000 bytes (21 GB) copied, 46.3583 s, 452 MB/s
PROTOCOL A:
dd if=/dev/zero of=/dev/drbd0 bs=1M count=20000 oflag=direct
20000+0 records in
20000+0 records out
20971520000 bytes (21 GB) copied, 23.8356 s, 880 MB/s
drbdsetup show r0 --show-defaults
resource r0 {
options {
cpu-mask ""; # default
on-no-data-accessible io-error; # default
}
net {
protocol C; # default
timeout 60; # 1/10 seconds, default
max-epoch-size 8000;
max-buffers 8000;
unplug-watermark 16;
connect-int 10; # seconds, default
ping-int 10; # seconds, default
sndbuf-size 2097152; # bytes
rcvbuf-size 2097152; # bytes
ko-count 7; # default
allow-two-primaries no; # default
cram-hmac-alg ""; # default
shared-secret ""; # default
after-sb-0pri disconnect; # default
after-sb-1pri disconnect; # default
after-sb-2pri disconnect; # default
always-asbp no; # default
rr-conflict disconnect; # default
ping-timeout 5; # 1/10 seconds, default
data-integrity-alg ""; # default
tcp-cork yes; # default
on-congestion block; # default
congestion-fill 0s; # bytes, default
congestion-extents 1237; # default
csums-alg ""; # default
verify-alg ""; # default
use-rle yes; # default
}
_remote_host {
address ipv4 172.16.252.8:7789;
}
_this_host {
address ipv4 172.16.252.7:7789;
volume 0 {
device minor 0;
disk "/dev/sdb";
meta-disk internal;
disk {
size 0s; # bytes, default
max-bio-bvecs 0; # default
on-io-error detach; # default
fencing resource-only;
disk-barrier no; # default
disk-flushes no;
disk-drain yes; # default
md-flushes yes; # default
resync-rate 250k; # bytes/second, default
resync-after -1; # default
al-extents 3389;
al-updates yes; # default
c-plan-ahead 20; # 1/10 seconds, default
c-delay-target 10; # 1/10 seconds, default
c-fill-target 100s; # bytes, default
c-max-rate 102400k; # bytes/second, default
c-min-rate 250k; # bytes/second, default
disk-timeout 0; # 1/10 seconds, default
read-balancing prefer-local; # default
}
}
}
}
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