Wow so that was a massive speedup.
Resync speeds are up around 300-400MB/s, still way below peak disk/ethernet speeds but I am being limited here by the
SSD read cache on our LSI controller, shame it does not understand massive streaming reads and bypass the cache drives.
Writing a file to disk (drbd disconnected) hits around 1-2GB/s, reading with SSD cache enabled is around 300-400MB/s and
off it then goes up to 1-2GB/s.
Emmanuel Florac wrote on 05/01/2016 10:53:
Le Mon, 4 Jan 2016 16:48:53 +0000
Ricardo Branco <[email protected]> écrivait:
Resync seems to always be limited to max 40MB/s, if I am doing both
of my resources at the same time then both are at 40MB/s (total 80M),
but never goes above this.
Yes, this looks like some default settings. Apparently you're using all
defaults, with some obsolete settings added (won't do any good), here's
the config I'm running (~700 MB/s throughput on 10GigE):
global_common.conf:
global {
usage-count no;
# minor-count dialog-refresh disable-ip-verification
}
common {
handlers {
}
startup {
# wfc-timeout degr-wfc-timeout outdated-wfc-timeout
wait-after-sb # wfc-timeout 20;
}
disk {
on-io-error detach;
no-disk-flushes ;
no-disk-barrier;
c-plan-ahead 0;
c-fill-target 24M;
c-min-rate 80M;
c-max-rate 720M;
}
net {
max-buffers 36k;
sndbuf-size 1024k ;
rcvbuf-size 2048k;
}
syncer {
rate 4194304k; # bytes/second
al-extents 6433;
}
}
cluster.res:
resource rd0 {
protocol C;
on cl1 {
device /dev/drbd0;
disk /dev/sda4;
address 192.168.42.1:7788;
meta-disk internal;
}
on cl2 {
device /dev/drbd0;
disk /dev/sda4;
address 192.168.42.2:7788;
meta-disk internal;
}
}
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