Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
I have two:
Intel Q6600 boxes with 4GB of RAM
8 x 750Gb (4,5TB RAID5EE, Adaptec 2820SA)
2 x 1Gbit Ethernet
eth0: LAN
eth1: DRBD SYNC (crosscable between machines)
/dev/sda2 ~4,5TB for DRBD
The problem is that, when I connect to an ftp/samba server on LAN (eth0)
and I start uploading a file. Transfer rate is about 20-40MB/s about
10-15 seconds, then it starts lagging, about 4-10MB/s. Transfer-rate
sleeps 0MB/s 5 seconds for example and all ftp transfers gets timeout.
I have monitored eth1 with iptraf, and it doesn't sync more that
6-10MB/s while drbd state is (cs:Connected st:Primary/Secondary
ds:UpToDate/UpToDate C r---).
When drbd does sync while other end has been offline for a while... sync
rate is about 20-25MB/s.
Ubuntu 8.04 Server
kernel : 2.6.24-19-server
drbd version: 8.0.11
----
drbd.conf:
global {
usage-count no;
}
common {
syncer { rate 33M; }
}
resource r0 {
protocol C;
handlers {
pri-on-incon-degr "echo o > /proc/sysrq-trigger ; halt -f";
pri-lost-after-sb "echo o > /proc/sysrq-trigger ; halt -f";
local-io-error "echo o > /proc/sysrq-trigger ; halt -f";
}
startup {
degr-wfc-timeout 120; # 2 minutes.
}
disk {
on-io-error detach;
}
net {
max-buffers 8192;
unplug-watermark 8192;
max-epoch-size 2048;
}
syncer {
rate 33M;
al-extents 2570;
}
on storage1 {
device /dev/drbd0;
disk /dev/sda2;
address 192.168.1.1:7788;
flexible-meta-disk internal;
}
on storage2 {
device /dev/drbd0;
disk /dev/sda2;
address 192.168.1.2:7788;
flexible-meta-disk internal;
}
}
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