Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hi Regads, please help me.
I'm inexperienced with drbd, for testing purpose I have created two virtual
machine with drbd 8.4.0(and 8.3.9.12) on the same pc, it's run very well.
The probelm is the speed sync rate, it does not exceed 100 k/Sec.
tests were performed with the Vmware NAT and Vmware Bridge connection.
The hard disk is a ssd, and it write to 300mb/sec.
Why my sync rate is very slow?
NC and Iperf are very fast transfert file, why drbd is slow??
PLEASE HELP ME
*This is my drbd config:*
common {
protocol C;
startup {
degr-wfc-timeout 0; #wait forever
}
disk {
on-io-error detach;
fencing dont-care;
}
syncer {
rate 33M;
al-extents 1801; #def 127 (must be a prime number)
verify-alg md5;
}
net {
sndbuf-size 512k;
timeout 60 ;
connect-int 10 ;
ping-int 10 ;
ko-count 10;
max-epoch-size 257;
}
}
resource r0 {
on master {
volume 0 {
device /dev/drbd0;
disk /dev/sdb5;
flexible-meta-disk internal;
}
address 192.168.139.132:7789;
}
on slave {
volume 0 {
device /dev/drbd0;
disk /dev/sdb5;
flexible-meta-disk internal;
}
address 192.168.139.133:7789;
}
}
*This is drbd transfert:*
Every 2.0s: cat /proc/drbd
Wed Nov 30 11:49:36 2011
version: 8.4.0 (api:1/proto:86-100)
GIT-hash: 28753f559ab51b549d16bcf487fe625d5919c49c build by dag at Build64R6,
2011-08-12 09:40:17
0: cs:SyncSource ro:Primary/Secondary ds:UpToDate/Inconsistent C r-----
ns:35646712 nr:0 dw:68 dr:35651401 al:8 bm:2179 lo:1 pe:3 ua:5 ap:0 ep:1
wo:b oos:19412724
[>...................] sync'ed: 7.5% (18956/20472)M
finish: 0:04:39 speed: 69,528 (67,448) K/sec
*This is iperf test:*
Client connecting to 192.168.139.132, TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.139.133 port 26031 connected with 192.168.139.132 port
5001
[ 5] local 192.168.139.133 port 5001 connected with 192.168.139.132 port
15000
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 1.26 GBytes 1.08 Gbits/sec
[ ID] Interval Transfer Bandwidth
[ 5] 0.0-10.0 sec 1.14 GBytes 977 Mbits/sec
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