Comment #5 on issue 787 by [email protected]: DRBD sync problems after downgrade from DRBD 8.4 to 8.3
http://code.google.com/p/ganeti/issues/detail?id=787

Okay, I did a manual DRBD installation now and noticed, that one of the disks had a corrupt GPT that I removed now. Apart from that all seemed normal and it's syncing now:

hp-vh-1:
[12:38] 0 root@hp-vh-1 /root $ cat /proc/drbd
version: 8.3.11 (api:88/proto:86-96)
srcversion: C0678379139A852E8263B22
 0: cs:Unconfigured
 1: cs:SyncSource ro:Primary/Secondary ds:UpToDate/Inconsistent C r-----
ns:304128 nr:0 dw:0 dr:304792 al:0 bm:18 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:23437799868 [>....................] sync'ed: 0.1% (22888476/22888772)Mfinish: 4882:52:29 speed: 1,312 (1,280) K/sec

hp-vh-2:
[12:38] 0 root@hp-vh-2 /root $ cat /proc/drbd
version: 8.3.11 (api:88/proto:86-96)
srcversion: C0678379139A852E8263B22
 0: cs:Unconfigured
 1: cs:SyncTarget ro:Secondary/Primary ds:Inconsistent/UpToDate C r-----
ns:0 nr:304128 dw:304128 dr:0 al:0 bm:18 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:23437799868 [>....................] sync'ed: 0.1% (22888476/22888772)Mfinish: 4882:52:29 speed: 1,312 (1,280) want: 250 K/sec


The speed is pretty bad. I'm using 2 bonded (LACP) Gigabit Ethernet Ports. Before (on the 8.4 setup) they completely saturated one link while transfering data, now I'm at roughly 10 Mbit/s:

[12:37] 1 root@hp-vh-1 /root $ vnstat -i bond1 -l
Monitoring bond1...    (press CTRL-C to stop)

   rx:       52 kbit/s    90 p/s          tx:    10.72 Mbit/s   920 p/s^C

But at least it works.




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