[DRBD-user] Slow sync rate after upgrade to 8.3.12

David Mohr damailings at mcbf.net
Wed Nov 16 01:40:31 CET 2011

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.


Hi,

after successfully upgrading from 8.3.7 to 8.3.12 (thanks again for the 
help from the list), we notice very slow sync speeds:

$ cat /proc/drbd
version: 8.3.12 (api:88/proto:86-96)
GIT-hash: e2a8ef4656be026bbae540305fcb998a5991090f build by root at s1a, 
2011-11-15 22:13:28
  0: cs:SyncTarget ro:Secondary/Primary ds:Inconsistent/UpToDate C 
r-----
     ns:0 nr:2466144 dw:2466144 dr:0 al:0 bm:663 lo:0 pe:6241 ua:0 ap:0 
ep:1 wo:b oos:1039000
         [========>...........] sync'ed: 49.0% (1039000/2031448)K
         finish: 0:03:39 speed: 4,728 (6,616) want: 51,200 K/sec

This is on a direct trunk between the two machines. With 8.3.7 we could 
increase the sync speed to 120M/s and drbd would use it full speed. We 
didn't change anything aside from drbd kernel module and userland.

Any pointers?

Thanks,
~David




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