[DRBD-user] 8.3.7: UpToDate/UpToDate <-> UpToDate/Inconsistent

Ekkard Gerlach ekkardgerlach at aiai.de
Thu Nov 25 23:10:20 CET 2010


Hi, 

with 8.3.7 on two installations with 2.6.32-bpo.5-vserver-amd64 I get quite often
a asymmetric information about consistency. At the moment I have such a state: 

The primary site claims the other side to be inconsistent:
=================
prax1:/usr/local/bin# cat /proc/drbd
version: 8.3.7 (api:88/proto:86-91)
srcversion: EE47D8BF18AC166BE219757
[...]
 1: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r----
    ns:162940 nr:1059276 dw:1222244 dr:181593 al:153 bm:454 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:0
 2: cs:Connected ro:Primary/Secondary ds:UpToDate/Inconsistent C r----   <<<<<<< !!!!!! 
    ns:236984 nr:1053316 dw:1290300 dr:293697 al:344 bm:312 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:0
 3: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r----
    ns:9405744 nr:1053796 dw:10459724 dr:65097 al:5604 bm:387 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:0
[...]

The secondary thinks it is UpToDate:
=============
prax2:/usr/local/bin# cat /proc/drbd
version: 8.3.7 (api:88/proto:86-91)
srcversion: EE47D8BF18AC166BE219757
[...]
 1: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate C r----
    ns:0 nr:119628 dw:119628 dr:0 al:0 bm:4 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:0
 2: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate C r----   <<<<<<< !!!!!!!
    ns:0 nr:108308 dw:108308 dr:0 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:0
 3: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate C r----
    ns:0 nr:8902016 dw:8902016 dr:0 al:0 bm:77 lo:0 pe:0 ua:0 ap:0 ep:1 wo:b oos:0
[...]

Who tells the truth? 

The older system running since 3 months (on the same hardware) has had same problem 
at the beginning, say fist week. But never after. In this actual installation I'm 
in the first week. Perhaps DRBD becomes calm and wise after a week like a teenager with 
the 20's oder 30's? 

thx
Ekkard


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