[DRBD-user] secondary DRBD node shows UpToDate but is not

Bart Coninckx info at bitsandtricks.com
Mon Dec 26 16:08:16 CET 2016

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



-----Original message-----
From:Hayley Swimelar <hayley at linbit.com>
Sent:Fri 23-12-2016 07:36
Subject:Re: [DRBD-user] secondary DRBD node shows UpToDate but is not
To:drbd-user at lists.linbit.com; 
Hi Bart,

>On 12/21/2016 05:55 AM, Bart Coninckx wrote:
>> Hi all,
>> since a couple of years we have a 2 node DRBD cluster on CentOS 6.5 and
>> DRBD (version: 8.4.5 (api:1/proto:86-101)) installed from source. We
>> noticed that all DRBD resources show "UpToDate" on the secondary node,
>> but if we restart the service, one or more resources start syncing
>> again, indicating there seem to be differences in between the resources.
>> This is of course not desirable.

>How large are the resyncs? If you restarted the drbd service while 
>writes were coming in on the other node, a small resync (depending on 
>how many blocks were touched while the service was not running) would be 
>expected here.

They take up quite some time ( as in "minutes" not seconds). 

I just did a test again and, of course, at this point in time I do not see the problem. Will test later again,



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