[DRBD-user] Replication for disaster recovery

Eliezer Croitoru eliezer at ngtech.co.il
Mon Apr 28 21:42:13 CEST 2014

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

On 04/28/2014 02:31 PM, Velko wrote:
> Well, I'll make sure to configure everything to avoid split-brain.
> Hence, this thread.:)  Also, I looked at csync2 and it really looks good
> for what I need.
>> >So what would you use it? nfs? sambe? ISCSI ? others?
> Just regular local partition.

If you have a primary and secondary note that once one of them 
recognizes that there is no connection to the other it should force it 
self into a state of "not running".
In the case you have a reliable WAN connection which never make any 
problems of connectivity then DRBD is good and I would say that you will 
want to change the status manually.

If you have a direct connection between the machines so that they both 
can know always each other state in a "mesh" like connectivity(2 wans on 
separated carriers) then you probably are in a good state and the only 
time you would get a split-brain situation is when the network 
connectivity between the two is being "split" or "down".

You can always force the primary to get into a "bad" connection 
situation which prevents an after "split-brain" issues.

I am almost sure that DRBD is for you.
(this is a DRBD list right? cannot talk about other things?)


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