Hello again,

On a different topic....

I run DRBD Primary/Secondary with protocol A. Because performance is important, 
and I do not require the Secondary to be up to date to the millisecond. So if 
bad stuff happens to the primary node, I can expect the secondary node to be 
more or less up-to-date, depending on the amount of data that was still sitting 
in primary node's buffers.

Can I reasonably expect the secondary node to be clean in terms of order of 
writes, i.e. slighly outdated maybe yes but consistent up to that past moment 
in time?

Let's further assume I want even more performance and disable disk-barriers and 
disk-flushes on both nodes, disregarding the clear warning in the 
documentation, and the primary node crashes. Now I understand that consistency 
in terms of write order is not guaranteed anymore for data on the primary node. 
So the data on the primary node can be considered junk after a crash / failure.

But the data on the secondary node should still be fine, slightly outdated 
maybe, but consistent. So as long as the primary node is fenced and the data 
there invalidated, life should be good. Correct?

thanks,

Andreas
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