mnesia replication

Serge Aleynikov <>
Wed Aug 31 14:43:27 CEST 2005


Dan Gudmundsson wrote:
> chandru writes:
>  > Hi,
>  > 
>  > On 30/08/05, Serge Aleynikov <> wrote:
>  > > Hello,
>  > > 
>  > > Could someone comment on the effect of short network outages ( < 10-15
>  > > s) on mnesia replication and how to prevent the inconsistency
>  > > demonstrated in the example below?   I intentionally did not alter the
>  > > net_ticktime kernel parameter so that it would be greater than the
>  > > duration of the brief network outage.
>  > 
>  > You can't really prevent this inconsistency if you are using dirty
>  > operations. Have you tried the same test using transactions instead of
>  > dirty operations.
> 
> Since dirty_operation don't grab a lock you should be able see the same problem
> with a working network ..
> 
> Dirty is dirty, be aware of that.

Thanks, this makes sense to me now.  While I was attributing this 
artifact to a network loss, it indeed had nothing to do with the network 
setup.

-- 
Serge Aleynikov
R&D Telecom, IDT Corp.
Tel: (973) 438-3436
Fax: (973) 438-1464




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