[erlang-questions] clarify: why is Mnesia not fit for large databases

Dave Rafkind <>
Thu Dec 6 05:39:59 CET 2007


AFAIK mnesia has a hardcoded 2GB limit somewhere due to using 32-bit values
in some important place.

On Dec 5, 2007 6:18 PM, Dominic Williams <> wrote:

> Hello,
>
> In the recent discussion about BDB, several prominent
> members of the community were of the opinion that Mnesia is
> not fit for large databases.
>
> Is this still the case with fragmented tables?
>
> It was also suggested that for large volumes of stored,
> rarely consulted data, something like mysql is better, and
> Mnesia should be kept for realtime session data.
>
> What about when the realtime session tables are getting
> huge? Any reason not to use Mnesia in that case?
>
> Can someone clarify in what precisely makes Mnesia unfit for
> large databases? Is it scalability? Bugs? Maintenance hell?
>
>
> Thanks,
>
> Dominic Williams
> http://dominicwilliams.net
>
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