[erlang-questions] Fw: Berkely DB was: MySQL cluster

t ty <>
Sat Oct 21 15:54:30 CEST 2006


Emil's paper "Evaluation of Database Management Systems for Erlang" at

http://www.erlang-consulting.com/aboutus/erlangarticles.html

covers some of the issues.

t

On 10/21/06, Valentin Micic <> wrote:
> Could anyone indicate what are main issues with Berkeley DB, assuming that
> one does not require SQL nor flexible data-model?
>  Thanks in advance.
>
>  V.
>
> > ----- Original Message -----
> > From: "Roberto Saccon" <>
> > To: "Christian S" <>
> > Cc: <>
> > Sent: Friday, October 20, 2006 7:18 PM
> > Subject: Re: [erlang-questions] MySQL cluster
> >
> >
> >>I had the same question and I am currently investigating in using
> >> mnesia just as cache for a clustered web application running on amazon
> >> EC2 and the real storage is on amazon S3 (which is kind of  Berkley DB
> >> webservice) and capable to store any number of TBs ...
> >>
> >> On 10/20/06, Christian S <> wrote:
> >>> On 10/20/06, Dmitrii Dimandt <> wrote:
> >>> > What's the optimum maximum size for Mnesia then? A bout a couple of
> >>> > gigabytes? Or more?
> >>>
> >>> What should such a number for maximum size try to optimize?
> >>>
> >>> A note about picking database after storage size needs:
> >>>
> >>> Using mnesia instead of an external database always have advantages in
> >>> terms of "impedance matching" (Mnesia has erlang's datatypes by virtue
> >>> of being erlang and you can query mnesia faster than anything
> >>> connected to through tcp). This often makes it worthwile to hack
> >>> around mnesia to store some data outside of it.
> >>>
> >>> One would easily reach a storage size of 1Tb for a site like flickr.
> >>> Does that mean mnesia wouldnt be sufficient for building such a site?
> >>> Or perhaps it could be a good idea to build an application that
> >>> replicates images across nodes outside of mnesia, and have mnesia
> >>> store small image ids to reference them.
> >>> _______________________________________________
> >>> erlang-questions mailing list
> >>> 
> >>> http://www.erlang.org/mailman/listinfo/erlang-questions
> >>>
> >>
> >>
> >> --
> >> Roberto Saccon
> >> _______________________________________________
> >> erlang-questions mailing list
> >> 
> >> http://www.erlang.org/mailman/listinfo/erlang-questions
> >
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