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From: Andreas Pokorny (andreas.pokorny_at_[hidden])
Date: 2005-09-30 16:07:16

On Thu, Sep 29, 2005 at 09:18:28PM +0100, Calum Grant <calum_at_[hidden]> wrote:
> > [mailto:boost-bounces_at_[hidden]] On Behalf Of Andreas Pokorny
> > On Wed, Sep 28, 2005 at 10:50:51PM +0100, Calum Grant
> > <calum_at_[hidden]> wrote:
> > > > Furthermore you could implement a table that can be stored in
> > > > a file, and used wihout reading all records into memory.
> > >
> > > I think the memory-mapped file route would be the most
> > profitable, it
> > > would probably already work.
> >
> > Interesting, could you give a short overview, how it could
> > already work.
> You could use an allocator with RML (or indeed any STL container) that
> stores the data in a memory-mapped file. This basically makes the data
> persistent.

That simple? I feared there is more to it. Sounds like RML is written
with a lot of care.

> I actually had a project a while back that did such a thing, and got
> some good benchmarks comparing MySQL vs file-mapped containers:

Looks impressive.

> and I'm sure boost::shmem::allocator is similar. Performance is very
> good. We could devise a benchmark and I'll implement in RML +
> Persist/Shmem, you implement in SQLlite and we'll see the difference.

Yeah. When do you plan to submit RML to boost?
I would really love to see such a library in boost.


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