Re: [Moosefs-users] How to calculate the memory should prepare for the master server?

[Roast <zha...@gm...>]

Tank you very much,Michał Borychowski and Laurent Wandrebeck.

And I think if there is a users list at the official site will be very
helpful for us. :)

2010/6/16 Michał Borychowski <mic...@ge...>

> > > We are plan to use moosefs at our product environment as the storage
> > > of our online photo service.
> > >
> > > But since we got that master server store all the metadata at memory,
> > > but we will store for about a hundred million photo files, so I wonder
> > > how much memory should prepare for the master server? And how to
> > > calculate this number?
> > According to FAQ, http://www.moosefs.org/moosefs-faq.html#cpu , at
> gemius,
> 8GB
> > ram is used by master for 25 millions files. So, for a hundred millions,
> you'd
> > need 32GB.
> [MB] Yes, that's right 32GB would be enough to keep metadata in RAM but in
> order that the whole system works smoothly you would need preferably 40-48
> GB of RAM in the master server.
>
>
> > > If the memory is not enough, what will happened with master server's?
> > I guess it'll swap.
> [MB] The performance of the whole system would be substantially lower.
>
>
> > > And I still wonder the performance about master server when use
> > > moosefs to store a hundred million photo files? Anyone can give me
> > > some more information?
> > I've no experience with such a large setup. I guess memory caching used
> to
> > prevent bottleneck on master will still do the trick.
> [MB] When you would have 40-48GB of RAM in the master server the system
> would have no problems with performance or stability.
>
> If you need any further assistance please let us know.
>
>
> Kind regards
> Michał Borychowski
> MooseFS Support Manager
> _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
> Gemius S.A.
> ul. Wołoska 7, 02-672 Warszawa
> Budynek MARS, klatka D
> Tel.: +4822 874-41-00
> Fax : +4822 874-41-01
>
>
>
>
> > regards,
> > --
> > Laurent Wandrebeck
> > HYGEOS, Earth Observation Department / Observation de la Terre
> > Euratechnologies
> > 165 Avenue de Bretagne
> > 59000 Lille, France
> > tel: +33 3 20 08 24 98
> > http://www.hygeos.com
> > GPG fingerprint/Empreinte GPG: F5CA 37A4 6D03 A90C 7A1D  2A62 54E6 EF2C
> D17C
> > F64C
>
>


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