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Wireless Networks Thread, Storage for 12,000 users in Technical; I've been put in charge of rolling out a VLE for the Local Authority and we're looking to provide e-portfolio ...
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    Storage for 12,000 users

    I've been put in charge of rolling out a VLE for the Local Authority and we're looking to provide e-portfolio space for upto 12,000 kids.

    It's a scary ammount of storage but I have no idea what kind of space we should be looking at per user, I suggested 1GB and got laughed at by my boss, does anyone know if BECTA has guidance on how much space to provide?

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    Re: Storage for 12,000 users

    Its only 11.718750 terabytes!

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    Re: Storage for 12,000 users

    They should just supply every kid with two, 512Mb memory sticks.

    One so use to store things on, one to mirror every day as their backup.

    Would be so much cheaper and easier!

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    Re: Storage for 12,000 users

    I got laughed at because my boss thought 1GB wasn't enough. He said 10GB but I can't see how each kid would use up 10GB of space.

    12TB isn't bad, but 120TB is getting rediculous!

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    Re: Storage for 12,000 users

    Have a look at the Storage Management section of FITS.

    http://www.becta.org.uk/fits_om/docu...management.pdf

    But to answer your specific question, what does the system spec your boss handed you say?

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    Re: Storage for 12,000 users

    Quote Originally Posted by indie
    I got laughed at because my boss thought 1GB wasn't enough. He said 10GB but I can't see how each kid would use up 10GB of space.

    12TB isn't bad, but 120TB is getting rediculous!
    I give all of our kids 50mb on our VLE and they never even use that!

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    Re: Storage for 12,000 users

    Just remember its storage cost plus the cost of a suitable backup system. A suitable backup system for 12TB that can complete in a resonsable time and hold multiple archives is not going to be cheap

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    Re: Storage for 12,000 users

    Realisitically I don't think we could afford a backup system for that ammount of space. I was just going to build multiple hot spares into the RAID array.

    I'm the one doing the spec Geoff, as usual my boss is an untechnical bod.

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    Re: Storage for 12,000 users

    Why not keep it under 700MB so it can easily be burned to a CD?

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    Re: Storage for 12,000 users

    Quote Originally Posted by indie
    Realisitically I don't think we could afford a backup system for that ammount of space. I was just going to build multiple hot spares into the RAID array.

    I'm the one doing the spec Geoff, as usual my boss is an untechnical bod.
    but RAID is not backup.

    rm -fR * will still delete everything on all disks quicker than you can shout "generic expletive!"

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    Re: Storage for 12,000 users

    Sounds like a job for the = : * *S A T A B E A S T * * : =

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    Re: Storage for 12,000 users

    I'm the one doing the spec Geoff, as usual my boss is an untechnical bod.
    Then you need to do a user analysis. This'll give you the information you need to work out the requirements.

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    Re: Storage for 12,000 users

    Coping for 12,000 users will always require a substantial investment.
    Is one of the project aims that the portforlio is used in preference to normal SMB shares?

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    Re: Storage for 12,000 users

    I would look at SAN (Storage Area Network) which allows for greater flexibility with storage allocation. If you do find that more storage is require then you can upgrade the san or add more disk to increate the overall storage.

    I guess with this you can start off with say giving each user 300-400mb space to see how much they use. If they require more then you can allocate more space and add more disks to san as i said. This will give you the chance to test out how much disk space is actually used rather than assuming how much they are going to use.

    SANs (espcially ISCSI) are becomming cheaper and a lot of vendors offers SANs that uses iSCSI i.e. Dell, HP, SimpleSAN etc.

    For the backup you can use autoloaders with LTO-3 Tapes which holds about 400Gb uncompressed! don't know how much you get with the compression probably 650Gb or maybe 700Gb.

    Have a look at the Dell Autoloader don't know the model but i think it has two magazines each allowing for upto 8 catridges.

    The educations discounts brings the prices to a reasonable level,

    HTH,

    Ashok.

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    Re: Storage for 12,000 users

    Realisitically I don't think we could afford a backup system for that ammount of space. I was just going to build multiple hot spares into the RAID array.
    I think you have to. RAID etc... is great for keeping availability due to the redundancy but it does nothing to prevent against data corruption.

    If some rogue piece of software or something corrupts a load of their work without a backup you can't recover it.

    Ben

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