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Date:      Mon, 5 Feb 2001 19:30:44 +0100 
From:      Michael Aronsen <mar@netcentralen.dk>
To:        "'fs@freebsd.org'" <fs@freebsd.org>
Subject:   SV: Extremely large (70TB) File system/server planning
Message-ID:  <9164771DDCABD3118333005004E9446E2B7784@mother.netcentralen.dk>

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How about an SGI system - XFS is claimed to have no size limit?

//Michael Aronsen

-----Oprindelig meddelelse-----
Fra: Kurt J. Lidl [mailto:lidl@pix.net]
Sendt: 5. februar 2001 19:21
Til: Matt Dillon; Michael C . Wu
Cc: Mitch Collinsworth; hackers@FreeBSD.ORG; fs@FreeBSD.ORG
Emne: Re: Extremely large (70TB) File system/server planning


On Mon, Feb 05, 2001 at 09:50:35AM -0800, Matt Dillon wrote:
> :70TB is the size of the sum of all files, access or no access.
> :(They still want to maintain accessibility even though the chances are
slim.)
> 
>     This doesn't sound like something you can just throw together with
>     off-the-shelf PCs and still have something reliable to show for it.
>     You need a big honking RAID system - maybe a NetApp, maybe something
>     else.  You have to look at the filesystem and file size limitations
>     of the unit and the client(s).

NetApp's biggest box can "only" handle 6TB of data, currently, using the
latest and greatest software.  They claim (and I believe them) that
12TB will be the limit later this year.

>     So FreeBSD could be used as an NFS client, but probably not a server
>     for your application.  Considering the number of disks you need to
>     manage, something like a NetApp or other completely self contained
>     RAID-5-capable system for handling the disks is mandatory.

Netapps are actually RAID-4 (dedicated parity disk), not RAID-5 (parity data
is recorded across all drives).

-Kurt


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