Hey Tim,
I'll admit I just quoted the blog without checking, I seem to remember the
sales rep I spoke to recommending putting aside 20-50% of my disk for
snapshots. Compared to ZFS where I don't need to reserve any space it feels
very old fashioned. With ZFS, snapshots just take up as much space as I want
them to.
The problem though for our usage with NetApp was that we actually couldn't
reserve enough space for snapshots. 50% of the pool was their maximum, and
we're interested in running ten years worth of snapshots here, which could see
us with a pool with just 10% of live data and 90% of the space taken up by
snapshots. The NetApp approach was just too restrictive.
Ross
> Date: Sun, 31 Aug 2008 08:08:09 -0700
> From: [EMAIL PROTECTED]
> To: [EMAIL PROTECTED]; zfs-discuss@opensolaris.org
> Subject: Re: [zfs-discuss] EMC - top of the table for efficiency, how well
> would ZFS do?
>
> Netapp does NOT recommend 100 percent. Perhaps you should talk to
> netapp or one of their partners who know their tech instead of their
> competitors next time.
>
> Zfs, the way its currently implemented will require roughly the same
> as netapp... Which still isn't 100.
>
>
>
> On 8/30/08, Ross <[EMAIL PROTECTED]> wrote:
> > Just saw this blog post linked from the register, it's EMC pointing out that
> > their array wastes less disk space than either HP or NetApp. I'm loving the
> > 10% of space they have to reserve for snapshots, and you can't add more o_0.
> >
> > HP similarly recommend 20% of reserved space for snapshots, and NetApp
> > recommend a whopping 100% (that was one reason we didn't buy NetApp
> > actually).
> >
> > Could anybody say how ZFS would match up to these figures? I'd have thought
> > a 14+2 raid-z2 scheme similar to NFS' would probably be fairest.
> >
> > http://chucksblog.typepad.com/chucks_blog/2008/08/your-storage-mi.html
> >
> > Ross
> > --
> > This message posted from opensolaris.org
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> > zfs-discuss mailing list
> > zfs-discuss@opensolaris.org
> > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
> >
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