I don't know of my opinion matter, but
+1
Ext3 is reverse-compatible with ext2. (Assuming its not LVM) I can mount,
read and write an ext3 FS with a ext2 implementation.
I don't see this as helping interoperability so much as I see it helping
migrations. It is also interesting because, like it or not, I have ext3
FSes in zvols (which could be mounted with an ext2 implementation). I
haven't thought the implications through, but I'm sure I can come up with
some creative things to do on a clone or after unmounting the drive.
Andrew Hettinger
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[EMAIL PROTECTED] wrote on 12/10/2007 07:52:45 PM:
> +1
>
> I would have liked to have seen more discussion on the benefits
> to OpenSolaris by supporting ext2/3.
>
> Certainly it is a very interesting academic exercise to
> support this file system, and I am sure much will be learned
> by all who participate in this project
> from the creation of the necessary source code.
>
> But ext2 is basically obsolete.
> I think Red Hat Linux switched to ext3 back in 2002/3.
> So I think ext2 will only be used by a very small minority.
>
> And even if we get to a stage of ext3 support there is still
> the issue that Cyril pointed to, that LVM is now used by
> default by many Linux distributions.
>
> And the Linux people are working on ext4...
>
> The OpenSolaris ext3 project will need to provide very high
> quality code and must be rigorously tested to
> avoid any nasty data corruption issues.
> (I assume we are talking about full read/write here.)
>
> So there is a lot of work to be done before we have
> anything that is really useful in today's world.
>
> Even then, Milan Jurik warns that:
> > Sharing home directories between two OSes can be dangerous, because
some
> > applications can be surprised that their configs are for other versions
> > of them.
>
> Do people see this ext2/3 as helping interoperability?
> But then this is only an issue if you want to share data between
> partitions on the same PC, when dual-booting Linux & Solaris.
> Do many people really want/need to do this?
>
> Surely most people will have separate PC's for Linux and
> Solaris and share data with something like NFS across the network.
>
> Is it the idea that the ext2/3 filesystem will be a viable
> alternative to UFS (or ZFS) when installing/booting OpenSolaris?
>
> Has anyone yet ascertained if there is any documentation for ext3 ?
>
> Hopefully the project page will link to the documentation for ext2.
>
> Will the GNU e2fsprogs need some patching to run on OpenSolaris?
> Are the underlying API's different on Solaris to Linux?
>
> Regards
> Nigel Smith
>
>
> This message posted from opensolaris.org
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