ReactOS File System

[Rick Langschultz]

I am writing a file system for personal development use for reactos.  
I want to take a poll about what File System features that ReactOS  
would like to implement in its distribution. Are there any features  
out there that ReactOS developers like to implement in ReactOS. I  
want to model the file system on NTFS but i have been looking at  
Sun's ZFS and think that it would be a great File System for React...

Another thing... How is the code audit going?

[Jerry]

I've been wanting to try my hand at file systems too. Have you looked at 
ext2/3 for insporation?

Rick Langschultz wrote:
> I am writing a file system for personal development use for reactos.  
> I want to take a poll about what File System features that ReactOS  
> would like to implement in its distribution. Are there any features  
> out there that ReactOS developers like to implement in ReactOS. I  
> want to model the file system on NTFS but i have been looking at  
> Sun's ZFS and think that it would be a great File System for React...
>
> Another thing... How is the code audit going?
> _______________________________________________
> Ros-dev mailing list
> [e-mail]
> http://www.reactos.org/mailman/listinfo/ros-dev
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[Rick Langschultz]

I have actually looked at the EXT2 and EXT3 file systems, and admire  
them, however Reiser4 and ZFS are the best looking and they have  
great specs such as file access time, etc. Also, ZFS supports many  
things NTFS supports. Though I would love to have ReactOS support  
things like lower level file system rollback, file junctions,  
symlinks, etc...
On Feb 14, 2006, at 4:02 PM, Jerry wrote:
> I've been wanting to try my hand at file systems too. Have you  
> looked at ext2/3 for insporation?
>
> Rick Langschultz wrote:
> > I am writing a file system for personal development use for  
> > reactos.  I want to take a poll about what File System features  
> > that ReactOS  would like to implement in its distribution. Are  
> > there any features  out there that ReactOS developers like to  
> > implement in ReactOS. I  want to model the file system on NTFS but  
> > i have been looking at  Sun's ZFS and think that it would be a  
> > great File System for React...
> >
> > Another thing... How is the code audit going?
> > _______________________________________________
> > Ros-dev mailing list
> > [e-mail]
> > http://www.reactos.org/mailman/listinfo/ros-dev
>
> -- 
> Listen to Americas Debate Radio at 9 o'clock eastren on Wensdays!  
> http://radio.americasdebate.net/listen/low (Dial Up)
> http://radio.americasdebate.net/listen/    (BroadBand)
>
> Call in at:
> 1-888-DEBATE-5
> 1-912-342-2345
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[TwoTailedFox]

You won't see ZFS until Sun licenses Solaris under the GPL.

On 2/14/06, Rick Langschultz [e-mail] wrote:
> I have actually looked at the EXT2 and EXT3 file systems, and admire
> them, however Reiser4 and ZFS are the best looking and they have
> great specs such as file access time, etc. Also, ZFS supports many
> things NTFS supports. Though I would love to have ReactOS support
> things like lower level file system rollback, file junctions,
> symlinks, etc...
> On Feb 14, 2006, at 4:02 PM, Jerry wrote:
> > I've been wanting to try my hand at file systems too. Have you
> > looked at ext2/3 for insporation?
> >
> > Rick Langschultz wrote:
> > > I am writing a file system for personal development use for
> > > reactos.  I want to take a poll about what File System features
> > > that ReactOS  would like to implement in its distribution. Are
> > > there any features  out there that ReactOS developers like to
> > > implement in ReactOS. I  want to model the file system on NTFS but
> > > i have been looking at  Sun's ZFS and think that it would be a
> > > great File System for React...
> > >
> > > Another thing... How is the code audit going?
> > > _______________________________________________
> > > Ros-dev mailing list
> > > [e-mail]
> > > http://www.reactos.org/mailman/listinfo/ros-dev
> >
> > --
> > Listen to Americas Debate Radio at 9 o'clock eastren on Wensdays!
> > http://radio.americasdebate.net/listen/low (Dial Up)
> > http://radio.americasdebate.net/listen/    (BroadBand)
> >
> > Call in at:
> > 1-888-DEBATE-5
> > 1-912-342-2345
> > Skype: callto://americasdebate
> >
> > Ros-dev mailing list
> > [e-mail]
> > http://www.reactos.org/mailman/listinfo/ros-dev
>
> Ros-dev mailing list
> [e-mail]
> http://www.reactos.org/mailman/listinfo/ros-dev

--
"I had a handle on life, but then it broke"

[Jerry]

Those are all good ideas, but I think the file system needs to be highly 
flexible too. I have a few ideas that I would like to a file system. I 
think a varible cluster address size would be good too.

Rick Langschultz wrote:
> I have actually looked at the EXT2 and EXT3 file systems, and admire  
> them, however Reiser4 and ZFS are the best looking and they have  
> great specs such as file access time, etc. Also, ZFS supports many  
> things NTFS supports. Though I would love to have ReactOS support  
> things like lower level file system rollback, file junctions,  
> symlinks, etc...
> On Feb 14, 2006, at 4:02 PM, Jerry wrote:
> > I've been wanting to try my hand at file systems too. Have you  
> > looked at ext2/3 for insporation?
> >
> > Rick Langschultz wrote:
> > > I am writing a file system for personal development use for  
> > > reactos.  I want to take a poll about what File System features  
> > > that ReactOS  would like to implement in its distribution. Are  
> > > there any features  out there that ReactOS developers like to  
> > > implement in ReactOS. I  want to model the file system on NTFS but  
> > > i have been looking at  Sun's ZFS and think that it would be a  
> > > great File System for React...
> > >
> > > Another thing... How is the code audit going?
> > > _______________________________________________
> > > Ros-dev mailing list
> > > [e-mail]
> > > http://www.reactos.org/mailman/listinfo/ros-dev
> >
> > -- 
> > Listen to Americas Debate Radio at 9 o'clock eastren on Wensdays!  
> > http://radio.americasdebate.net/listen/low (Dial Up)
> > http://radio.americasdebate.net/listen/    (BroadBand)
> >
> > Call in at:
> > 1-888-DEBATE-5
> > 1-912-342-2345
> > Skype: callto://americasdebate
> >
> > Ros-dev mailing list
> > [e-mail]
> > http://www.reactos.org/mailman/listinfo/ros-dev
>
> Ros-dev mailing list
> [e-mail]
> http://www.reactos.org/mailman/listinfo/ros-dev
-- 
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Call in at:
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[D. Hazelton]

On Tuesday 14 February 2006 17:46, Rick Langschultz wrote:
> I have actually looked at the EXT2 and EXT3 file systems, and admire
> them, however Reiser4 and ZFS are the best looking and they have
> great specs such as file access time, etc. Also, ZFS supports many
> things NTFS supports. Though I would love to have ReactOS support
> things like lower level file system rollback, file junctions,
> symlinks, etc...

At this point Reiser4, to my knowledge (and from tracking it's progress 
towards integration into the Linux kernel), is not ready for production use. 
If you really want an NTFS style filesystem, I remember seeing the 
documentation behind OS/2's HPFS a long time ago...

As anyone that has tracked the history of NT knows, NTFS started from HPFS and 
diverged. (Hell, it even uses the same OS Id flag in the partition table)

One problem with implementing a filesystem like that is that you can either go 
IBM's route where the OS periodically "cleans up" the filesystem (and locks 
the machine in the process) or just do as M$ did and lose that performance 
advantage.

Truth be told, a *Nix style filesystem is simpler and cleaner. And _most_ now 
have support for ACL's and other early advantages of NTFS. The only problem 
with a Unix style filesystem is that each filesystem does have a maximum 
number of files, though those limits are often hard to reach.

In any event I have done some (though by all means not exhaustive) research 
into filesystem design and am available to assist in any design (though not 
coding) people might wish to do. If NTFS support is wanted in ReactOS, the 
NTFS code in the Linux kernel does provide a good starting point. The 
read-only limitation Linux has is, IIRC, more related to the fact that the 
VFS layer cannot properly handle the multiple simultaneous updates needed to 
maintain consistency on an NTFS partition.
> On Feb 14, 2006, at 4:02 PM, Jerry wrote:
> > I've been wanting to try my hand at file systems too. Have you
> > looked at ext2/3 for insporation?
> >
> > Rick Langschultz wrote:
> > > I am writing a file system for personal development use for
> > > reactos.  I want to take a poll about what File System features
> > > that ReactOS  would like to implement in its distribution. Are
> > > there any features  out there that ReactOS developers like to
> > > implement in ReactOS. I  want to model the file system on NTFS but
> > > i have been looking at  Sun's ZFS and think that it would be a
> > > great File System for React...

<snip>

DRH

[Rick Langschultz]

I was reading about the Samba 4 implementation. It is embedded with  
an LDAP server that controls file ACLs that Windows Domain  
Controllers and Professional Systems implement. Through some serious  
hacking I bet a NT VFS over ZFS would make a great choice in file  
system. The file system allows for ACLs, rollback, and many other  
features which is an improvement over the FAT filesystem.
On Feb 14, 2006, at 8:41 PM, D. Hazelton wrote:
> On Tuesday 14 February 2006 17:46, Rick Langschultz wrote:
> > I have actually looked at the EXT2 and EXT3 file systems, and admire
> > them, however Reiser4 and ZFS are the best looking and they have
> > great specs such as file access time, etc. Also, ZFS supports many
> > things NTFS supports. Though I would love to have ReactOS support
> > things like lower level file system rollback, file junctions,
> > symlinks, etc...
>
> At this point Reiser4, to my knowledge (and from tracking it's  
> progress
> towards integration into the Linux kernel), is not ready for  
> production use.
> If you really want an NTFS style filesystem, I remember seeing the
> documentation behind OS/2's HPFS a long time ago...
>
> As anyone that has tracked the history of NT knows, NTFS started  
> from HPFS and
> diverged. (Hell, it even uses the same OS Id flag in the partition  
> table)
>
> One problem with implementing a filesystem like that is that you  
> can either go
> IBM's route where the OS periodically "cleans up" the filesystem  
> (and locks
> the machine in the process) or just do as M$ did and lose that  
> performance
> advantage.
>
> Truth be told, a *Nix style filesystem is simpler and cleaner. And  
> _most_ now
> have support for ACL's and other early advantages of NTFS. The only  
> problem
> with a Unix style filesystem is that each filesystem does have a  
> maximum
> number of files, though those limits are often hard to reach.
>
> In any event I have done some (though by all means not exhaustive)  
> research
> into filesystem design and am available to assist in any design  
> (though not
> coding) people might wish to do. If NTFS support is wanted in  
> ReactOS, the
> NTFS code in the Linux kernel does provide a good starting point. The
> read-only limitation Linux has is, IIRC, more related to the fact  
> that the
> VFS layer cannot properly handle the multiple simultaneous updates  
> needed to
> maintain consistency on an NTFS partition.
> > On Feb 14, 2006, at 4:02 PM, Jerry wrote:
> > > I've been wanting to try my hand at file systems too. Have you
> > > looked at ext2/3 for insporation?
> > >
> > > Rick Langschultz wrote:
> > > > I am writing a file system for personal development use for
> > > > reactos.  I want to take a poll about what File System features
> > > > that ReactOS  would like to implement in its distribution. Are
> > > > there any features  out there that ReactOS developers like to
> > > > implement in ReactOS. I  want to model the file system on NTFS but
> > > > i have been looking at  Sun's ZFS and think that it would be a
> > > > great File System for React...
>
> <snip>
>
> DRH
> _______________________________________________
> Ros-dev mailing list
> [e-mail]
> http://www.reactos.org/mailman/listinfo/ros-dev