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RE: XFS...Windows?

To: Yuji Saeki <yuji1@xxxxxxxx>, "xfs@xxxxxxxxxxx" <xfs@xxxxxxxxxxx>
Subject: RE: XFS...Windows?
From: Shaun Gosse <sgosse@xxxxxxx>
Date: Mon, 9 Dec 2013 16:16:38 +0000
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Thread-topic: XFS...Windows?

Wellâat the risk of jumping into something here:


âwould SGI be okay with thatâ: keep in mind this a community project. There are contributors to XFS here at SGI. There is also a lot of work done by employees of Redhat as well as other companies (and a few freelance / people interested regardless of current position). Anyhow, just a quibble to note that itâs not a question of what SGI dictates. Although I will note that Iâve actually raised the idea of XFS on Windows internally (here at SGI) and while itâs not a priority I would say thereâs at least some interest. At the least, if you build it, weâll certainly take a look at it. J


I saw an email a while back on this list that implied someone was trying to work on that iirc; I didnât see any follow-up from it. There are also some projects that look abandoned which tried to do this I recall from previous searches on this.


One of the suggestions I heard when I was considering this was to look at how the ext port on Windows works. That looks mildly inactive itself but should be good for comparison.


Internally, SGI has a proprietary system, CXFS, which does clustered XFS including Windows as client nodes. So weâve got code that actually does XFS data writes from Windows nodes. Of course, the tricky bit is managing all of the metadata/logging, which isnât touched from Windows in that system, but itâs just another tidbit to note âyes, this type of system should be possibleâ.


As far as licensing, Iâm certainly no expert, but AFAIK it should be possible to use the same GPL license as you note and make an open-source Windows driver for this using as much of the current XFS code as is convenient. There are nuances in the license though. I can try to find the article if youâre interested: I read a post previously by someone who had developed a GPL driver on Windows and was noting concerns about linking against closed source libraries (essentially decided it was okay because it (a) could be considered a system library and (b) they were starting a fresh project so they could add extra exemptions specifically allowing that).


I am a novice at XFS and, frankly, at Windows kernel device development as well. But Iâm certainly interested in seeing a GPL XFS-on-Windows developed at some point. If you go ahead with this, Iâd definitely appreciate any information and would be glad to assist in any way I can. And myself personally, Iâd absolutely appreciate someone else taking the lead on this, because with other issues Iâm working on, I would be unlikely to put serious solo effort into this anytime soon.



-Shaun Gosse

CXFS Windows



From: xfs-bounces@xxxxxxxxxxx [mailto:xfs-bounces@xxxxxxxxxxx] On Behalf Of Yuji Saeki
Sent: Sunday, December 08, 2013 5:25 PM
To: xfs@xxxxxxxxxxx
Subject: XFS...Windows?


Congratulations on your file system, itâs quite nice. Iâve benchmarked it myself, itâs very impressive. Iâm curious though, is there are thought to a Windows driver? If someone ported the most current-stable version to Windows (free) under the same license âGNU Lesser General Public Licenseâ with entire credit to XFS, would SGI be okay with that? A âno-warranty impliedâ (etc) kind of protection of course. Quite a few devs that I work with enjoy the XFS filesystem and we dev in both Linux and Windows. Weâre very interested in making this happen with respect to the XFS project.

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