Date: Tue, 13 Feb 2007 12:15:19 -0600 From: Eric Anderson <anderson@freebsd.org> To: Ivan Voras <ivoras@fer.hr> Cc: freebsd-fs@freebsd.org Subject: Re: UFS2 with SAN Message-ID: <45D20037.1040102@freebsd.org> In-Reply-To: <eqsut3$6a3$1@sea.gmane.org> References: <45CD6FF5.8070007@freebsd.org> <20070213075627.63126.qmail@web34502.mail.mud.yahoo.com> <6FC9F9894A9F8C49A722CF9F2132FC2204C9DAB4@ms05.mailstreet2003.net> <a969fbd10702130839j727d055bu10c3ec80e38d2a3d@mail.gmail.com> <6FC9F9894A9F8C49A722CF9F2132FC2204C9DAB5@ms05.mailstreet2003.net> <6FC9F9894A9F8C49A722CF9F2132FC2204C9DAB6@ms05.mailstreet2003.net> <45D1F30A.6080403@freebsd.org> <eqsut3$6a3$1@sea.gmane.org>
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On 02/13/07 12:09, Ivan Voras wrote: > Eric Anderson wrote: > >> You might look at tdfs (fuse module from Ivan Voras I believe). It's >> probably horribly beta (not knocking it Ivan - I'm sure it's an amazing >> start), so lots of testing would need to be done. It's also most likely >> not high performance. > > Yes, I'm realistic about it - it is "horribly beta" :) > > Two reasons: one: I couldn't amass enough interested parties to help > test it (and possibly work on it), and second: while it's a nice problem > to tackle, I don't [yet] need it that badly to start working on it > outside of free time). In any case, TDFS doesn't have locking because > FUSE doesn't have it (or didn't when I started doing it), so it stays > single-writer-multiple-readers until that changes. > > I'm thinking of re-creating it in kernel mode (and in this form it could > also have locking) but not any time soon. Maybe during the summer (SoC? > probably.). > I've thought about this too - and even thought about making it a file system layer, like nullfs, with a network-kernel piece to notify the readers of changes, etc. I'm not certain if it would work or not.. Eric
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