Date: Mon, 24 Jan 2000 11:48:44 +0000 From: Steve McIntyre <smcintyr@allstor-sw.co.uk> To: mccrobi@aplcenMP.apl.jhu.edu Cc: fs@freebsd.org Subject: Re: UDF, userfs Message-ID: <E12ChzA-0001T9-00@leo.software.plasmon> In-Reply-To: <DB66C4BD26ECD9C08025686E0068DF98.0068DFFB8025686E@plasmon.co.uk>
next in thread | previous in thread | raw e-mail | index | archive | help
you write: > >There are some file systems in the commerical world that "uplink" to >a user mode daemon that does the actual on-disk work. Without naming >names, I can think of at least two that actually do this... > >They present a pseudo-device which the end-user mounts. This >pseudo-device catches all the file system requests and "up calls" the >user mode daemon. The user mode daemon than talks to the real device to >perform the i/o. I may be able to provide details of the process from >another Unix system, but not actual code. > >This approach seems to handle many o/s'es in that the daemon can be made >somewhat portable. The pseudo-device, however, is of necessity o/s >specific. You're spot on with the description above - we have jukebox management software that does exactly this. Our method is portable to AIX, Solaris, FreeBSD and NT right now, Linux and HP-UX support is coming soon. -- Steve McIntyre Allstor Software www.allstor-sw.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-fs" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?E12ChzA-0001T9-00>