Date: Mon, 30 Oct 2000 03:47:34 -0600 (CST) From: Mike Meyer <mwm@mired.org> To: <jay.krell@cornell.edu> Cc: <questions@freebsd.org> Subject: Re: make install multiprocess safe? Message-ID: <14845.17334.72493.643596@guru.mired.org> In-Reply-To: <00c201c04255$b3bfaab0$8001a8c0@jayk3.jaykhome> References: <00c201c04255$b3bfaab0$8001a8c0@jayk3.jaykhome>
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jay.krell@cornell.edu types: > Imho it should be more safe. > Even concurrent builds in the same directory should work better -- one > should notice the other and either wait or abort. Well, once you patch the files in /usr/ports/Mk to do that, use send-pr to submit them. <mike > ..Jay > > -----Original Message----- > From: Mike Meyer <mwm@mired.org> > To: jay.krell@cornell.edu <jay.krell@cornell.edu> > Cc: questions@freebsd.org <questions@freebsd.org> > Date: Sunday, October 29, 2000 11:31 AM > Subject: Re: make install multiprocess safe? > > > >jay.krell@cornell.edu writes: > >> This has been bugging me a while. I've always just avoided it. > >> Is it safe to > >> cd /usr/ports/1/2 > >> make install & > >> cd /usr/ports/3/4 > >> make install > >> ? > > > >Mostly it's safe. > > > >> if both go to like register the package at about the same time, will the > >> package database stay not corrupted? > > > >The "packages database" is a collection of flat text files. You only > >get into problems if you try writing to the same one at the same time. > > > >> I'm assuming both have all their dependents installed or they share no > >> dependents -- to avoid the question of building in the same directory at > the > >> sam etime. > > > >*That's* the real problem: dependencies. If both ports depend on the > >same third package, and they both start writing on the +REQUIRED_BY > >file at the same time, it could mess up that file. On the other hand - > >that's not a major breakage; it just means that you don't get warned > >about all the dependencies when you remove the third package. As > >opposed to what happens when the two makes start trying to build the > >same package, which tends to break that build. > > > >If no package in system is directly required by more than one unbuilt > >package in the tree of dependents, you will be safe. Given that all > >the dependents of the two ports are built, this means that no package > >is directly required by both ports. > > > > <mike > > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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