Date: Mon, 30 Oct 2000 03:04:18 -0800 From: jay.krell@cornell.edu To: "Mike Meyer" <mwm@mired.org> Cc: <questions@freebsd.org> Subject: Re: make install multiprocess safe? Message-ID: <005601c04261$278b10a0$8001a8c0@jayk3.jaykhome>
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I'm still a while away from understanding that stuff.. maybe if it was C or C++.. - 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: Monday, October 30, 2000 1:47 AM Subject: Re: make install multiprocess safe? >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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