Date: Tue, 5 Mar 2002 10:36:06 -0500 From: Brian T.Schellenberger <bts@babbleon.org> To: Burhan Nazir <burhan@blueyonder.co.uk>, Brett Glass <brett@lariat.org> Cc: questions@FreeBSD.ORG Subject: Re: Softupdates on root in 4.5-RELEASE Message-ID: <20020305153606.E096FBA03@i8k.babbleon.org> In-Reply-To: <20020305152447.GA25206@swansea.cableinet.net> References: <200203051451.HAA04559@lariat.org> <20020305152447.GA25206@swansea.cableinet.net>
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On Tuesday 05 March 2002 10:24 am, Burhan Nazir wrote: > Softupdates will not write any data immediatly to the disk. I believe > it is about 30 seconds b4 any data actually gets wriiten. This enhances > disk write speed for certain types of operations. However, there is a > small risk of data loss/coruption if the machine looses power b4 any data > was written. For that reason, ppl believe that it is not a good idea to > have softupdates on the system critical root partition I think it's more a matter of avoiding it on partitions that are likely to be rather full and fairly small, since the delay in processing deletes means that you effectively lose a certain amount of disk space due to processing time. Thus, if you rm /bit/honking/directory/* operation-that-write-to-disk you can easily run out of disk space as the second operation starts writing long before the first operation actually returns space to the system. I personally make the root partition larger and enable soft-updates but disable write-caching. This seems much safer than the system default way of doing things to me, but with nearly equal performance. > > Brett Glass wrote: > >Just noticed that the default, in 4.5-RELEASE, is to install > >softupdates on all partitions EXCEPT root. Is this an oversight, > >or is there a reason why this is the default setting? > > > >--Brett Glass > > > >To Unsubscribe: send mail to majordomo@FreeBSD.org > >with "unsubscribe freebsd-questions" in the body of the message > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message -- Brian T. Schellenberger . . . . . . . bts@wnt.sas.com (work) Brian, the man from Babble-On . . . . bts@babbleon.org (personal) ME --> http://www.babbleon.org http://www.eff.org <-- GOOD GUYS --> http://www.programming-freedom.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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