Date: Wed, 17 Jul 2002 00:23:40 +0200 From: Nicolas Rachinsky <list@rachinsky.de> To: freebsd-stable@FreeBSD.ORG Subject: Re: Poor Mans Software raid 1 on root partition? Message-ID: <20020716222339.GA49575@narr.dauerreden.de> In-Reply-To: <20020716130731.73e01b80.djb@unixan.com> References: <20020715225138.V82789-100000@mail.allcaps.org> <3.0.5.32.20020716083905.0117a758@mail.sage-one.net> <20020716190324.GA1042@skalman.campus.luth.se> <20020716130731.73e01b80.djb@unixan.com>
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* Daniel Brown <djb@unixan.com> [2002-07-16 13:07 -0700]: > Wrote Mattias Pantzare: > > > rsync is probably better than dd. > > Indeed, 'dd' also has the problem of copying a live filesystem whose > metadata may change right under you. It is best to simply partition > your second drive the same way (you can, in fact, pipe the 'disklabel' > output of one drive into the 'disklabel -R -B /dev/stdin' for an > identical drive), add appropriate /etc/fstab entries, then do periodic > software updates. > > However, rsync is a VERY poor choice for backing up an entire > filesystem; as it loads a "worklist" in memory prior to making its > moves, it becomes very memory and CPU intensive. This is both slow > and annoyingly affects response time for services on the machine. > > Try mirrordir (good, has problems with socket nodes, not found in > ports), ssync (ok, but doesn't do devices/etc), pax -rw (ok, but > doesn't delete removed files), or rdiff-backup (nice, but hardlinks > not respected, not found in ports, never tried it on FreeBSD). Or > search for other similar tools -- keep an eye for low resources use, > incremental updates, and few/no problems with "special" filetypes. /usr/ports/sysutils/cpdup To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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