Date: Wed, 20 Feb 2019 23:08:57 -0800 From: "Jack L." <xxjack12xx@gmail.com> To: Polytropon <freebsd@edvax.de> Cc: "@lbutlr" <kremels@kreme.com>, "freebsd-questions@freebsd.org" <freebsd-questions@freebsd.org> Subject: Re: Duplicating file system Message-ID: <CALeGphzvXyC698XqHO0owP43gad5tnjRsQTQU0-xLYi-%2BVNeBg@mail.gmail.com> In-Reply-To: <20190221075515.c815b269.freebsd@edvax.de> References: <0A33E3BE-96C9-4D83-B9F7-D4D2792B5161@kreme.com> <32153EA7-4BC5-4EE2-98FA-5BDEE1903BA3@cretaforce.gr> <4CAB4BC4-0473-41CF-AF03-D1CE796F5545@cretaforce.gr> <0F4BBC09-3F9D-4740-A8E4-BB3B87F2A657@kreme.com> <20190221032121.c0006dfe.freebsd@edvax.de> <C8D2F401-AC47-4089-AD34-A2E7E8E033C0@kreme.com> <20190221075515.c815b269.freebsd@edvax.de>
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I missed the original thread but if I want to duplicate my filesystem, i usually use the dump and restore method cd targetdir;dump -0f - /dev/device|restore -rf - that will dump the /dev/device to stdout and then restore stdout to the target. Very quick. On Wed, Feb 20, 2019 at 11:00 PM Polytropon <freebsd@edvax.de> wrote: > > On Wed, 20 Feb 2019 20:59:21 -0700, @lbutlr wrote: > > On 20 Feb 2019, at 19:21, Polytropon <freebsd@edvax.de> wrote: > > > With this in mind, I'd start with an 1:1 copy using dd, and from that > > > point on, have a scheduled job of rsync or cpdup in place to have any > > > source changes affect the "copy drive". > > > > I will try cpdup as I have tried rsync already and it is too > > resource intensive to run it constantly. Even with a 5 minute > > delay sometimes a task will not finish before the next one > > starts and then a cascade will bring the system down as more > > and more processes get stuck. > > This makes the scenario even more look like a situation where > a mirrored approach (like software RAID, gmirror) is a good > solution; writes will happen in quasi-parallel and transparent > to the writing process, so those race conditions won't appear. > > But definitely try cpdup, it might work fast enough to fit > the time window. :-) > > > > -- > Polytropon > Magdeburg, Germany > Happy FreeBSD user since 4.0 > Andra moi ennepe, Mousa, ... > _______________________________________________ > freebsd-questions@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to "freebsd-questions-unsubscribe@freebsd.org"
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