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[Discuss] Backing up the entire filesystem
- Subject: [Discuss] Backing up the entire filesystem
- From: dsr at randomstring.org (Dan Ritter)
- Date: Fri, 26 Oct 2018 14:22:11 -0400
- In-reply-to: <CAMdng5tP=knkFBorcJ-TG=X6HrbOQwSt7-8gpeeStJwgsWz-+Q@mail.gmail.com>
- References: <mailman.28045.1540501046.11171.discuss@blu.org> <0CB5EB94-B14A-48CA-8845-10AAE2B03026@pioneer.ci.net> <5bd334f5.1c69fb81.f7ad.3f63@mx.google.com> <9e906143-b479-1066-7d6a-69154d9d8a62@gmx.com> <CAMdng5uww5A+utnOwV+VOV_VANMVG40Umf+qvhxSCjsxPjdokg@mail.gmail.com> <CAMdng5uHyoo1epVvMZx8AB+aW0ef3v1wVYWjUGKxK5kx1UQ4zQ@mail.gmail.com> <edb206c4-8276-2757-22ea-e14b6a54311e@gmx.com> <CAMdng5tP=knkFBorcJ-TG=X6HrbOQwSt7-8gpeeStJwgsWz-+Q@mail.gmail.com>
On Fri, Oct 26, 2018 at 02:18:12PM -0400, Shirley M?rquez D?lcey wrote: > My NAS boxes each have 16GB. One has two 4TB and two 3TB drives in > mirrored pairs; the other has three 1.5TB drives in a RAIDZ1 setup. > And that's just for being a NAS. I would probably need more RAM, > especially on the one with four drives, if I were also running > applications on them. > > Why two smaller boxes rather than one big one? Mostly because I > already own a pair of low end AMD systems using mini-ITX motherboards > and AM1 socket CPUs that I originally got for another purpose but was > no longer using, and I already had all the drives. Those motherboards > only have two DDR3 memory sockets and thus have a RAM ceiling of 16GB, > and the cases will only hold four hard drives. > On Fri, Oct 26, 2018 at 2:04 PM Marco Milano <marco.milano at gmx.com> wrote: > > > > > > > > On 10/26/18 1:55 PM, Shirley M?rquez D?lcey wrote: > > > Another thing to keep in mind is that ZFS does have one flaw; it's a > > > memory hog. If you have a large ZFS filesystem you will need a LOT of > > > RAM to get acceptable performance. But it does represent the current > > > state of the art for file system data integrity. > > > > I think as long as you don't use dedup, it works perfectly fine > > on a system with 8GB or 16GB RAM. The rule of thumb is 1GB per TB of used space, so for Shirley's NAS boxes, dedup would actually work. I don't recommend it, though. -dsr-
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- From: richb at pioneer.ci.net (Rich Braun)
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- From: richard.pieri at gmail.com (Rich Pieri)
- [Discuss] Backing up the entire filesystem
- From: marco.milano at gmx.com (Marco Milano)
- [Discuss] Backing up the entire filesystem
- From: mark at buttery.org (Shirley Márquez Dúlcey)
- [Discuss] Backing up the entire filesystem
- From: mark at buttery.org (Shirley Márquez Dúlcey)
- [Discuss] Backing up the entire filesystem
- From: marco.milano at gmx.com (Marco Milano)
- [Discuss] Backing up the entire filesystem
- From: mark at buttery.org (Shirley Márquez Dúlcey)
- [Discuss] Backing up the entire filesystem
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