Logical volume management
reddit / BSD

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gshrikant · 2017-12-14 04:04

Are there are any logical volume management options available for
FreeBSD or OpenBSD? I'm trying to choose between one of them for
personal use and so far it seems my option is to run FreeBSD with ZFS
(which might not make sense for a single-disk machine with 4 gig
memory).

Are there other options I could look into?

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ANDROID_16 · 2017-12-14 05:55

4GB of memory is fine for ZFS as long as you don't enable
deduplication

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ishigami_san · 2017-12-14 06:58

There is [vinum](https://www.freebsd.org/doc/en/articles/vinum/) too,
have used it long time ago, worked fine.

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midgaze · 2017-12-14 08:18

ZFS works just fine with a single disk, and with less memory than you
have. It has a great feature set and is simply a pleasure to use.

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pavetheway91 · 2017-12-14 09:26

I run 512mb VMs on ZFS.

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piglit3 · 2017-12-14 09:59

yeah... netbsd has LVM2 support.

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dkeav · 2017-12-14 19:43

[Geom is what you're looking
for](https://www.freebsd.org/doc/handbook/geom.html) if not wanting to
use ZFS, but works with zfs as well.

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vermaden · 2017-12-16 16:17

What makes You feel that 4 GB is not enough for ZFS?

I have used 4 TB of data on ZFS pool for years with 512 MB RAM, with
enabled compression (lzjb by then, currently would have used lz4).

Also thinking that 'I would not use ZFS because I only have one disk'
is wrong.

Its wrong because ZFS does not only provide scalability over massive
number of disks. It provides DATA INTEGRITY and online compression,
even for single disk in laptop, VM or simple server.

You can not have DATA INTEGRITY and/or online compression with UFS.

Its nothing wrong to use ZFS everywhere, although You will hear a lot
of FUD steering you in the opposite direction (to not use it on single
disk).

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3G6A5W338E · 2017-12-16 23:22

>It provides DATA INTEGRITY

So do LUKS2 and HAMMER2.

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vermaden · 2018-01-03 14:40

LUKS2 and HAMMER2 are not available on FreeBSD.

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3G6A5W338E · 2018-01-03 14:49

That's unfortunate. You have the option of using Linux or Dragonfly
respectively. Or just FreeBSD and ZFS as you've apparently been doing.

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cweimann · 2018-01-10 16:24

I must not understand what logical volume management because I really
don't see how Geom provides it.