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Updated Debian Jessie Root on ZFS (markdown)

George Melikov 2017-03-09 21:16:48 +04:00
parent aa1a53e5d8
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13
Debian-Jessie-Root-on-ZFS.md

@ -5,9 +5,8 @@
* This instruction uses GRUB from the `testing` repository for now!
### System Requirements
* [64-bit Debian GNU/Linux Jessie Live CD](http://cdimage.debian.org/debian-cd/current-live/amd64/iso-hybrid/debian-live-8.6.0-amd64-standard.iso)
* 64-bit computer (amd64, a.k.a. x86_64) computer
* A drive which presents 512B logical sectors. Installing on a drive which presents 4KiB logical sectors (a “4Kn” drive) should work with UEFI partitioning, but this has not been tested.
* [64-bit Debian GNU/Linux Jessie Live CD](http://cdimage.debian.org/debian-cd/current-live/amd64/iso-hybrid/)
* 64-bit computer (amd64, a.k.a. x86_64) computer preferred
Computers that have less than 2 GiB of memory run ZFS slowly. 4 GiB of memory is recommended for normal performance in basic workloads. If you wish to use deduplication, you will need [massive amounts of RAM](http://wiki.freebsd.org/ZFSTuningGuide#Deduplication). Enabling deduplication is a permanent change that cannot be easily reverted.
@ -90,7 +89,7 @@ Always use the long `/dev/disk/by-id/*` aliases with ZFS. Using the `/dev/sd*`
On Solaris systems, the root filesystem is cloned and the suffix is incremented for major system changes through `pkg image-update` or `beadm`. Similar functionality for APT is possible but currently unimplemented. Even without such a tool, it can still be used for manually created clones.
3.2 Create a filesystem dataset for the root filesystem of the Ubuntu system:
3.2 Create a filesystem dataset for the root filesystem of the Debian system:
# zfs create -o canmount=noauto -o mountpoint=/ rpool/ROOT/debian
# zfs mount rpool/ROOT/debian
@ -289,7 +288,7 @@ If you are creating a mirror, repeat the grub-install command for each disk in t
5.5b For UEFI booting, install GRUB:
# grub-install --target=x86_64-efi --efi-directory=/boot/efi \
--bootloader-id=ubuntu --recheck --no-floppy
--bootloader-id=debian --recheck --no-floppy
5.6 Verify that the ZFS module is installed:
@ -299,7 +298,7 @@ If you are creating a mirror, repeat the grub-install command for each disk in t
6.1 Snapshot the initial installation:
# zfs snapshot rpool/ROOT/ubuntu@install
# zfs snapshot rpool/ROOT/debian@install
In the future, you will likely want to take snapshots before each upgrade, and remove old snapshots (including this one) at some point to save space.
@ -391,7 +390,7 @@ As `/var/log` is already compressed by ZFS, logrotate’s compression is going t
9.2 Optional: Delete the snapshot of the initial installation:
$ sudo zfs destroy rpool/ROOT/ubuntu@install
$ sudo zfs destroy rpool/ROOT/debian@install
9.3 Optional: Disable the root password