You can read this: for starting.What is the main difference of UFS and ZFS. I couldnt find it on handbook
As always, vermaden has your back: https://vermaden.wordpress.com/2021/04/02/ufs-boot-environments/The only downside (for me) is lack of BEs
Problem, UFS bootloader can only load on the same disk ... Which is a serious limitation of the UFS bootpartition.As always, vermaden has your back: https://vermaden.wordpress.com/2021/04/02/ufs-boot-environments/
zfs allows you to do something like this (actual log on my desktop):With UFS, you'd have to plan your partition size and location at install time, and you're generally stuck with that (unless you plan to re-install from scratch).
With ZFS, you have datasets instead of partitions. You can adjust min/max size any time after install, and location/offset limtations/presets are just not there.
cd /root
truncate -s 3G poolfile
zpool create newpool /root/poolfile
zpool status newpool
pool: newpool
state: ONLINE
config:
NAME STATE READ WRITE CKSUM
newpool ONLINE 0 0 0
/root/poolfile ONLINE 0 0 0
zfs create newpool/my_dataset
df -H newpool
Filesystem Size Used Avail Capacity Mounted on
newpool 2.8G 98k 2.8G 0% /newpool
zfs list|grep new
newpool 504K 2.62G 96K /newpool
newpool/my_dataset 96K 2.62G 96K /newpool/my_dataset
truncate -s 3G pool_mirror
zpool attach newpool /root/poolfile /root/pool_mirror
zpool status newpool
pool: newpool
state: ONLINE
scan: resilvered 780K in 00:00:00 with 0 errors on Fri Apr 30 22:21:24 2021
config:
NAME STATE READ WRITE CKSUM
newpool ONLINE 0 0 0
mirror-0 ONLINE 0 0 0
/root/poolfile ONLINE 0 0 0
/root/pool_mirror ONLINE 0 0 0
errors: No known data errors
zpool destroy newpool
ls -ltr pool*
-rw-r--r-- 1 root wheel 3221225472 Apr 30 22:24 poolfile
-rw-r--r-- 1 root wheel 3221225472 Apr 30 22:24 pool_mirror
rm pool*
Actually, you can have ZFS on almost anything, but kitchen sink. Works fine on files and this is good for VM-s. In fact I have bootable VM-s based on files having ZFS on these files.This looks a bit like a loop device.
Argentum: Isn't this a bit of an overkill of an answer? I'd suggest hiding this in a spoiler. I think it would make the forums a bit more readable.zfs allows you to do something like this (actual log on my desktop):
Code:cd /root truncate -s 3G poolfile zpool create newpool /root/poolfile zpool status newpool pool: newpool state: ONLINE config: NAME STATE READ WRITE CKSUM newpool ONLINE 0 0 0 /root/poolfile ONLINE 0 0 0 zfs create newpool/my_dataset df -H newpool Filesystem Size Used Avail Capacity Mounted on newpool 2.8G 98k 2.8G 0% /newpool zfs list|grep new newpool 504K 2.62G 96K /newpool newpool/my_dataset 96K 2.62G 96K /newpool/my_dataset truncate -s 3G pool_mirror zpool attach newpool /root/poolfile /root/pool_mirror zpool status newpool pool: newpool state: ONLINE scan: resilvered 780K in 00:00:00 with 0 errors on Fri Apr 30 22:21:24 2021 config: NAME STATE READ WRITE CKSUM newpool ONLINE 0 0 0 mirror-0 ONLINE 0 0 0 /root/poolfile ONLINE 0 0 0 /root/pool_mirror ONLINE 0 0 0 errors: No known data errors zpool destroy newpool ls -ltr pool* -rw-r--r-- 1 root wheel 3221225472 Apr 30 22:24 poolfile -rw-r--r-- 1 root wheel 3221225472 Apr 30 22:24 pool_mirror rm pool*
etc...
The truth is somewhere between these lines...Argentum: Isn't this a bit of an overkill of an answer? I'd suggest hiding this in a spoiler. I think it would make the forums a bit more readable.
… ZFS ARC <-> vm page integration is planned for FreeBSD 14. …
What is the main difference of UFS and ZFS. …
… ZFS' use of kernel memory as a cache results in higher kernel memory allocation as compared to UFS and VxFS filesystems. Monitoring a system with tools such as vmstat would report less free memory with ZFS and may lead to unnecessary support calls.
<https://old.reddit.com/comments/pvsu2w/-/hecksww/?context=1> re:
vfs.zfs.arc.sys_free
vfs.zfs.arc_free_target
What is the main difference of UFS and ZFS. I couldnt find it on handbook
Journaling vs. Soft Updates, a Usenix 2000 paper …
I do not have anything against UFS as I stated here - it still has its uses - https://is.gd/bsdstg - but You have to be REALLY low on memory to not use ZFS
For example I have run 2 x 2TB ZFS mirror with 512 MB RAM along with running other services for years and it was stable as rock.
People forget that ZFS without RAM is just as fast as the storage devices below it - with RAM its just faster thanks to ZFS ARC cache.
… file systems: Many of then have an identifiable "central father figure" (say Ted Ts'o, Kirk McKusick, Chris Mason, Sage Weil, ...),
… they also have a deep bench of people who understand the "why" and the design. This makes their development process scalable.
… All eyes are at ZFS, which is a cop-out. …