[kwlug-disc] Old Man Yells at ZFS (was: Docker Host Appliance)

[John Sellens]

In these days where many machines are VMs, if space is running out,
you can allocate another disk, attach it to the VM, trigger a (re-)scan
for new devices, and if you're using LVM, you can pvcreate, vgextend,
lvextend, and xfs_growfs on a running virtual machine with no disruption.

If you're talking physical hardware, some might argue that LVM makes it
easy to leave some amount of space unused - especially if you have
multiple partitions - and then add space where needed.

To me - those are big advantages of LVM.

(I was telling students on Tuesday why we have both /bin and /usr/bin,
/tmp and /var/tmp, and /sbin and /usr/sbin - ah the good old days of
small disks, and less reliable filesystems.)

Hope that's helpful!

John


On Wed, 2023/01/18 05:16:58PM -0500, William Park via kwlug-disc <kwlug-disc at kwlug.org> wrote:
| What's the reason for partitioning in the first place?  I understand /etc
| and /boot.  But, for data, why not allocate the whole thing?
| 
| On 2023-01-17 21:30, CrankyOldBugger wrote:
| > I agree with much of what you said, Khalid, but I'm bananas for LVM..
| > What a wonderful thing that LVM is.  Especially at work, when I'm
| > constantly bombarded with DBAs and Devs whining that they're out of disk
| > space...  LVM saves the day again and again.
| 
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