The problem with RAIDZ

[Jamberry]

Jamberry submitted a new resource:

The problem with RAIDZ - or why you probably won't get the storage efficiency you think you will get.

Work in progress, probably contains errors!
Not sure if this is the right place to post this, but discussion in the forum seemed to stop.
Hope it is ok to post it here and start a discussion.

As a ZFS rookie, I struggled a fair bit to find out what settings I should use for my Proxmox hypervisor. Hopefully, this could help other ZFS rookies. This text focuses on Proxmox, but it generally applies to all ZFS block storage.

TLDR​

RAIDZ is only great for sequential reads...

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