It's not outdated but it's rarely necessary because:
- the HostedEngine volume must be dedicated for the HE VM. Setting enough space for the bricks is enough - for example physical disk is 100GB, Thinpool is 100GB, thin LV 84GB (16GB should be put aside for the metadata). In such configuration, you can't go out of space.
I/O overhead can be minimized by setting the full stripe size (and the thinpool chunk size) between 1MiB and 2MiB (preferably in the lower end).

One big advantage of the thinpool-based bricks is that you can create snapshots of the volume. Usually I shut down the engine, snapshot the volume and then power up and do the necessary actions (for example Engine upgrade).

Best Regards,
Strahil Nikolov 


On Sun, Sep 18, 2022 at 22:50, Jonas
<jonas@rabe.ch> wrote:


https://access.redhat.com/documentation/en-us/red_hat_hyperconverged_infrastructure_for_virtualization/1.8/html/deploying_red_hat_hyperconverged_infrastructure_for_virtualization/rhhi-requirements#rhhi-req-lv

> The logical volumes that comprise the engine gluster volume must be thick provisioned. This protects the Hosted Engine from out of space conditions, disruptive volume configuration changes, I/O overhead, and migration activity.

Or is that extremely dated information?

Am 18. September 2022 21:08:45 MESZ schrieb Strahil Nikolov via Users <users@ovirt.org>:
>Can you share the RH recommendation to use Thick LV ?
>Best Regards,Strahil Nikolov 
>
>    I don't have that anymore, but I assume that gluster_infra_lv_logicalvols requires a thin pool: https://github.com/gluster/gluster-ansible-infra/blob/master/roles/backend_setup/tasks/thin_volume_create.yml
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