RHCSA Objective: Manage layered storage

[EddieJennings]

As I end my preparations for RHCSA, I'm going back over the objectives list to find weaknesses that need touching up.

I'm familiar with using LVM as a layer of abstraction above "physical" block devices, but there's another objective that touches LVM.  Does anyone know if "Managed layerd storage" is referring to being able to configure / manage Stratis?

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/managing_file_systems/...

[JS_Learning]

Hi,

Yes, "Manage layered storage" is about Stratis.

The rule is if its in the objectives, you are supposed to know it. 

https://www.redhat.com/en/services/training/ex200-red-hat-certified-system-administrator-rhcsa-exam

That does not means it will be asked in your exam though...

It's not a too complicated topic and the commands are fairly easy to use, good luck!

[EddieJennings]

Thanks.  I'll work with it in my lab soon.  I'm not sure about its usefulness since we have LVM and VDO, but yes, since it's an objective, I'll become familiar.

[Matt7]

its a file system manager like ZFS, so you still need to know LVM. Also, stratis is still "beta" if you ask me. While it may be stable, there's a lot you still can't do. Once you use stratis, everything has to be done in stratis, so you can't use LVM to manage it after that. Eventually it will be mature enough to replace LVM though (for storage management, not as a technology).

[priteshthakkar]

I am also prepping for RHCSA 8, found following links useful understanding stratis. 

stratis snapshots **
https://www.golinuxcloud.com/create-stratis-snapshot-file-system-rhel-8/#Create_Stratis_snapshots

install stratis **
https://www.golinuxcloud.com/create-stratis-file-system-example-rhel-8/

All the best.