@christian.naenny Why would you do SOBR at all? You can use SOBR at a later time, converting from the non-SOBR.
Just throw the 12 volumes in a striped (or if you don't trust it spanned) LVM when it comes from one storage.
What benefit would a SOBR have for you? The only thing i can thin of would be:
- limit the risk if some corruption occours -> but if something is corrupted it is likely it is not limited to one volume (for example if the storage has a firmware bug).
- make moving the volume easier -> this is where LVM shines. With pvmove (https://linux.die.net/man/8/pvmove) you can move the stipes to a new storage device and then extend the volume via LVM.
In the past there were some limitations (moving worked only if you move all the volumes belonging to one stripe set, you had to add exactly the amount of volumes you have in one stripe set) but in the latest kernels we found most of these limits are gone.
We started small: for example stripe only 2 or 4 volumes (so that both controllers of the 1090 have something to do) - "lvcreate -i 4 -I 128k". Put some test data on the XFS. Try pvmove while test backups are running. Extend the volumes via vgextend/lvextend.
Get to know how LVM works. Its really, really good and easy once you get the basics of it.
If you need more infos just let me know and i will go into more detail![:-)]( "Smile")
Just throw the 12 volumes in a striped (or if you don't trust it spanned) LVM when it comes from one storage.
What benefit would a SOBR have for you? The only thing i can thin of would be:
- limit the risk if some corruption occours -> but if something is corrupted it is likely it is not limited to one volume (for example if the storage has a firmware bug).
- make moving the volume easier -> this is where LVM shines. With pvmove (https://linux.die.net/man/8/pvmove) you can move the stipes to a new storage device and then extend the volume via LVM.
In the past there were some limitations (moving worked only if you move all the volumes belonging to one stripe set, you had to add exactly the amount of volumes you have in one stripe set) but in the latest kernels we found most of these limits are gone.
We started small: for example stripe only 2 or 4 volumes (so that both controllers of the 1090 have something to do) - "lvcreate -i 4 -I 128k". Put some test data on the XFS. Try pvmove while test backups are running. Extend the volumes via vgextend/lvextend.
Get to know how LVM works. Its really, really good and easy once you get the basics of it.
If you need more infos just let me know and i will go into more detail
Statistics: Posted by mkretzer — Apr 14, 2025 9:50 am
