I'm aware, that for performance reasons, its only recommended to utilize only 50% capacity with regards to an ISCSI extent ... but I can't find a clear answer about where that 50% should be actually be held in reserve. I've searched, but this could be a matter of not searching with the correct terminology to yield useful results.
With an example system consisting of:
(6) 2TB spindle disks, configured as mirrors for a 6TB pool (using round numbers for simplicity).
Do you a) provision the largest possible zvol, and then limit filling it to 50% of its capacity?
Or b) ... in this example, do you simply create a 3TB zvol and let it fill up (leaving the un-provisioned space as the reserve)?
Apologies if this is an asked and answered question.
Thanks
With an example system consisting of:
(6) 2TB spindle disks, configured as mirrors for a 6TB pool (using round numbers for simplicity).
Do you a) provision the largest possible zvol, and then limit filling it to 50% of its capacity?
Or b) ... in this example, do you simply create a 3TB zvol and let it fill up (leaving the un-provisioned space as the reserve)?
Apologies if this is an asked and answered question.
Thanks