Hey all! Looking to clarify something. This message is really for @jgreco but anyone with knowledge of the topic might be able to help ....
Here is the background of my setup ...
STORAGE POOL
8 x 3TB Mirrors - Total 24TB of Storage
Defined a 12TB ZVOL (which is 50% of total space)
* Noticed it warns not to use more than 80% of available space for ZVOL.
Created iSCSI Extent for VMWARE using a ZVOL device.
Target Golbal Configuration
Pool Available Space Threshold - 50%
Extent Confgiuration (were i configure Extent type to device, etc ...)
Available Space Threshold - 50%
Basically, what I'm trying to figure out with respect o best practice ... I know as a rule of thumb you should stay under 50% usage ... What I'm trying to understand is ... Is this a "storage pool" suggestion, or a "ZVOL" suggestion? Basically, what I'm getting at here ... I've only allocated 50% of the pool for a ZVOL, and then i've got these alerts set for 50%. Which gives me the sense that I really only can use 6TB of my 24TB of storage. Seems that I'm looking at this wrong ...
Basically, should I allocate that ZVOL to 80% or so of my usable pool storage. Maybe raise it up to 19.2TB vs the 12TB it is at now. Expand my ZVOL to 19.2TB, and then keep the the iSCSI usage to under 10TB? Or am I really to believe that your best practice ends up being only 25% of usable storage? Just trying to make sure I figure this out before I get "too far down the rabbit hole".
Just to be clear, the FREENAS is only an ISCSI mount for ESXi. There are no additional datasets on there for CIFS/NFS mounts ...
Your valued advice would be greatly appreciated!
Here is the background of my setup ...
STORAGE POOL
8 x 3TB Mirrors - Total 24TB of Storage
Defined a 12TB ZVOL (which is 50% of total space)
* Noticed it warns not to use more than 80% of available space for ZVOL.
Created iSCSI Extent for VMWARE using a ZVOL device.
Target Golbal Configuration
Pool Available Space Threshold - 50%
Extent Confgiuration (were i configure Extent type to device, etc ...)
Available Space Threshold - 50%
Basically, what I'm trying to figure out with respect o best practice ... I know as a rule of thumb you should stay under 50% usage ... What I'm trying to understand is ... Is this a "storage pool" suggestion, or a "ZVOL" suggestion? Basically, what I'm getting at here ... I've only allocated 50% of the pool for a ZVOL, and then i've got these alerts set for 50%. Which gives me the sense that I really only can use 6TB of my 24TB of storage. Seems that I'm looking at this wrong ...
Basically, should I allocate that ZVOL to 80% or so of my usable pool storage. Maybe raise it up to 19.2TB vs the 12TB it is at now. Expand my ZVOL to 19.2TB, and then keep the the iSCSI usage to under 10TB? Or am I really to believe that your best practice ends up being only 25% of usable storage? Just trying to make sure I figure this out before I get "too far down the rabbit hole".
Just to be clear, the FREENAS is only an ISCSI mount for ESXi. There are no additional datasets on there for CIFS/NFS mounts ...
Your valued advice would be greatly appreciated!