They say theres no stupid questions but here we go 
Is there a safe.sensible reasonable way to set up a volume that spans multiple disk chassis using TruNAS? As an example, we have multiple 40/100Gbit connected chassis to our core switching infrastructure but the request has come for investigating a single name space across two chassis.
Is this possible using TruNAS or is it even advisable? Could be a rudimentary question thats easily answered but wanted to get to the bottom of this…client has larger scale performance requirements which TruNAS is already working for but this has expanded rapidly.
I doubt you are a home user.
This is an Enterprise question for a sales team with System Engineers. The answer depends on the details of the problem.
very possibly - but this is a community forum so i was hoping for a nudge in the right direction for a ‘yeah its possible’ or ‘ive done it on 4 old NAS’s’
If it is possible then cool i’ll discuss with the community and then maybe the enterprise sales team if the scope determines
Multiple chassis to a single node then sure but combining multiple nodes then not so much. We are now talking about clustering which ZFS can’t do so you would need to abstract a layer using something like gluster etc which iX was pursuing historically hence the name ‘SCALE’ but this got canned.
My hope is that iX are working on something in the background and that this idea could be seen at some point in the future.
If you are just after a single namespace to make life easier for customers then you could explore using something like Microsoft’s DFS.
What is the main idea? Are you trying to create more fault tolerance, expand capacity or make life easier for customers to consume the storage?
PS: If performance related perhaps you could share your system specs and what limits you are reaching so the community could better advise.
