QuTS hero 6.0 Public Beta - “CACHED Storage and QTier”

QuTS hero h6.0 Beta
1

Thanks for CACHE new feature implementation, Now for manage CACHE content I can choose what data for me are need to cache and what data not need.

Will be nice to implement there also request quantity when data will be cached and cache time, when data will be expired.

Screenshot From 2026-01-07 11-40-32
Screenshot From 2026-01-07 11-40-321187×628 91 KB

QNAP Team can you please explain what happen, when on the same device will be nvme ssd for cache and additional nvme for qtier in same disk pool.

If DATA migrated from cold drive (SAS/SATA HDD) to qtier hot drive(nvme SSD) and than requests come and data will be cached?

How NAS QuTS hero working in this situation, because both cache and qtier is nvme!

How data migrated?

Where is priority request and maybe I can define what data will be in qtier and what data in cache?

Best regards

2

Forum users here generally recommend that cache not be used. It is does not work well and can actually slow things down.

3

QuTS is using native ZFS cache..so that should not be broken.

Still cache has limited use cases l, useful for some cases, useless for others.

Only advantage for Qtier would be the addition of usable space of the extra bays and the option to remove this space again (vs. destruction of all data on normal mixed array pools)

4

Does there is methods, how cache or qtier tested, can you provide test methods or results if they are available?