Description of problem: ----------------------- VDO volumes comprises of slabs, with default slabsize of 2G. Also there is known limitation of 8096 number of slabs available per VDO volume. So 8096 x 2G = 16TB. In case the physical storage space exceeds 16TB, VDO volume creation fails. So, in this case, the slab size should be increased to a value greater than 2G, and that will decrease the number of slabs. Version-Release number of selected component (if applicable): -------------------------------------------------------------- cockpit-ovirt-dashboard-0.11.11 How reproducible: ----------------- Always Steps to Reproduce: ------------------- 1. Start installation of RHHI 1.1, using 'Hosted Engine with Gluster' option 2. Have a disk with more than 16TB, for the creation of bricks 3. Enable dedupe & compression on that device Actual results: ---------------- VDO volume creation fails with error 'Exceeds maximum number of slabs supported' when the device more than 16TB physical storage space is provided Expected results: ----------------- VDO volume creation should be successful even when the device with more than 16TB is used for bricks In other case, cockpit-ovirt gluster plugin should have that intelligence to increase the slab size in that case when the physical storage space of the device is more than 16TB Additional info: ---------------- I don't have much information about the effect of increasing the slabsize, it needs to be discussed with SME
Moving this as we need to query disk size info to get the physical size to populate this
Laura, Yes, it's correct.
This is already fixed with cockpit-ovirt logic, where when the size of the brick is more than 1 TB, then the slab size becomes 32G, else, the slab size is taken as 2GB Tested with cockpit-ovirt-dashboard-0.12.2