Hi all, while reading a sibling thread about moving DB/WAL to a separate device, I wonder whether is it possible to go the other way round as well, i.e. to remove a metadata device from an OSD and merge metadata back to the main storage? What I am trying to do: My OSD nodes are 1U boxes with 4 drive bays, two of which support NVMe. They have two small-ish NVMe drives and two large HDDs. On NVMe, there is a partition for an OS (configured as RAID-1 across both NVMe drives), and the rest of each NVMe is used as metadata for one of the HDD-based OSDs. So I have two OSDs per node. Now I am considering replacing those small NVMes with much larger ones, and use part of them for an OS as before, part of them as metadata for the HDD-based OSDs as before, and the rest as new NVMe-only OSDs. Can this be done without tearing the original HDD+NVMe-based OSDs down and recreating them again? Being able to remove a metadata device from the OSD would help in this case. Thanks! -Yenya -- | Jan "Yenya" Kasprzak <kas at {fi.muni.cz - work | yenya.net - private}> | | https://www.fi.muni.cz/~kas/ GPG: 4096R/A45477D5 | We all agree on the necessity of compromise. We just can't agree on when it's necessary to compromise. --Larry Wall