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
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