Altough Anthony I agree in discouraging this idea, I did the same on my cluster (in production). It's a residue when I installed the cluster not yet knowing how large my setup would be.
A typical setup on each host: Device Boot Start End Sectors Size Id Type /dev/sde1 2048 209717247 209715200 100G 83 Linux /dev/sde2 209717248 1875385007 1665667760 794,3G 8e Linux LVM Device Boot Start End Sectors Size Id Type /dev/sdf1 * 2048 1050623 1048576 512M ef EFI (FAT-12/16/32) /dev/sdf2 1050624 210765823 209715200 100G 83 Linux /dev/sdf3 210765824 1875385007 1664619184 793,8G 83 Linux md0 : active raid1 sdf2[3] sde1[2] Disks sd[a-d] and beyound sdf are used exclusively for osd Never had an issue with the functioning of ceph in this setup (for approx.. 3 years this cluster is running). So even being not good practice, I don't intended to take the time to modify this setup > -----Oorspronkelijk bericht----- > Van: Anthony D'Atri <anthony.da...@gmail.com> > Verzonden: vrijdag 13 juni 2025 18:06 > Aan: filip Mutterer <fi...@3dds.io> > CC: ceph-users@ceph.io > Onderwerp: [ceph-users] Re: partitioning OSD Storage drive > > Yes, you can deploy an OSD on a partition or LVM. > > What you propose is generally discouraged for multiple reasons. Is this is a > sandbox cluster? > > How large would these partitions be? OSDs smaller than … say 256-500GB > can behave unexpectedly. > > > On Jun 13, 2025, at 10:54 AM, filip Mutterer <fi...@3dds.io> wrote: > > > > Is it possible to partition an OSD storage drive? As I only have 2 S-ATA > > ports it > sounds like a better choice to use a small part of the two SSDs for the > operating > system and leave the rest to Ceph. Can I do this? > > > > I already have a setup like this with ZFS and it can have significant > > downsides. > but we can live with slow and save data due to this combination. > > _______________________________________________ > > ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an > > email to ceph-users-le...@ceph.io > _______________________________________________ > ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to > ceph-users-le...@ceph.io _______________________________________________ ceph-users mailing list -- ceph-users@ceph.io To unsubscribe send an email to ceph-users-le...@ceph.io
