On 2020-09-17 18:36, Mathias Lindberg wrote:
> Hi,
>
> We have a 1.2PB Nautilus installation primarily using CephFS for our
> HPC-resources.
> Our OSD’s have spinning disks and NvME devices for WAL and DB in an
> LVM-setup.
>
> The CephFS metadata pool resides on spinning disks, and I wonder if
>
... unless you use the reclassify tooling:
https://docs.ceph.com/en/latest/rados/operations/crush-map-edits/#migrating-from-a-legacy-ssd-rule-to-device-classes
On Thu, 17 Sep 2020, 19:30 Dan van der Ster, wrote:
> Hi,
>
> AFAIR the device types adds a bunch of shadow devices e.g. osd.1~hdd or
Hi,
AFAIR the device types adds a bunch of shadow devices e.g. osd.1~hdd or
something like that... And those shadow devs have a different crush id than
the original, untyped device.
So, alas, I don't think your test is complete, and yes I expect that your
data would move if you change the rule pr
