Currently I am checking usage on ssd drives with ceph osd df| egrep 'CLASS|ssd' I have a use % between 48% and 57%, and assume that with a node failure 1/3 (only using 3x repl.) of this 57% needs to be able to migrate and added to a different node. Is there a better way of checking this (on old Nautilus)?
On Fri, Jul 28, 2023 at 07:13:33PM +0000, Marc wrote:
I have a use % between 48% and 57%, and assume that with a node failure 1/3 (only using 3x repl.) of this 57% needs to be able to migrate and added to a different node.
If you by this mean you have 3 nodes with 3x replica and failure domain set to host, it's my understanding no data will be migrated/backfilled when a node fails. The reason is that there is nowhere to copy the data to, to fulfill the crush rule one copy on 3 different hosts. -- Kai Stian Olstad
participants (2)
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Kai Stian Olstad
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Marc