Category Archives: Ceph
Migrating BlueStore’s block.db
Ceph’s BlueStore storage engine is rather new, so the big wave of migrations because of failing block devices is still ahead – on the other hand, non-optimum device selection because of missing experience or “heritage environments” may have left you … Continue reading
Posted in BlueStore, Ceph
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Resetting an existing BlueStore OSD
During an attempt to migrate some OSDs’ BlueStore RocksDB to a different block device, we noticed (previously undetected) fatal read errors on the existing RocksDB. The only way to recover from this situation is to remove the OSD and rebuild … Continue reading
Posted in BlueStore, Ceph
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OpenStack: How to enable live-migration on KVM
For quite some time I had live-migration on my mind but never really had the time to dig into this deep enough to get it working. But a couple of weeks ago this topic came up again, we were planning … Continue reading
Posted in Ceph, OpenStack, Virtualisation
Tagged kvm live-migration libvirt nova, openstack
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