Hi, we use OSDs with data on HDD and db/wal on NVMe. But for now, BlueStore.DB and BlueStore.WAL only store medadata NOT data. Right ? So, when we migrated from : A) Filestore + HDD with hardware writecache + journal on SSD to : B) Bluestore + HDD without hardware writecache + DB/WAL on NVMe Performance on ours random-write workloads drops. Since default OSD setup now use LVM, enabling LVM-writecache is easy. But is it a good idea ? Do you try it ? Thanks, Olivier _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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