Hello, I was wondering if it's possible or how best to add a DB & WAL to an OSD retroactively? (Still using Luminous)
I hurriedly created some HDD-backed bluestore OSDs without their WAL & DB on SSDs, and then loaded them up with data. When I realized I forgot to use the SSD partitions for its WAL & DB, I marked the first OSD out, let it drain, nuked it, and recreated it, and am now waiting for it to re-populate. In the meantime, I've been searching for how to best add them retroactively on the remaining OSDs. I found https://swamireddy.wordpress.com/2016/02/19/ceph-how-to-add-the-ssd-journal/ which seems to describe how to add the DB, but not the WAL. Any tips? Thanks! - Brad
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