Hi,
There is no need to rebuild all ODS. You can follow the procedure
described by RedHat[0] to convert the DB and tell the OSD to use
rocksdb.
Couldn't find this documented elsewhere. You may need a RedHat account
to access the content, but you could create a developer one for free
IIRC.
[0]
https://access.redhat.com/solutions/3210951
---
Alex Cucu
On Wed, Jan 22, 2020 at 5:30 PM Robert LeBlanc <robert(a)leblancnet.us> wrote:
>
> In the last release of Jewel [0] it mentions that omap data can be stored in rocksdb
instead of leveldb. We are seeing high latencies from compaction of leveldb on our Jewel
cluster (can't upgrade at this time). I installed the latest version, but apparently
that is not enough to do the conversion. Is there a way to move OSDs from leveldb to
rocksdb without trashing and rebuilding all the osds?
>
> [0]
https://docs.ceph.com/docs/master/releases/jewel/
>
> Thanks,
> Robert LeBlanc
> ----------------
> Robert LeBlanc
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