Hi,
we have OSD nodes currently consisting of two 605GB SSDs and six 18TB
HDDs. The hosts have room for twelve HDDs.
We created a drivegroup spec that looks like this:
spec:
block_db_size: 100GB
data_devices:
rotational: true
size: '18TB:'
db_devices:
rotational: false
size: '550GB:650GB'
db_slots: 6
Initially this creates 6 OSDs with their RocksDB+WAL on the SSDs,
3 each which is nice for load balancing.
But when we add another HDD it gets a 17.9TB data volume and a 100GB DB
volume, both on the HDD:
sdm
8:192 0 18T 0 disk
├─ceph--846e1a59--aff6--4ef8--9b71--de7241531677-osd--block--026e8cef--123d--47d9--9b30--211f94edf96c
252:16 0 17.9T 0 lvm
└─ceph--846e1a59--aff6--4ef8--9b71--de7241531677-osd--db--88c47d0b--f5c6--4cec--8909--c5f8036ca459
252:17 0 100G 0 lvm
I would have assumed that the remaining 305GB on the SSDs would be used.
How do we achieve this?
Regards
--
Robert Sander
Heinlein Consulting GmbH
Schwedter Str. 8/9b, 10119 Berlin
http://www.heinlein-support.de
Tel: 030 / 405051-43
Fax: 030 / 405051-19
Zwangsangaben lt. §35a GmbHG:
HRB 220009 B / Amtsgericht Berlin-Charlottenburg,
Geschäftsführer: Peer Heinlein -- Sitz: Berlin
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