What happens when a DB/WAL device runs out of space?

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Hello

I have a bunch of HDD OSDs with DB/WAL devices on SSD. If the current trends continue, the DB/WAL devices will become full before the HDDs completely fill up (e.g. a 50% full HDD has DB/WAL device that is about 65% full).

Will anything terrible happen when DB/WAL devices fill up? Will RocksDB just put whatever doesn't fit in DB/WAL SSD on the HDD?


Thanks

Vlad
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