If your LV is still healthy and you have the space, you could also
just attach a new drive and then pvmove the existing db LVs to the new
drive. That's how we handle our rocksDB SSDs as long as they're still
intact. I'm not entirely sure if you can migrate from one external db
to another, it could work. If I have the time, I'll give it a try. But
if not, you can still migrate the DB back to the data device, replace
the drive, recreate LVs and migrate the DB out again.
Zitat von Alan Murrell <Alan@xxxxxxxx>:
One last question/clarification: when it becomes necessary to
replace that SSD, I assume the process of moving the DB/WAL to the
new SSD is the same, except in the 'ceph-volume migrate' command I
would specify '--from db' now, yes?
Sent from my mobile device. Please excuse brevity and ttpos.
On Feb 4, 2025 00:18, Eugen Block <eblock@xxxxxx> wrote:
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I'm glad it worked. I thought those steps had already been added to
the docs (cephadm specific), but I couldn't find them either. I'll
ping Zac about it.
Zitat von Alan Murrell <Alan@xxxxxxxx>:
OK, I think I am good now. I have completed the rest of the steps
(exit shell, start the osd.10 daemon back up again, waited for it to
be marked as "Up") and then I ran:
ceph osd metadata 10
and all the bluestore_db items are pointing to the SSD now.
OK, so now to note these steps/commands in to "Ceph Notes" and the
repeat the process for the other HDDs on this node and my other four 😊
Thank you *so* much for your help (and patience!)
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