Re: Right way to delete OSD from cluster?

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Hi!

But unless after "ceph osd crush remove" I will not got the undersized objects? That is, this is not the same thing as simply turning off the OSD and waiting for the cluster to be restored?

----- Original Message -----
From: "Wido den Hollander" <wido@xxxxxxxx>
To: "Fyodor Ustinov" <ufm@xxxxxx>, "ceph-users" <ceph-users@xxxxxxxxxxxxxx>
Sent: Wednesday, 30 January, 2019 15:05:35
Subject: Re:  Right way to delete OSD from cluster?

On 1/30/19 2:00 PM, Fyodor Ustinov wrote:
> Hi!
> 
> I thought I should first do "ceph osd out", wait for the end relocation of the misplaced objects and after that do "ceph osd purge".
> But after "purge" the cluster starts relocation again.
> 
> Maybe I'm doing something wrong? Then what is the correct way to delete the OSD from the cluster?
> 

You are not doing anything wrong, this is the expected behavior. There
are two CRUSH changes:

- Marking it out
- Purging it

You could do:

$ ceph osd crush remove osd.X

Wait for all good

$ ceph osd purge X

The last step should then not initiate any data movement.

Wido

> WBR,
>     Fyodor.
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