Re: Space reclaim doesn't happening in nautilus RBD pool

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Thrash empty.


Istvan Szabo
Staff Infrastructure Engineer
---------------------------------------------------
Agoda Services Co., Ltd.
e: istvan.szabo@xxxxxxxxx<mailto:istvan.szabo@xxxxxxxxx>
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________________________________
From: Ilya Dryomov <idryomov@xxxxxxxxx>
Sent: Thursday, November 30, 2023 6:27 PM
To: Szabo, Istvan (Agoda) <Istvan.Szabo@xxxxxxxxx>
Cc: Ceph Users <ceph-users@xxxxxxx>
Subject: Re:  Space reclaim doesn't happening in nautilus RBD pool

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On Thu, Nov 30, 2023 at 8:25 AM Szabo, Istvan (Agoda)
<Istvan.Szabo@xxxxxxxxx> wrote:
>
> Hi,
>
> Is there any config on Ceph that block/not perform space reclaim?
> I test on one pool which has only one image 1.8 TiB in used.
>
>
> rbd $p du im/root
> warning: fast-diff map is not enabled for root. operation may be slow.
> NAME            PROVISIONED USED
> root     2.2 TiB 1.8 TiB
>
>
>
> I already removed all snaphots and now pool has only one image alone.
> I run both fstrim  over the filesystem (XFS) and try rbd sparsify im/root  (don't know what it is exactly but it mentions to reclaim something)
> It still shows the pool used 6.9 TiB which totally not make sense right? It should be up to 3.6 (1.8 * 2) according to its replica?

Hi Istvan,

Have you checked RBD trash?

$ rbd trash ls -p im

Thanks,

                Ilya

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