Hi, Seems like the sparsify and manual fstrim is doing what it needs to do. When sparsify the image, if image has snapshots let say 3 snapshots, need to wait until it rotates all of them (remove and create with new set instead). I think it reclaims some of it too but I guess it up to free space on that filesystem/volume. Those two commands together really reclaims back after snapshot is rotated. This article is interesting https://www.ibm.com/docs/en/storage-fusion/2.6?topic=resources-reclaiming-space-target-volumes does both sparsify/fstrim to achieve reclaim. Istvan Szabo Staff Infrastructure Engineer --------------------------------------------------- Agoda Services Co., Ltd. e: istvan.szabo@xxxxxxxxx<mailto:istvan.szabo@xxxxxxxxx> --------------------------------------------------- ________________________________ From: Ilya Dryomov <idryomov@xxxxxxxxx> Sent: Monday, December 4, 2023 6:10 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 Email received from the internet. If in doubt, don't click any link nor open any attachment ! ________________________________ Hi Istvan, The number of objects in "im" pool (918.34k) doesn't line up with "rbd du" output which says that only 2.2T are provisioned (that would take roughly ~576k objects). This usually occurs when there are object clones caused by previous snapshots -- keep in mind that trimming object clones after a snapshot is removed is an asynchronous process and it can take a while. Just to confirm, what is the output of "rbd info im/root", "rbd snap ls --all im/root", "ceph df" (please recapture) and "ceph osd pool ls detail" (only "im" pool is of interest)? Thanks, Ilya On Fri, Dec 1, 2023 at 5:31 AM Szabo, Istvan (Agoda) <Istvan.Szabo@xxxxxxxxx> wrote: > > Thrash empty. > > Istvan Szabo > Staff Infrastructure Engineer > --------------------------------------------------- > Agoda Services Co., Ltd. > e: istvan.szabo@xxxxxxxxx > --------------------------------------------------- > > > > ________________________________ > 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 > > Email received from the internet. If in doubt, don't click any link nor open any attachment ! > ________________________________ > > 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 > > ________________________________ > > This message is confidential and is for the sole use of the intended recipient(s). It may also be privileged or otherwise protected by copyright or other legal rules. If you have received it by mistake please let us know by reply email and delete it from your system. It is prohibited to copy this message or disclose its content to anyone. Any confidentiality or privilege is not waived or lost by any mistaken delivery or unauthorized disclosure of the message. All messages sent to and from Agoda may be monitored to ensure compliance with company policies, to protect the company's interests and to remove potential malware. Electronic messages may be intercepted, amended, lost or deleted, or contain viruses. _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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