From: Thomas Lamprecht <t.lamprecht@proxmox.com>
To: Alexandre Derumier <alexandre.derumier@groupe-cyllene.com>,
pve-devel@lists.proxmox.com
Subject: Re: [pve-devel] [PATCH-SERIES v8 pve-storage/qemu-server] add external qcow2 snapshot support
Date: Wed, 16 Jul 2025 17:15:27 +0200 [thread overview]
Message-ID: <45f99f85-19e2-497e-96b4-c22b9a33de6a@proxmox.com> (raw)
In-Reply-To: <20250709162202.2952597-1-alexandre.derumier@groupe-cyllene.com>
Am 09.07.25 um 18:21 schrieb Alexandre Derumier:
> This patch series implement qcow2 external snapshot support for files && lvm volumes
>
> The current internal qcow2 snapshots have bad write performance because no metadatas can be preallocated.
>
> This is particulary visible on a shared filesystem like ocfs2 or gfs2.
>
> Also other bugs are freeze/lock reported by users since years on snapshots delete on nfs
> (The disk access seem to be frozen during all the delete duration)
>
> This also open doors for remote snapshot export-import for storage replication.
>
Wolfgang now applied all patches and some follow-ups, we test this a bit
more internal, but if nothing grave comes up this should be included in
upcoming PVE 9 - great work!
btw. and mostly out of interest: What was the status for using qcow2 for
thin-provisioning idea again? I know there was some discussion, but could
not quickly find what the last status was.
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next prev parent reply other threads:[~2025-07-16 15:14 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20250709162202.2952597-1-alexandre.derumier@groupe-cyllene.com>
2025-07-09 16:21 ` [pve-devel] [PATCH pve-storage 01/13] plugin: add qemu_img_create Alexandre Derumier via pve-devel
2025-07-09 16:21 ` [pve-devel] [PATCH qemu-server 1/4] qemu_img convert : add external snapshot support Alexandre Derumier via pve-devel
2025-07-09 16:21 ` [pve-devel] [PATCH qemu-server 2/4] blockdev: add backing_chain support Alexandre Derumier via pve-devel
2025-07-15 9:02 ` Wolfgang Bumiller
2025-07-09 16:21 ` [pve-devel] [PATCH pve-storage 02/13] plugin: add qemu_img_create_qcow2_backed Alexandre Derumier via pve-devel
2025-07-09 16:21 ` [pve-devel] [PATCH pve-storage 03/13] plugin: add qemu_img_info Alexandre Derumier via pve-devel
2025-07-09 16:21 ` [pve-devel] [PATCH qemu-server 3/4] qcow2: add external snapshot support Alexandre Derumier via pve-devel
2025-07-15 13:21 ` Wolfgang Bumiller
2025-07-15 14:21 ` DERUMIER, Alexandre via pve-devel
2025-07-15 14:31 ` Wolfgang Bumiller
2025-07-09 16:21 ` [pve-devel] [PATCH pve-storage 04/13] plugin: add qemu_img_measure Alexandre Derumier via pve-devel
2025-07-09 16:21 ` [pve-devel] [PATCH qemu-server 4/4] tests: fix efi vm-disk-100-0.raw -> vm-100-disk-0.raw Alexandre Derumier via pve-devel
2025-07-09 16:21 ` [pve-devel] [PATCH pve-storage 05/13] plugin: add qemu_img_resize Alexandre Derumier via pve-devel
2025-07-09 16:21 ` [pve-devel] [PATCH pve-storage 06/13] rbd && zfs : create_base : remove $running param from volume_snapshot Alexandre Derumier via pve-devel
2025-07-09 16:21 ` [pve-devel] [PATCH pve-storage 07/13] storage: volume_snapshot: add $running param Alexandre Derumier via pve-devel
2025-07-09 16:21 ` [pve-devel] [PATCH pve-storage 08/13] storage: add rename_snapshot method Alexandre Derumier via pve-devel
2025-07-09 16:21 ` [pve-devel] [PATCH pve-storage 09/13] storage: add volume_support_qemu_snapshot Alexandre Derumier via pve-devel
2025-07-15 11:33 ` Wolfgang Bumiller
2025-07-15 13:59 ` DERUMIER, Alexandre via pve-devel
[not found] ` <4756bd155509ba20a3a6bf16191f1a539ee5b23e.camel@groupe-cyllene.com>
2025-07-15 14:49 ` Wolfgang Bumiller
2025-07-15 15:38 ` DERUMIER, Alexandre via pve-devel
2025-07-16 10:21 ` Wolfgang Bumiller
2025-07-09 16:21 ` [pve-devel] [PATCH pve-storage 10/13] plugin: fix volname parsing Alexandre Derumier via pve-devel
2025-07-09 16:22 ` [pve-devel] [PATCH pve-storage 11/13] qcow2: add external snapshot support Alexandre Derumier via pve-devel
2025-07-09 16:22 ` [pve-devel] [PATCH pve-storage 12/13] lvmplugin: add qcow2 snapshot Alexandre Derumier via pve-devel
2025-07-09 16:22 ` [pve-devel] [PATCH pve-storage 13/13] tests: add lvmplugin test Alexandre Derumier via pve-devel
2025-07-16 15:15 ` Thomas Lamprecht [this message]
2025-07-17 8:01 ` [pve-devel] [PATCH-SERIES v8 pve-storage/qemu-server] add external qcow2 snapshot support DERUMIER, Alexandre via pve-devel
2025-07-17 14:49 ` Tiago Sousa via pve-devel
[not found] ` <1fddff1a-b806-475a-ac75-1dd0107d1013@eurotux.com>
2025-07-17 15:08 ` DERUMIER, Alexandre via pve-devel
[not found] ` <47b76678f969ba97926c85af4bf8e50c9dda161d.camel@groupe-cyllene.com>
2025-07-17 15:42 ` Tiago Sousa via pve-devel
[not found] ` <58c2db18-c2c2-4c91-9521-bdb42a302e93@eurotux.com>
2025-07-17 15:53 ` DERUMIER, Alexandre via pve-devel
2025-07-17 16:05 ` DERUMIER, Alexandre via pve-devel
2025-07-09 16:21 Alexandre Derumier via pve-devel
2025-07-10 15:13 ` Fabian Grünbichler
2025-07-10 15:46 ` DERUMIER, Alexandre via pve-devel
[not found] ` <c6c3457906642a30ddffc0f6b9d28ea6a745ac7c.camel@groupe-cyllene.com>
2025-07-10 16:29 ` Thomas Lamprecht
2025-07-11 12:04 ` DERUMIER, Alexandre via pve-devel
2025-07-14 6:25 ` DERUMIER, Alexandre via pve-devel
2025-07-14 8:18 ` DERUMIER, Alexandre via pve-devel
2025-07-14 8:42 ` DERUMIER, Alexandre via pve-devel
[not found] ` <26badbf66613a89e63eaad8b24dd05567900250b.camel@groupe-cyllene.com>
2025-07-14 11:02 ` Fabian Grünbichler
2025-07-15 4:15 ` DERUMIER, Alexandre via pve-devel
[not found] ` <719c71b1148846e0cdd7e5c149d8b20146b4d043.camel@groupe-cyllene.com>
2025-07-14 11:04 ` Fabian Grünbichler
2025-07-14 11:11 ` Thomas Lamprecht
2025-07-14 11:15 ` Fabian Grünbichler
2025-07-14 11:27 ` Thomas Lamprecht
2025-07-14 11:46 ` Fabian Grünbichler
2025-07-14 15:12 ` Tiago Sousa via pve-devel
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