From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from firstgate.proxmox.com (firstgate.proxmox.com [212.224.123.68]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by lists.proxmox.com (Postfix) with ESMTPS id 6AEF266EC5; Mon, 11 Jan 2021 12:15:15 +0100 (CET) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id 6F38C191BD; Mon, 11 Jan 2021 12:14:43 +0100 (CET) Received: from proxmox-new.maurer-it.com (proxmox-new.maurer-it.com [212.186.127.180]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by firstgate.proxmox.com (Proxmox) with ESMTPS id 79D30190F9; Mon, 11 Jan 2021 12:14:40 +0100 (CET) Received: from proxmox-new.maurer-it.com (localhost.localdomain [127.0.0.1]) by proxmox-new.maurer-it.com (Proxmox) with ESMTP id 463A145F69; Mon, 11 Jan 2021 12:14:40 +0100 (CET) From: Stefan Reiter To: pve-devel@lists.proxmox.com, pbs-devel@lists.proxmox.com Date: Mon, 11 Jan 2021 12:13:58 +0100 Message-Id: <20210111111409.32385-1-s.reiter@proxmox.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SPAM-LEVEL: Spam detection results: 0 AWL -0.041 Adjusted score from AWL reputation of From: address KAM_DMARC_STATUS 0.01 Test Rule for DKIM or SPF Failure with Strict Alignment RCVD_IN_DNSWL_MED -2.3 Sender listed at https://www.dnswl.org/, medium trust SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_PASS -0.001 SPF: sender matches SPF record Subject: [pve-devel] [PATCH 00/11] live-restore for PBS snapshots X-BeenThere: pve-devel@lists.proxmox.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: Proxmox VE development discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 11 Jan 2021 11:15:15 -0000 "live-restore" allows starting a VM immediately from a backup snapshot, no waiting for a long restore process. This is made possible with QEMU backing images, i.e. data is read from the backup which is attached to the VM as a drive, but new data is written to the destination, while a background process ('block-stream') copies over data in a linear fashion as well. QEMU backing images are normally only supported for qcow2 images, but since the destination always starts out empty, we can use a dirty bitmap to achieve the same effect - this is implemented as the 'alloc-track' driver in the 'qemu' part of the series. The Rust part of the equation is adjusted to provide (quiet a lot) more caching, as mixing random read/write from the guest with the linear reads from the background process (both of which may use read sizes smaller or bigger than a single chunk) would thrash performance without large buffers. I've marked the feature as 'experimental' in the GUI for now, as I'm sure there are a lot of edge cases I've missed to test, and there's also the possibility of data loss, since anything the VM writes during the restore is removed if the restore fails. qemu: Stefan Reiter (3): PVE: explicitly add libuuid as linking dependency PVE: block/pbs: fast-path reads without allocation if possible block: add alloc-track driver Makefile.objs | 2 + block/Makefile.objs | 1 + block/alloc-track.c | 319 ++++++++++++++++++++++++++++++++++++++++++++ block/pbs.c | 17 ++- 4 files changed, 336 insertions(+), 3 deletions(-) create mode 100644 block/alloc-track.c proxmox-backup: Stefan Reiter (1): RemoteChunkReader: add LRU cached variant src/bin/proxmox_backup_client/mount.rs | 4 +- src/client/remote_chunk_reader.rs | 77 ++++++++++++++++++++------ 2 files changed, 62 insertions(+), 19 deletions(-) proxmox-backup-qemu: Stefan Reiter (1): access: use bigger cache and LRU chunk reader src/restore.rs | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) qemu-server: Stefan Reiter (5): make qemu_drive_mirror_monitor more generic cfg2cmd: allow PBS snapshots as backing files for drives enable live-restore for PBS extract register_qmeventd_handle to QemuServer.pm live-restore: register qmeventd handle PVE/API2/Qemu.pm | 15 ++- PVE/QemuServer.pm | 263 ++++++++++++++++++++++++++++++++------- PVE/VZDump/QemuServer.pm | 32 +---- 3 files changed, 233 insertions(+), 77 deletions(-) manager: Stefan Reiter (1): ui: restore: add live-restore checkbox www/manager6/grid/BackupView.js | 8 +++++-- www/manager6/storage/BackupView.js | 7 ++++-- www/manager6/window/Restore.js | 38 +++++++++++++++++++++++++++++- 3 files changed, 48 insertions(+), 5 deletions(-) -- 2.20.1