mirror of
https://git.proxmox.com/git/proxmox-backup
synced 2025-08-03 15:15:14 +00:00
4694dede0e
rationale is that it makes the backup much safer than 'none', but does not incur a big of a performance hit as 'file'. here some benchmark: data to be backed up: ~14GiB semi-random test images between 12kiB and 4GiB that results in ~11GiB chunks (more than ram available on the target) PBS setup: virtualized (on an idle machine), PBS itself was also idle 8 cores (kvm64 on Intel 12700k) and 8 GiB memory all virtual disks are on LVM with discard and iothread on the HDD is a 4TB Seagate ST4000DM000 drive, and the NVME is a 2TB Crucial CT2000P5PSSD8 i tested each disk with ext4/xfs/zfs (default created with the gui) with 5 runs each, inbetween the caches are flushed and the filesystem synced i removed the biggest and smallest result and from the remaining 3 results built the average (percentage is relative to the 'none' result) result: test none filesystem file hdd - ext4 125.67s 140.39s (+11.71%) 358.10s (+184.95%) hdd - xfs 92.18s 102.64s (+11.35%) 351.58s (+281.41%) hdd - zfs 94.82s 104.00s (+9.68%) 309.13s (+226.02%) nvme - ext4 60.44s 60.26s (-0.30%) 60.47s (+0.05%) nvme - xfs 60.11s 60.47s (+0.60%) 60.49s (+0.63%) nvme - zfs 60.83s 60.85s (+0.03%) 60.80s (-0.05%) So all in all, it does not seem to make a difference for nvme drives, for hdds 'filesystem' increases backup time by ~10%, while for 'file' it largely depends on the filesystem, but always in the range of factor ~3 - ~4 Note that this does not take into account parallel actions, such as gc, verify or other backups. Signed-off-by: Dominik Csapak <d.csapak@proxmox.com> |
||
|---|---|---|
| .. | ||
| _ext | ||
| _templates | ||
| api-viewer | ||
| config | ||
| images | ||
| lto-barcode | ||
| pmt | ||
| pmtx | ||
| proxmox-backup | ||
| proxmox-backup-client | ||
| proxmox-backup-debug | ||
| proxmox-backup-manager | ||
| proxmox-backup-proxy | ||
| proxmox-file-restore | ||
| proxmox-tape | ||
| prune-simulator | ||
| pxar | ||
| backup-client.rst | ||
| backup-protocol.rst | ||
| calendarevents.rst | ||
| certificate-management.rst | ||
| command-line-tools.rst | ||
| command-syntax.rst | ||
| conf.py | ||
| configuration-files.rst | ||
| custom.css | ||
| custom.js | ||
| epilog.rst | ||
| faq.rst | ||
| file-formats.rst | ||
| GFDL.rst | ||
| glossary.rst | ||
| gui.rst | ||
| index.rst | ||
| installation.rst | ||
| introduction.rst | ||
| local-zfs.rst | ||
| maintenance.rst | ||
| Makefile | ||
| managing-remotes.rst | ||
| markdown-primer.rst | ||
| network-management.rst | ||
| output-format.rst | ||
| package-repositories.rst | ||
| pbs-copyright.rst | ||
| pve-integration.rst | ||
| pxar-format-overview.dot | ||
| pxar-tool.rst | ||
| services.rst | ||
| storage.rst | ||
| sysadmin.rst | ||
| system-booting.rst | ||
| system-requirements.rst | ||
| tape-backup.rst | ||
| technical-overview.rst | ||
| terminology.rst | ||
| todos.rst | ||
| traffic-control.rst | ||
| user-management.rst | ||