Proxmox Backups – zstd and zpaq tested with astonishing results, 100% saving over multiple backups! Standard This post is in progress, and currently only shows the raw data I have collected this weekend on my Proxmox Backups, testing between zstd and zpaq. I will be doing a full write up over the next few days, so check back for that 🙂 Proxmox Static Backups - Space Saving Original Backups 605M Oct 10 11:38 vzdump-qemu-101-2021_10_10-11_37_35.vma.zst 884M Oct 10 11:38 vzdump-qemu-102-2021_10_10-11_38_05.vma.zst 3650M Oct 10 11:40 vzdump-qemu-104-2021_10_10-11_38_39.vma.zst 393M Oct 10 11:41 vzdump-qemu-105-2021_10_10-11_40_32.vma.zst 2493M Oct 10 15:35 vzdump-qemu-200-2021_10_10-15_34_05.vma.zst 12500M Oct 10 15:42 vzdump-qemu-201-2021_10_10-15_35_59.vma.zst 7164M Oct 10 15:46 vzdump-qemu-202-2021_10_10-15_42_01.vma.zst 730M Oct 10 11:42 vzdump-qemu-203-2021_10_10-11_41_07.vma.zst 2282M Oct 10 11:43 vzdump-qemu-204-2021_10_10-11_42_12.vma.zst 681M Oct 10 11:44 vzdump-qemu-300-2021_10_10-11_43_48.vma.zst 2215M Oct 10 11:46 vzdump-qemu-400-2021_10_10-11_44_51.vma.zst 469M Oct 10 11:46 vzdump-qemu-999-2021_10_10-11_46_19.vma.zst 34,066M Total (All Files) Backups archived and compressed with ZPAQ v7.15 (flags: -m5) Highest Compression Settings 379M Oct 14 00:43 vzdump-qemu-101.zpaq 639M Oct 14 04:31 vzdump-qemu-102.zpaq 2997M Oct 13 17:11 vzdump-qemu-104.zpaq 259M Oct 16 00:03 vzdump-qemu-105.zpaq 1700M Oct 14 19:14 vzdump-qemu-200.zpaq 9337M Oct 13 05:02 vzdump-qemu-201.zpaq 5387M Oct 12 03:17 vzdump-qemu-202.zpaq 496M Oct 13 23:41 vzdump-qemu-203.zpaq 1546M Oct 15 02:22 vzdump-qemu-204.zpaq 384M Oct 15 14:43 vzdump-qemu-300.zpaq 1471M Oct 13 15:23 vzdump-qemu-400.zpaq 24,595M Total (All Files) Compression Saving (without accounting for future deduplication savings) 9,471M compared to zstd compression. --- Adding a second backup to each file, to test deduplication Rough size of two total backups using zstd compression: 68,132M 413M Oct 16 12:15 vzdump-qemu-101.zpaq 680M Oct 16 12:18 vzdump-qemu-102.zpaq 3113M Oct 16 12:24 vzdump-qemu-104.zpaq 283M Oct 16 12:27 vzdump-qemu-105.zpaq 1775M Oct 16 12:32 vzdump-qemu-200.zpaq 12587M Oct 16 14:37 vzdump-qemu-201.zpaq 7741M Oct 16 16:08 vzdump-qemu-202.zpaq 537M Oct 16 16:14 vzdump-qemu-203.zpaq 1619M Oct 16 16:21 vzdump-qemu-204.zpaq 451M Oct 16 16:36 vzdump-qemu-300.zpaq 1782M Oct 16 16:56 vzdump-qemu-400.zpaq 313M Oct 16 17:16 vzdump-qemu-999.zpaq Total size of 2 full backups of each VM with zpaq and deduplication: 30,981M Saving over two zstd backups: 37,151M
