Incremental backup not working due to http 400 Bad Request

[mra]

The incremental backup fails and instead a full backup is performed as seen below (GET /previous: 400 Bad Request)

2021-08-20T14:40:01+02:00: starting new backup on datastore 'foo-1': "host/foo/2021-08-20T12:40:01Z"
2021-08-20T14:40:01+02:00: download 'index.json.blob' from previous backup.
2021-08-20T14:40:01+02:00: GET /previous: 400 Bad Request: Unable to open dynamic index "/backup-1/foo-1/host/foo/2021-08-20T12:36:01Z/naspool-files.pxar.didx" - No such file or directory (os error 2)
2021-08-20T14:40:01+02:00: created new dynamic index 1 ("host/foo/2021-08-20T12:40:01Z/catalog.pcat1.didx")
2021-08-20T14:40:01+02:00: created new dynamic index 2 ("host/foo/2021-08-20T12:40:01Z/naspool-files.pxar.didx")
2021-08-20T15:24:07+02:00: Upload statistics for 'naspool-files.pxar.didx'
2021-08-20T15:24:07+02:00: UUID: 59a0f9821a1a47b887da7d36eef1c270
2021-08-20T15:24:07+02:00: Checksum: fa36dc2e624a07ab758bec065f7ac7f097d769b1a402134bda151629ce946b69
2021-08-20T15:24:07+02:00: Size: 259248505194
2021-08-20T15:24:07+02:00: Chunk count: 58593
2021-08-20T15:24:07+02:00: Upload size: 231683081977 (89%)
2021-08-20T15:24:07+02:00: Duplicates: 7113+51478 (99%)
2021-08-20T15:24:07+02:00: Compression: 71%
2021-08-20T15:24:07+02:00: successfully closed dynamic index 2
2021-08-20T15:24:07+02:00: Upload statistics for 'catalog.pcat1.didx'
2021-08-20T15:24:07+02:00: UUID: c25f574047b14334bd54be96c9cd338d
2021-08-20T15:24:07+02:00: Checksum: 6b13848483e05decd677730e2475850af735811827dd227de454c12bd0605100
2021-08-20T15:24:07+02:00: Size: 5080105
2021-08-20T15:24:07+02:00: Chunk count: 9
2021-08-20T15:24:07+02:00: Upload size: 5080105 (100%)
2021-08-20T15:24:07+02:00: Duplicates: 0+8 (88%)
2021-08-20T15:24:07+02:00: Compression: 22%
2021-08-20T15:24:07+02:00: successfully closed dynamic index 1
2021-08-20T15:24:07+02:00: add blob "/backup-1/foo-1/host/foo/2021-08-20T12:40:01Z/index.json.blob" (324 bytes, comp: 324)
2021-08-20T15:24:07+02:00: successfully finished backup
2021-08-20T15:24:07+02:00: backup finished successfully
2021-08-20T15:24:07+02:00: TASK OK

We recently installed proxmox backup server 2.0.7 on a bare metal server, using the installer. The storage is built with ZFS and 5 mirrors in a pool.

zfs version
zfs-2.0.5-pve1
zfs-kmod-2.0.5-pve1

On the client side we have a Debian buster/10 host (bare metal as well). Looking at the versions, seems there is no 2.x version for the client for Debian buster?

proxmox-backup-client version
client version: 1.1.10
server version: 2.0.7

Should client 1.1.10 work or is 2.x required? and in that case is it possible to install 2.x on buster?
We use following apt source:
deb http://download.proxmox.com/debian/pbs-client buster main

Our crontab on the client is configured as:

PBS_REPOSITORY=...
PBS_PASSWORD=...

/usr/bin/proxmox-backup-client backup naspool-files.pxar:/naspool/files

 

[dcsapak]

/backup-1/foo-1/host/foo/2021-08-20T12:36:01Z/naspool-files.pxar.didx

does that file exist ? if the folder for a snapshot is there, but no index file, that is a problem

Should client 1.1.10 work or is 2.x required? and in that case is it possible to install 2.x on buster?

using 1.x client on 2.x server should work

 

[mra]

Hi dcsapak! After not finding a solution for this and mostly due to lack of supported client dists/versions, we decided to evaluate other backup solutions.