Limitation File Restore List


Dec 1, 2020
Hi at all,

following general conditions are given:

- 12 node Proxmox-Cluster (48 x Intel(R) Xeon(R) CPU E5-2690 v3 / 256 GB RAM)
- 96 Osd Ceph-Pool -> 6x HDD / TOSHIBA_MG07ACA14TE + 2x SSD / SAMSUNG_MZILT7T6HALA_007 (Ceph-DB) per node
- 10 GBit Network
- 10 PBS VMs running
- 1 PBS VM (55 GB RAM, 16 CPUs, 35 TB Backup-Datastore XFS)

Last mentioned PBS VM is connected with another Proxmox-Cluster (9 nodes 24 x Intel(R) Xeon(R) CPU X5670, 142 GB RAM, 56 SSD OSDs, 30 VMs running) as Backup-Storage for VMs. 1 VM running on this cluster (32 GB RAM, 16 CPUs, 12 TB HDD (virtio, discard, iothread), OpenSuse Leap 15.4) is mailserver. 12 TB HDD has one directory "MAIL" with 23000 subdirectories (1 subdir per user), 10 TB are in use. PBS-client per CLI is working without any problems - for example: mapping PBS-snapshot and listing subdirs in MAIL-directory.
Listening / viewing subdirectories of MAIL-dir per Web-GUI (VM -> Backup -> File Restore -> click "+" of MAIL-dir) is not working. After waiting for about 4-5 minutes error code "list not finished in time (503)" appears. Logfiles (/var/log/proxmox-backup/file-restore/qemu.log + journalctl) do not show anything "unnormal" or error related.

What exactly is the root cause of this behaviour and how to solve this? Any hint / thought is welcome / helpful....

best regards
Last edited:

I did some tests about numbers of directories and behaviour of web-GUI listing the directories.
Result: maximum number of directories that will be listed correctly is 18999. From 19000 directories the mentioned error message ("list not finished in time (503)") appears.

best regards
Last edited:
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