Full backup - VM failed in first attempt but successful in second attempt
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Even with compression? So it could be the dom0 overloaded with too many zstd pipes or something, interesting feedback.
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@olivierlambert yes, with compression.
In other 8 VMs there are larger VMs(larger diskd, more disks, more ram, more cpu), so export has higher load than this one VM, but only this one fails if it runs with concurrency more than 1.
Compression is a requirement for this situation because backups are synced to remote location over internet.
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I understand your requirements, I'm trying to pinpoint the issue. For now, everything converge on dom0 load when having many zstd processes at once.
