Amdump fails to create level 0 dumps

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Issue: Amanda fails to create level 0 dump but creates incrementals

Logs: Look at amdump logs at /etc/amanda/<configuration>/amdump.1 log for errors

Cause: One of the possible reasons can be

From amdump logs

DELAYING DUMPS IF NEEDED, total_size 17273355, tape length 16974848 mark 15
 delay: machine.company.com / 20051017 0 [dump larger than tape, 17273214 KB,
 full dump delayed] now at level 3
 delay: Total size now 6615786.

Level 0 dump size estimate is 17273355. The tape size is smaller. So Amanda creates incrementals.

Solution

Reduce the size of DLE "/" by splitting DLE into multiple DLEs
Exclude the some of files being backed up

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