In CAPM 3.x we upgraded the embedded Vertica version we use from 7.1.x to 7.2.x
As a result, there are some differences in the backup log names due to changes made by Vertica.
Vertica backup logs will be found in
/tmp/vbr
And will have a naming convention of vbr$d.log (where $d is a time stamp)
e.g.
vbr_2017-01-25-111749.log
In a multi-node Vertica cluster, backup logs will only exist on the host where you ran the backup.