Hi Bacula users!
I often experience issues with the fact that Bacula assigned
multiple jobs to one tape volume, that when one of the jobs is
delayed or take too much time, all other jobs will also be
delayed. There seems to be limited we can do with this issue
with tape backup (let me know if I am not correct), but since we
are looking toward moving into having disk as storage-backend, I
am wondering whether there is anything I can do with disk-based
backup to reduce this issue. These methods seems promising:
1. Creating multiple "Device"s point to the same storage backend
and have a virtual "Autochanger" to manage them. It seems
that to alleviate the issue above, I need to set "Maximum
Concurrent Jobs" for each "Device" to 1, right? However, I am
wondering whether Bacula will spread the jobs to multiple
devices; previously with tape backup, most of the time Bacula
only use the primary / default device (tape drive).
2. Creating multiple "Pool"s and distribute the jobs among them.
This seems to require a lot of manual works, though. More
extreme (but actually less manual work), is having one "Pool"
per "Job" definition, therefore each volume will be dedicated
to 1 "Job" definition, and won't wait for another "Job".
3. Limit only one job instance per volume, i.e. "Maximum Volume
Jobs = 1", so Bacula cannot assign more than 1 job to a
volume. The issue is the number of volume files proliferating
in the storage backend.
4. Any other suggestions?
Thank you!
--
____ ____ ____ ____ (stephan paul) Arif Sahari Wibowo
/___ /___/ /___/ /___ http://www.arifsaha.com/
____/ / / / ____/
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