Okay, interesting discussion.
My full backup has at the moment 1,8 TB, Spooling time from the FD to
the SD is around 15 hours, because there is a mail archive with a lot of
small files.
Despooling is done in 3h 51min. This was with a block size of 63 k, I
have now increase it to 1M
The backup to tape is for the worst case scenario, if all my server are
encrypted by a hacker. Additional are RAID-5 hardware systems and rsync
scripts with daily differentials and done to a server outside the
building on the next house and a 2nd server in a data center. So I
would have all time I think.
If I do decide to daily full backup, a LTO-7 tape would have 6 TB / 1,8
TB = 3 full backups = 3 Days.
Based on 20 working days per month, around 7 tapes I would have on
rotation. That's worth to sleep one night about this.
all the best, Frank
Am 07.01.2021 um 13:30 schrieb DUCARROZ Birgit:
Yup this is a personal decision, that's right and every sysadmin
should check their own needs and possibilities.
We have 6TB (15TB compression) LTO-7 cartridges and about 20 TB of data.
I decided to do it this way because I read in the originally bacula
book (from Philippe Storz) how backup is handling the tapes and
because even Philippe Storz himself advised me that this is a good way
to backup on single tapes.
See the following treat:
https://groups.google.com/g/bareos-users/c/g53BNdTat2s
Regards,
Birgit
On 07/01/21 13:12, Spadajspadaj wrote:
Well, not everyone has long enough tapes to always do full backups
;-) After all the whole concept of Inc and Diff backups didn't come
from nothing.
On 07/01/2021 13:10, 'DUCARROZ Birgit' via bareos-users wrote:
Hi,
Another possibility is not to spool and not to backup incremental
nor differential jobs.
For restoring speed and for your tape health it is better to always
do full backups, especially if you have no autochanger.
I deleted all jobs which do no full backup.
I did the configuration in a way, that once a month it asks me to
change the tape and this for each job. In this way I do a full
backup twice in a year of each job by manipulating tapes only once
per month. This is for me an easy way to handle the tapes.
The job tells me to insert cartridge 1 and as soon it is inserted,
the job continues automatically. One month later it asks me for
cartgidge 2 and so on.
Let me know if you are interested to know how to configure such a
handling.
Regards,
Birgit
On 07/01/21 11:03, 'Frank Cherry' via bareos-users wrote:
Hi there,
this is my schedule set:
Schedule {
Name = "CR-WeeklyCycle"
Run = Level=Full 1st sun at 7:00
Run = Level=Differential 2nd-5th sun at 7:00
Run = Level=Incremental mon-sat at 7:00
}
The backup is stored on a LTO tape, changed manually - no autoloader.
Looking on the schedule, a tape of the increment pool is insert on
Saturday morining.
When now a differential or full backup is started, it checks first
if the right tape is insert.
So I have do by manpower, that the right tape is available before
the backup starts.
All backup jobs like inc, diff and full have spooling active.
Is there a way, that the nackups starts, and spools also if the
wring tape is insert and after changing to the right tape, the
despooling process starts or must I split it each backup in two
jobs: copy to hdd and then to tape?
Thanks for any useful hints, Frank
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