Hello, 2015-08-14 15:03 GMT+02:00 Ana Emília M. Arruda <emiliaarr...@gmail.com>:
> Hello Radoslow, > > I was talking about the configurations of the bacula user that originated > this thread. And I based my opinion on his pool configuration and list > media output. > > Well, in my very humble opinion there is no any evidence that RAT or Dimitri is making Full everyday. > I agree with you that some files are always backed up regardless of > whether or not you are using a full backup job. And this is the case of > virtual machine disk images. > You can always use a Delta plugin, Bacula GED(tm) or for VMware a Bacula vSphere plugin to get an block level Incremental backup of virtual machine images. You can save a lot of space in your archive. Delta and VSP is also working with tapes. In this case, IMHO there is a trade-off. Do I have enough space for keeping > a 1 year retention backups of all my disk images? Using above techniques you can have enough space for that. :) > Is this really necessary for me? > Depends. Do you ever need to restore something older that 1 week ago? Do you have any regulatory requirements (i.e. in my country there is a requirement for financial data to be available for 5 years), etc. I have seen solutions that have a weekly or monthly full backups for VM > disk images and daily backup for the data partitions of the virtual > machines that are susceptible of changes dieting the week/month. > Sounds to me like a tricky to manage. > Also, the most cases I had seen that needs a > Virtual machine disk image restore are: > > 1) disaster recover: in this case, the last backup is what we need. Having > this backup in more than one place is preferable than having later ones. > Right. Then you can use a job replication (SD->SD Copy Jobs) and techniques mentioned above for optimal performance. > 2) updates and/or upgrades in the virtual machine configuration do not > work: in this case we need a backup immediately before the changes were > made. In this case we can take care of always having a full backup before > doing any software changes in the virtual machine. > I do not understand what you mean. Sorry. Finally, there is a large number of situations and in some of them maybe it > could be necessary to have daily full backups. IMHO if we can avoid this, > we can save space destined for backups. > Yes. I always perform a full backups daily for Bacula config and database dump only. Simpler DR for Bacula itself. For every other Job I always make Full+Incremental. best regards -- Radosław Korzeniewski rados...@korzeniewski.net
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