Backups with BC3
In response to Sanjiv's post in the public BC3 News forum:
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Subject: Re: BC3 Feature Request
Posted on: 10/24/07 09:48 PM
Regarding the features of BACKUP, I use BC to take backups of my computer. I may not be able, efficient to be able to provide more of details at the moment, however it will be nice if there is a software from ScooterSoftware that works as a full fledged backup maintainance utility. BC is already doing most of the jobs efficiently.
Regards
Sanjiv Bansal
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Backup routines often use the archive bit to determine if a file needs to be backed up...and resets the archive bit when the file is backed up. I am not sure if that is what Sanjiv is thinking. More likely he is wanting to perform a one-way folder sync...copy files to side B if there are orphans or changed files on side A. With a utility like BC, you could let users do it either way:
If I were designing a backup feature, I think I would support incremental changes as follows:
Option 1 - Using archive bit
First time back-up runs (or as scheduled): create a date/time qualified compressed archive of all files in folder being backed up and reset all archive bits.
Subsequent back-up runs, create a date/time qualified compressed archive of all files with archive bit and reset the archive bit.
Option 2 - Using file compare (do not change archive bits)
First time back-up runs or as scheduled: create a date/time qualified compressed archive of all files in folder being backed up
Subsequent back-up runs, compare files against archive files (starting with latest incremental archive and working back to last full archive). If file is not found, it is an orphan. Back it up. If file is found, compare it. If changes are detected, back it up.
Michael Bulgrien
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Subject: Re: BC3 Feature Request
Posted on: 10/24/07 09:48 PM
Regarding the features of BACKUP, I use BC to take backups of my computer. I may not be able, efficient to be able to provide more of details at the moment, however it will be nice if there is a software from ScooterSoftware that works as a full fledged backup maintainance utility. BC is already doing most of the jobs efficiently.
Regards
Sanjiv Bansal
----------------------------------------------------------------------
Backup routines often use the archive bit to determine if a file needs to be backed up...and resets the archive bit when the file is backed up. I am not sure if that is what Sanjiv is thinking. More likely he is wanting to perform a one-way folder sync...copy files to side B if there are orphans or changed files on side A. With a utility like BC, you could let users do it either way:
If I were designing a backup feature, I think I would support incremental changes as follows:
Option 1 - Using archive bit
First time back-up runs (or as scheduled): create a date/time qualified compressed archive of all files in folder being backed up and reset all archive bits.
Subsequent back-up runs, create a date/time qualified compressed archive of all files with archive bit and reset the archive bit.
Option 2 - Using file compare (do not change archive bits)
First time back-up runs or as scheduled: create a date/time qualified compressed archive of all files in folder being backed up
Subsequent back-up runs, compare files against archive files (starting with latest incremental archive and working back to last full archive). If file is not found, it is an orphan. Back it up. If file is found, compare it. If changes are detected, back it up.
Michael Bulgrien
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