[OpenAFS] Incremental backups

[Kristen J. Webb]

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Tom Fitzgerald wrote:
>> We also ran into
>> problems with time between running on the command line vs.
>> cron.  Our software compares time stamps in the vos dump
>> headers to avoid these types of problems.
> 
> I'm not sure what you mean here.  Your software assumed the
> current wallclock time was the time cron normally ran it, which
> was wrong when it was run from the command line?
> 
> The script here creates a timestamp file before running vos backup,
> then does incrementals relative to the timestamp file, to avoid
> having to pick through the dump file (and deal with potential
> future format changes), which should suffice.
As I recall this was a problem with the OS, not AFS.
I think it may have been that cron was restarted on
the command line by someone, and that is when the
time stamp inconsistencies began.  We also audit all
of the vnodes from backup to backup, and that is how
we were able to discover it.  Normally, I would not
expect anyone to run into this, but checking the
unix times in the dump headers has resolved this problem
for us.
> 
> 
> _______________________________________________
> OpenAFS-info mailing list
> OpenAFS-info@openafs.org
> https://lists.openafs.org/mailman/listinfo/openafs-info
> 
> 

-- 
Mr. Kristen J. Webb
Teradactyl LLC.

PHONE: 1-505-242-1091
EMAIL: kwebb@teradactyl.com
VISIT: http://www.teradactyl.com

  	Home of the

  True incremental Backup System

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