\section{Accurate}
\index[general]{Accurate Backup}
As with most other backup programs, Bacula decides what files to backup
-for Incremental and Differental backup by comparing the change (st_ctime)
-and modification (st_mtime) times of the file to the time the last backup completed.
+for Incremental and Differental backup by comparing the change (st\_ctime)
+and modification (st\_mtime) times of the file to the time the last backup completed.
If one of those two times is later than the last backup time, then the file
will be backed up. This does not, however, permit tracking what files have
been deleted and will miss any file with an old time that may have been
should run concurrently. The default is set to 1, but you may set it to a
larger number.
- Please note that the Volume format becomes much more complicated with
- multiple simultaneous jobs, consequently, restores can take much longer if
+ The Volume format becomes more complicated with
+ multiple simultaneous jobs, consequently, restores may take longer if
Bacula must sort through interleaved volume blocks from multiple simultaneous
- jobs. This can be avoided by having each simultaneously running job write to
+ jobs. This can be avoided by having each simultaneous job write to
a different volume or by using data spooling, which will first spool the data
- to disk simultaneously, then write each spool file to the volume in
- sequence.
+ to disk simultaneously, then write one spool file at a time to the volume
+ thus avoiding excessive interleaving of the different job blocks.
- There may also still be some cases where directives such as {\bf Maximum
- Volume Jobs} are not properly synchronized with multiple simultaneous jobs
- (subtle timing issues can arise), so careful testing is recommended.
-
- At the current time, there is no configuration parameter set to limit the
+ At the current time, there is no configuration parameter set to limit the
number of console connections. A maximum of five simultaneous console
connections are permitted.
with the same name as the resource in which it appears. Any other
restrictions on the maximum concurrent jobs such as in the Director, Job, or
Storage resources will also apply in addition to any limit specified here.
- The default is set to 1, but you may set it to a larger number. We strongly
- recommend that you read the WARNING documented under
- \ilink{ Maximum Concurrent Jobs}{DirMaxConJobs} in the Director's
- resource.
+ The default is set to 1, but you may set it to a larger number.
\item [Priority = \lt{}number\gt{}]
\index[dir]{Priority}